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This page shows you the most recent publications within this specialty of the MedWorm directory. This is page number 19.

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A phylogeny and timescale for the living genera of kangaroos and kin (Macropodiformes : Marsupialia) based on nuclear DNA sequencesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Robert W. Meredith, Michael Westerman, Mark S. Springer - Volume 56(6)
Source: Australian Journal of Zoology - March 12, 2009 Category: Zoology Source Type: journals

Global comparative transcriptome analysis of cartilage formation in vivoEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Conclusions: These data represent the first global gene expression profiling analysis of chondrogenic tissues during in vivo development. They identify genes for further study on their functional roles in chondrogenesis, and provide a comprehensive and important resource for future studies on cartilage development and disease.
Source: BMC Developmental Biology - Latest articles - March 10, 2009 Category: Zoology Authors: Trevor L Cameron, Daniele Belluoccio, Peter G Farlie, Bent Brachvogel and John F Bateman Source Type: journals

Dynamics of heparin-binding proteins on boar sperm.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The presence, topology and dynamics of heparin-binding proteins (HBP) on boar sperm were evaluated. HBP distribution was analyzed by subcellular parting, using biotinylated heparin followed by colorimetric detection. HBP were detected as peripherical and integral periacrosomal membrane proteins. Indirect fluorescence microscopy of sperm incubated with biotinylated heparin was used to evidence heparin binding on sperm at different physiological stages. Two different fluorescent patterns (A and B) were found, which probably correspond to non-capacitated and capacitated sperm as assessed by the ability to undergo acrosome...
Source: Animal Reproduction Science - March 9, 2009 Category: Zoology Authors: Dapino DG, Teijeiro JM, Cabada MO, Marini PE Tags: Anim Reprod Sci Source Type: journals

Karyoplast exchange between strontium- and 6-DMAP-parthenogenetically activated zygotes of cattle.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, karyoplast exchange between parthenogenetic zygotes activated with strontium and 6-DMAP can lead to nuclear-cytoplasmic incompatibilities and affect embryonic development to the eight-cell and blastocyst stages. PMID: 19327922 [PubMed - as supplied by publisher]
Source: Animal Reproduction Science - March 9, 2009 Category: Zoology Authors: Méo SC, Ferreira CR, Perecin F, Saraiva NZ, Tetzner TA, Yamazaki W, Leal CL, Meirelles FV, Garcia JM Tags: Anim Reprod Sci Source Type: journals

Endothelial and inducible nitric oxide synthases in oocytes of cattle.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, isoforms of NOS (eNOS and iNOS) are present in oocytes of cattle from early folliculogenesis up to maturation; in vitro maturation influences amount of mRNA and NOS activity. PMID: 19327921 [PubMed - as supplied by publisher]
Source: Animal Reproduction Science - March 9, 2009 Category: Zoology Authors: Pires PR, Santos NP, Adona PR, Natori MM, Schwarz KR, de Bem TH, Leal CL Tags: Anim Reprod Sci Source Type: journals

Evaluation of anesthetic protocol for the collection of semen from captive collared peccaries (Tayassu tajacu) by electroejaculation.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, use of propofol for anesthetic restraint of collared peccaries enhanced collection of semen by electroejaculation. PMID: 19327920 [PubMed - as supplied by publisher]
Source: Animal Reproduction Science - March 9, 2009 Category: Zoology Authors: Souza AL, Castelo TS, Queiroz JP, Barros IO, Paula VV, Oliveira MF, Silva AR Tags: Anim Reprod Sci Source Type: journals

Altitudinal gradient of Eurasian otter (Lutra lutra) food niche in Mediterranean habitatsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Luigi Remonti, Alessandro Balestrieri, and Claudio Prigioni - The effects of geographical factors, such as latitude and altitude, on climate are known to influence the food habits of predator species distributed over a...
Source: Canadian Journal of Zoology - March 7, 2009 Category: Zoology Source Type: journals

Transportation of Pacific salmon carcasses from streams to riparian forests by bearsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Thomas P. Quinn, Stephanie M. Carlson, Scott M. Gende, and Harry B. Rich, Jr. - Predation on Pacific salmon by bears (genus Ursus L., 1758) can be an important ecosystem process because the spatial distribution of carcasses largely determines whether...
Source: Canadian Journal of Zoology - March 5, 2009 Category: Zoology Source Type: journals

Ambient temperature and annual timing affect torpor bouts and euthermic phases of hibernating European ground squirrels (Spermophilus citellus)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
István Németh, Viktor Nyitrai, and Vilmos Altbäcker - The low body temperature state of hibernating mammals is interrupted regularly by short euthermic phases. The frequency of these euthermic phases changes according to the...
Source: Canadian Journal of Zoology - March 5, 2009 Category: Zoology Source Type: journals

Molecular systematics of the genus Sigmodon: results from mitochondrial and nuclear gene sequencesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Dallas D. Henson and Robert D. Bradley - Phylogenetic relationships within the genus Sigmodon Say and Ord, 1825 were examined using sequence data from multiple gene regions, including exon 1 of the nuclear-encoded...
Source: Canadian Journal of Zoology - March 5, 2009 Category: Zoology Source Type: journals

Growth and ionoregulatory ontogeny of wild and hatchery-raised juvenile pink salmon (Oncorhynchus gorbuscha)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A. Grant, M. Gardner, L. Nendick, M. Sackville, A. P. Farrell, and C. J. Brauner - Juvenile pink salmon (Oncorhynchus gorbuscha (Walbaum, 1792)) enter seawater (SW) shortly following emergence. Little is known about growth and development during this life-history stage when...
Source: Canadian Journal of Zoology - March 5, 2009 Category: Zoology Source Type: journals

Ecological correlates of trophic polyphenism in spadefoot tadpoles inhabiting playasEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
D. M. Ghioca-Robrecht, L. M. Smith, and L. D. Densmore - Polyphenism in larval amphibians has been related to several factors, including wetland hydroperiod, food availability, competition, and predation. Spadefoot toads (genus Spea Cope, 1866) often...
Source: Canadian Journal of Zoology - March 5, 2009 Category: Zoology Source Type: journals

Ambient temperature is more important than food availability in explaining reproductive timing of the bat Sturnira lilium (Mammalia: Chiroptera) in a montane Atlantic ForestEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
M.A.R. Mello, E.K.V. Kalko, and W.R. Silva - Reproduction of bats is determined by a suite of endogenous and exogenous factors. Among exogenous influences, special attention has been given to the influence of...
Source: Canadian Journal of Zoology - March 5, 2009 Category: Zoology Source Type: journals

Do interlinks between geography and ecology explain the latitudinal diversity patterns in Sciuridae? An approach at the genus levelEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Giovanni Amori, Spartaco Gippoliti, Luca Luiselli, and Corrado Battisti - The latitudinal gradient theory explains the uneven distribution of taxa richness across the world. We explore this theory using genera of Sciuridae (Mammalia: Rodentia). Distribution...
Source: Canadian Journal of Zoology - March 5, 2009 Category: Zoology Source Type: journals

Ontogenetic and sexual differences in diet in an actively foraging snake, Thamnophis proximusEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
N. B. Ford and P. M. Hampton - Actively foraging species of snakes often consume large numbers of small prey, which creates a high meal to snake mass ratio. Because they may also...
Source: Canadian Journal of Zoology - March 5, 2009 Category: Zoology Source Type: journals

Natal dispersal and social organization of the swamp antechinus (Antechinus minimus) in a high-density island populationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
M. G. Sale, F.J.L. Kraaijeveld-Smit, and J.P.Y. Arnould - Radiotelemetry, mark - recapture trapping, and microsatellite analysis of genetic variation among three subpopulations were used to investigate the natal dispersal patterns, genetic structure, and social organization...
Source: Canadian Journal of Zoology - March 5, 2009 Category: Zoology Source Type: journals

Wintering strategies by mountain goats in interior mountainsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Kim G. Poole, Kari Stuart-Smith, and Irene E. Teske - As with many ungulates inhabiting areas with potentially deep snow, winter is an important season for mountain goats (Oreamnos americanus (de Blainville, 1816)) and is...
Source: Canadian Journal of Zoology - March 5, 2009 Category: Zoology Source Type: journals

Ecophysiological Influence on Scaling of Aerobic and Anaerobic Metabolism of Pelagic Gonatid SquidsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We examined the oxygen consumption rates and activity levels of respiratory enzymes involved in the aerobic (citrate synthase [CS]) and anaerobic (octopine dehydrogenase [ODH]) metabolism of gonatid squids (Gonatus onyx and Gonatus pyrus) as a function of body size. The energy expenditure rates of gonatids (ranging from 2.51 to 8.79 μmol O2 g−1 h−1 at 5°C) are among the highest in Animalia when mass and temperature are taken into account. They reflect the low efficiency of jet propulsion and the animals' active life strategy as diel vertical migrants in the pelagic environment. Both metabolic rate and aerobic muscle ...
Source: Physiological and Biochemical Zoology - March 5, 2009 Category: Zoology Tags: article Source Type: journals

Spatial memory in the grey mouse lemur (Microcebus murinus).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Wild animals face the challenge of locating feeding sites distributed across broad spatial and temporal scales. Spatial memory allows animals to find a goal, such as a productive feeding patch, even when there are no goal-specific sensory cues available. Because there is little experimental information on learning and memory capabilities in free-ranging primates, the aim of this study was to test whether grey mouse lemurs (Microcebus murinus), as short-term dietary specialists, rely on spatial memory in relocating productive feeding sites. In addition, we asked what kind of spatial representation might underlie their o...
Source: Animal Cognition - March 5, 2009 Category: Zoology Authors: Lührs ML, Dammhahn M, Kappeler PM, Fichtel C Tags: Anim Cogn Source Type: journals

Renin and ovarian vascularization in cows with follicular cysts after epidural administration of a GnRH analogue.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study was performed with 60 Friesian cows, which were diagnosed with follicular cysts, and randomly allocated into two groups: group A (treatment; n=30) received 2ml of lecirelin (Dalmarelin((R)) - Fatro), per head via sacro-coccygeal epidural, and group B (control; n=30) received 2ml saline solution (0.9% NaCl) per head by the same route. Blood samples were immediately collected prior to administration (T0) and then 24h (T1), 48h (T2) and 8 days (T3) after administration of the treatment, for both groups. Ovarian vascularization was evaluated utilizing Power Doppler on these same days in 10 animals from each group. T...
Source: Animal Reproduction Science - March 5, 2009 Category: Zoology Authors: Rizzo A, Minoia G, Trisolini C, Mutinati M, Spedicato M, Manca R, Sciorsci RL Tags: Anim Reprod Sci Source Type: journals

Chimpanzees (Pan troglodytes) do not develop contingent reciprocity in an experimental task.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, we evaluated whether chimpanzees would be more likely to provide food to a social partner from their home group if their partner had previously provided food for them. The chimpanzees manipulated a barpull apparatus in which actors could deliver rewards either to themselves and their partners or only to themselves. Our findings indicate that the chimpanzees' responses were not consistently influenced by the behavior of their partners in previous rounds. Only one of the 11 dyads that we tested demonstrated positive reciprocity. We conclude that contingent reciprocity does not spontaneously arise in experiment...
Source: Animal Cognition - March 4, 2009 Category: Zoology Authors: Brosnan SF, Silk JB, Henrich J, Mareno MC, Lambeth SP, Schapiro SJ Tags: Anim Cogn Source Type: journals

Sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis of ram seminal plasma proteins and their correlation with semen characteristics.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The present study was conducted to investigate fertility-associated proteins in ram seminal plasma and the correlation between specific protein and semen characteristics in sheep. Thirty-eight German merino sheep clinically proven healthy were chosen and divided into three groups according to fertility. Ejaculates were collected by an artificial vagina and semen characteristics (volume, pH value, motility, viability and concentration) were recorded. Seminal plasma was harvested by centrifugation and then subjected to SDS-polyacrylamide gel electrophoresis (SDS-PAGE) analysis in parallel with molecular weight standards....
Source: Animal Reproduction Science - March 3, 2009 Category: Zoology Authors: Yue W, Shi L, Bai Z, Ren Y, Zhao Y Tags: Anim Reprod Sci Source Type: journals

Characterization of seasonal reproduction patterns in female pichis Zaedyus pichiy (Xenarthra: Dasypodidae) estimated by fecal sex steroid metabolites and ovarian histology.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study aimed at characterizing the seasonal reproductive pattern of female pichis Zaedyus pichiy, a threatened small armadillo native to arid regions of Argentina and Chile, through direct observations, histological studies, and by measuring fecal immunoreactive estrogens, progestagens and glucocorticoids in 10 wild-born, captive pichis and in free-ranging individuals. Results suggest that pichis are seasonal breeders that give birth to one yearly litter of 1-2 offspring, which do not leave the burrow until they are weaned at approximately 37 days. Ovarian follicular growth seems to occur throughout the year. Fecal pro...
Source: Animal Reproduction Science - March 3, 2009 Category: Zoology Authors: Superina M, Carreño N, Jahn GA Tags: Anim Reprod Sci Source Type: journals

Hollow-using vertebrate fauna of Tasmania: distribution, hollow requirements and conservation statusEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Amelia J. Koch, Sarah A. Munks, Eric J. Woehler - Volume 56(5)
Source: Australian Journal of Zoology - March 2, 2009 Category: Zoology Source Type: journals

Is body shape of varanid lizards linked with retreat choice?Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Graham G. Thompson, Christofer J. Clemente, Philip C. Withers, Bryan G. Fry, Janette A. Norman - Volume 56(5)
Source: Australian Journal of Zoology - March 2, 2009 Category: Zoology Source Type: journals

A new species of leptolalax (amphibia, anura, megophryidae) from peninsular malaysia.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A new megophryid species, Leptolalax kecil, is described from the Cameron Highlands of Peninsular Malaysia on the basis of acoustic and morphological characteristics. It has an advertisement call dissimilar to that of other, congeneric species, and is the smallest of the known Leptolalax. It is similar to L. pluvialis from Vietnam in small body size, but differs from it in ventral color, and in the size and color of the pectoral gland. The distributional pattern of the new species Is discussed. PMID: 19341347 [PubMed - in process]
Source: Zoological Science - March 1, 2009 Category: Zoology Authors: Matsui M, Belabut DM, Ahmad N, Yong HS Tags: Zoolog Sci Source Type: journals

High hydrostatic pressure tolerance of four different anhydrobiotic animal species.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, HHP tolerance of four species of invertebrate anhydrobiotes (the tardigrade Milnesium tardigradum, a nematode species in the family Plectidae, larvae of Polypedilum vanderplanki, and cysts of Artemia franciscana), which have the potential to enter anhydrobiosis upon desiccation, were investigated by exposing them to 1.2 GPa for 20 minutes. This exposure killed the anhydrobiotes in their ordinary hydrated state, but did not affect their survival in the anhydrobiotic state. The results indicated that the hydrated anhydrobiotes were vulnerable to HHP, but that HHP of 1.2 GPa was not sufficient to kill them in a...
Source: Zoological Science - March 1, 2009 Category: Zoology Authors: Horikawa DD, Iwata K, Kawai K, Koseki S, Okuda T, Yamamoto K Tags: Zoolog Sci Source Type: journals

Morphological Characterization of Neurons Projecting to the Ring Gland in the Larval Blow Fly, Protophormia terraenovae.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The cephalic neuroendocrine system of the larval blow fly, Protophormia terraenovae was studied by backfills using either horseradish peroxidase or NiCl2, and peptide immunocytochemistry. Backfills through a proximal part of the ring gland mainly revealed three groups of neurons: (1) neurons with somata in the pars intercerebrails (PI) of the protocerebrum, (2) neurons with somata in the pars lateralis (PL) of the protocerebrum, and (3) neurons with somata in the subesophageal ganglion (SEG). Dense arborization was found mainly in the superior protocerebral, tritocerebral and SEG neuropils. Backfills through a distal p...
Source: Zoological Science - March 1, 2009 Category: Zoology Authors: Hamanaka Y, Tanaka S, Numata H, Shiga S Tags: Zoolog Sci Source Type: journals

Molecular Cloning of cDNAs Encoding Antimicrobial Peptide Precursors from the Skin of the Chinese Brown Frog, Rana chensinensis.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Skin plays a key role in the daily survival of amphibians. In the present study, six cDNAs encoding amphibian skin antimicrobial peptide precursors from the Chinese brown frog Rana chensinensis, were cloned and identified as preprobrevinin-1CEc, preprobrevinin-1CEb, preprotemporin-1CEa, preprotemporin-1CEb, preprotemporin-1CEc, and preprochensinin-1. Preprotemporin-1CEa, CEb, and CEc are members of the temporin family, which are usually short, hydrophobic, and C-terminally alpha-amidated antimicrobial peptides. Preprobrevinin-1CEa and CEb were identified as members of the brevinin-1 family of antimicrobial peptides, be...
Source: Zoological Science - March 1, 2009 Category: Zoology Authors: Shang D, Yu F, Li J, Zheng J, Zhang L, Li Y Tags: Zoolog Sci Source Type: journals

The Salivary Gland Chromosomes of the Himalayan Black Fly Simulium (Simulium) dentatum (Diptera: Simuliidae).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Proper identification of the black files is facilitated by chromosomal characteristics when morphotaxonomic parameters are Insufficient to distinguish a species. Using photo composites, we constructed and describe from the salivary glands of larvae a standard polytene chromosome map of a Himalayan black fly, Simulium (Simulium) dentatum, in the multistriatum group (Diptera: Simuliidae). This species has three metacentric polytene chromosomes (n=3), with homologues more or less Intimately paired and having a prominent centromere. The largest chromosome (I) was 40.55% of total complementary length (TCL); chromosomes II a...
Source: Zoological Science - March 1, 2009 Category: Zoology Authors: Henry W, Dey SK, Varma R Tags: Zoolog Sci Source Type: journals

Genetic Connectivity in the Broadcast-Spawning Coral Acropora digitifera Analyzed by Microsatellite Markers on the Sekisei Reef, Southwestern Japan.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Worldwide decline has been observed in coral populations due to environmental changes at both regional and global levels. Since corals have a typical metapopulation structure, the recovery of severely disturbed local populations depends on larval recruitment from outside the disturbed region. Therefore, the connectivity among local populations may play a key role in the disturbance/ recovery dynamics of coral populations. On the basis of the simulation of surface currents, derived from ocean currents, we hypothesized that the genetic connectivity of coral populations is weak between the northern and southern regions of...
Source: Zoological Science - March 1, 2009 Category: Zoology Authors: Nakajima Y, Nishikawa A, Isomura N, Iguchi A, Sakai K Tags: Zoolog Sci Source Type: journals

Molecular Cloning and Expression Analysis of a GnRH-Like Dodecapeptide in the Swordtip Squid, Loligo edulis.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study is the first report of GnRH cDNA cloning in squid and the third in non-chordates. PMID: 19341341 [PubMed - in process]
Source: Zoological Science - March 1, 2009 Category: Zoology Authors: Onitsuka C, Yamaguchi A, Kanamaru H, Oikawa S, Takeda T, Matsuyama M Tags: Zoolog Sci Source Type: journals

Deforestation and the structure of frog communities in the humedale terraba-sierpe, costa rica.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Loss of tropical forests is a major cause of biodiversity loss worldwide. Although drastic modification of the habitat has been shown to negatively affect amphibians, we are far from a complete understanding of the response of amphibian communities to deforestation. We studied frog assemblages in a gradient of forest modification in a humid area of Costa Rica, where the primary forest has been partially converted into pasture. The study area is a mosaic of primary palm forest, abandoned pasture covered by secondary forest, and pasture. Species richness was assessed by randomized walk surveys and audio strip transects. ...
Source: Zoological Science - March 1, 2009 Category: Zoology Authors: Furlani D, Francesco Ficetola G, Colombo G, Ugurlucan M, De Bernardi F Tags: Zoolog Sci Source Type: journals

Fitness Consequences of Reciprocally Asymmetric Hybridization between Simultaneous Hermaphrodites.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Depending on fitness consequences, hybridization may rescue Inbred populations; generate premating barriers, reproductive Interference, or hybrid species; or extinguish a species. However, the fitness of hybrids is unpredictable without direct quantification of their performance in fitness components across multiple generations. The land snails Bradybaena pellucida and B. similaris, which are Indigenous and non-Indigenous in Japan, respectively, copulate with each other simultaneously and reciprocally. However, only B. pellucida produces hybrids, because it ends mating by removing the penis before transferring a sperma...
Source: Zoological Science - March 1, 2009 Category: Zoology Authors: Wiwegweaw A, Seki K, Utsuno H, Asami T Tags: Zoolog Sci Source Type: journals

Reprobing multicolor fish preparations in lepidopteran chromosome.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Multicolor fluorescence in-situ hybridization (FISH) and subsequent reprobing of chromosome preparations increase the number of chromosomes and/or anchor loci on the chromosomes simultaneously identified. Reprobing techniques have been widely applied to chromosomes of vertebrates and plants. We have developed a novel reprobing protocol that utilizes multicolor FISH and bacterial artificial chromosome (BAC) probes to examine chromosome preparations in a model lepidopteran species, the silkworm, Bombyx mori. With standard two-color BAC-FISH, routinely used to map genes on B. mori chromosomes, we could localize only two p...
Source: Zoological Science - March 1, 2009 Category: Zoology Authors: Shibata F, Sahara K, Naito Y, Yasukochi Y Tags: Zoolog Sci Source Type: journals

Folic Acid is A Potent Chemoattractant of Free-Living Amoebae in A New and Amazing Species of Protist, Vahlkampfia sp.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Folic acid (folate; vitamin Bc) is well recognized as essential for the proper metabolism of the essential amino acid methionine as well as for the synthesis of adenine and thymine. A folate deficiency has been Implicated in a wide variety of disorders from Alzheimer's disease to depression and neural tube defects. In the cellular slime molds, including Dictyostelium, vegetative growthphase cells are known to chemotactically move toward folate that is secreted by bacterial food sources such as Escherichia coli. Intracellular folate signal transductlon, including G proteins, Ca(2+)channels, and the PIP3 pathway, has bee...
Source: Zoological Science - March 1, 2009 Category: Zoology Authors: Maeda Y, Mayanagi T, Amagai A Tags: Zoolog Sci Source Type: journals

Metamemory in tufted capuchin monkeys (Cebus apella).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Whereas evidence for metacognition by nonhuman primates has been obtained in great apes and old world monkeys, it is weaker in new world monkeys. For instance, capuchin monkeys may fail to recognize their own knowledge of the location of invisible bait. In the present study, we tested whether tufted capuchin monkeys would flexibly change their behavior in a delayed matching-to-sample (DMTS) test depending upon the strength of their memory trace of the sample. In Experiment 1, two monkeys were tested on a modified 9-alternative DMTS task with various delays on a computerized display. In some trials, the monkeys could ch...
Source: Animal Cognition - February 26, 2009 Category: Zoology Authors: Fujita K Tags: Anim Cogn Source Type: journals

Regulation of Hoxb4 induction after neurulation by somite signal and neural competenceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Conclusions: In identifying the collaboration between somites and neural tube competence in the induction of Hoxb4, this study demonstrates interplay between A-P and dorsal-ventral (D-V) patterning systems, whereby a specific feature of D-V polarity may be a prerequisite for proper A-P patterning by Hox genes.
Source: BMC Developmental Biology - Latest articles - February 25, 2009 Category: Zoology Authors: Gayana S Amirthalingam, Sara Howard, Susana Alvarez, Angel R de Lera and Nobue Itasaki Source Type: journals

Great apes' performance in discriminating weight and achromatic color.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We presented 12 subjects (5 bonobos, 2 gorillas and 5 orangutans) with two sets of objects corresponding to two conditions. The objects in the color condition (white/black) differed only in color and those in the weight condition (light/heavy) differed only in weight. Five apes learned to discriminate weight and six to discriminate color. Subjects learned color discrimination faster than weight discrimination. Our results suggest that bonobos and orangutans are sensitive to differences in weight and able to learn discriminating objects that differ in this property. PMID: 19238466 [PubMed - as supplied by publisher]
Source: Animal Cognition - February 24, 2009 Category: Zoology Authors: Schrauf C, Call J Tags: Anim Cogn Source Type: journals

Epithelial-specific requirement of FGFR2 signaling during tooth and palate development.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Reciprocal interactions between epithelium and mesenchyme are crucial for embryonic development. Fibroblast growth factors (FGFs) are a growth factor family that play an important role in epithelial-mesenchymal tissue interaction. We have generated epithelial-specific conditional knockout mice targeting Fibroblast growth factor receptor 2 (Fgfr2) to investigate the function of FGF signaling during craniofacial development. K14-Cre;Fgfr2(fl/fl) mice have skin defects, retarded tooth formation, and cleft palate. During the formation of the tooth primordium and palatal processes, cell proliferation in the epithelial cells...
Source: Journal of Experimental Zoology. Part B. Molecular and Developmental Evolution - February 23, 2009 Category: Zoology Authors: Hosokawa R, Deng X, Takamori K, Xu X, Urata M, Bringas P, Chai Y Tags: J Exp Zoolog B Mol Dev Evol Source Type: journals

Boundary cells regulate a switch in the expression of FGF3 in hindbrain rhombomeres.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Conclusions: These findings suggest that boundary cells are required for the downregulation of segmental FGF3, presumably mediated by a soluble factor(s) that emanates from boundaries. We propose that this new function of boundary cells enables a switch in gene expression that may be required for stage-specific functions of FGF3 in the developing hindbrain.
Source: BMC Developmental Biology - Latest articles - February 20, 2009 Category: Zoology Authors: Dalit Sela-Donenfeld, Galya Kayam and David G Wilkinson Source Type: journals

Fine-scale habitat selection by adult female swamp wallabies (Wallabia bicolor)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Matthew Swan, Julian Di Stefano, Andrew Greenfield, Graeme Coulson - Volume 56(5)
Source: Australian Journal of Zoology - February 19, 2009 Category: Zoology Source Type: journals

A novel exocrine structure of the bicellular unit type in the thorax of termitesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Gonçalves, T. T., DeSouza, O., Billen, J. 2009. A novel exocrine structure of the bicellular unit type in the thorax of termites [mdash] Acta Zoologica (Stockholm) xx: 000[ndash]000 Studying the thorax of some Termitidae species, we found two pairs of hitherto unknown lateral glands in the mesothorax and metathorax of both workers and soldiers. The glands consist of distinct clusters of class 3 secretory cells accompanied by their duct cells, located in the upper lateral portion of the thoracic wall. Ultrastructural observations reveal numerous mitochondria, a well-developed Golgi apparatus and vesicular smooth endoplasmi...
Source: Acta Zoologica - February 19, 2009 Category: Zoology Authors: Teresa Telles Gonçalves, Og DeSouza, Johan Billen Source Type: journals

Sds22, a PP1 phosphatase regulatory subunit, regulates epithelial cell polarity and shapeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Conclusions: Sds22 is a conserved PP1 phosphatase regulatory subunit that controls cell shape and polarity.
Source: BMC Developmental Biology - Latest articles - February 19, 2009 Category: Zoology Authors: Felix A Grusche, Cristina Hidalgo, Georgina Fletcher, Hsin-Ho Sung, Erik Sahai and Barry J Thompson Source Type: journals

Cold exposure does not decrease serum leptin concentration, but increases energy intake and thermogenic capacity in pregnant Brandt's voles (Lasiopodomys brandtii).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In most mammals, maternal body mass and fat mass increase during pregnancy due to hyperphagia. These physiological changes provide the fetus with energy and nutrients and prepare the mother for the high energetic demands of lactation. In the present study, metabolic changes in response to cold and pregnancy were examined in female Brandt's voles (Lasiopodomys brandtii). At 23+/-1 degrees C, the voles increased body mass and deposited body fat during pregnancy. However, at 5+/-1 degrees C pregnant voles did not deposit body fat even though energy intake increased above the level in the warm. Serum leptin concentration i...
Source: Zoology - February 19, 2009 Category: Zoology Authors: Zhang XY, Jing BB, Wang DH Tags: Zoology (Jena) Source Type: journals

Morphology, ornaments and performance in two chameleon ecomorphs: Is the casque bigger than the bite?Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The evolution of ecomorphs within a species may represent either unique evolutionary events or multiple convergent events in similar environments. Functional studies of differing morphological traits of ecomorphs have been important to elucidate their role in adaptive radiations. The Cape dwarf chameleon, Bradypodion pumilum, has two ecomorphs: a large, brightly colored, ornate form found in closed habitats, and a small, dull form with reduced ornamentation found in open vegetation. The typical form is known to use casque size to communicate fighting ability, but it is unknown whether this is an honest signal and wheth...
Source: Zoology - February 19, 2009 Category: Zoology Authors: Measey GJ, Hopkins K, Tolley KA Tags: Zoology (Jena) Source Type: journals

Ultrastructure of spermiogenesis and mature spermatozoon of Anonchotaenia globata (von Linstow, 1879) (Cestoda, Cyclophyllidea, Paruterinidae)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Yoneva, A., Georgieva, K., Mizinska, Ya., Nikolov, P.N., Georgiev, B.B. and Stoitsova, S.R. 2009. Ultrastructure of spermiogenesis and mature spermatozoon of Anonchotaenia globata (von Linstow 1879) (Cestoda, Cyclophyllidea, Paruterinidae). [mdash] Acta Zoologica (Stockholm) xx: 000[ndash]000 The ultrastructure of spermiogenesis and of the spermatozoon of a species of the family Paruterinidae is described for the first time. The spermiogenesis of Anonchotaenia globata starts with the formation of a differentiation zone with two centrioles associated with thin striated roots. One of the centrioles gives rise to a free flage...
Source: Acta Zoologica - February 18, 2009 Category: Zoology Authors: Aneta Yoneva, Katia Georgieva, Yana Mizinska, Pavel N. Nikolov, Boyko B. Georgiev, Stoyanka R. Stoitsova Source Type: journals

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