Zoology Research 
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This page shows you the most recent publications within this specialty of the MedWorm directory. This is page number 39.
Geographic distribution of Rhyncholestes raphanurus Osgood, 1924 (Paucituberculata : Caenolestidae), an endemic marsupial of the Valdivian Temperate Rainforest
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Gabriel M. Martin - Volume 59(2)
Source: Australian Journal of Zoology - October 10, 2011 Category: Zoology Authors: Gabriel M. Martin Source Type: research
Genetic diversity and biogeographic history inform future conservation management strategies for the rare sunset frog (Spicospina flammocaerulea)Email this article to a colleague.
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D. L. Edwards, J. D. Roberts - Volume 59(2)
Source: Australian Journal of Zoology - October 10, 2011 Category: Zoology Authors: D. L. EdwardsJ. D. Roberts Source Type: research
Genome-wide mapping of Sox6 binding sites in skeletal muscle reveals both direct and indirect regulation of muscle terminal differentiation by Sox6Email this article to a colleague.
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Conclusion:
Our present data indicate that during development, Sox6 functions as a transcriptional suppressor of fiber type specific and developmental isoform genes to promote functional specification of muscle which is critical for optimum muscle performance and health.
Source: BMC Developmental Biology - Latest articles - October 10, 2011 Category: Zoology Authors: Chung-Il AnYao DongNobuko Hagiwara Source Type: research
Hormone concentration changes temporally associated with the hour of transition from preluteolysis to luteolysis in mares.Email this article to a colleague.
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Abstract
The temporal associations of cortisol, estradiol-17β, and oxytocin with pulses of PGFM at the common hour of transition between preluteolysis and luteolysis was studied in plasma from hourly blood samples in mares (n=8). The transitional hour was determined from progesterone concentrations and occurred between 2PM and 2AM in all mares. Pulses of PGFM were grouped into those occurring at the last pulse of preluteolysis (preluteolytic pulse), at the hour of transition (transitional), and during luteolysis (luteolytic). The preluteolytic PGFM pulse (45±16pg/ml at peak) and transitional pulse (42±7pg/ml) ar...
Source: Animal Reproduction Science - October 7, 2011 Category: Zoology Authors: Ginther OJ, Beg MA Tags: Anim Reprod Sci Source Type: research
Transvaginal ultrasound-guided cumulus oocyte complexes aspiration and in vitro embryo production in suckled beef and lactating dairy cattle on pasture-based management conditions.Email this article to a colleague.
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This study was conducted to determine the use of repeated transvaginal ultrasound-guided cumulus oocyte complex (COC) aspiration on COC recovery rate, in vitro embryo production (IVP) and subsequent pregnancy rates in Holstein Friesian (HF) and Aberdeen Angus (AA) cows (Experiment 1), and in pregnant and non-pregnant Holstein Friesian cows (Experiment 2). Cycling, non-pregnant HF (n=17) and AA (n=32) cows with 40-70 days postpartum, between 3 and 5 years of age were used in the Experiment 1. All cows were submitted to repeated transvaginal ultrasound-guided COC aspiration twice a week for 5-7 weeks. Cumulus ooctye complexe...
Source: Animal Reproduction Science - October 7, 2011 Category: Zoology Authors: Ratto MH, Peralta OA, Mogollon G, Strobel P, Correa J Tags: Anim Reprod Sci Source Type: research
Ecology of Stimson's python (Antaresia stimsoni) in the MacDonnell Ranges of central AustraliaEmail this article to a colleague.
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Peter J. McDonald, Gary W. Luck, Skye Wassens, Chris R. Pavey - Volume 59(2)
Source: Australian Journal of Zoology - October 7, 2011 Category: Zoology Authors: Peter J. McDonaldGary W. LuckSkye WassensChris R. Pavey Source Type: research
Urinary corticosterone responses and haematological stress indicators in the endangered Fijian ground frog (Platymantis vitiana) during transportation and captivityEmail this article to a colleague.
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Edward Narayan, Jean-Marc Hero - Volume 59(2)
Source: Australian Journal of Zoology - October 7, 2011 Category: Zoology Authors: Edward NarayanJean-Marc Hero Source Type: research
Lizard diversity on a rainforest–savanna altitude gradient in north-eastern AustraliaEmail this article to a colleague.
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A. S. Kutt, B. L. Bateman, E. P. Vanderduys - Volume 59(2)
Source: Australian Journal of Zoology - October 7, 2011 Category: Zoology Authors: A. S. KuttB. L. BatemanE. P. Vanderduys Source Type: research
Genetic differentiation and introgression amongst Thylogale (pademelons) taxa in eastern AustraliaEmail this article to a colleague.
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M. D. B. Eldridge, K. Heckenberg, L. E. Neaves, C. J. Metcalfe, S. Hamilton, P. M. Johnson, R. L. Close - Volume 59(2)
Source: Australian Journal of Zoology - October 7, 2011 Category: Zoology Authors: M. D. B. EldridgeK. HeckenbergL. E. NeavesC. J. MetcalfeS. HamiltonP. M. JohnsonR. L. Close Source Type: research
Worker heterozygosity and immune response in feral and managed honeybees (Apis mellifera)Email this article to a colleague.
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E. C. Lowe, L. W. Simmons, B. Baer - Volume 59(2)
Source: Australian Journal of Zoology - October 7, 2011 Category: Zoology Authors: E. C. LoweL. W. SimmonsB. Baer Source Type: research
Exposure to Elevated Temperature and Pco2 Reduces Respiration Rate and Energy Status in the Periwinkle Littorina littoreaEmail this article to a colleague.
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Physiological and Biochemical Zoology, Volume 0, Issue 0, Page 000, Ahead of Print.
Source: Physiological and Biochemical Zoology - October 6, 2011 Category: Zoology Tags: article Source Type: research
Allometry of Sexual Size Dimorphism in Dioecious Plants: Do Plants Obey Rensch’s Rule?Email this article to a colleague.
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The American Naturalist, Volume 0, Issue 0, Page 000, Ahead of Print.
Source: The American Naturalist - October 6, 2011 Category: Zoology Tags: article Source Type: research
Serum Leptin, Energy Budget, and Thermogenesis in Striped Hamsters Exposed to Consecutive Decreases in Ambient TemperaturesEmail this article to a colleague.
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Physiological and Biochemical Zoology, Volume 0, Issue 0, Page 000, Ahead of Print.
Source: Physiological and Biochemical Zoology - October 5, 2011 Category: Zoology Tags: article Source Type: research
The spatio-temporal patterning of Hoxa9 and Hoxa13 in the developing zebrafish enteric nervous systemEmail this article to a colleague.
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Conclusions These results show further evidence that Hoxa9 and Hoxa13 are involved in the early and organised patterning of ENS development in the zebrafish model.
Content Type Journal ArticleCategory Original ArticlePages 1-7DOI 10.1007/s00383-011-2992-3Authors
R. Doodnath, National Children’s Research Centre, Our Lady’s Children’s Hospital, Crumlin, Dublin 12, IrelandM. Wride, Department of Zoology, School of Natural Sciences, Trinity College, Dublin 2, IrelandP. Puri, National Children’s Research Centre, Our Lady’s Children’s Hospital, Crumlin, Dublin 12, Ireland
Journal Pediatri...
Source: Pediatric Surgery International - October 5, 2011 Category: Surgery Tags: Pediatric Surgery International Source Type: research
Bird terrestrial locomotion as revealed by 3D kinematics.Email this article to a colleague.
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In this study, we examine the kinematics of the head, the trunk, and the legs during terrestrial locomotion in the quail (Coturnix coturnix). Despite the trunk representing about 70% of the total body mass, its function in locomotion has received little scientific interest to date. This prompted us to focus on its role in terrestrial locomotion. We used high-speed video fluoroscopic recordings of quails walking at voluntary speeds on a trackway. Dorso-ventral and lateral views of the motion of the skeletal elements were recorded successively and reconstructed in three dimensions using a novel method based on the temporal s...
Source: Zoology - October 5, 2011 Category: Zoology Authors: Abourachid A, Hackert R, Herbin M, Libourel PA, Lambert F, Gioanni H, Provini P, Blazevic P, Hugel V Tags: Zoology (Jena) Source Type: research
Swimming fundamentals: turning performance of leopard sharks (Triakis semifasciata) is predicted by body shape and postural reconfiguration.Email this article to a colleague.
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Abstract
Turns are essential maneuvers that sharks employ when foraging, feeding, and migrating. How well any individual performs in turning is determined, in part, by the static form and postural reconfiguration of its body. Since the importance of postural reconfiguration in determining turning performance is not well understood, our goal was to examine how body form and posture correlate with turning performance in juvenile leopard sharks, Triakis semifasciata. From videos of sharks turning laterally in yaw, performance was measured as turning radius, turning angle, angular speed of the head, and translational s...
Source: Zoology - October 5, 2011 Category: Zoology Authors: Porter ME, Roque CM, Long JH Tags: Zoology (Jena) Source Type: research
Zoology: How sounds make goldfish skittishEmail this article to a colleague.
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Nature 478, 7367 (2011). doi:10.1038/478009d
Startled goldfish dart away from sudden sounds because of sensory organs along the animals' flanks that sense sound vibrations and communicate with a pair of neurons in the brain.Donald Faber and his colleagues at the Albert Einstein College of Medicine in New York report
Source: Nature - October 5, 2011 Category: Research Tags: Research Highlights Source Type: research
Causes of bimodal stable isotope signatures in the feathers of a molt-migrant songbirdEmail this article to a colleague.
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Canadian Journal of Zoology, Volume 89, Issue 10, Page 951-959, October 2011.
Source: Canadian Journal of Zoology - October 4, 2011 Category: Zoology Tags: article Source Type: research
Contender pressure versus resource dispersion as predictors of territory size of coyotes (Canis latrans)Email this article to a colleague.
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Canadian Journal of Zoology, Volume 89, Issue 10, Page 960-967, October 2011.
Source: Canadian Journal of Zoology - October 4, 2011 Category: Zoology Tags: article Source Type: research
How small is too small? Incubation of large eggs by a small hostEmail this article to a colleague.
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Canadian Journal of Zoology, Volume 89, Issue 10, Page 968-975, October 2011.
Source: Canadian Journal of Zoology - October 4, 2011 Category: Zoology Tags: article Source Type: research
Reproduction and denning by urban and rural San Clemente Island foxes (Urocyon littoralis clementae)Email this article to a colleague.
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Canadian Journal of Zoology, Volume 89, Issue 10, Page 976-984, October 2011.
Source: Canadian Journal of Zoology - October 4, 2011 Category: Zoology Tags: article Source Type: research
Feeding performance in the Western Ribbon Snake (Thamnophis proximus): ontogeny and the effects of prey type and sizeEmail this article to a colleague.
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Canadian Journal of Zoology, Volume 89, Issue 10, Page 945-950, October 2011.
Source: Canadian Journal of Zoology - October 4, 2011 Category: Zoology Tags: article Source Type: research
Food limitation causes female haglids to mate more oftenEmail this article to a colleague.
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Canadian Journal of Zoology, Volume 89, Issue 10, Page 992-998, October 2011.
Source: Canadian Journal of Zoology - October 4, 2011 Category: Zoology Tags: article Source Type: research
Enzymatic flux capacities in hummingbird flight muscles: a “one size fits all” hypothesisEmail this article to a colleague.
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Canadian Journal of Zoology, Volume 89, Issue 10, Page 985-991, October 2011.
Source: Canadian Journal of Zoology - October 4, 2011 Category: Zoology Tags: article Source Type: research
Age-related male reproductive effort in two mountain ungulates of contrasting sexual size dimorphismEmail this article to a colleague.
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Canadian Journal of Zoology, Volume 89, Issue 10, Page 929-937, October 2011.
Source: Canadian Journal of Zoology - October 4, 2011 Category: Zoology Tags: article Source Type: research
Jaw muscle fiber type distribution in Hawaiian gobioid stream fishes: histochemical correlations with feeding ecology and behavior.Email this article to a colleague.
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Abstract
Differences in fiber type distribution in the axial muscles of Hawaiian gobioid stream fishes have previously been linked to differences in locomotor performance, behavior, and diet across species. Using ATPase assays, we examined fiber types of the jaw opening sternohyoideus muscle across five species, as well as fiber types of three jaw closing muscles (adductor mandibulae A1, A2, and A3). The jaw muscles of some species of Hawaiian stream gobies contained substantial red fiber components. Some jaw muscles always had greater proportions of white muscle fibers than other jaw muscles, independent of specie...
Source: Zoology - October 4, 2011 Category: Zoology Authors: Maie T, Meister AB, Leonard GL, Schrank GD, Blob RW, Schoenfuss HL Tags: Zoology (Jena) Source Type: research
Acoustic signals of baby black caimans.Email this article to a colleague.
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Abstract
In spite of the importance of crocodilian vocalizations for the understanding of the evolution of sound communication in Archosauria and due to the small number of experimental investigations, information concerning the vocal world of crocodilians is limited. By studying black caimans Melanosuchus niger in their natural habitat, here we supply the experimental evidence that juvenile crocodilians can use a graded sound system in order to elicit adapted behavioral responses from their mother and siblings. By analyzing the acoustic structure of calls emitted in two different situations ('undisturbed context',...
Source: Zoology - October 4, 2011 Category: Zoology Authors: Vergne AL, Aubin T, Taylor P, Mathevon N Tags: Zoology (Jena) Source Type: research
Scaling of In Vivo Muscle Velocity during Feeding in the Largemouth Bass, Micropterus salmoides (Centrarchidae)Email this article to a colleague.
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Physiological and Biochemical Zoology, Volume 0, Issue 0, Page 000, Ahead of Print.
Source: Physiological and Biochemical Zoology - October 3, 2011 Category: Zoology Tags: article Source Type: research
The correlation between subordinate fish eye colour and received attacks: a negative social feedback mechanism for the reduction of aggression during the formation of dominance hierarchies.Email this article to a colleague.
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Abstract
Eye darkening has been linked to social status in fish. The subordinate's eyes darken, while the eyes of the dominant fish become pale. Although this phenomenon has been described in salmonid fishes and in the African cichlid Nile tilapia Oreochromis niloticus, it is unclear whether eye darkening correlates with a reduction in aggressive behaviour. Thus, we evaluated the link between social status and eye darkening. We evaluated whether the eye colours of subordinate fish correlate with the frequency of received attacks in a neotropical fish, the pearl cichlid Geophagus brasiliensis. We paired pearl cichli...
Source: Zoology - October 3, 2011 Category: Zoology Authors: Miyai CA, Carretero Sanches FH, Costa TM, Colpo KD, Volpato GL, Barreto RE Tags: Zoology (Jena) Source Type: research
Social Environment and Agonistic Interactions: Strategies in a Small Social MammalEmail this article to a colleague.
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AbstractIn group‐living species, the development of agonistic interactions among conspecifics may be affected by socio‐ecological factors, such as size and composition of social group, and availability of nests and food. We analysed the importance of size and composition of social groups on agonistic interactions among males in the Southern mountain cavy (Microcavia australis). We made behavioural observations in four social groups of different size and composition. We recorded two types of agonistic interactions: agonistic displays and direct agonistic behaviours; both types increased in the breeding season. A social ...
Source: Ethology - October 3, 2011 Category: Zoology Authors: Natalia AndinoLaura ReusFlavio M. CappaValeria E. CamposStella M. Giannoni Tags: RESEARCH PAPER Source Type: research
Signalling and Sexual Conflict: Female Spiders Use Stridulation to Inform Males of Sexual ReceptivityEmail this article to a colleague.
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AbstractThe use of acoustic signals by males during courtship and mating is well known. Nevertheless, their association with female unwillingness to mate is much less studied. In spiders, stridulation during sexual interactions is relatively common in some groups, but mainly restricted to males. In the pholcid spider Holocnemus pluchei, both sexes have stridulatory organs. The aims of the present work were (1) to establish whether female stridulation occurs during intra‐ and inter‐sexual interactions, (2) to determine whether female reproductive status affects the likelihood that she will stridulate and (3) to determin...
Source: Ethology - October 3, 2011 Category: Zoology Authors: María Sofía DuttoLucia Calbacho‐RosaAlfredo V. Peretti Tags: RESEARCH PAPER Source Type: research
Even Weak Males Help Their Neighbours: Defence Coalitions in a Fiddler CrabEmail this article to a colleague.
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AbstractLarge male fiddler crabs sometimes help smaller neighbours to defend their territories against intruders. These coalitions occur when the helper is likely to defeat the intruder (helper larger than intruder) and the neighbour is likely to lose his territory without help (intruder larger than neighbour). Previous studies of coalitions have excluded males with regenerated claws. Such claws are weaker weapons that make the bearer competitively inferior. Here, we show that male Uca annulipes with regenerated claws are as likely as males with original claws to help their neighbours in territory defence, even though, as ...
Source: Ethology - October 3, 2011 Category: Zoology Authors: Jessica BoltonSophia CallanderMichael D. JennionsPatricia R.Y. Backwell Tags: RESEARCH PAPER Source Type: research
The imbalance of Th17/Th1/Tregs in patients with type 2 diabetes: relationship with metabolic factors and complicationsEmail this article to a colleague.
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Abstract Immune disorders are linked to the development of type 2 diabetes (T2D) and its complications. The relationship of CD4+CD25hi T regulatory cells (Treg) and pro-inflammatory Th17 and Th1 subsets in T2D patients with metabolic disorders and complications
need to be determined. The ratios of CD4+CD25hi Treg/Th17 cells and CD4+CD25hi Treg/Th1 cells, but not Th17/Th1 cells, were significantly decreased in T2D patients. The thymic output CD4+Foxp3+Helios+ Tregs were normal but peripheral induced CD4+Foxp3+Helios− Tregs were decreased in T2D patients. The Bcl-2/Bax ratio decreased in CD4+CD25hi Tregs in T2D...
Source: Journal of Molecular Medicine - October 1, 2011 Category: Molecular Biology Tags: Journal of Molecular Medicine Source Type: research
Conservation genetics of South American aquatic mammals: an overview of gene diversity, population structure, phylogeography, non‐invasive methods and forensicsEmail this article to a colleague.
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ABSTRACT1Most aquatic mammals have high dispersal potential, and there are often severe conservation concerns related to their legal or illegal harvesting. Therefore, economic, social and forensic factors often arise in decisions relating to their population management. Molecular markers are essential tools in modern conservation genetics, revealing previously unknown aspects of aquatic mammal behaviour, natural history, population structure and demography. Molecular markers also have been used to define management units, to recognize taxonomic units, to conduct forensic analyses and to control illegal wildlife trade, prov...
Source: Mammal Review - October 1, 2011 Category: Zoology Authors: Larissa Rosa de OLIVEIRARocio LOIZAGA DE CASTROSusana CÁRDENAS‐ALAYZASandro Luis BONATTO Source Type: research
Mammalian hybrid zones: a reviewEmail this article to a colleague.
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ABSTRACT1A hybrid zone is a region where interbreeding occurs between two or more genetically distinct populations. Recent studies have shown that mammalian hybrid zones occur in nature more frequently than previously thought.2I summarize the history of research on mammalian hybrid zones, highlighting contributions that demonstrate genetic, behavioural and environmental mechanisms responsible for spatial distribution of genotypes, maintenance or elimination of reproductive barriers and evolutionary outcomes of hybridization.3The role of hybridization in mammalian evolution, adaptation and diversification is demonstrated by...
Source: Mammal Review - October 1, 2011 Category: Zoology Authors: Quinn R. SHURTLIFF Source Type: research
Observations on the ultrastructure and distribution of chromatophores in the skin of cheloniansEmail this article to a colleague.
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AbstractAlibardi, L. 2011. Observations on the ultrastructure and distribution of chromatophores in the skin of chelonians. —Acta Zoologica (Stockholm) 00:1–11.The cytology and distribution of chromatophores responsible for skin pigmentation in chelonians is analyzed. Epidermal melanocytes are involved in the formation of dark spots or stripes in growing shelled and non‐shelled skin. Melanocytes rest in the basal layer of the epidermis and transfer melanosomes into keratinocytes during epidermal growth. Dermal melanophores and other chromatophores instead remain in the dermis and form the gray background of the skin....
Source: Acta Zoologica - October 1, 2011 Category: Zoology Authors: Lorenzo Alibardi Source Type: research
Morphometric differentiation of Pseudocalanus minutus populations in the Barents SeaEmail this article to a colleague.
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AbstractDvoretsky VG. and Dvoretsky AG. 2011. Morphometric differentiation of Pseudocalanus minutus populations in the Barents Sea. —Acta Zoologica (Stockholm) 00: 1–12.We investigated spatial variations in the morphometric characteristics (total length of body, lengths of cephalothorax, abdomen and antennules, and their relative proportions) of Pseudocalanus minutus, an abundant copepod species across the Barents Sea in August–September 2007. Females were found to have higher values for the measured parameters than males. The average absolute morphometric characters of both sexes increased from the south to the nort...
Source: Acta Zoologica - October 1, 2011 Category: Zoology Authors: Vladimir G. DvoretskyAlexander G. Dvoretsky Source Type: research
A plea for ‘genealogical thinking’ in comparative biology – a rebuttal to the reply of Szucsich, Wirkner, and Pass to my article ‘Deconstructing Morphology’Email this article to a colleague.
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AbstractScholtz G. in press. A plea for ‘genealogical thinking’ in comparative biology – a rebuttal to the reply of Szucsich, Wirkner, and Pass to my article ‘Deconstructing Morphology’. —Acta Zoologica (Stockholm) 00: 1–4.Szucsich et al. (in press) claim that – in contrast to my statement – morphological thinking has to be ‘cladistic.’ Based on this premise, they stress the difference between the relationships among states of characters versus those among structures assigned to the same character state as implemented in numerical cladistic reasoning. SEA claim that my approach to the homology concep...
Source: Acta Zoologica - October 1, 2011 Category: Zoology Authors: Gerhard Scholtz Tags: REPLY Source Type: research
Effects of diets supplemented with zinc and manganese on performance and related parameters in laying hens‡Email this article to a colleague.
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This study was conducted to investigate how to supplement Zn and Mn in the diets without Fe supplementation. In experiment 1, 420 18‐week Lohmann Brown layers were fed a basal diet or a basal diet supplemented with 30–0, 65–30 and 100–60 mg/kg of Zn and Mn, respectively. In experiment 2, 360 40‐week Lohmann Brown layers were fed a basal diet or a basal diet supplemented with 15–0, 35–0 and 55–15 mg/kg of Mn and Zn, respectively. Minerals were supplemented in the form of sulfate. Egg production was improved by supplementing 30 mg/kg Zn or 65 mg/kg Zn in combination with 30 mg/kg Mn in experiment on...
Source: Animal Science Journal - October 1, 2011 Category: Zoology Authors: Xiaojun YANGLelun ZHONGXiaofang ANNan ZHANGLimin ZHANGJincheng HANJunhu YAOCharron COTEYajing SUN Source Type: research
Deconstructing morphology: reply to Scholtz (2010)Email this article to a colleague.
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Szucsich, N.U., Wirkner C.S. and Pass G. 2011. Deconstructing morphology: reply to Scholtz (2010). —Acta Zoologica (Stockholm) 00: 1–3AbstractWhenever concepts are taken over into new fields scientists have to take care that these concepts do not become unsubstantial due to ambiguities regarding their applicability. Here we argue why it makes sense to define the homology‐concept in a way, so it is applicable for phylogenetic purposes. If used to define the relation among structures of organisms assigned to the same character state of a phylogenetic character, homology has to represent an equivalence relation, with th...
Source: Acta Zoologica - October 1, 2011 Category: Zoology Authors: Nikolaus U. SzucsichChristian S. WirknerGünther Pass Tags: COMMENT Source Type: research
Hypsodonty and tooth facet development in relation to diet and habitat in herbivorous ungulates: implications for understanding tooth wearEmail this article to a colleague.
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ABSTRACT1The evolution of high‐crowned teeth or hypsodonty in herbivorous mammals is widely interpreted as a species‐specific adaptation to increasingly wear‐inducing diets and environments at evolutionary time scales, with internal abrasives (such as phytoliths in grasses) and/or external abrasives (such as dust or grit) as putative causative factors. The mesowear score (MS) instead describes tooth wear experienced by individual animals during their lifetime.2Under the assumption that the abrasiveness that causes the MS in individuals is the same abrasiveness to which species adapted by evolving hypsodonty, one woul...
Source: Mammal Review - October 1, 2011 Category: Zoology Authors: Thomas M. KAISERDennis W. H. MÜLLERMikael FORTELIUSEllen SCHULZDaryl CODRONMarcus CLAUSS Source Type: research
Immunological characteristics and response to lipopolysaccharide of mouse lines selectively bred with natural and acquired immunitiesEmail this article to a colleague.
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ABSTRACTGenetic improvement of resistance to infectious diseases is a challenging goal in animal breeding. Infection resistance involves multiple immunological characteristics, including natural and acquired immunity. In the present study, we developed an experimental model based on genetic selection, to improve immunological phenotypes. We selectively established three mouse lines based on phagocytic activity, antibody production and the combination of these two phenotypes. We analyzed the immunological characteristics of these lines using a lipopolysaccharide (LPS), which is one of the main components of Gram‐negative ...
Source: Animal Science Journal - October 1, 2011 Category: Zoology Authors: Hiroki NARAHARAEri SAKAIMasafumi KATAYAMAYukiko OHTOMOKanako YAMAMOTOMiki TAKEMOTOHisashi ASOShyuichi OHWADAYasuaki MOHRIKatsuhiko NISHIMORIEmiko ISOGAITakahiro YAMAGUCHITomokazu FUKUDA Source Type: research
Spermatozoa ultrastructure of the pink shrimp Farfantepenaeus paulensis (Decapoda: Dendrobranchiata)Email this article to a colleague.
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AbstractBraga, A.L., Nakayama, C.L., Suita de Castro, L.A. and Wasielesky, W. 2011. Spermatozoa ultrastructure of the pink shrimp Farfantepenaeus paulensis (Decapoda: Dendrobranchiata). —Acta Zoologica (Stockholm) 00: 1–6.The spermatozoa ultrastructure of the pink shrimp Farfantepenaeus paulensis was investigated in this morphological study. Spermatophores and spermatozoa were analyzed by electron microscopy. The pink shrimp spermatophore is divided into two regions: the appendage and the spermatophore main body, where spermatozoa are grouped in a spermatic mass. Pink shrimp spermatozoa are unistellate and are composed...
Source: Acta Zoologica - October 1, 2011 Category: Zoology Authors: André L. BragaCintia L. NakayamaLuis A. Suita de CastroWilson Wasielesky Source Type: research
The contribution of developmental palaeontology to extensions of evolutionary theoryEmail this article to a colleague.
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AbstractWilson, L.A.B. 2011. The contribution of developmental palaeontology to extensions of evolutionary theory. —Acta Zoologica (Stockholm) 00: 1–7.Evo‐devo is featuring prominently in current discussion to extend evolutionary theory. Developmental palaeontology, the study of life history evolution and ontogeny in fossils, remains an area of investigation that could benefit from, but also illuminate, the discourse and research agenda of evo‐devo. Understanding how and why evolution proceeds in phenotypic space is an important goal of evo‐devo and one that can be significantly enriched through the examination o...
Source: Acta Zoologica - October 1, 2011 Category: Zoology Authors: Laura A. B. Wilson Source Type: research
Sexual conflict in mammals: consequences for mating systems and life historyEmail this article to a colleague.
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ABSTRACT1Sexual conflict theory suggests that male and female interests often diverge, causing selection to favour sex‐specific reproductive strategies that maximize the fitness of an individual at the expense of its mate. Sexually antagonistic selection can lead to conflicts over the timing and frequency of mating events, mate choice and the delivery of parental care.2This antagonistic view of reproduction has received little attention in discussions of the evolution of mammalian mating systems. Reproduction in mammals, more than in other organisms, is characterized by asymmetry in parental investment between the sexes....
Source: Mammal Review - October 1, 2011 Category: Zoology Authors: Edith D. ALOISE KINGPeter B. BANKSRobert C. BROOKS Source Type: research
Effects of plane of nutrition on slaughtering traits and meat characteristics in Murrah graded male buffalo (Bubalus bubalis) calves in NepalEmail this article to a colleague.
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ABSTRACTAn experiment was conducted using 17 male buffalo calves to assess the effects of plane of nutrition on slaughtering traits and meat characteristics. To attain 250 kg body weight (BW), the calves were allocated into three groups: high (H), low‐high (L‐H) and low (L) corresponding to concentrate levels receiving the concentrate at 1.50% of BW, 0.75% of BW until 190 kg BW and 1.50% thereafter, and 0.75% of BW, respectively. The animals had ad libitum access to urea‐treated rice straw. No significant differences of hot carcass weight, dressing percentage and lean fat–bone yields were observed among the tre...
Source: Animal Science Journal - October 1, 2011 Category: Zoology Authors: Hajime KUMAGAIBodh R. BARALTatsu SHIINONaba R. DEVKOTAKazato OISHIHiroyuki HIROOKA Source Type: research
Autoclaved, previously used intravaginal progesterone devices induces estrus and ovulation in anestrous Toggenburg goats.Email this article to a colleague.
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In conclusion, autoclaved, previously used intravaginal progesterone-releasing devices resulted in significant lesser plasma progesterone concentrations than new devices, but were similarly effective in inducing estrus and ovulation in anestrous goats.
PMID: 22005251 [PubMed - as supplied by publisher]
Source: Animal Reproduction Science - October 1, 2011 Category: Zoology Authors: Souza JM, Torres CA, Maia AL, Brandão FZ, Bruschi JH, Viana JH, E Oba , Fonseca JF Tags: Anim Reprod Sci Source Type: research
Effect of post-mortem time on post-thaw characteristics of Spanish ibex (Capra pyrenaica) spermatozoa.Email this article to a colleague.
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Abstract
Viable epididymal sperm can be obtained in the Spanish ibex during 24h after death, but it has been observed a significant effect of the post-mortem time on fertility success, so only goats inseminated with semen recovery during the first 8h became pregnant. The aim of this study was to determine the effect of post-mortem time on epididymal semen samples from of Spanish ibex. For this purpose, sperm samples from 36 males were collected at different post-mortem times, from 2 to 24h, and cryopreserved. Thawed samples were incubated for 2h at 37°C without dilution or after dilution in a modified Tyrode mediu...
Source: Animal Reproduction Science - October 1, 2011 Category: Zoology Authors: Fernández-Santos MR, Soler AJ, Ramón M, Ros-Santaella JL, Maroto-Morales A, García-Álvarez O, Bisbal A, Garde JJ, Coloma MA, Santiago-Moreno J Tags: Anim Reprod Sci Source Type: research
Recovery and status of native and introduced beavers Castor fiber and Castor canadensis in France and neighbouring countriesEmail this article to a colleague.
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ABSTRACT1The Eurasian beaver Castor fiber suffered a drastic reduction in both geographical range and population size, due to human persecution, until the end of the 19th century. After the adoption of protection measures, natural expansion and reintroductions led to the recovery of this species over much of its European range.2We review historical events that led to the recovery of beavers in France, and summarize the status of beavers in various river systems. Beaver establishment in France is a story of overall success: several major river systems are presently occupied, so that the species is no longer at risk in Franc...
Source: Mammal Review - October 1, 2011 Category: Zoology Authors: Maeva DEWASJan HERRLaurent SCHLEYChristof ANGSTBenoît MANETPhilippe LANDRYMichel CATUSSE Source Type: research
Association of BoLA‐DRB3 alleles with mastitis resistance and susceptibility in Japanese Holstein cowsEmail this article to a colleague.
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In this study, 714 cows from 26 dairy herds were reclassified as healthy or mastitic cows on the basis of long‐term somatic cell count (SCC) in milk. Cows with more than three consecutive lactation records of SCC from the first or second to fifth lactation, were selected, and their BoLA‐DRB3 (DRB3) alleles were identified using polymerase chain reaction‐restriction fragment length polymorphism (PCR‐RFLP) method. Cows with an SCC of < 200 000 cells/mL in all monthly records were classified as healthy (n = 91). Cows with an SCC of > 300 000 cells/mL in two consecutive tests or four non‐consecu...
Source: Animal Science Journal - October 1, 2011 Category: Zoology Authors: Tatsuyuki YOSHIDAHiroki FURUTAYasuko KONDOHarutaka MUKOYAMA Source Type: research
