Zoology
This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader, such as GoogleReader, or to display this data on your own website or blog. 
Subscribe to this data using MyMedWorm.
Subscribe to this data using GoogleReader.
Subscribe to this data using Bloglines.
Subscribe to this data using MyYahoo.
Get the very latest Swine Flu news via the MedWorm Swine Flu RSS news feed - updated hourly from thousands of authoritative health and news sources.
This page shows you the most recent publications within this specialty of the MedWorm directory. This is page number 11.
Patterns of praying mantid population density following cyclone disturbance in far north Queensland, Australia
Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
J. O'Hanlon, G. I. Holwell - Volume 57(2)
Source: Australian Journal of Zoology - July 9, 2009 Category: Zoology Source Type: journals
Reproduction in the northern brown bandicoot (Isoodon macrourus) in the Australian Wet TropicsEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Karl Vernes, Lisa Claire Pope - Volume 57(2)
Source: Australian Journal of Zoology - July 9, 2009 Category: Zoology Source Type: journals
Gliding performance and its relevance to gap crossing by the squirrel glider (Petaurus norfolcensis)Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Ross L. Goldingay, Brendan D. Taylor - Volume 57(2)
Source: Australian Journal of Zoology - July 9, 2009 Category: Zoology Source Type: journals
Testing for the relative contribution of patch neighborhood, patch internal structure, and presence of predators and competitor species in determining distribution patterns of rodents in a fragmented landscapeEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
A. Mortelliti, G. Amori, F. Annesi, and L. Boitani - Factors affecting the distribution of species in fragmented landscapes, and their relative importance, are often unclear. Few studies have deliberately compared various hypotheses in relatively...
Source: Canadian Journal of Zoology - July 9, 2009 Category: Zoology Source Type: journals
Attributing attention: the use of human-given cues by domestic horses (Equus caballus).Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Recent research has shown that domestic dogs are particularly good at determining the focus of human attention, often outperforming chimpanzees and hand-reared wolves. It has been suggested that the close evolutionary relationship between humans and dogs has led to the development of this ability; however, very few other domestic species have been studied. We tested the ability of 36 domestic horses to discriminate between an attentive and inattentive person in determining whom to approach for food. The cues provided were body orientation, head orientation or whether the experimenters' eyes were open or closed. A fourt...
Source: Animal Cognition - July 8, 2009 Category: Zoology Authors: Proops L, McComb K Tags: Anim Cogn Source Type: journals
Grey squirrels (Sciurus carolinensis) show a feature-negative effect specific to social learning.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Previous laboratory studies on social learning suggest that some animals can learn more readily if they first observe a conspecific demonstrator perform the task unsuccessfully and so fail to obtain a food reward than if they observe a successful demonstrator that obtains the food. This effect may indicate a difference in how easily animals are able to associate different outcomes with the conspecific or could simply be the result of having food present in only some of the demonstrations. To investigate we tested a scatter-hoarding mammal, the eastern grey squirrel, on its ability to learn to choose between two pots of...
Source: Animal Cognition - July 8, 2009 Category: Zoology Authors: Hopewell LJ, Leaver LA, Lea SE, Wills AJ Tags: Anim Cogn Source Type: journals
Fitting Models of Multiple Hypotheses to Partial Population Data: Investigating the Causes of Cycles in Red GrouseEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
The American Naturalist, Volume 0, Issue 0, Page 000, Latest Articles.
Abstract: There are two postulated causes for the observed periodic fluctuations (cycles) in red grouse (Lagopus lagopus scoticus). The first involves interaction with the parasitic nematode Trichostrongylus tenuis. The second invokes delayed regulation through the effect of male aggressiveness on territoriality. Empirical evidence exists to support both hypotheses, and each hypothesis has been modeled deterministically. However, little effort has gone into looking at the combined effects of the two mechanisms or formally fitting the corresponding...
Source: The American Naturalist - July 8, 2009 Category: Zoology Tags: article Source Type: journals
Quaternary Climate Change and the Geographic Ranges of MammalsEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
The American Naturalist, Volume 0, Issue 0, Page 000, Latest Articles.
Abstract: A species’ range can be a proxy for its ecological well‐being. Species with small and shrinking range distributions are particularly vulnerable to extinction. Future climate change scenarios are predicted to affect species’ geographical extents, but data on how species’ distributions respond to changing climate are largely anecdotal, and our understanding of the determinants and limits to species geographic ranges is surprisingly poor. Here we show that mammal species in more historically variable environments have larger geograp...
Source: The American Naturalist - July 8, 2009 Category: Zoology Tags: article Source Type: journals
Determining the Functional Form of Density Dependence: Deductive Approaches for Consumer‐Resource Systems Having a Single ResourceEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
The American Naturalist, Volume 0, Issue 0, Page 000, Latest Articles.
Abstract: Consumer‐resource models are used to deduce the functional form of density dependence in the consumer population. A general approach to determining the form of consumer density dependence is proposed; this involves determining the equilibrium (or average) population size for a series of different harvest rates. The relationship between a consumer’s mortality and its equilibrium population size is explored for several one‐consumer/one‐resource models. The shape of density dependence in the resource and the shape of the numerical a...
Source: The American Naturalist - July 8, 2009 Category: Zoology Tags: article Source Type: journals
Bumblebees Learn to Forage like BayesiansEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
The American Naturalist, Volume 0, Issue 0, Page 000, Latest Articles.
Abstract: Bayesian foraging in patchy environments requires that foragers have information about the distribution of resources among patches (prior information), either set by natural selection or learned from past experience. We test the hypothesis that bumblebee foragers can rapidly learn prior information from past experience in two very different experimental environments. In the high‐variance environment (patches of low and high quality), stochastic optimality models predicted that finding rewards should sometimes sharply increase an optima...
Source: The American Naturalist - July 8, 2009 Category: Zoology Tags: article Source Type: journals
Intersex gonads in frogs: understanding the time course of natural development and role of endocrine disruptors.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
We examined three species representing each of the differentiation rates (Bufo americanus=retarded rate; Hyla versicolor=basic rate; Rana sphenocephala=accelerated rate), to examine the natural time course of sexual development along with the influence of atrazine exposure. For each species, exposure to atrazine (1, 3, 10, 30 parts per billion), 17-beta-estradiol or control water occurred throughout larval life. Gonad histology was performed at 3-week intervals during the larval period or at a juvenile stage to examine the proportion of males, females, underdeveloped testes, testicular oocytes (TO; testes with 0-30% oocyte...
Source: Journal of Experimental Zoology. Part B. Molecular and Developmental Evolution - July 7, 2009 Category: Zoology Authors: Storrs-Méndez SI, Semlitsch RD Tags: J Exp Zoolog B Mol Dev Evol Source Type: journals
Whole body regeneration in a colonial ascidian, Botrylloides violaceus.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
We report the appearance of Piwi-positive cells in hemocytes surrounding the regenerates. We observed an increase of proliferating cell nuclear antigen (PCNA)-positive cells in circulatory hemocytes in late regenerates, and found double-labeled nuclear expression with Piwi in a subset of large circulatory cells. We rarely found Piwi or PCNA in differentiating tissues during vascular budding, suggesting that cells that form the epithelial tissues during budding and WBR originate mostly from circulatory hemocyte precursors. We propose that multiple stem cell types are circulating within B. violaceus and that they undergo pro...
Source: Journal of Experimental Zoology. Part B. Molecular and Developmental Evolution - July 7, 2009 Category: Zoology Authors: Brown FD, Keeling EL, Le AD, Swalla BJ Tags: J Exp Zoolog B Mol Dev Evol Source Type: journals
Related product :Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Les Fourmis by Luc Passera and Serge Aron
Source: Canadian Journal of Zoology - July 7, 2009 Category: Zoology Source Type: journals
Related product:Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
The Systematics of New World Clinocera Meigen by Bradley Sinclair [more]
Source: Canadian Journal of Zoology - July 7, 2009 Category: Zoology Source Type: journals
Caspase-dependent induction of apoptosis in barramundi, Lates calcarifer (Bloch), muscle cells by grouper iridovirusEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
We recently reported that grouper iridovirus (GIV) can induce apoptosis in barramundi, Lates calcarifer, muscle (BM) and swim bladder (BSB) cell lines. In this paper, we further characterize the molecular mechanism underlying apoptotic death in BM cells triggered by GIV. DNA-laddering and apoptotic cells were observed in BM cells infected with UV-irradiated or untreated GIV but was absent in cells infected with heat-inactivated GIV, indicating the involvement of viral protein in the apoptosis event. In GIV-infected BM cells, the conversion of procaspase-3 to caspase-3 was evident and the level of caspase-8 and -9 increased...
Source: Journal of Fish Diseases - July 6, 2009 Category: Zoology Authors: P P Chiou, Y-C Chen, Y-S Lai Source Type: journals
Comparison of the resistance of selected families of common carp, Cyprinus carpio L., to koi herpesvirus: preliminary studyEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Source: Journal of Fish Diseases - July 6, 2009 Category: Zoology Authors: P F Dixon, C L Joiner, K Way, R A Reese, G Jeney, Z Jeney Source Type: journals
Encoding geometric and non-geometric information: a study with evolved agents.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Vertebrate species use geometric information and non-geometric or featural cues to orient. Under some circumstances, when both geometric and non-geometric information are available, the geometric information overwhelms non-geometric cues (geometric primacy). In other cases, we observe the inverse tendency or the successful integration of both cues. In past years, modular explanations have been proposed for the geometric primacy: geometric and non-geometric information are processed separately, with the geometry module playing a dominant role. The modularity issue is related to the recent debate on the encoding of geome...
Source: Animal Cognition - July 6, 2009 Category: Zoology Authors: Ponticorvo M, Miglino O Tags: Anim Cogn Source Type: journals
The Evolution of Continuous Variation in Ejaculate Expenditure StrategyEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
The American Naturalist, Volume 0, Issue 0, Page 000, Latest Articles.
Abstract: Sperm competition theory has largely focused on the evolution of ejaculate expenditure strategies across different species or populations or across discrete mating roles on which sperm competition operates differentially. Few studies have considered the extent to which male ejaculate expenditure is influenced by continuous change in male phenotype within a population. Here we model how optimal ejaculate expenditure responds to two sources of continuous variation: (1) the quantity of resources allocated by a male to mating within a breedi...
Source: The American Naturalist - July 6, 2009 Category: Zoology Tags: article ‐Article Source Type: journals
Experimental Evidence for the Rapid Evolution of Behavioral Canalization in Natural PopulationsEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
The American Naturalist, Volume 0, Issue 0, Page 000, Latest Articles.
Abstract: Canalization—the evolutionary loss of the capacity of organisms to develop different phenotypes in different environments—is an evolutionary phenomenon suspected to occur widely, although examples in natural populations are elusive. Because behavior is typically a highly flexible component of an individual’s phenotype, it provides fertile ground for studying the evolution of canalization. Here we report how snail populations exposed for different lengths of time to a predatory crab introduced from Europe to America exhibit differen...
Source: The American Naturalist - July 6, 2009 Category: Zoology Tags: article Notes and Comments Source Type: journals
Mountain Gorillas. Biology, Conservation, and CoexistenceEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Source: Acta Zoologica - July 5, 2009 Category: Zoology Authors: John A. Nyakatura Source Type: journals
Behavioral response of migrating wood frogs to experimental timber harvest surrounding wetlandsEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Tracy A.G. Rittenhouse and Raymond D. Semlitsch - Behavioral responses to ecological disturbances such as timber harvest, fire, or drought provide insight into wildlife habitat requirements. To determine the behavioral response of adult...
Source: Canadian Journal of Zoology - July 5, 2009 Category: Zoology Source Type: journals
Holding ground in the face of invasion: native fence lizards (Sceloporus undulatus) do not alter their habitat use in response to introduced fire ants (Solenopsis invicta)Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
T. Langkilde - The introduction of non-native species is becoming increasingly common. Understanding the impact of invaders on native populations is critical for effective management. Red imported fire...
Source: Canadian Journal of Zoology - July 5, 2009 Category: Zoology Source Type: journals
Encapsulation ability: Are all Drosophila species equally armed? An investigation in the obscura groupEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
S. Havard, P. Eslin, G. Prévost, and G. Doury - Unable to form cellular capsules around large foreign bodies, the species Drosophila subobscura Collin in Gordon, 1936 was previously shown devoid of lamellocytes, the capsule-forming...
Source: Canadian Journal of Zoology - July 5, 2009 Category: Zoology Source Type: journals
Genetic diversity in a remnant population of lake trout (Salvelinus namaycush)Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Tina M.J. Giroux, Douglas P. Chivers, Michael J. Fitzsimmons, and Neil B. Chilton - Genetic diversity of the remnant population of lake trout (Salvelinus namaycush (Walbaum in Artedi, 1792)) in Crean Lake was compared with that for two other...
Source: Canadian Journal of Zoology - July 5, 2009 Category: Zoology Source Type: journals
Isolation of a novel strain of Bacillus pumilus from penaeid shrimp that is inhibitory against marine pathogens.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
A bacterium was isolated from the mid-gut of healthy black tiger shrimp, Penaeus monodon, based on a large zone of inhibition in mixed culture on solid medium. The isolate was a Gram-positive, motile spore former, with an optimum pH range for growth in tryptone soya broth containing 2% NaCl of between pH 6 and 9. The bacterium was highly salt tolerant with concentrations between 0% and 8% having no detrimental effect on growth. The isolate was identified as Bacillus pumilus based on physiological capabilities using the API50CHB and Biolog systems. Amplification and sequencing of the 16S rRNA gene followed by phylogenetic a...
Source: Journal of Fish Diseases - July 4, 2009 Category: Zoology Authors: J E Hill, J C F Baiano, A C Barnes Source Type: journals
Ultrastructural features of the process of wound healing after tail and limb amputation in lizardEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Alibardi, L. 2009. Ultrastructural features of the process of wound healing after tail and limb amputation in lizard.[mdash]Acta Zoologica (Stockholm)xx: 00[ndash]00 Wound healing and re-epitelization after amputation of tail and limb in lizard have been studied by electron microscopy to understand the cytological base of immunity to infection in this species. After 2 days post-amputation in both limb and tail stumps, numerous granulocytes are accumulated over the stump, and participate to the formation of the scab. Bacteria remain confined to the scab or are engulfed by leukocytes and migrating keratinocytes located under...
Source: Acta Zoologica - July 4, 2009 Category: Zoology Authors: L. Alibardi Source Type: journals
Landmark use by Clark's nutcrackers (Nucifraga columbiana): influence of disorientation and cue rotation on distance and direction estimates.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Many species have been shown to encode multiple sources of information to orient. To examine what kinds of information animals use to locate a goal we manipulated cue rotation, cue availability, and inertial orientation when the food-storing Clark's nutcracker (Nucifraga columbiana) was searching for a hidden goal in a circular arena. Three groups of birds were used, each with a different goal-landmark distance. As the distance between the goal and the landmark increased, nutcrackers were less accurate in finding the correct direction to the goal than they were at estimating the distance (Experiment 1). To further exam...
Source: Animal Cognition - July 4, 2009 Category: Zoology Authors: Kelly DM, Kamil AC, Cheng K Tags: Anim Cogn Source Type: journals
Effect of fixed-time embryo transfer on reproductive efficiency in high-producing repeat-breeder Holstein cows.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
In conclusion, the protocol for synchronization of time of ovulation using norgestomet ear implant, EB and eCG increased recipients transferred-to-treated and pregnancy rates in high-producing repeat-breeder Holstein cows. Also, recipients without CL at the beginning of the time of ovulation synchronization treatment resulted in similar pregnancy rate as recipients with CL submitted to FTET protocol. Thus, the suggested protocol allowed the performance of FTET, without the need for detection of estrus, simplifying the reproductive management and increasing the reproductive efficiency in repeat-breeder Holstein recipients.
...
Source: Animal Reproduction Science - July 4, 2009 Category: Zoology Authors: Rodrigues CA, Teixeira AA, Ferreira RM, Ayres H, Mancilha RF, Souza AH, Baruselli PS Tags: Anim Reprod Sci Source Type: journals
Effect of fetal size on fetal placental hyaluronan and hyaluronoglucosaminidases throughout gestation in the pig.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
The trophoblast-endometrial epithelial cell bilayer of porcine placenta undergoes microscopic folding during gestation, and the folded bilayer is embedded in fetal placental stroma. We hypothesized that hyaluronan was a component of fetal placental stroma, and that hyaluronoglucosaminidases played a role in bilayer folding. Gilts were unilaterally hysterectomized-ovariectomized (UHO) at 160 days of age, mated at estrus and killed on days 25, 45, 65, 85 or 105 of gestation. Fetal placental tissues were collected to evaluate hyaluronan and hyaluronoglucosaminidase content. Fetal placental hyaluronan concentration increas...
Source: Animal Reproduction Science - July 4, 2009 Category: Zoology Authors: Vallet JL, Miles JR, Freking BA Tags: Anim Reprod Sci Source Type: journals
Hemoglobin Genotype Has Minimal Influence on the Physiological Response of Juvenile Atlantic Cod (Gadus morhua) to Environmental ChallengesEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Physiological and Biochemical Zoology, Volume 0, Issue 0, Page 000, Latest Articles.
Abstract Hemoglobin (Hb) polymorphism in cod is associated with temperature‐related differences in biogeographical distribution, and several authors have suggested that functional characteristics of the various hemoglobin isoforms (HbIs) directly influence phenotypic traits such as growth rate. However, no study has directly examined whether Hb genotype translates into physiological differences at the whole animal level. Thus, we generated a family of juvenile Atlantic cod consisting of all three main Hb genotypes (HbI‐1/1, HbI...
Source: Physiological and Biochemical Zoology - July 2, 2009 Category: Zoology Tags: article Source Type: journals
Source levels and communication-range models for harp seal (Pagophilus groenlandicus) underwater calls in the Gulf of St. Lawrence, CanadaEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
M. A. Rossong and J. M. Terhune - Harp seals (Pagophilus groenlandicus (Erxleben, 1777)) produce underwater call types during the breeding season that are thought to be important for reproductive behaviours and herd...
Source: Canadian Journal of Zoology - July 1, 2009 Category: Zoology Source Type: journals
Sensible Heat Loss from Muskoxen (Ovibos moschatus) Feeding in Winter: Small Calves Are Not at a Thermal Disadvantage Compared with Adult CowsEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Physiological and Biochemical Zoology, Volume 0, Issue 0, Page 000, Latest Articles.
Abstract Muskoxen (Ovibos moschatus) are large (>200 kg adult body mass) mammalian herbivores that overwinter in the polar regions. Calves are around one‐third the body mass of mature females and may be expected to suffer greater thermal stresses in winter compared with adults because the ratio of surface area to volume (SA:vol) is much greater for calves than for adults. We found that during feeding bouts, when animals are fully exposed to environmental conditions, calves did lose sensible (dry) heat more readily than adults (W m...
Source: Physiological and Biochemical Zoology - July 1, 2009 Category: Zoology Tags: article Source Type: journals
Effects of temperature on disease progression and swimming stamina in Ichthyophonus-infected rainbow trout, Oncorhynchus mykiss (Walbaum)Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
This study helps explain field observations showing the recent emergence of clinical ichthyophoniasis in Yukon River Chinook salmon later in their spawning migration when water temperatures were high, as well as the apparent failure of a substantial percentage of infected fish to successfully reach their natal spawning areas.
Source: Journal of Fish Diseases - June 30, 2009 Category: Zoology Authors: R Kocan, P Hershberger, G Sanders, J Winton Source Type: journals
How do wild baboons (Papio ursinus) plan their routes? Travel among multiple high-quality food sources with inter-group competition.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
We examined how a group of wild chacma baboons travelled among multiple, simultaneously fruiting mountain fig trees (Ficus glumosa). In the course of a 16-month study, this highly preferred fruit was available during a 3-week period, from relatively few sites, which were also utilized by four larger baboon groups. We used directness of route and travel speed of 13 days of observation, and approach rates of 31 days of observation to differentiate between purposeful and opportunistic encounters with 50 fig trees. The study group visited a total of 30 fig trees overall, but only 8 trees per day on average. Each morning, they ...
Source: Animal Cognition - June 30, 2009 Category: Zoology Authors: Noser R, Byrne RW Tags: Anim Cogn Source Type: journals
Developmental changes in the expression of creatine synthesizing enzymes and creatine transporter in a precocial rodent, the spiny mouseEmail this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Conclusions:
Our results suggest that in the spiny mouse, a species where, like the human, considerable organogenesis occurs before birth, there appears to be a limited capacity for endogenous creatine synthesis until approximately 0.9 of pregnancy. This implies that a maternal source of creatine, transferred across the placenta, may be essential until the creatine synthesis and transport system matures in preparation for birth. If these results also apply to the human, premature birth may increase the risk of creatine deficiency.
Source: BMC Developmental Biology - Latest articles - June 30, 2009 Category: Zoology Authors: Zoe IrelandAaron RussellTheo WallimannDavid WalkerRod Snow Source Type: journals
In vitro production of haploid sperm cells from male germ cells of foetal cattle.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
The purpose of this study was to isolate the foetal cattle male germ cells (mGCs) and then induce them into sperm cells. The mGCs were purified and enriched by a two-step plating method based on the different adherence velocities of mGCs and somatic cells. The percentage of the vasa and the c-kit positive cells were 95.34+/-2.25% and 53.3+/-1.03% by using flow cytometry analysis (FCA), respectively. In feeder-free culture system, the half-suspending cells appeared and formed a 16-cell rosary in medium after the mGCs were cultured for 6-8 days. On immunocytochemical staining during the second passage, some single cells ...
Source: Animal Reproduction Science - June 30, 2009 Category: Zoology Authors: Dong WZ, Hua JL, Shen WZ, Dou ZY Tags: Anim Reprod Sci Source Type: journals
Purification and Classification of Three Lipovitellin Subtypes in the Marbled Sole (Pleuronectes yokohamae).Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
An immunologlcal analysis using subtype-specific antisera of the major yolk protein lipovltellin (Lv) of the grey mullet (Mugil cephalus) confirmed the presence of the three corresponding Lv subtypes (LvA, LvB, and LvC) in vitellogenic ovaries of the marbled sole (Pleuronectes yokohamae). These three Lv subtypes were purified from sole ovaries by using various combinations of anion exchange, hydroxylapatite, immunoadsorbent, and gel-filtration chromatography. Purified LvA, LvB, and LvC had an apparent native mass of approximately 482, approximately 380, and approximately 372 kDa, respectively, estimated by gel filtrati...
Source: Zoological Science - June 30, 2009 Category: Zoology Authors: Amano H, Fujita T, Hiramatsu N, Todo T, Hara A Tags: Zoolog Sci Source Type: journals
Molecular Phylogeny and Genetic Identification of Populations of Two Species of Feirana Frogs (Amphibia: Anura, Ranidae, Dicroglossinae, Paini) Endemic to China.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Using mitochondrial 12S rRNA, 16S rRNA, and ND2 sequences, we investigated phylogenetic relationships among populations of two frog species endemic to China, both referred to the genus Feirana. A sister-group relationship between the two species was supported moderately in a maximum likelihood analysis and significantly in a Bayesian analysis, but not in a maximum parsimony analysis, of combined data for the three genes. Pending resolution of this incongruence, we provisionally maintain these species in the genus Feirana. Two major clades with a deep divergence are concordant with the species F. quadranus and "F." taih...
Source: Zoological Science - June 30, 2009 Category: Zoology Authors: Wang B, Jiang J, Xie F, Chen X, Dubois A, Liang G, Wagner S Tags: Zoolog Sci Source Type: journals
Cuticle Formation in Quail Eggs.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
The present study was conducted to determine both the site at which cuticle materials are produced and the critical period for their production in the oviductal uterus of the Japanese quail, Coturnix japonica. An antiserum was produced against the 32-kDa band in electrophoretic profiles of cuticle materials obtained from eggshells decalcified with EDTA. Immunofluorescence and immunoelectron microscopic observations revealed that the 32-kDa protein was synthesized in luminal ciliated epithelial cells of the uterus until 21 h after the previous oviposition (the first phase) and then secreted during the 4 h before the nex...
Source: Zoological Science - June 30, 2009 Category: Zoology Authors: Rahman MA, Moriyama A, Iwasawa A, Yoshizaki N Tags: Zoolog Sci Source Type: journals
Ontogeny of the Plastron of the Giant Amazon River Turtle, Podocnemis expanse (Schweigger, 1812) (Testudines, Podocnemididae).Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
We examined several stages of pre- and post- hatching development in embryos and hatchlings collected starting from day 18 of natural incubation. Embryos and hatchlings were cleared and double stained for cartilage and bone. The epiplastron, endoplastron, hyoplastron, hypoplastron, xiphiplastron, and mesoplastron bones form the complete plastron of this turtle. In stage 16, bone centers become visible in most of the bones of the plastron. Alizarin Red stain retention indicated that the sequence of bone ossification is as follows: first the hyoplastron and the hypoplastron, then the endoplastron followed by the xiphiplastro...
Source: Zoological Science - June 30, 2009 Category: Zoology Authors: Gonçalves Vieira L, Quagliatto Santos AL, Campos Lima F, Souza Pinto JG Tags: Zoolog Sci Source Type: journals
Regulation of Embryogenesis by Light and Its Ecological Significance in the Asian Tadpole Shrimp Triops granarius.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Triops granarius (Lucas) (Notostraca: Triopsidae) lives In paddy fields from the Kanto district to northern Kyushu, Japan. Changes in the size distribution of this species were examined in the paddy fields and then the effect of light on hatching was examined under quasi-natural and laboratory conditions. Adult tadpole shrimps were found about one week after irrigation and plowing in two paddy fields in Sakai, Japan. They developed rapidly and disappeared altogether about one month later. Under conditions of natural daylength and temperature, eggs laid in the soil did not hatch without being removed from the soil. Unde...
Source: Zoological Science - June 30, 2009 Category: Zoology Authors: Horiguchi T, Ito C, Numata H Tags: Zoolog Sci Source Type: journals
Effects of Salinity on the Survival, Growth, Development, and Metamorphosis of Fejervarya limnocharis Tadpoles Living in Brackish Water.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
We studied salinity tolerance and the effects of salinity on growth, development, and metamorphosis in Fejervarya limnocharis tadpoles living in brackish water. Specifically, we examined whether tadpoles exhibit adaptive plasticity in development when exposed to different salinities. Tadpoles collected on Green and Orchid Islands off Southeastern Taiwan were assigned to salinities of 0, 3, 5, 7, 9, 11, and 13 parts per thousand (ppt). The daily survival, weekly growth, and development of tadpoles were recorded until metamorphosis. More than 50% of tadpoles survived in 9 ppt for over a month, and a few individuals survi...
Source: Zoological Science - June 30, 2009 Category: Zoology Authors: Wu CS, Kam YC Tags: Zoolog Sci Source Type: journals
Species Delimitation and Historical Biogeography in the Genus Helice (Brachyura: Varunidae) in the Northwestern Pacific.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
The genus Helice is comprised of four species, H. formosensis, H. latimera, H. tientsinensis, and H. tridens. A recent molecular analysis identified H. formosensis and H. tientsinensis as junior synonyms of H. latimera. We used three mitochondrial and two nuclear genes to further delineate species boundaries in Helice and to add to knowledge of the historical biogeography of the genus. The molecular data revealed deep divergences between the H. formosensis-latimera-tientsinensis complex and H. tridens. Clear genetic separations with incomplete lineage sorting and convincing morphological divergences were detected among...
Source: Zoological Science - June 30, 2009 Category: Zoology Authors: Yin W, Fu C, Guo L, He Q, Li J, Jin B, Wu Q, Li B Tags: Zoolog Sci Source Type: journals
Genetic Diversity of the Japanese Marten (Martes melampus) and Its Implications for the Conservation Unit.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Molecular phylogenetic analyses of combined mitochondrial DNA sequences (2814 bp; cytochrome b gene, displacement loop region, and NADH dehydrogenase subunit 2 gene) identified nine groups among 49 individual Japanese martens, Martes melampus, collected from several areas in Japan. The grouping was not correlated with winter coat color, but was consistent with geography. In particular, the monophyly of 29 Tsushima martens, M. m. tsuensis, was supported by strong clade support and topological tests. Haplotype and nucleotide diversities were much lower for the Tsushima population than for any population on the Japanese m...
Source: Zoological Science - June 30, 2009 Category: Zoology Authors: Sato JJ, Yasuda SP, Hosoda T Tags: Zoolog Sci Source Type: journals
Huge Symbiotic Organs in Giant Scale Insects of the Genus Drosicha (Coccoidea: Monophlebidae) Harbor Flavobacterial and Enterobacterial Endosymbionts.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Giant scale insects (Drosicha: Coccoldea: Monophlebidae) were investigated for their symbiotic organs and bacterial endosymbionts. Two types of bacterial 16S rRNA gene sequences, flavobacterial and enterobacterial, were consistently detected in D.corpulenta and D.pinicola. The former sequences formed a compact clade in the Bacteroidetes, allied to the symbionts of cushion and armored scales. The latter sequences formed a robust clade in the gamma-Proteobacteria, allied to enteric bacteria like Enterobacter aerogenes and Escherichia coli. Another type of 16S sequence derived from Wolbachia was also detected in D.pinicol...
Source: Zoological Science - June 30, 2009 Category: Zoology Authors: Matsuura Y, Koga R, Nikoh N, Meng XY, Hanada S, Fukatsu T Tags: Zoolog Sci Source Type: journals
Antipredator Behavior of the Freshwater Microturbellarian Stenostomum sphagnetorum Against the Predatory Ciliate Dileptus margaritifer.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
This study investigated defensive behavior by the microturbellarian Stenostomum sphagnetorum against the predatory ciliate Dileptus margaritifer. When S. sphagnetorum was attacked by D. margaritifer, the microturbellarian released a mass of mucous material from the site of attack and swam away, while D. margaritifer ingested the released material. If the attack was repeated, S. sphagnetorum was killed and eaten by the predator. Observations on the predator-prey interactions between these two organisms suggest that the discharge of mucous material by S. sphagnetorum is the main component of defensive behavior. The following...
Source: Zoological Science - June 30, 2009 Category: Zoology Authors: Buonanno F Tags: Zoolog Sci Source Type: journals
How great is great ape foresight?Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Osvath and Osvath (Anim Cogn 11: 661-674, 2008) report innovative studies with two chimpanzees and one orangutan that suggest some capacity to select and keep a tool for use about an hour later. This is a welcome contribution to a small, but rapidly growing, field. Here we point out some of the weaknesses in the current data and caution the interpretation the authors advance. It is not clear to what extent the apes really engaged in any foresight in these studies.
PMID: 19565281 [PubMed - as supplied by publisher]
Source: Animal Cognition - June 29, 2009 Category: Zoology Authors: Suddendorf T, Corballis MC, Collier-Baker E Tags: Anim Cogn Source Type: journals
Habitat adaptation rather than genetic distance correlates with female preference in fire salamanders (Salamandra salamandra)Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
Conclusions:
A comparative analysis of our data showed that habitat adaptation rather than neutral genetic distance correlates with female preference in these salamanders, and that habitat-dependent female preference of a specific pond-reproducing population may have been lost during adaptation to the novel environmental conditions of ponds.
Source: Frontiers in Zoology - June 28, 2009 Category: Zoology Authors: Barbara CaspersClaudia JungeMarkus WeitereSebastian Steinfartz Source Type: journals
Short- and long-term effects of lipopolysaccharide-induced inflammation on rabbit sperm quality.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
The objectives of this study were (1) to provide a suitable animal model of a sub-acute inflammatory state by intraperitoneally inoculating bacterial lipopolysaccharides (LPS) and (2) to define the short- and long-term effects of this state on the sperm quality of rabbit bucks. Two series of experiments were performed to accomplish these objectives. In experiment 1, 15 healthy New Zealand White rabbit bucks were divided into five homogeneous groups, receiving 25, 50, 100 and 150mug/kg body weight (b.w.) of E. coli LPS dissolved in 2ml of sterile saline or only saline (control), respectively. White blood cells (WBC), rectal...
Source: Animal Reproduction Science - June 26, 2009 Category: Zoology Authors: Brecchia G, Cardinali R, Mourvaki E, Collodel G, Moretti E, Dal Bosco A, Castellini C Tags: Anim Reprod Sci Source Type: journals
Normal development following chromatin transfer correlates with donor cell initial epigenetic state.Email this article to a colleague.
Save this article to My Clippings.
Discuss or comment on this article.
In this study, we provide preliminary evidence that the epigenetic state of the donor cell, may be valuable in assessing potential cloning success. We have measured key indicators of cellular epigenetic state in both serially derived cell populations of the same genetic origin, but differing in epigenomic status, and in a distinct cohort of donor cell populations with diverse genetic origins and epigenomic status. Specifically, the relative abundance of particular histone modifications in donor populations prior to manipulation has been correlated with the measurable variance in reprogramming efficiencies observed followin...
Source: Animal Reproduction Science - June 26, 2009 Category: Zoology Authors: McLean CA, Wang Z, Babu K, Edwards A, Kasinathan P, Robl J, Sheppard AM Tags: Anim Reprod Sci Source Type: journals
