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This page shows you the most recent publications within this specialty of the MedWorm directory. This is page number 7.
Lag effect of microclimatic conditions on DNA integrity of frozen-thawed bovine sperm.
In conclusion, the results of the present study showed a lag effect of microclimate on DNA integrity of frozen-thawed bovine sperm. However, microclimatic parameters of a single time period before ejaculation could not be identified as the source of variation of different SCSA parameters. PMID: 23182467 [PubMed - in process]
Source: Animal Reproduction Science - December 1, 2012 Category: Zoology Authors: Malama E, Kiossis E, Theodosiou T, Boscos C, Bollwein H Tags: Anim Reprod Sci Source Type: research
Evaluation of growth models for follicle development and ovulation in Lusitano mares.
Abstract Several growth models are commonly used in the biological sciences, to model the follicle growth occurring in the estrous cycle. The aim of this project was to find the model that best fit the follicular size growth data for Lusitano mares. Retrospective data collected from reproduction book records of n=84 mares and n=124 cycles was used to find the series to be fitted to the models. The exponential, Gompertz, logistic, von Bertalanffy, Richards and Weibull models were used, and the most parsimonious and best fit was achieved with the logistic model (r(2)=0.999). The logistic model fits the Lusitano mare'...
Source: Animal Reproduction Science - December 1, 2012 Category: Zoology Authors: Mata F Tags: Anim Reprod Sci Source Type: research
Methodological factors affecting the results of staining frozen-thawed fertile and subfertile Japanese Black bull spermatozoa for acrosomal status.
Abstract In the present study, some methodological factors affecting the acrosomal staining of frozen-thawed Japanese Black bull spermatozoa were investigated by examining; the effect of fixation/permeabilization procedure on intact acrosome percentage after fluorescein isothiocyanate peanut agglutinin (FITC-PNA) staining, the acrosomal staining patterns by using two types of fluorescent probes FITC-PSA (Pisum Sativum Agglutinin) and FITC-PNA and the effect of staining methods, either smear or vial, on intact acrosome percentage. Then intact acrosome percentage was compared between the samples stained by thus estab...
Source: Animal Reproduction Science - December 1, 2012 Category: Zoology Authors: Almadaly E, El-Kon I, Heleil B, Fattouh el-S, Mukoujima K, Ueda T, Hoshino Y, Takasu M, Murase T Tags: Anim Reprod Sci Source Type: research
Long-term cryopreservation had no adverse effect on viability of embryos and their offspring in sheep.
Abstract Cryopreservation has been widely utilized in livestock and human embryos, which allows for storage of worthy embryos for a long period of time, although it is still uncertain as how long embryos can be cryopreserved in liquid nitrogen. The aims of this study were to evaluate the effects of long-term cryopreservation on birth rate of transferred sheep embryos at morula or blastocyst stage, and to investigate growth performance and viability of their offspring. A total of 373 sheep embryos from the same batch, which had been cryopreserved by conventional procedure for 0.5yr (n=259) or 7.5yr (n=114), respecti...
Source: Animal Reproduction Science - December 1, 2012 Category: Zoology Authors: Yao YC, Qi MY, Lu MH, Wang SM, Li W, Han HB Tags: Anim Reprod Sci Source Type: research
Morphological assessment of placentomal trophoblastic epithelium in the placenta of West African Dwarf goats: A light and electron microscopic study.
Abstract Gravid uteri harvested from 11 pregnant West African Dwarf goats at different stages of gestation were used to study the morphology of goat placentomal trophoblastic epithelium. The trophoblastic epithelium was composed of two trophoblast cell types; the mononucleate trophoblast cells and the binucleate trophoblast cells. Mononucleate trophoblast cells were tall columnar cells that rested on the basal lamina and extended to the foetomaternal interface, where their microvillar processes interdigitated with similar processes of the uterine epithelial cells to form the foetomaternal contact zone. Mononucleate...
Source: Animal Reproduction Science - December 1, 2012 Category: Zoology Authors: Igwebuike UM, Ezeasor DN Tags: Anim Reprod Sci Source Type: research
Sperm cryopreservation of the Indian major carp, Labeo calbasu: Effects of cryoprotectants, cooling rates and thawing rates on egg fertilization.
Abstract A sperm cryopreservation protocol for the Indian major carp, Labeo calbasu, was developed for long-term preservation and artificial fertilization. Milt collected from mature male fish were placed in Alsever's solution (296mOsmolkg(-1)) to immobilize the sperm. Cryoprotectant toxicity was evaluated by motility assessment with dimethyl sulfoxide (DMSO) and methanol at 5, 10 and 15% concentrations. DMSO was more toxic at higher concentrations than methanol, and consequently 15% DMSO was excluded from further study. A one-step cooling protocol (from 5 to 80°C) with two cooling rates (5 and 10°C/min) was carr...
Source: Animal Reproduction Science - December 1, 2012 Category: Zoology Authors: Nahiduzzaman M, Hassan MM, Roy PK, Hossain MA, Hossain MA, Tiersch TR Tags: Anim Reprod Sci Source Type: research
Effect of antioxidants on post thaw microscopic, oxidative stress parameter and fertility of Boer goat spermatozoa in Tris egg yolk glycerol extender.
This study was conducted to determine the effect of antioxidants on standard semen parameters, lipid peroxidation and fertility of Boer goat semen after cryopreservation. Ejaculates from four bucks were collected, evaluated and pooled at 37°C. The pooled semen was diluted with Tris citric acid fructose for washing. Semen samples, which were diluted with a Tris-based extender containing the antioxidant ascorbic acid (8.5mg/ml), butylated hydroxytoluene (2mM), cysteine (5mM) and hypotaurine (10mM) and an extender without antioxidant supplementation were cooled to 4°C and frozen in 0.25 straws with programmable freezer and ...
Source: Animal Reproduction Science - December 1, 2012 Category: Zoology Authors: Memon AA, Wahid H, Rosnina Y, Goh YM, Ebrahimi M, Nadia FM Tags: Anim Reprod Sci Source Type: research
Characteristics of stallion epididymal spermatozoa at collection and effect of two refrigeration protocols on the quality of the frozen/thawed sperm cells.
Abstract Cryopreservation of epididymal spermatozoa is a useful tool to preserve genetic material of valuable stallions after emergency castration or unexpected death. For that, testicles and epididymides are generally sent refrigerated to the laboratory. Collection of epididymal spermatozoa is a simple procedure that reduces the volume of the material to be shipped, and may improve the quality of the chilled epididymal sperm cells. In the present study we compared the characteristics of frozen/thawed epididymal spermatozoa after refrigeration of the epididymis or after direct refrigeration of the extended epididym...
Source: Animal Reproduction Science - December 1, 2012 Category: Zoology Authors: Guimarães T, Lopes G, Ferreira P, Leal I, Rocha A Tags: Anim Reprod Sci Source Type: research
Induction of double ovulation in mares using deslorelin acetate.
This study aimed to determine whether deslorelin acetate could induce double ovulation in mares. In Experiment 1, eight mares were treated with prostaglandin on Day 8 (D8) after ovulation, then treated with saline or with 100μg of a controlled-release formulation of deslorelin acetate vehicle intramuscularly (IM) every 12h from D8 after ovulation until at least two follicles reached 33mm. At this time, ovulation was induced with 2500 IU of hCG. Artificial insemination was performed 24h after induction, and embryos were collected on the eighth day after ovulation was first detected. In Experiment 2, 112 estrous cycles in 5...
Source: Animal Reproduction Science - December 1, 2012 Category: Zoology Authors: Nagao JF, Neto JR, Papa FO, Alvarenga MA, Freitas-Dell'aqua CP, Dell'aqua JA Tags: Anim Reprod Sci Source Type: research
Effect of sperm concentration on characteristics of frozen-thawed semen in donkeys.
In this study, the effect of donkey sperm concentration in the straw during cryopreservation on the quality of thawed semen was evaluated. Samples from seven adult Martina Franca jackasses were collected three times using a Missouri artificial vagina. After estimation of volume and concentration, raw semen was evaluated for motility using a computer-assisted sperm analyzer (CASA); viability and acrosome integrity were also determined. Fresh semen was then centrifuged and re-suspended at five different concentrations (100, 250, 500, 750, and 1000×10(6)sperm/ml) with a commercial extender, packaged in 0.5ml straws, and froz...
Source: Animal Reproduction Science - December 1, 2012 Category: Zoology Authors: Contri A, Gloria A, Robbe D, Sfirro MP, Carluccio A Tags: Anim Reprod Sci Source Type: research
Badge Size and Arrival Time Predict Mating Success of Red-Breasted Flycatcher Ficedula parva Males.
Abstract Older red-breasted flycatcher males (after the second year) have an orange patch on the throat and breast. To date, the occurrence of this ornament has been explained in terms of male-male interactions. In this paper, we show that badge size also influences the mating success of red-breasted-flycatcher males. In addition to the size of the ornament, arrival time was a second factor related to the males' mating success, but no effects of body parameters such as wing length, tarsus length, and body mass were observed. Mated males arrived significantly earlier than unmated ones. The arrival time of males was ...
Source: Zoological Science - December 1, 2012 Category: Zoology Authors: Mitrus C, Mitrus J, Sikora M Tags: Zoolog Sci Source Type: research
Gliogenesis in the Mushroom Body of the Carpenter Ant, Camponotus japonicus.
In this study, to address the developmental aspects of their MBs, gliogenesis of mushroom body neuroblasts (MB Nbs) was examined in the carpenter ant Camponotus japonicus. Reversed Polarity (REPO) is a paired-like homeodomain protein located exclusively in the nucleus of differentiating glial cells in the fruit fly Drosophila melanogaster. First, the molecular aspects of C. japonicus REPO (CjREPO) were identified. Then, the antibody (CjREPO-antibody) was raised against a peptide of CjREPO. Immunohistochemistry revealed that the strong labeling was located in the nucleus of glial cells in the developing brains, whereas no i...
Source: Zoological Science - December 1, 2012 Category: Zoology Authors: Nasu N, Hara K Tags: Zoolog Sci Source Type: research
Histological Observations of Early Gonadal Development to Form Asymmetrically in the Dwarf Gourami Colisa lalia.
Abstract The asymmetrical and latitudinal formation of the gonads during early development in the dwarf gourami Colisa lalia was histologically observed using fish reared in laboratory. Hatching larvae obtained 33 hours after spawning possessed primordial germ cells (PGCs), which aggregated to the dorsal surface of the gut. In prolarvae on day 7, the gonadal anlagen were still situated on the dorsal surface of the gut, however, in those on day 10, the left gonadal anläge began to shift leftward, although the coelom did not develop sufficiently. In prolarvae on day 20, the right gonadal anlage also began to move le...
Source: Zoological Science - December 1, 2012 Category: Zoology Authors: Hayakawa Y, Kobayashi M Tags: Zoolog Sci Source Type: research
On the Apterous Line of the Termite Velocitermes heteropterus (Isoptera: Termitidae): Developmental Pathways and Cellulose Digestion.
We examined the occurrence of polymorphism in the apterous line of Velocitermes heteropterus and determined the developmental pathways for this termite species. We also investigated the expression of the cellulase genes encoding β-glucosidase and endo-β-1,4-glucanase among the castes to determine whether there is a difference in digestion and, consequently, a possible division of labor with respect to this activity among the worker castes. The apterous line of V. heteropterus presents individuals of both sexes with two larval instars. The female larvae become major workers, and the male larvae become minor workers and so...
Source: Zoological Science - December 1, 2012 Category: Zoology Authors: Haifig I, Leonardo FC, Costa FF, Costa-Leonardo AM Tags: Zoolog Sci Source Type: research
Population Divergence of the Sentinel Crab Macrophthalmus banzai is Consistent with Regional Breeding Season Differences.
Abstract We compared the breeding season and genetic population structure of six sentinel crab (Macrophthalmus banzai) populations in southwestern Japan. Ovigerous females from Northern group populations (Wakayama, Kochi, and Tanega-shima) were observed from March to September, whereas ovigerous females from Southern group populations (Amami-oshima, Okinawa-jima, and Iriomote-jima) were observed from October to May. Genetic analysis using two markers corresponding to mitochondrial DNA encoding cytochrome oxidase subunit I (COI) and the large subunit of ribosomal RNA (16Sr-RNA) revealed a marked genetic difference b...
Source: Zoological Science - December 1, 2012 Category: Zoology Authors: Aoki M, Nakagawa Y, Kawamoto M, Wada K Tags: Zoolog Sci Source Type: research
Genetic Distinctness and Variation in the Tsushima Islands Population of the Japanese Marten, Martes melampus (Carnivora: Mustelidae), Revealed by Microsatellite Analysis.
Abstract A carnivoran mammal endemic to Japan, the Japanese marten (Martes melampus) is native in forested regions on Honshu, Shikoku, Kyushu (main islands of Japan), and the Tsushima Islands. The Tsushima population is classified as a different subspecies (M. m. tsuensis) from populations on the main islands (M. m. melampus). To elucidate the genetic structure of the Tsushima population, we genotyped 101 individuals from the Tsushima Islands and 43 individuals from Honshu and Kyushu using 10 microsatellite loci, and performed population genetic analyses on the genotype data. Genetic diversity was lower in the Tsus...
Source: Zoological Science - December 1, 2012 Category: Zoology Authors: Kamada S, Moteki S, Baba M, Ochiai K, Masuda R Tags: Zoolog Sci Source Type: research
The Impact of Global Warming on the Range Distribution of Different Climatic Groups of Aspidoscelis costata costata.
Abstract The ectothermic nature of reptiles makes them especially sensitive to global warming. Although climate change and its implications are a frequent topic of detailed studies, most of these studies are carried out without making a distinction between populations. Here we present the first study of an Aspidoscelis species that evaluates the effects of global warming on its distribution using ecological niche modeling. The aims of our study were (1) to understand whether predicted warmer climatic conditions affect the geographic potential distribution of different climatic groups of Aspidoscelis costata costata...
Source: Zoological Science - December 1, 2012 Category: Zoology Authors: Güizado-Rodríguez MA, Ballesteros-Barrera C, Casas-Andreu G, Barradas-Miranda VL, Téllez-Valdés O, Salgado-Ugarte IH Tags: Zoolog Sci Source Type: research
Liver anatomy, histochemistry, and ultrastructure of eupemphix nattereri (anura: leiuperidae) during the breeding season.
Abstract The arrangement of the hepatic tissue is directly related to physiological characteristics of animals, such as ectothermy, diet, and reproductive status. Here, we describe the anatomy, histology, and ultrastructure of the liver in adult males of Eupemphix nattereri during the breeding season. The liver is an organ with an irregular shape, red in color, and occupies a large portion of the body cavity. Anatomically, it is divided into three lobes: right, mid, and left. Further subdivision into lobules is not observed. A thin capsule of connective tissue covers externally the organ, which is responsible for i...
Source: Zoological Science - December 1, 2012 Category: Zoology Authors: Franco-Belussi L, Santos LR, Zieri R, Vicentini CA, Taboga SR, Oliveira Cd Tags: Zoolog Sci Source Type: research
Social Interaction Influences Blood Cortisol Values and Brain Aromatase Genes in the Protandrous False Clown Anemonefish, Amphiprion ocellaris.
Abstract Anemonefish, Amphiprion spp., are socially controlled, protandrous sex changers with a monogamous mating system. Under certain conditions, sexually immature anemonefish with ambisexual gonads differentiate directly into males or females. Formation and maintenance of social rank in a group are considered key requirements for the induction of sex change or differentiation. Generally, each animal living in a social group experiences a different level of social stress in accordance with its social rank, and we hypothesize that the stress situation of individual anemonefish influences its sex determination. Gro...
Source: Zoological Science - December 1, 2012 Category: Zoology Authors: Iwata E, Mikami K, Manbo J, Moriya-Ito K, Sasaki H Tags: Zoolog Sci Source Type: research
A new species of hydra (cnidaria: hydrozoa: hydridae) and molecular phylogenetic analysis of six congeners from china.
Abstract A new species of genus Hydra (Cnidaria: Hydrozoa: Hydridae), Hydra shenzhensis sp. nov. from Guangdong Province, China, is described and illustrated. Most polyps have five tentacles. Column length reaches 11 mm when relaxed. Buds do not acquire tentacles synchronously. Stenotele is broad and pyriform in shape, 1.2 times as long as its width. Holotrichous isorhiza is asymmetrical and slender (more than 2.7 times as long as its width), with transverse and slanting coils. Atrichous isorhiza is long, resembling a melon-seed in shape. Desmoneme is asymmetrically pyriform in shape. The new species, belonging to ...
Source: Zoological Science - December 1, 2012 Category: Zoology Authors: Wang AT, Deng L, Liu HT Tags: Zoolog Sci Source Type: research
Effects of fermented persimmon extract supplements on chemical composition and fermentation characteristics of barley silage
This study was conducted to estimate the effect of fermented persimmon extract (FPE) supplementation levels on chemical composition and fermentation characteristics of barley silage. Barley forage was harvested at 25% dry matter and chopped to 5 cm lengths. The FPE was applied at 0, 0.4, 0.8 and 1.6 g/kg of barley forage (fresh weight basis). After sub‐sampling of barley forages (0 day), a total of 64 laboratory mini silos (5 kg capacity) were ensiled to generate quadruplicate data from each of four treatments for four ensiling durations (2, 6, 40 and 120 days). The chemical compositions and in vitro digestibility ...
Source: Animal Science Journal - December 1, 2012 Category: Zoology Authors: Sang Bum Kim, Dong Hyeon Kim, Hyuk Jun Lee, Sadar M. Amanullah, Sam Churl Kim Tags: Original Article Source Type: research
The survival of multidrug‐resistant bacteria in thermophilic and mesophilic anaerobic co‐digestion of dairy manure and waste milk
Abstract Anaerobic digestion is considered as a promising method to manage animal waste with antibiotic‐resistant bacteria. Current research was conducted to investigate the survival of multidrug‐resistant bacteria (MDRB) resistant to three groups of antibiotics: (i) cefazolin, neomycin, vancomycin, kanamycin (group 1); (ii) penicillin, oxytetracycline, ampicillin, streptomycin (group 2); and (iii) cefazolin, neomycin, vancomycin, kanamycin, penicillin, oxytetracycline, ampicillin, streptomycin (group 3), in anaerobic digestion of dairy manure and co‐digestion of dairy manure and waste milk at 37°C and 55°C for 22 ...
Source: Animal Science Journal - December 1, 2012 Category: Zoology Authors: Nilmini Beneragama, Masahiro Iwasaki, Suraju A. Lateef, Takaki Yamashiro, Ikko Ihara, Kazutaka Umetsu Tags: Original Article Source Type: research
Characterization of the intronic VNTR polymorphisms found in a paralog of chicken serotonin transporter gene
Abstract Polymorphisms in the neurotransmitter‐related genes can be a major source of behavioral variations. We searched for polymorphic sites in chicken neurotransmitter‐related genes and identified two variable number of tandem repeat (VNTR) loci encompassing the paralog of chicken serotonin transporter gene (5‐HTT). Both intronic VNTR were highly polymorphic across chicken breeds and the other Galliformes species, even though predominant alleles were considerably different among breeds. One VNTR locus contained sequences complementary to a conserved motif of CCCTC‐binding factor (CTCF) within each repetitive uni...
Source: Animal Science Journal - December 1, 2012 Category: Zoology Authors: Hideaki Abe, Hiro‐aki Takeuchi, Satoko Yamada, Akihiro Nakamura, Kenji Nagao, Keijiro Nirasawa, Shin'ichi Ito, Miho Inoue‐Murayama Tags: Original Article Source Type: research
Local trophic specialisation in a cosmopolitan spider (Araneae).
Abstract Trophic specialisation can be observed in species with long-term constant exploitation of a certain prey in all populations or in a population of a species with short-term exploitation of a certain prey. While in the former case the species would evolve stereotyped or specialised trophic adaptations, the trophic traits of the latter should be versatile or generalised. Here, we studied the predatory behavioural adaptations of a presumed myrmecophagous spider, Oecobius navus. We chose two distinct populations, one in Portugal and the other in Uruguay. We analysed the actual prey of both populations and found...
Source: Zoology - November 29, 2012 Category: Zoology Authors: Líznarová E, Sentenská L, García LF, Pekár S, Viera C Tags: Zoology (Jena) Source Type: research
Circus Venomous: An interactive tool for toxinology education.
CONCLUSIONS: The Circus Venomous is a novel, interactive, flexible, and cost-effective teaching tool about envenomation emergencies. We hope that this concept will encourage other clinical educators toward further innovation. Future directions for our group include greater inclusion of marine species into the Circus Venomous, and formal longitudinal testing to measure knowledge retention based on this approach. PMID: 23201504 [PubMed - as supplied by publisher]
Source: Toxicon - November 29, 2012 Category: Toxicology Authors: Vohra R, Spano S Tags: Toxicon Source Type: research
Comparative description of ten transcriptomes of newly sequenced invertebrates and efficiency estimation of genomic sampling in non-model taxa
Conclusions: We generated the first study of comparative transcriptomics across multiple animal phyla (comparing two species per phylum in most cases), established the first Illumina-based transcriptomic datasets for sponge, nemertean, and sipunculan species, and generated a tractable catalogue of annotated genes (or gene fragments) and protein families for ten newly sequenced non-model organisms, some of commercial importance (i.e., Octopus vulgaris). These comprehensive sets of genes can be readily used for phylogenetic analysis, gene expression profiling, developmental analysis, and can also be a powerful resource for g...
Source: Frontiers in Zoology - November 29, 2012 Category: Zoology Authors: Ana RiesgoSónia AndradePrashant SharmaMarta NovoAlicia Pérez-PorroVarpu VahteraVanessa GonzálezGisele KawauchiGonzalo Giribet Source Type: research
Avian Predation Pressure as a Potential Driver of Periodical Cicada Cycle Length
Walter D. Koenig and Andrew M. Liebhold, The American Naturalist, Volume 0, Issue 0, Page 000, Ahead of Print.
Source: The American Naturalist - November 28, 2012 Category: Zoology Tags: article Source Type: research
Network Analysis of Social Changes in a Captive Chimpanzee Community Following the Successful Integration of Two Adult Groups
We describe the process of successfully integrating two groups of chimpanzees, each containing 11 individuals, in the Budongo Trail facility at the Royal Zoological Society of Scotland's Edinburgh Zoo. We use social network analysis to document changes in group dynamics within this population over the 16 months following integration. Aggression rates were low overall and members of the two original groups engaged in significantly fewer aggressive interactions over time. Association and grooming data indicate that relationships between members of the original groups became stronger and more affiliative with time. Despite th...
Source: American Journal of Primatology - November 28, 2012 Category: Psychiatry & Psychology Authors: ANNE MARIJKE SCHEL, BRUCE RAWLINGS, NICOLAS CLAIDIÈRE, CLAUDIA WILKE, JEN WATHAN, JO RICHARDSON, SOPHIE PEARSON, ELIZABETH HERRELKO, ANDREW WHITEN, KATIE SLOCOMBE Tags: RESEARCH ARTICLE Source Type: research
Rodlet cells in epidermal explant cultures of Lepomis Macrochirus
Abstract Sunfish rodlet cells were examined in vitro using a novel tissue explant system. Outgrowth of epidermal cell layers from explanted fish scales enabled both live cell videomicroscopy and immunocytochemical analysis of rodlet cells within the cell layer. Cells stained with fluorescent phallotoxin and antibody to tubulin showed that F‐actin is a component of the fibrous capsule that envelopes the cell and a microtubule network extends from the basal to apical ends of the cell interior. The fibrous capsule is also enriched for phosphotyrosine suggesting a potential signal‐transducing capability is present in this ...
Source: Acta Zoologica - November 28, 2012 Category: Zoology Authors: Joseph A. DePasquale Tags: Original Article Source Type: research
Zoology: Blue whales roll with it
Nature 491, 7426 (2012). doi:10.1038/491640d Blue whales (Balaenoptera musculus) can perform 360 ° rolls, an impressive manoeuvre for the largest animal ever to have lived.Jeremy Goldbogen of the Cascadia Research Collective in Olympia, Washington, and his colleagues tagged blue whales off the coast of California with sensors
Source: Nature - November 28, 2012 Category: Research Tags: Research Highlights Source Type: research
Within-Clutch Variation in Yolk Testosterone as an Adaptive Maternal Effect to Modulate Avian Sibling Competition: Evidence from a Comparative Study
Martina Muller and Ton G. G. Groothuis, The American Naturalist, Volume 0, Issue 0, Page 000, Ahead of Print.
Source: The American Naturalist - November 27, 2012 Category: Zoology Tags: article Source Type: research
Pathogen Diversity and Hidden Regimes of Apparent Competition
Sarah Cobey and Marc Lipsitch, The American Naturalist, Volume 0, Issue 0, Page 000, Ahead of Print.
Source: The American Naturalist - November 27, 2012 Category: Zoology Tags: article Source Type: research
Red shiners (Cyprinella lutrensis) have larger eyes in turbid habitats
Canadian Journal of Zoology, Volume 0, Issue 0, Page 1-6, e-First articles.
Source: Canadian Journal of Zoology - November 27, 2012 Category: Zoology Tags: article Source Type: research
The luteal outcome of anoestrus ewes induced to ovulate by the male effect is not related to the population of ovarian antral follicles before male exposure.
In conclusion, (1) the luteal outcome following the first ovulation induced by the male effect depends on the time of onset of seasonal anoestrus and (2) the number and size of follicles ≥2mm also depend on the time of onset of seasonal anoestrus but are not related to the luteal outcome following the first ovulation induced by the male effect. PMID: 23265283 [PubMed - as supplied by publisher]
Source: Animal Reproduction Science - November 27, 2012 Category: Zoology Authors: Pellicer-Rubio MT, Touzé JL, Baril G, Malpaux B Tags: Anim Reprod Sci Source Type: research
Differentially expressed genes in cisplatin-induced premature ovarian failure in rats.
CONCLUSIONS: The immune inflammatory response and reactive oxygen species may damage ovarian function in the cisplatin-induced POF. PMID: 23266200 [PubMed - as supplied by publisher]
Source: Animal Reproduction Science - November 27, 2012 Category: Zoology Authors: Li D, Chen Y, Qi L, Ju X, Liu H, Wang G Tags: Anim Reprod Sci Source Type: research
Zooplankton communities of inter-connected sections of lower River Oder (NW Poland)
Abstract The aim of this study was the determination and comparative analysis of the zooplankton communities between the inter-connected sections of the lower Oder river in relation to physicochemical factors. The study was performed at five sites of Oder. Two sites were localized in the main channel of Oder (East Oder), other sites were localized in the west arm of Oder and at the beginning of the canal carrying the post-cooling water from the power plant, and the last site was below at the shallow channel joining the Western Oder with the Eastern Oder. At the channel site in which the two arms of the river...
Source: Central European Journal of Biology - November 26, 2012 Category: Biology Tags: Central European Journal of Biology Source Type: research
An epidemiological surveillance of asymptomatic typhoid carriers associated in respect to socioeconomic status in India
Content Type Journal ArticleCategory CommentPages 1-5DOI 10.1007/s10389-012-0545-4Authors Balakrishnan Senthilkumar, Centre for Biotechnology, Muthayammal College of Arts and Science, Rasipuram, 637 408 Tamil Nadu, IndiaDuraisamy Senbagam, Department of Biotechnology, Vivekanandha College of Engineering for Women, Tiruchengode, 637 205 Tamil Nadu, IndiaMoses Rajasekarapandian, Department of Zoology, Arignar Anna Government Arts College, Namakkal, 637 001 Tamil Nadu, India Journal Journal of Public HealthOnline ISSN 1613-2238Print ISSN 0943-1853
Source: Journal of Public Health - November 26, 2012 Category: Health Management Tags: Journal of Public Health Source Type: research
Divergent reproductive life histories in Haida Gwaii stickleback (Gasterosteus spp.)
Canadian Journal of Zoology, Volume 0, Issue 0, Page 17-24, e-First articles.
Source: Canadian Journal of Zoology - November 26, 2012 Category: Zoology Tags: article Source Type: research
Symmetrical gaits and center of mass mechanics in small-bodied, primitive mammals.
This study explores locomotor dynamics in one eutherian and five metatherian (marsupials) mammals-all small-bodied (<2kg) with generalized body plans that utilize symmetrical gaits. Across our sample, trials conforming to vaulting mechanics occurred least frequently (<10% of all trials) while bouncing mechanics was obtained most commonly (60%); the remaining trials represented mixed mechanics. Contrary to the common situation in large mammals, there was no evidence for discrete gait switching within symmetrical gaits as speed increased. This was in part due to the common practice of grounded running. The adaptive adv...
Source: Zoology - November 26, 2012 Category: Zoology Authors: Biknevicius AR, Reilly SM, McElroy EJ, Bennett MB Tags: Zoology (Jena) Source Type: research
Correction to Stagner et al. (2012).
Reports an error in "Pigeons prefer discriminative stimuli independently of the overall probability of reinforcement and of the number of presentations of the conditioned reinforcer" by Jessica P. Stagner, Jennifer R. Laude and Thomas R. Zentall ( Journal of Experimental Psychology: Animal Behavior Processes, 2012[Oct], Vol 38, 446-452). The top and middle panels of Figure 1 were reversed. Additionally, the caption line that reads “Middle: Design of procedure used in Phase 3 training” should read “Middle: Design of procedure used in Phase 2 training”. A corrected figure is included. (The following abstract of th...
Source: Journal of Experimental Psychology: Animal Behavior Processes - November 26, 2012 Category: Zoology Authors: Stagner, Jessica P.; Laude, Jennifer R.; Zentall, Thomas R. Source Type: research
Sexual size dimorphism in greater mouse‐eared bat Myotis myotis (Chiroptera: Vespertilionidae) from a Mediterranean region
In this study, we examine sexual dimorphism in the wing measurements of 195 adult individuals (141 males and 54 females) of the greater mouse‐eared bat Myotis myotis in the south‐east of the Iberian Peninsula. We also investigated size differences between paired and single males in a swarming roost. The results indicate that there are significant differences in the wing measurements between sexes, females being bigger than males in this respect. While no significant differences in the wing measurements of paired and single males were observed, significant differences were found in their relative weight and fitness, sin...
Source: Acta Zoologica - November 26, 2012 Category: Zoology Authors: Fulgencio Lisón, Ángeles Haz, Carlos González‐Revelles, José F. Calvo Tags: Original Article Source Type: research
The cytotoxic effects of diketopiperaizes against Leishmania donovani promastigotes and amastigotes
Abstract A series of diketopiperazine derivatives (1–12) were evaluated for their in vitro cytotoxic activity against Leishmania donovani promastigotes and amastigotes. Cytotoxicity study revealed that the number and types of the substituents in the phenyl rings have valuable influence on cytotoxic activity. Compounds 1, 3, 4, 11, and 12 demonstrated appreciable cytotoxic activities with the mean IC50 values 1.4, 1.1, 1.02, 1, 0.7 μg/ml on extra cellular promastigotes and 1.6, 1.8, 0.61, 0.53, 1.1 μg/ml on intracellular amastigotes, respectively. The results suggested that diketopiperazine deriva...
Source: Medicinal Chemistry Research - November 25, 2012 Category: Chemistry Tags: Medicinal Chemistry Research Source Type: research
A trophic study of the sympatric Amazonian freshwater turtles Podocnemis unifilis and Podocnemis expansa (Testudines, Podocnemidae) using carbon and nitrogen stable isotope analyses
Canadian Journal of Zoology, Volume 0, Issue 0, Page 1394-1401, e-First articles.
Source: Canadian Journal of Zoology - November 25, 2012 Category: Zoology Tags: article Source Type: research
Two novel blood‐free solid media for the culture of the salmonid pathogen Piscirickettsia salmonis
Source: Journal of Fish Diseases - November 23, 2012 Category: Zoology Authors: A J Yañez, H Silva, K Valenzuela, J P Pontigo, M Godoy, J Troncoso, A Romero, J Figueroa, J G Carcamo, R Avendaño‐Herrera Tags: Short Communication Source Type: research
Reconciliation in Male Stump‐tailed Macaques (Macaca arctoides): Intolerant Males Care for Their Social Relationships
Abstract Recent research has shown that social relationships may exert positive effects on fitness. Therefore, it is expected that animals make efforts to develop and preserve close social bonds. Reconciliation is a conflict resolution mechanism, which allows buffering the negative effects of aggressive conflict on social relationships. As socioecological theories claim that intrasexual competition and conflict‐shaped social interactions among macaque males, postconflict behaviour should reflect the effects of these evolutionary forces. Here, we present the results of a study on a provisioned group of Macaca arctoides in...
Source: Ethology - November 23, 2012 Category: Zoology Authors: Claudio O, Lieke Mevis, Christin Richter, Suchinda Malaivijitnond, Julia Ostner, Oliver Schülke Tags: Research Paper Source Type: research
No short-term effect of salinity on oxygen consumption in threespine stickleback (Gasterosteus aculeatus) from fresh, brackish, and salt water
Canadian Journal of Zoology, Volume 0, Issue 0, Page 1386-1393, e-First articles.
Source: Canadian Journal of Zoology - November 23, 2012 Category: Zoology Tags: article Source Type: research
Different responses of two strains of chickens to different training procedures for magnetic directions.
Abstract In previous conditioning experiments training domestic chickens to magnetic directions, a brown strain solved the task, whereas a white strain seemed unable to do so (Freire et al. Anim Cogn 11:547-552, 2008). To test whether this was possibly caused by loss of magnetic compass orientation in the white chickens, we analyzed the distribution of cryptochrome 1a, the candidate receptor molecule mediating magnetic compass information, in the retinae of Lohmann Browns and White Leghorns and found no difference between the two strains. Yet, subsequent training experiments replicated the former findings: Lohmann ...
Source: Animal Cognition - November 23, 2012 Category: Zoology Authors: Denzau S, Nießner C, Wiltschko R, Wiltschko W Tags: Anim Cogn Source Type: research
Anatomical adaptations of the hind limb musculature of tree-kangaroos for arboreal locomotion (Marsupialia : Macropodinae)
Natalie M. Warburton, Maud Yakovleff, Auréline Malric - Volume 60(4)
Source: Australian Journal of Zoology - November 22, 2012 Category: Zoology Authors: Natalie M. WarburtonMaud YakovleffAuréline Malric Source Type: research
The psychophysics of sugar concentration discrimination and contrast evaluation in bumblebees.
In this study, we investigated the discrimination performance of free-flying bumblebee workers (Bombus impatiens) in a choice between sucrose solutions with different concentrations. We conducted two-alternative free choice experiments on two B. impatiens colonies containing some electronically tagged bumblebees foraging at an array of computer-automated artificial flowers that recorded individual choices. We mimicked natural foraging conditions by allowing uncertainty in the probability of reward delivery while maintaining certainty in reward concentration. We used a Bayesian approach to fit psychometric functions, relati...
Source: Animal Cognition - November 22, 2012 Category: Zoology Authors: Nachev V, Thomson JD, Winter Y Tags: Anim Cogn Source Type: research
Behavioural inventory of the giraffe (Giraffa camelopardalis)
Conclusions: This ethogram provides a basis for current and future studies by suggesting a terminology which can be used for harmonizing behavioural observations, thus helping to facilitate comparability of future results. Subsequently, a better understanding of the behavioural ecology of giraffes in the wild as well as in captivity could aid future conservation efforts.
Source: BMC Research Notes - November 22, 2012 Category: Research Authors: Peter SeeberIsabelle CiofoloAndré Ganswindt Source Type: research