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This page shows you the most recent publications within this specialty of the MedWorm directory. This is page number 38.

High cytosolic free calcium level signals apoptosis through mitochondria-caspase mediated pathway in rat eggs cultured in vitro
Abstract The present study was aimed to find out whether an increase of cytosolic free calcium level induces egg apoptosis through mitochondria-caspase mediated pathway. To increase cytosolic free calcium level and morphological apoptotic changes, ovulated eggs were cultured in Ca2+/Mg2+ free media-199 with or without various concentrations of calcium ionophore (0.5, 1, 2, 3, 4 μM) for 3 h in vitro. The morphological apoptotic changes, cytosolic free calcium level, hydrogen peroxide (H2O2) concentration, catalase activity, cytochrome c concentration, caspase-9 and caspase-3 activities and DNA fragm...
Source: Apoptosis - February 7, 2012 Category: Molecular Biology Tags: Apoptosis Source Type: research

Sound or Silence: Call Recognition in the Temporal Domain by the Frog Allobates femoralis
AbstractAcoustic communication often mediates agonistic interactions in territorial species. Because both the reaction to potential intruders and the lack thereof are costly, mechanisms that allow recognition of conspecific signals should be evident in intrasexual communication systems. While the spectral domain of the recognition space of the frog Allobates femoralis appears asymmetrically shaped in a way that reduces masking interference by the often syntopic frog Ameerega trivittata, frequency alone does not appear to account for the correct identification of conspecific intruders (Amézquita et al., Animal Behaviour, ...
Source: Ethology - February 7, 2012 Category: Zoology Authors: Alejandro VélezWalter HödlAdolfo Amézquita Tags: RESEARCH PAPER Source Type: research

Integrating multiple data sources to assess the distribution and abundance of bottlenose dolphins Tursiops truncatus in Scottish waters
ABSTRACT1The distribution, movements and abundance of highly mobile marine species such as bottlenose dolphins Tursiops truncatus are best studied at large spatial scales, but previous research effort has generally been focused on relatively small areas, occupied by populations with high site fidelity.2We aimed to characterize the distribution, movements and abundance of bottlenose dolphins around the coasts of Scotland, exploring how data from multiple sources could be integrated to build a broader‐scale picture of their ecology.3We reviewed existing historical data, integrated data from ongoing studies and developed ne...
Source: Mammal Review - February 6, 2012 Category: Zoology Authors: Barbara CHENEY, Paul M. THOMPSON, Simon N. INGRAM, Philip S. HAMMOND, Peter T. STEVICK, John W. DURBAN, Ross M. CULLOCH, Simon H. ELWEN, Laura MANDLEBERG, Vincent M. JANIK, Nicola J. QUICK, Valentina ISLAS‐VILLANUEVA, Kevin P. ROBINSON, Marina COSTA, So Source Type: research

Key factors and related principles in the conservation of large African carnivores
We present these key factors in a model illustrating the levels of impact on large African carnivore conservation.4We identify the key principle that underpins each factor and its implications for both large carnivore conservation and human–carnivore conflict.5We provide a synthesis of the key factors and related principles in large African carnivore conservation and highlight the importance of the site‐specific and species‐specific context in conservation policy and implementation, formulated through an interdisciplinary and adaptive approach.
Source: Mammal Review - February 6, 2012 Category: Zoology Authors: H. E. K. WINTERBACH, C. W. WINTERBACH, M. J. SOMERS, M. W. HAYWARD Source Type: research

Integrating multiple data sources to assess the distribution and abundance of bottlenose dolphins Tursiops truncatus in Scottish waters
ABSTRACT1The distribution, movements and abundance of highly mobile marine species such as bottlenose dolphins Tursiops truncatus are best studied at large spatial scales, but previous research effort has generally been focused on relatively small areas, occupied by populations with high site fidelity.2We aimed to characterize the distribution, movements and abundance of bottlenose dolphins around the coasts of Scotland, exploring how data from multiple sources could be integrated to build a broader‐scale picture of their ecology.3We reviewed existing historical data, integrated data from ongoing studies and developed ne...
Source: Mammal Review - February 6, 2012 Category: Zoology Authors: Barbara CHENEYPaul M. THOMPSONSimon N. INGRAMPhilip S. HAMMONDPeter T. STEVICKJohn W. DURBANRoss M. CULLOCHSimon H. ELWENLaura MANDLEBERGVincent M. JANIKNicola J. QUICKValentina ISLAS‐VILLANUEVAKevin P. ROBINSONMarina COSTASonja M. EISFELDAlice WALTERSC Source Type: research

Prolonged Parental Feeding in Tool‐Using New Caledonian Crows
AbstractAccording to life‐history theory, the duration of extended parental feeding is determined by the costs and benefits of maximising reproductive success. Therefore, the length of regular parental provisioning should be correlated with the time required for juveniles to acquire the skills that they need to be independent. The relatively few cases of extremely prolonged parental feeding in both land and sea birds appear to be consistent with this prediction because they are associated with learning‐intensive foraging techniques. New Caledonian crows have the most intricate tool manufacture techniques amongst non‐...
Source: Ethology - February 5, 2012 Category: Zoology Authors: Gavin R. Hunt, Jennifer C. Holzhaider, Russell D. Gray Tags: RESEARCH PAPER Source Type: research

Proportional underwater call type usage by Weddell seals (Leptonychotes weddellii) in breeding and nonbreeding situations
Canadian Journal of Zoology, Volume 90, Issue 2, Page 237-247, February 2012.
Source: Canadian Journal of Zoology - February 3, 2012 Category: Zoology Tags: article Source Type: research

Beach and demersal spawning in capelin (Mallotus villosus) on the northeast Newfoundland coast: egg developmental rates and mortality
Canadian Journal of Zoology, Volume 90, Issue 2, Page 248-256, February 2012.
Source: Canadian Journal of Zoology - February 3, 2012 Category: Zoology Tags: article Source Type: research

Incorporating behavior-based indices of connectivity into spatially explicit population models
Canadian Journal of Zoology, Volume 90, Issue 2, Page 222-236, February 2012.
Source: Canadian Journal of Zoology - February 3, 2012 Category: Zoology Tags: article Source Type: research

Prolonged life span among endemic Gasterosteus populations
Canadian Journal of Zoology, Volume 90, Issue 2, Page 284-290, February 2012.
Source: Canadian Journal of Zoology - February 3, 2012 Category: Zoology Tags: article Source Type: research

Incubation patterns of a shorebird with rapid multiple clutches, the Mountain Plover (Charadrius montanus)
Canadian Journal of Zoology, Volume 90, Issue 2, Page 257-266, February 2012.
Source: Canadian Journal of Zoology - February 3, 2012 Category: Zoology Tags: article Source Type: research

Ionic regulation and shell mineralization in the bivalve Anodonta cygnea (swan mussel) following heavy-metal exposure
Canadian Journal of Zoology, Volume 90, Issue 2, Page 267-283, February 2012.
Source: Canadian Journal of Zoology - February 3, 2012 Category: Zoology Tags: article Source Type: research

Multiple factors limit use of local sites by Elliot’s short-tailed shrews (Blarina hylophaga) in tallgrass prairie
Canadian Journal of Zoology, Volume 90, Issue 2, Page 210-221, February 2012.
Source: Canadian Journal of Zoology - February 3, 2012 Category: Zoology Tags: article Source Type: research

Effects of supplementation with preferred foods on the reproductive axis of American Goldfinches (Spinus tristis)
Canadian Journal of Zoology, Volume 90, Issue 2, Page 203-209, February 2012.
Source: Canadian Journal of Zoology - February 3, 2012 Category: Zoology Tags: article Source Type: research

Genetically modified growth affects allometry of eye and brain in salmonids
Canadian Journal of Zoology, Volume 90, Issue 2, Page 193-202, February 2012.
Source: Canadian Journal of Zoology - February 3, 2012 Category: Zoology Tags: article Source Type: research

Embryonic and Fetal Development in – Pigmy Rice Rat – Oligoryzomys sp. (Rodentia, Sigmodontinae) and its Significance for Being a new Experimental Model
SummaryOligoryzomys (Cricetidae, Sigmodontinae) is a common rodent genus from South America that includes a couple of very similar species. Related species have been used as experimental model for understanding several diseases for which these species are reservoirs. In order to provide a better understanding of the embryological aspects of this group, herein we showed data on the embryonic and fetal development in Oligoryzomys sp. Eight specimens of different stages of gestation were obtained from the Collection of the Zoology Museum of University of Sao Paulo, Brazil. Gestational ages were estimated by crown‐rump‐len...
Source: Anatomia, Histologia, Embryologia: Journal of Veterinary Medicine Series C - February 2, 2012 Category: Veterinary Research Authors: P. O. Favaron, M. N. Rodrigues, M. F. Oliveira, C. M. Biasi, M. A. Miglino Tags: Original Article Source Type: research

Can management regulate the population size of wild reindeer (Rangifer tarandus) through harvest?
Canadian Journal of Zoology, Volume 0, Issue 0, Page 163-171, e-First articles.
Source: Canadian Journal of Zoology - February 1, 2012 Category: Zoology Tags: article Source Type: research

Vaccination programs for reproductive disorders of small ruminants.
Abstract Vaccines are available for the control of contagious epididymitis and abortion in small ruminants, although many of them have significant limitations either in efficacy or safety to both the animals vaccinated and to the people handling the vaccine or animals. Shelf-life of vaccines should be extended and improved, so that the vaccine remains effective with longer term storage and ideally without refrigeration, so that use in under-developed rural areas is not restricted (e.g., Brucella melitensis, Toxoplasma gondii). The vaccines should not be dangerous for veterinarians or producers to handle (again as e...
Source: Animal Reproduction Science - February 1, 2012 Category: Zoology Authors: Menzies PI Tags: Anim Reprod Sci Source Type: research

Assisted reproductive technologies in the reproductive management of small ruminants.
Abstract In modern agriculture, assisted reproductive technologies are being used for out of season oestrus induction, enhancement of reproductive performance and genetic improvement. In addition, they can have substantial contribution in preservation of endangered species or breeds, as well as in eradication programs of various diseases. While their applications are widespread in cattle, in small ruminants it is almost restricted to artificial insemination. The main limitations of a wider application in small ruminants are the naturally occurring anoestrus period, the variability of response to superovulatory trea...
Source: Animal Reproduction Science - February 1, 2012 Category: Zoology Authors: Amiridis GS, Cseh S Tags: Anim Reprod Sci Source Type: research

Cryopreservation of immature buffalo oocytes: Effects of cytochalasin B pretreatment on the efficiency of cryotop and solid surface vitrification methods
In conclusion, a higher survival rate of oocytes after vitrification and IVM was obtained in the CT group compared with that in the SSV group, indicating the superiority of the CT method. Pretreatment with CB did not increase the viability, maturation or embryo development of vitrified oocytes.
Source: Animal Science Journal - February 1, 2012 Category: Zoology Authors: Yuanyuan LIANGDamrongrak RAKWONGRITTatsanee PHERMTHAITamas SOMFAITakashi NAGAIRangsun PARNPAI Source Type: research

The effect of dietary turmeric on antioxidant properties of thigh meat in broiler chickens after slaughter
In conclusion, dietary consumption of 5 mg/kg TRP can increases the thigh meat shelf‐life storage and quality in broiler chickens after slaughter.
Source: Animal Science Journal - February 1, 2012 Category: Zoology Authors: Mohsen DANESHYAR Source Type: research

Assessment of reproduction and growth performance of offspring derived from somatic cell cloned pigs
In this study, we compared the reproductive and growth performance of American Large White boars cloned by SCNT with the donor boar, and analyzed the test parameters, including semen quality, re‐service rate, rate of parturition, and average daily gain. The results showed that these cloned boars and the donor boar had no significant differences in the tests (P > 0.05) and the growth performance of their offspring was similar to the naturally bred American Large White pigs. In summary, the reproductive and growth performance of cloned pigs are similar to the donor pig and within the normal range. This suggests that...
Source: Animal Science Journal - February 1, 2012 Category: Zoology Authors: Kui HUQingran KONGZeping ZHAOXinyu LUBiao LIUYutian LIHongbin WANGZhonghua LIU Source Type: research

Innate predator recognition in giant pandas.
Abstract Innate predator recognition confers a survival advantage to prey animals. We investigate whether giant pandas exhibit innate predator recognition. We analyzed behavioral responses of 56 naive adult captive giant pandas (Ailuropoda melanoleuca), to urine from predators and non-predators and water control. Giant pandas performed more chemosensory investigation and displayed flehmen behaviors more frequently in response to predator urine compared to both non-predator urine and water control. Subjects also displayed certain defensive behaviors, as indicated by vigilance, and in certain cases, fleeing behaviors...
Source: Zoological Science - February 1, 2012 Category: Zoology Authors: Du Y, Huang Y, Zhang H, Li D, Yang B, Wei M, Zhou Y, Liu Y Tags: Zoolog Sci Source Type: research

Historical Effects on Local Variation in Walnut-Feeding Behavior by the Japanese Wood Mouse, Apodemus speciosus.
In this study, to examine local variation in the ability to eat walnuts, feeding behavior was compared among nine wood mouse populations, four from mainland Honshu, where the walnut tree is distributed, and five from the Izu Islands (30-100 km south of Honshu), which lack the tree species. To avoid the effects of pre-capture experience with walnuts, mice from areas lacking the walnut trees were used for testing, even in the Honshu sites. Most mice from Honshu were able to eat walnuts after a 14-day training period, whereas most insular mice could not, with the exception of mice on Kouzushima Island. An analysis of the popu...
Source: Zoological Science - February 1, 2012 Category: Zoology Authors: Takechi R, Hayashi F Tags: Zoolog Sci Source Type: research

Binding properties of thyroxine to nuclear extract from sea urchin larvae.
Abstract We previously reported that thyroid hormones are involved in the formation of the adult rudiment and adult-type skeleton in sea urchin larvae, as well as in the resorption of larval tissues. In the present study, to search for the presence of thyroid hormone receptor in sea urchin larvae, we performed a ligand-binding assay between radiolabeled thyroid hormones and nuclear extracts from the larvae of the sea urchin Hemicentrotus pulcherrimus. The presence of binding sites with a high affinity to thyroxine (T4) was detected in the nuclear extract, but not in the cytoplasmic fraction. The dissociation consta...
Source: Zoological Science - February 1, 2012 Category: Zoology Authors: Saito M, Yamasu K, Suyemitsu T Tags: Zoolog Sci Source Type: research

Expression of β-adrenergic-like Octopamine Receptors during Drosophila Development.
Abstract An invertebrate biogenic amine, octopamine, plays diverse roles in multiple physiological processes (e.g. neurotransmitter, neuromodulator, and circulating neurohormone). Octopamine is thought to function by binding to G-protein-coupled receptors. In Drosophila, three β-adrenergic-like octopamine receptors (Octβ1R, Octβ2R, and Octβ3R) have been identified. We investigated the expression of three OctβR genes in embryos, larvae, and adults. These OctβRs showed distinct expression patterns in the central nervous system (CNS) throughout development, and Octβ3R expression was evident in an endocrine orga...
Source: Zoological Science - February 1, 2012 Category: Zoology Authors: Ohhara Y, Kayashima Y, Hayashi Y, Kobayashi S, Yamakawa-Kobayashi K Tags: Zoolog Sci Source Type: research

Complete Mitochondrial Genome of Locusta Migratoria Migratoria (Orthoptera: Oedipodidae): Three tRNA-Like Sequences on the N-Strand.
Abstract The complete 16053 bp mitochondrial genome (mitogenome) sequence of Locusta migratoria migratoria has been determined. This mitogenome contains the base compositional biases and codon usage typical of metazoans, and the RSCU values indicate a negative correlation with the C and G contents in codon. The orientation and gene order of the L. migratoria migratoria is identical to Locusta migratoria migratoiodes. An unusual feature of the L. migratoria migratoria mitogenome is the presence of three tRNA-like structures on the N-strand: one tRNA(Ile)-like and two tRNA(Leu(CUN))-like sequences. The tRNA-like sequ...
Source: Zoological Science - February 1, 2012 Category: Zoology Authors: Ye HY, Xiao LL, Zhou ZJ, Huang Y Tags: Zoolog Sci Source Type: research

The Postbranchial Digestive Tract of the Ascidian, Polyandrocarpa misakiensis (Tunicata: Ascidiacea). 2. Stomach.
Abstract The organization of the stomach in the compound styelid ascidian, Polyandrocarpa misakiensis, is described, and the morphology and cell types of the stomach is discussed from the phylogenetic viewpoint. The stomach is a sac-like organ whose wall is formed into longitudinal folds. The stomach consists of external and internal epithelium. The internal epithelium is simple columnar, except for the bottom of the folds. There are five cell types: absorptive cells, zymogenic cells, endocrine cells, ciliated mucous cells, and undifferentiated cells. The absorptive cells have numerous microvilli. The apical region...
Source: Zoological Science - February 1, 2012 Category: Zoology Authors: Koyama H, Taneda Y, Ishii T Tags: Zoolog Sci Source Type: research

Spatial Framework of Nine Distinct Local Populations of the Japanese Dormouse Glirulus japonicus Based on Matrilineal Cytochrome b and Patrilineal SRY Gene Sequences.
In this study, we extended this analysis using mitochondrial cytochrome b gene sequences (n = 96) and Y-chromosome-specific SRY gene sequences (n = 22) from individuals collected from Honshu, Shikoku, Kyushu, and Oki Dogo I. The cytochrome b sequence data allowed us to define precise geographic ranges of the six previously known and three newly found distinct matrilineal lineages: northeastern Honshu (I), east-central Honshu (II), west-central Honshu and the Kii Peninsula (III), the western part of Honshu (IV), Shikoku (V), westernmost Honshu and Kyushu (VI), the northern part of central Honshu (VII), the southern part of ...
Source: Zoological Science - February 1, 2012 Category: Zoology Authors: Yasuda SP, Iwabuchi M, Aiba H, Minato S, Mitsuishi K, Tsuchiya K, Suzuki H Tags: Zoolog Sci Source Type: research

Histological Observation of the Urogenital Papillae in the Bi-Directional Sex-Changing Gobiid Fish, Trimma okinawae.
Abstract The gobiid fish Trimma okinawae changes its sex bi-directionally according to its social status. Morphological changes in the urinogenital papillae (UGP) of this fish have been reported during sex change. However, there have been no detailed observations of such changes. Here, we histologically examined the UGP structure of male- and female-phase fish. UGPs of fish in female and male phase contained both oviducts and sperm ducts. Both ducts were coalesced into one duct within the posterior region of the UGP. Female-phase fish had many longitudinal folds in the hypertrophied tunica mucosa of the oviduct, wh...
Source: Zoological Science - February 1, 2012 Category: Zoology Authors: Kobayashi Y, Usami T, Sunobe T, Manabe H, Nagahama Y, Nakamura M Tags: Zoolog Sci Source Type: research

A New Species of Paramacrochiron (Copepoda: Cyclopoida: Macrochironidae) Associated with the Rhizostome Medusa Rhopilema hispidum Collected from the Gulf of Thailand, with a Phylogenetic Analysis of the Family Macrochironidae.
Abstract Paramacrochiron thailandicum n. sp. (Copepoda: Cyclopoida: Macrochironidae) is described from the rhizostome medusa Rhopilema hispidum occurring in the Gulf of Thailand. The new species is distinguishable from other congeners mainly by detailed features of the fourth legs and the urosome in both sexes. Copepodid and adult stages of the genus Paramacrochiron seem to be host-specific to rhizostome medusae, but may spend periods free in the plankton or benthos during the absence of the host. A cladistic analysis shows that the Macrochironidae comprises two main lineages. Paramacrochiron is recovered as a mono...
Source: Zoological Science - February 1, 2012 Category: Zoology Authors: Ohtsuka S, Boxshall GA, Srinui K Tags: Zoolog Sci Source Type: research

Evidence of Genetic and Reproductive Isolation between Two Morphs of Subtropical-Dominant Coral Acropora solitaryensis in the Non-Reef Region of Japan.
Abstract We reveal the existence of a cryptic species of Acropora solitaryensis ( Veron and Wallace, 1984 ), a dominant species in high-latitude coral communities. Although some morphs, such as arborescent table (AR), solid plate (PL), and intermediate (IM) forms, had been known in this species, it was unclear whether these are reproductively isolated from one another. Here, potential reproductive exchange between two representative morphs, AR and PL, were examined using genetic and reproductive methods. Molecular phylogenetic analyses using both mitochondrial and nuclear molecular markers (mitochondrial control re...
Source: Zoological Science - February 1, 2012 Category: Zoology Authors: Suzuki G, Fukami H Tags: Zoolog Sci Source Type: research

Do fathead minnows, Pimephales promelas Rafinesque, alter their club cell investment in responses to variable risk of infection from Saprolegnia?
AbstractFish in the Superorder Ostariophysi possess large epidermal club cells that release chemical cues warning nearby conspecifics of danger. Despite the long‐held assumption that such club cells evolved under the selective force of predation, recent studies demonstrated that predation has no effect on club cell investment. Rather, club cells have an immune function and cell production may be stimulated by skin‐penetrating pathogens and parasites. The current work investigates whether fathead minnows, Pimephales promelas, alter their club cell characteristics based on variation in infection risk. In a 2 × 3 des...
Source: Journal of Fish Diseases - February 1, 2012 Category: Zoology Authors: R J PollockM S PollockM C O FerrariS G W KaminskyjD P Chivers Source Type: research

Non‐sex‐biased Dominance in a Sexually Monomorphic Electric Fish: Fight Structure and Submissive Electric Signalling
AbstractMales and females commonly compete for limited resources. When interaction costs are similar for both sexes and there are no sexual differences in resource value estimation, a non‐sex‐biased dominance is expected. Moreover, only non‐sex‐biased assessment of contenders fighting ability (Resource Holding Potential, RHP) should influence contest decisions. To test these predictions, we evaluated non‐breeding agonistic intra‐ and intersexual dyadic interactions in the weakly electric fish, Gymnotus omarorum. During the non‐breeding season, resource value is not expected to depend on individuals’ reprodu...
Source: Ethology - February 1, 2012 Category: Zoology Authors: Gervasio BatistaLucía ZubizarretaRossana PerroneAna Silva Tags: RESEARCH PAPER Source Type: research

Prolonged Parental Feeding in Tool‐Using New Caledonian Crows
AbstractAccording to life‐history theory, the duration of extended parental feeding is determined by the costs and benefits of maximising reproductive success. Therefore, the length of regular parental provisioning should be correlated with the time required for juveniles to acquire the skills that they need to be independent. The relatively few cases of extremely prolonged parental feeding in both land and sea birds appear to be consistent with this prediction because they are associated with learning‐intensive foraging techniques. New Caledonian crows have the most intricate tool manufacture techniques amongst non‐...
Source: Ethology - February 1, 2012 Category: Zoology Authors: Gavin R. HuntJennifer C. HolzhaiderRussell D. Gray Tags: RESEARCH PAPER Source Type: research

Embryonic and Fetal Development in – Pigmy Rice Rat – Oligoryzomys sp. (Rodentia, Sigmodontinae) and its Significance for Being a new Experimental Model
SummaryOligoryzomys (Cricetidae, Sigmodontinae) is a common rodent genus from South America that includes a couple of very similar species. Related species have been used as experimental model for understanding several diseases for which these species are reservoirs. In order to provide a better understanding of the embryological aspects of this group, herein we showed data on the embryonic and fetal development in Oligoryzomys sp. Eight specimens of different stages of gestation were obtained from the Collection of the Zoology Museum of University of Sao Paulo, Brazil. Gestational ages were estimated by crown‐rump‐len...
Source: Anatomia, Histologia, Embryologia: Journal of Veterinary Medicine Series C - February 1, 2012 Category: Veterinary Research Authors: P. O. FavaronM. N. RodriguesM. F. OliveiraC. M. BiasiM. A. Miglino Tags: Original Article Source Type: research

Identification of immunogenic proteins of Flavobacterium columnare by two‐dimensional electrophoresis immunoblotting with antibacterial sera from grass carp, Ctenopharyngodon idella (Valenciennes)
In this study, 14 proteins were identified from cellular components of F. columnare using an immunoblotting approach in two‐dimensional electrophoresis map gels with antibacterial sera from grass carp, Ctenopharyngodon idella (Valenciennes), and then anti‐grass carp‐recombinant Ig (rIg) polyclonal antibodies. These proteins were characterized conclusively by matrix‐assisted laser desorption/ionization‐time of flight‐mass spectrometry (MALDI‐TOF/TOF MS). The 14 proteins are immunogenic molecules of F. columnare, including chaperonins DnaK, GroEL and trigger factor, and translation elongation factor G, transl...
Source: Journal of Fish Diseases - January 31, 2012 Category: Zoology Authors: Z X LiuG Y LiuN LiF S XiaoH X XieP Nie Source Type: research

Seismic Signaling is Crucial for Female Mate Choice in a Multimodal Signaling Wolf Spider
AbstractComplex courtship signals can be dissected into distinct components that can either function independently or via interactions with one another. Male Rabidosa rabida wolf spiders use courtship displays that couple a seismic signal with the waving of an ornamented foreleg. While previous studies suggest that female R. rabida exhibit mate choice and that both the seismic and visual modalities are important in mating interactions, it remains unclear how variation in each component influences female mating decisions. To investigate this, we ran two separate experiments in which we manipulated (1) male diets, to induce...
Source: Ethology - January 31, 2012 Category: Zoology Authors: Dustin J. WilgersEileen A. Hebets Tags: RESEARCH PAPER Source Type: research

Relationships between yolk androgens and nest density, laying date, and laying order in Western Burrowing Owls (Athene cunicularia hypugaea)
Canadian Journal of Zoology, Volume 0, Issue 0, Page 182-192, e-First articles.
Source: Canadian Journal of Zoology - January 31, 2012 Category: Zoology Tags: article Source Type: research

A new inhibitory pathway in the jellyfish Polyorchis penicillatus
Canadian Journal of Zoology, Volume 0, Issue 0, Page 172-181, e-First articles.
Source: Canadian Journal of Zoology - January 31, 2012 Category: Zoology Tags: article Source Type: research

Dates of publication of issues / Dates de parution des numéros
Canadian Journal of Zoology, Volume 0, Issue 0, Page iii, e-First articles.
Source: Canadian Journal of Zoology - January 31, 2012 Category: Zoology Tags: article Source Type: research

Common nucleotide sequence of structural gene encoding fibroblast growth factor 4 in eight cattle derived from three breeds
ABSTRACTFibroblast growth factor 4 (FGF4) is considered as a crucial gene for the proper development of bovine embryos. However, the complete nucleotide sequences of the structural genes encoding FGF4 in identified breeds are still unknown. In the present study, direct sequencing of PCR products derived from genomic DNA samples obtained from three Japanese Black, two Japanese Shorthorn and three Holstein cattle, revealed that the nucleotide sequences of the structural gene encoding FGF4 matched completely among these eight cattle. On the other hand, differences in the nucleotide sequences, leading to substitutions, inserti...
Source: Animal Science Journal - January 30, 2012 Category: Zoology Authors: Sho SATO, Toshikiyo TAKAHASHI, Hiroshi NISHINOMIYA, Makiko KATOH, Ryu ITOH, Masaki YOKOO, Mari YOKOO, Momoe IHA, Yuki MORI, Kano KASUGA, Ikuo KOJIMA, Masayuki KOBAYASHI Source Type: research

Effect of replacing corn with brown rice grain in a total mixed ration silage on milk production, ruminal fermentation and nitrogen balance in lactating dairy cows
ABSTRACTNine multiparous Holstein cows were used in a replicated 3 × 3 Latin square design to determine the effects of substituting corn grain with brown rice (BR) grain in total mixed ration (TMR) silage on milk yield, ruminal fermentation and nitrogen (N) balance. The TMR silages were made from the ensiling of TMR containing (dry matter basis) 50.1% forage in rice silage and corn silage combination, and 49.9% concentrate. The grain portion of the diets contained 31.2% steam‐flaked corn, 31.2% steam‐flaked BR or an equal mixture of corn and BR. Dietary treatments did not affect dry matter intake, milk yield and m...
Source: Animal Science Journal - January 30, 2012 Category: Zoology Authors: Makoto MIYAJI, Hiroki MATSUYAMA, Kenji HOSODA, Kazuhisa NONAKA Source Type: research

Effects of photoperiod on the secretion of growth hormone in female goats
ABSTRACTThe aim of the present study was to clarify the effect of photoperiod on the secretion of growth hormone (GH) in goats. Adult female goats were kept at 20°C with an 8‐h or 16‐h photoperiod, and secretory patterns of GH for 4 h (12.00 to 16.00 hours) were compared. In addition, the goats were kept under a 16‐h photoperiod and orally administered saline (controls) or melatonin, and the effects of melatonin on the secretion of GH were examined. GH was secreted in a pulsatile manner. There were no significant differences in pulse frequency between the 8‐ and 16‐h photoperiods; however, GH pulse amplitude t...
Source: Animal Science Journal - January 30, 2012 Category: Zoology Authors: Jin JIN, Tomoyoshi YAEGASHI, Ken SAWAI, Tsutomu HASHIZUME Source Type: research

Feeding Aspergillus awamori reduces skeletal muscle protein breakdown and stimulates growth in broilers
In conclusion, feeding A. awamori improves growth performance because skeletal muscle proteolytic activity is reduced and digestibilities of energy and protein are increased.
Source: Animal Science Journal - January 30, 2012 Category: Zoology Authors: Ahmed A. SALEH, Yahya Z. EID, Tarek A. EBEID, Akira OHTSUKA, Masahiro YAMAMOTO, Kunioki HAYASHI Source Type: research

Sulfated cholecystokinin‐8 increases ghrelin secretion but does not affect oxyntomodulin in Holstein steers
In conclusion, our results show that administration of CCK increased ghrelin secretion but did not affect OXM release in ruminants. Ghrelin did not affect the secretions of CCK and OXM.
Source: Animal Science Journal - January 30, 2012 Category: Zoology Authors: Swe YANNAING, Hnin THIDARMYINT, Hongqiong ZHAO, Sint THANTHAN, Kouki KITAGAWA, Hideto KUWAYAMA Source Type: research

Polymorphism of spermatozoa in Largus rufipennis Laporte 1832 (Heteroptera: Pyrrhocoroidea: Largidae)
AbstractThe production of polymorphic spermatozoa has been registered in various insect orders such as Diptera, Lepidoptera, and Hemiptera. In this work, morphology of two types of spermatozoa produced by Largus rufipennis was reported for the first time in the Largidae family. For this, techniques including optical and transmission electron microscopy were used. Spermatozoa measured, on the average, 260 and 200 μm, and both types possessed a nucleus measuring on the average 65 μm. No ultrastructural differences were observed between the two spermatozoa types from L. rufipennis. The head region is composed of an acros...
Source: Acta Zoologica - January 30, 2012 Category: Zoology Authors: Vinícius Albano Araújo, Sônia Nair Báo, José Lino‐Neto Tags: Original Article Source Type: research

Relationship Between Condition, Aggression, Signaling, Courtship, and Egg Laying in the Field Cricket, Gryllus assimilis
AbstractSexual selection theory suggests males in good condition should be more successful than males in poor condition when competing with rivals for territories and mates. Understanding how condition influences the interplay between aggression, mate attraction, and courtship displays could help explain why variation is maintained in traits that confer fitness. Using laboratory‐reared Jamaican field crickets, Gryllus assimilis, we found that fine‐scale temporal components of mate attraction signals were positively correlated with body condition (residual body mass) and body size; signaling effort was positively correl...
Source: Ethology - January 30, 2012 Category: Zoology Authors: Susan M. BertramVanessa Rook Tags: RESEARCH PAPER Source Type: research

Effect of replacing corn with brown rice grain in a total mixed ration silage on milk production, ruminal fermentation and nitrogen balance in lactating dairy cows
ABSTRACTNine multiparous Holstein cows were used in a replicated 3 × 3 Latin square design to determine the effects of substituting corn grain with brown rice (BR) grain in total mixed ration (TMR) silage on milk yield, ruminal fermentation and nitrogen (N) balance. The TMR silages were made from the ensiling of TMR containing (dry matter basis) 50.1% forage in rice silage and corn silage combination, and 49.9% concentrate. The grain portion of the diets contained 31.2% steam‐flaked corn, 31.2% steam‐flaked BR or an equal mixture of corn and BR. Dietary treatments did not affect dry matter intake, milk yield and m...
Source: Animal Science Journal - January 30, 2012 Category: Zoology Authors: Makoto MIYAJIHiroki MATSUYAMAKenji HOSODAKazuhisa NONAKA Source Type: research

Effects of photoperiod on the secretion of growth hormone in female goats
ABSTRACTThe aim of the present study was to clarify the effect of photoperiod on the secretion of growth hormone (GH) in goats. Adult female goats were kept at 20°C with an 8‐h or 16‐h photoperiod, and secretory patterns of GH for 4 h (12.00 to 16.00 hours) were compared. In addition, the goats were kept under a 16‐h photoperiod and orally administered saline (controls) or melatonin, and the effects of melatonin on the secretion of GH were examined. GH was secreted in a pulsatile manner. There were no significant differences in pulse frequency between the 8‐ and 16‐h photoperiods; however, GH pulse amplitude t...
Source: Animal Science Journal - January 30, 2012 Category: Zoology Authors: Jin JINTomoyoshi YAEGASHIKen SAWAITsutomu HASHIZUME Source Type: research