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This page shows you the most recent publications within this specialty of the MedWorm directory. This is page number 14.

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Morph-dependent expression and subcellular localization of host serine carboxypeptidase in bacteriocytes of the pea aphid associated with degradation of the endosymbiotic bacterium buchnera.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Pea aphids form a mutualistic association with the endosymbiotic bacterium Buchnera, which is harbored in specialized host cells called bacteriocytes. The adult aphids display dimorphism In which there are winged and wingless morphs. We previously reported that the Buchnera density in bacteriocytes of the winged morph (alate) decreases around final ecdysis, whereas that in the wingless morph (aptera) does not decrease; the decrease in density in alatae is accompanied by activation of the host lysosomal system and by Buchnera degradation. In the present study, we performed a proteomic analysis to clarify the molecular m...
Source: Zoological Science - May 31, 2009 Category: Zoology Authors: Nishikori K, Kubo T, Morioka M Tags: Zoolog Sci Source Type: journals

A Homolog of the Vertebrate Thyrostimulin Glycoprotein Hormone alpha Subunit (GPA2) is Expressed in Amphioxus Neurons.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The cystine-knot glycoprotein hormone alpha (GPA) family regulates gonadal and thyroid functions in vertebrates. Little is known concerning GPA family members in primitive chordates. A previous genomic analysis revealed the presence of two genes homologous to the thyrostimulin alpha subunit (GPA2) in an amphioxus (Branchiostoma floridae); however only one GPA2 homolog contained both the cystine-knot structure and N-glycosylation site characteristic of family members. Gene-specific PCR was used to obtain the cDNA and genomic sequences of the GPA2 homolog of the amphioxus Branchiostoma belcheri. Whole-mount in situ hybri...
Source: Zoological Science - May 31, 2009 Category: Zoology Authors: Tando Y, Kubokawa K Tags: Zoolog Sci Source Type: journals

Discovery of dense aggregations of stalked crinoids in izu-ogasawara trench, Japan.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Stalked crinoids are recognized as living fossils that typically inhabit modern deep-water environments exceeding 100 m. Previous records of stalked crinoids from hadal depths (exceeding 6000 m) are extremely rare, and no in-situ information has been available. We show here that stalked crinoids live densely on rocky substrates at depths over 9000 m in the Izu-Ogasawara Trench off the eastern coast of Japan, evidenced by underwater photos and videos taken by a remotely operated vehicle. This is the deepest in-situ observation of stalked crinods and demonstrates that crinoid meadows can exist at hadal depths close to th...
Source: Zoological Science - May 31, 2009 Category: Zoology Authors: Oji T, Ogawa Y, Hunter AW, Kitazawa K Tags: Zoolog Sci Source Type: journals

Placode formation and generation of gonadotropin-releasing hormone (GnRH) neurons in ascidians.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Neurogenic placodes, a chordate innovation, generate several neuronal populations, including gonadotropin-releasing hormone (GnRH) neurons which are crucial for vertebrate and solitary ascidian urochordate reproduction. The dorsal strand placode of ascidians Is derived from the anterior ridge of the embryonic neural plate and thus shares a common developmental origin and expression of various transcription factors with vertebrate placodes. Despite their importance for understanding vertebrate origins, the evolutionary and developmental origins of the neurogenic placode remain obscure. Here I demonstrate the formation o...
Source: Zoological Science - May 31, 2009 Category: Zoology Authors: Terakado K Tags: Zoolog Sci Source Type: journals

Regulation of Desmin Expression in Adult-Type Myogenesis and Muscle Maturation During Xenopus laevis Metamorphosis.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Isoforms of myosin heavy chain and tropomyosin convert during metamorphosis of Xenopus laevis with larval-to-adult remodeling of dorsal muscle ( Nishikawa and Hayashi, 1994 , Dev. Biol. 165: 86-94). In the present study, other markers for muscle remodeling during metamorphosis were determined by SDS-PAGE analysis. The amounts of twelve muscle proteins changed remarkably during metamorphosis. Among these, a 54-kDa molecule was found to be desmin, and the relative content/total proteins decreased dramatically through metamorphosis. In hindlimb muscle, desmin content increased fourfold during prometamorphosis, when myobla...
Source: Zoological Science - May 31, 2009 Category: Zoology Authors: Kawakami K, Kuroda M, Nishikawa A Tags: Zoolog Sci Source Type: journals

Presoldier Induction by a Juvenile Hormone Analog in the Nasute Termite Nasutitermes takasagoensis (Isoptera: Termitidae).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The ability of JHIII and three JHAs (hydroprene, pyriproxyfen and methoprene) to induce presoldier differentiation was tested in a highly derived termite, Nasutitermes takasagoensis (Isoptera: Nasutitermitinae), and induced presoldiers were examined morphologically and histologically. Hydroprene was the most effective hormone analog for the artificial induction of presoldier differentiation. Principal component analysis showed that hydroprene-induced presoldiers had similar external gross morphology to natural presoldiers found in the same colony. Induced presoldiers had a long, horn-like frontal projection, called a n...
Source: Zoological Science - May 31, 2009 Category: Zoology Authors: Toga K, Hojo M, Miura T, Maekawa K Tags: Zoolog Sci Source Type: journals

Habitat Use in Irrigation Channels by the Golden Venus Chub (Hemigrammocypris rasborella) at Different Growth Stages.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Ecological information on the golden venus chub (Hemigrammocypris rasborella Fowler, 1910) was collected during field surveys and used to analyze habitat use by this species at each growth stage. Surveys were conducted every month for approximately 2 years In an irrigation ditch near the Ushizu River, Kyushu Island, Japan. Based on the characteristic nuptial coloration of males, it was estimated that H. rasborella spawns between spring and summer. Size measurements of 2697 individuals indicated two size classes. The population of age class 1 decreased rapidly after the spawning period. On the basis of growth patterns, ...
Source: Zoological Science - May 31, 2009 Category: Zoology Authors: Onikura N, Nakajima J, Kouno H, Sugimoto Y, Kaneto J Tags: Zoolog Sci Source Type: journals

Comparison of biomarkers of oxidative stress and cardiovascular disease in humans and chimpanzees (Pan troglodytes).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In the oxidative stress hypothesis of aging, the aging process is the result of cumulative damage by reactive oxygen species. Humans and chimpanzees are remarkably similar; but humans live twice as long as chimpanzees and therefore are believed to age at a slower rate. The purpose of this study was to compare biomarkers for cardiovascular disease, oxidative stress, and aging between male chimpanzees and humans. Compared with men, male chimpanzees were at increased risk for cardiovascular disease because of their significantly higher levels of fibrinogen, IGF1, insulin, lipoprotein a, and large high-density lipoproteins...
Source: Comparative Medicine - May 31, 2009 Category: Zoology Authors: Videan EN, Heward CB, Chowdhury K, Plummer J, Su Y, Cutler RG Tags: Comp Med Source Type: journals

Comparison of 3 methods to induce acute pulmonary hypertension in pigs.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Large animal models for acute pulmonary hypertension (PHT) show distinct differences between species and underlying mechanisms. Two embolic procedures and continuous infusion of a stable thromboxane A(2) analogue (U46619) were explored for their ability to induce PHT and their effects on right ventricular function and pulmonary and systemic circulation in 9 pigs. Injection of small (100 to 200 microm) or large (355 to 425 microm) polystyrene beads and incremental dosage (0.2 to 0.8 microg kg(-1) min(-1)) of U46619 all induced PHT. However, infusion of U46619 resulted in stable PHT, whereas that after bead injection dem...
Source: Comparative Medicine - May 31, 2009 Category: Zoology Authors: Roehl AB, Steendijk P, Baumert JH, Schnoor J, Rossaint R, Hein M Tags: Comp Med Source Type: journals

Left ventricular remodeling after myocardial infarction: characterization of a swine model on beta-blocker therapy.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Current guidelines recommend beta blockers for patients after myocardial infarction (MI). Novel therapies for heart failure should be tested in combination with this medication before entering clinical trials. In this methodologic study, we sought to describe the time course of systolic and diastolic parameters of cardiac performance over a 6-wk period in closed-chest model of swine MI treated with a beta blocker. Myocardial infarction in pigs (n = 10) was induced by 90-min balloon occlusion of the left anterior descending coronary artery. Echocardiography and pressure-volume data were collected before and at 1 and 6 w...
Source: Comparative Medicine - May 31, 2009 Category: Zoology Authors: Angeli FS, Shapiro M, Amabile N, Orcino G, Smith CS, Tacy T, Boyle AJ, Chatterjee K, Glantz SA, Grossman W, Yeghiazarians Y Tags: Comp Med Source Type: journals

Assessing anticalcification treatments in bioprosthetic tissue by using the New Zealand rabbit intramuscular model.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The objective of this work was to demonstrate that the New Zealand White (NZW) rabbit intramuscular model can be used for detecting calcification in bioprosthetic tissue and to compare the calcification in the rabbit to that of native human valves. The rabbit model was compared with the commonly used Sprague-Dawley rat subcutaneous model. Eighteen rabbits and 18 rats were used to assess calcification in bioprosthetic tissue over time (7, 14, 30, and 90 d). The explanted rabbit and rat tissue discs were measured for calcium by using atomic absorption and Raman spectroscopy. Calcium deposits on the human valve explants were ...
Source: Comparative Medicine - May 31, 2009 Category: Zoology Authors: Wright GA, Faught JM, Olin JM Tags: Comp Med Source Type: journals

The physiologic responses of Dutch belted rabbits infected with inhalational anthrax.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, we explored physiologic parameters in Dutch belted rabbits with inhalation anthrax to characterize the disease progression in this model. To this end, we infected Dutch belted rabbits with 100 LD(50) B. anthracis Ames spores by nasal instillation and continuously recorded various physiologic parameters by using telemetry. In addition, samples were collected at selected times for serum chemistry, hematology, and blood gas analysis. The animals exhibited hemodynamic and respiratory changes that coincided with those reported in human cases of inhalational anthrax infection, including hypotension, altered heart ...
Source: Comparative Medicine - May 31, 2009 Category: Zoology Authors: Lawrence WS, Hardcastle JM, Brining DL, Weaver LE, Ponce C, Whorton EB, Peterson JW Tags: Comp Med Source Type: journals

The unilateral urogenital anomalies (UUA) rat: a new mutant strain associated with unilateral renal agenesis, cryptorchidism, and malformations of reproductive organs restricted to the left side.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We established an inbred rat strain with unilateral urogenital anomalies from an incidentally identified male rat with unilateral renal agenesis and an undescended left testis. These rats were characterized by unilateral renal agenesis in both sexes, undescended testes with agenesis and hypoplasia of the accessory sex organs in male rats, and complete and partial agenesis of the uterine horn in female rats. All of these urogenital anomalies were unilateral and restricted to the left side; we named this phenotype unilateral urogenital anomalies (UUA). Breeding tests showed that these abnormalities were inherited as poly...
Source: Comparative Medicine - May 31, 2009 Category: Zoology Authors: Amakasu K, Suzuki K, Suzuki H Tags: Comp Med Source Type: journals

Use of fat-fed rats to study the metabolic and vascular sequelae of obesity and beta-adrenergic antagonism.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Obesity-associated cardiovascular disease exerts profound human and monetary costs, creating a mounting need for cost-effective and relevant in vivo models of the complex metabolic and vascular interrelationships of obesity. Obesity is associated with endothelial dysfunction and inflammation. Free fatty acids (FFA), generated partly through beta-adrenergic receptor-mediated lipolysis, may impair endothelium-dependent vasodilation (EDV) by proinflammatory mechanisms. beta-Adrenergic antagonists protect against cardiovascular events by mechanisms not fully defined. We hypothesized that beta antagonists may exert benefici...
Source: Comparative Medicine - May 31, 2009 Category: Zoology Authors: Frye M, McMurtry I, Orton EC, Fagan K Tags: Comp Med Source Type: journals

Endpoints for mouse abdominal tumor models: refinement of current criteria.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Accurate, rapid, and noninvasive health assessments are required to establish more appropriate endpoints in mouse cancer models where tumor size is not easily measured. We evaluated potential endpoints in mice with experimentally induced peritoneal lymphoma, an abdominal tumor model, by comparing body weight, body condition, and behavior with those of a control group of mice not developing lymphoma. Our hypothesis was that body weight would increase or plateau, whereas body condition and behavioral scores would decrease, as disease progressed. Results indicated that body weight did not differ significantly between the ...
Source: Comparative Medicine - May 31, 2009 Category: Zoology Authors: Paster EV, Villines KA, Hickman DL Tags: Comp Med Source Type: journals

Moxidectin toxicity in senescence-accelerated prone and resistant mice.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This report shows that topically applied moxidectin at a standard dose accumulates in the CNS causing toxicosis in both SAMP8 and SAMR1 mice. PMID: 19619412 [PubMed - in process]
Source: Comparative Medicine - May 31, 2009 Category: Zoology Authors: Lee VK, Tiwary AK, Sharma-Reddy P, Lieber KA, Taylor DK, Mook DM Tags: Comp Med Source Type: journals

Deletion of mitogen-activated protein kinase phosphatase 1 modifies the response to mechanical bone marrow ablation in a mouse model.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The maintenance of bone mass results from a delicate balance between bone formation by osteoblasts and bone resorption by osteoclasts. Understanding these processes is essential for the development of effective treatments for skeletal diseases. Mechanical bone marrow ablation provides a unique animal model to study bone repair and the roles of specific genes in this process. Ablation of marrow induces the formation of intramembranous bone in the medullary cavity, which is subsequently resorbed by osteoclasts. We used this model to ask whether mitogen-activated protein kinase (MAPK) phosphatase 1 (MKP1) affects the bone...
Source: Comparative Medicine - May 31, 2009 Category: Zoology Authors: Carlson J, Zhang Q, Bennett A, Vignery A Tags: Comp Med Source Type: journals

Alopecia: possible causes and treatments, particularly in captive nonhuman primates.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
PMID: 19619410 [PubMed - in process]
Source: Comparative Medicine - May 31, 2009 Category: Zoology Authors: Chu D Tags: Comp Med Source Type: journals

Competing interests policy for AALAS journals.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
PMID: 19619409 [PubMed - in process]
Source: Comparative Medicine - May 31, 2009 Category: Zoology Authors: Hankenson FC, Silverman J, Dysko BC, Thomas SA, Benner D Tags: Comp Med Source Type: journals

Competing interests policy for AALAS journals.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
PMID: 19619408 [PubMed - in process]
Source: Comparative Medicine - May 31, 2009 Category: Zoology Authors: Toth LA, Compton SR, Tolwani R Tags: Comp Med Source Type: journals

Female territoriality in a paternal mouthbrooding cardinalfish to avoid predation against spawned eggsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Kayoko Fukumori, Noboru Okuda, and Yasunobu Yanagisawa - Generally, paternal mouthbrooding cardinalfishes are characteristic of sex-role-reversed animals: females have a higher potential reproductive rate and are more active in mating competition than males,...
Source: Canadian Journal of Zoology - May 31, 2009 Category: Zoology Source Type: journals

Forest chimpanzees (Pan troglodytes verus) remember the location of numerous fruit trees.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
It is assumed that spatial memory contributes crucially to animal cognition since animals' habitats entail a large number of dispersed and unpredictable food sources. Spatial memory has been investigated under controlled conditions, with different species showing and different conditions leading to varying performance levels. However, the number of food sources investigated is very low compared to what exists under natural conditions, where food resources are so abundant that it is difficult to precisely identify what is available. By using a detailed botanical map containing over 12,499 trees known to be used by the T...
Source: Animal Cognition - May 31, 2009 Category: Zoology Authors: Normand E, Ban SD, Boesch C Tags: Anim Cogn Source Type: journals

Tbx1 and Brn4 regulate retinoic acid metabolic genes during cochlear morphogenesisEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Conclusion: These results indicate that Tbx1 expression in the POM regulates cochlear outgrowth potentially via control of local retinoic acid activity.
Source: BMC Developmental Biology - Latest articles - May 29, 2009 Category: Zoology Authors: Evan BraunsteinDennis MonksVimla AggarwalJelena ArnoldBernice Morrow Source Type: journals

Biogeographical and evolutionary importance of the European high mountain systemsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Europe is characterised by several high mountain systems dominating major parts of its area, and these structures have strongly influenced the evolution of taxa. For species now restricted to these high mountain systems, characteristic biogeographical patterns of differentiation exist. (i) Many local endemics are found in most of the European high mountain systems especially in the Alps and the more geographically peripheral regions of Europe. Populations isolated in these peripheral mountain ranges often have strongly differentiated endemic genetic lineages, which survived and evolved in the vicinity of these mountain are...
Source: Frontiers in Zoology - May 29, 2009 Category: Zoology Authors: Thomas Schmitt Source Type: journals

Decision making and visibility in cats (Felis catus) in a progressive elimination task.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
When making decisions animals can rely on information stored in memory and/or on information available through perceptual processes. Under some circumstances, perceptual access to a relevant piece of information can be lost as when a prey hides under a cover. If this piece of information is critical, the animal must be able to keep it active in the working memory until the final decision is made. Species endowed with object permanence can to a certain extent overcome such a lack of perceptual access. Numerous studies have investigated object permanence in animals, but no study systematically examined the interaction wh...
Source: Animal Cognition - May 29, 2009 Category: Zoology Authors: Dorais Pagé D, Dumas C Tags: Anim Cogn Source Type: journals

Vocal behaviour of the squirrel glider (Petaurus norfolcensis)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
David J. Sharpe, Ross L. Goldingay - Volume 57(1)
Source: Australian Journal of Zoology - May 28, 2009 Category: Zoology Source Type: journals

Use of genetic methods to establish male-biased dispersal in a cryptic mammal, the swamp wallaby (Wallabia bicolor)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Justyna Zofia Paplinska, Mark D. B. Eldridge, Desmond W. Cooper, Peter D. M. Temple-Smith, Marilyn B. Renfree - Volume 57(1)
Source: Australian Journal of Zoology - May 28, 2009 Category: Zoology Source Type: journals

Neutralizing antibody levels for protection against betanodavirus infection in sevenband grouper, Epinephelus septemfasciatus (Thunberg), immunized with an inactivated virus vaccineEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
An inactivated betanodavirus, red-spotted grouper nervous necrosis virus (RGNNV), is a vaccine candidate for viral nervous necrosis (VNN). The present study was conducted to examine inoculation doses of the vaccine and neutralizing antibody titre levels to protect fish against VNN. Young sevenband grouper, Epinephelus septemfasciatus, averaging 25.4 g, were immunized at 25 °C water temperature by a single intraperitoneal injection of formalin-inactivated RGNNV. Fish immunized at vaccine doses of 108.5, 108.0, 107.5, 107.0 and 106.5 TCID50 per fish produced antibodies at mean titres of 1:907, 1:511, 1:259, 1:197 and 1:96, ...
Source: Journal of Fish Diseases - May 27, 2009 Category: Zoology Authors: H Yamashita, K Mori, A Kuroda, T Nakai Source Type: journals

Soybean meal alters autochthonous microbial populations, microvilli morphology and compromises intestinal enterocyte integrity of rainbow trout, Oncorhynchus mykiss (Walbaum)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Rainbow trout were fed either a diet containing fishmeal (FM) as the crude protein source or a diet containing 50% replacement with soybean meal (SBM) for 16 weeks. An enteritis-like effect was observed in the SBM group; villi, enterocytes and microvilli were noticeably damaged compared with the FM group. The posterior intestine microvilli of SBM-fed fish were significantly shorter and the anterior intestine microvilli significantly less dense than the FM-fed fish. Electron microscopy confirmed the presence of autochthonous bacterial populations associated with microvilli of both fish groups. Reduced density of microvilli ...
Source: Journal of Fish Diseases - May 27, 2009 Category: Zoology Authors: D L Merrifield, A Dimitroglou, G Bradley, R T M Baker, S J Davies Source Type: journals

Eustrongylides ignotus infecting commercial bass, Morone chrysops female X Morone saxatilis male, and other fish in the southeastern USAEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Source: Journal of Fish Diseases - May 27, 2009 Category: Zoology Authors: A J Mitchell, R M Overstreet, A E Goodwin Source Type: journals

Expression and characterization of the periplasmic cobalamin-binding protein of Photobacterium damselae subsp. piscicidaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Cobalamin (vitamin B12) is an essential cofactor in a variety of enzymatic reactions and most prokaryotes contain transport systems to import vitamin B12. A gene coding for a periplasmic cobalamin-binding protein of Photobacterium damselae subsp. piscicida was identified by in silico analysis of sequences from a genomic library. The open reading frame was composed of 834 bp encoding a protein of 277 amino acids. The protein showed 61% identity with the vitamin B12-binding protein precursor of P. profundum, 53% identity with the corresponding protein of Vibrio parahaemolyticus and 43% identity with the periplasmic binding p...
Source: Journal of Fish Diseases - May 27, 2009 Category: Zoology Authors: R Boiani, F Andreoni, G Serafini, I Bianconi, R Pierleoni, S Dominici, F Gorini, M Magnani Source Type: journals

Molecular detection of three shrimp viruses and genetic variation of white spot syndrome virus in Hainan Province, China, in 2007Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
White spot syndrome virus (WSSV), Taura syndrome virus (TSV) and infectious hypodermal and haematopoietic necrosis virus (IHHNV) have been responsible for major pandemics affecting the shrimp farming industry. Shrimp samples were collected from eight farms in Hainan Province, China, during 2007 and analysed by polymerase chain reaction (PCR) or reverse transcriptase PCR methods to determine the prevalence of these viruses. From the eight sampling locations, only samples from one farm did not show any indication of infection with WSSV, TSV or IHHNV, while samples from one additional farm exhibited evidence of infection with...
Source: Journal of Fish Diseases - May 27, 2009 Category: Zoology Authors: Y Tan, Y Xing, H Zhang, Y Feng, Y Zhou, Z-L Shi Source Type: journals

Lipopolysaccharide extraction: a phenol alternativeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Source: Journal of Fish Diseases - May 27, 2009 Category: Zoology Authors: R M L Gratacap, K D Thompson, I R Bricknell, A Adams Source Type: journals

Temporal and Spatial Distribution of Male Scent Marks in the Polygynous Greater Sac-Winged BatEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Scent marks are relatively long-lived signals that can be perceived by conspecifics when the producer is absent. Therefore, it is often not obvious to whom the signal is directed. In daytime roosts of the polygynous greater sac-winged bat, males scent mark territories with facial gland secretions. Territories are a valuable resource for males, as they offer exclusive courtship opportunities, which results in increased male reproductive success and, consequently, increased male[ndash]male competition over territories. The information encoded in male scent marks could, therefore, be either directed at females as part of an o...
Source: Ethology - May 27, 2009 Category: Zoology Authors: Barbara A. Caspers, Christian C. Voigt Source Type: journals

Phylogeography of the longnose dace (Rhinichthys cataractae) species group in northwestern North America the origin and evolution of the Umpqua and Millicoma daceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
J. D. McPhail and E. B. Taylor - The Umpqua and Millicoma dace are small cyprinid fishes endemic, respectively, to the Umpqua and Coos rivers on the central coast of Oregon. The origins...
Source: Canadian Journal of Zoology - May 27, 2009 Category: Zoology Source Type: journals

Asymmetrical male-mediated gene flow between harbor seal (Phoca vitulina) populations in AlaskaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
J. K. Herreman, G. M. Blundell, D. B. McDonald, and M. Ben-David - Harbor seals (Phoca vitulina richardii (Gray, 1864)) in Alaska are currently treated as three distinct management stocks. Previous genetic analyses using mitochondrial DNA suggested that...
Source: Canadian Journal of Zoology - May 27, 2009 Category: Zoology Source Type: journals

The spermatozoon of the Old Endemic Australo-Papuan and Philippine rodents – its morphological diversity and evolutionEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Breed, W.G. and Leigh, C.M. 2009. The spermatozoon of the Old Endemic Australo-Papuan and Philippine rodents [ndash] its morphological diversity and evolution.[mdash]Acta Zoologica (Stockholm) xx: 00[ndash]00 The spermatozoon of most murine rodents contains a head in which there is a characteristic apical hook, whereas most old endemic Australian murines, which are part of a broader group of species that also occur in New Guinea and the Philippines, have a far more complex sperm form with two additional ventral processes. Here we ask the question: what is the sperm morphology of the New Guinea and Philippines species and w...
Source: Acta Zoologica - May 27, 2009 Category: Zoology Authors: William G. Breed, Christopher M. Leigh Source Type: journals

Comparing dogs and great apes in their ability to visually track object transpositions.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Knowing that objects continue to exist after disappearing from sight and tracking invisible object displacements are two basic elements of spatial cognition. The current study compares dogs and apes in an invisible transposition task. Food was hidden under one of two cups in full view of the subject. After that both cups were displaced, systematically varying two main factors, whether cups were crossed during displacement and whether the cups were substituted by the other cup or instead cups were moved to new locations. While the apes were successful in all conditions, the dogs had a strong preference to approach the l...
Source: Animal Cognition - May 27, 2009 Category: Zoology Authors: Rooijakkers EF, Kaminski J, Call J Tags: Anim Cogn Source Type: journals

Ultrasonographic assessment of early pregnancy diagnosis, fetometry and sex determination in goats.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, B-mode real-time ultrasonography is recommended as a reliable mean for early detection of gestation as early as 19-27 days after mating, for CRL or BPD measuring as well as fetal sex determination from day 40 of gestation onwards under field conditions. PMID: 19535206 [PubMed - as supplied by publisher]
Source: Animal Reproduction Science - May 26, 2009 Category: Zoology Authors: Amer HA Tags: Anim Reprod Sci Source Type: journals

A Mechanistic Model to Study the Thermal Ecology of a Southeastern Pacific Dominant Intertidal Mussel and Implications for Climate ChangeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Physiological and Biochemical Zoology, Volume 82, Issue 4, Page 303-313, July/August 2009. Abstract Developing mechanistic models to predict an organism’s body temperature facilitates the study of physiological stresses caused by extreme climatic conditions the species might have faced in the past or making predictions about changes to come in the near future. Because the models combine empirical observation of different climatic variables with essential morphological attributes of the species, it is possible to examine specific aspects of predicted climatic changes. Here, we develop a model for the competitively d...
Source: Physiological and Biochemical Zoology - May 26, 2009 Category: Zoology Tags: article Articles Source Type: journals

Ontogeny and Individual Variation in the Adrenocortical Response of Zebra Finch (Taeniopygia guttata) NestlingsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Physiological and Biochemical Zoology, Volume 82, Issue 4, Page 325-331, July/August 2009. Abstract Numerous studies indicate interspecies variation in the ontogeny of the adrenocortical response in birds; however, little is known about the extent of interindividual variation in avian young. Toward this end, we examined the ontogeny and interindividual variation in the adrenocortical response in zebra finch (Taeniopygia guttata) nestlings. We measured baseline and stress‐induced total (bound and free) corticosterone, corticosteroid binding globulin capacity, and resulting estimated free corticosterone levels in nes...
Source: Physiological and Biochemical Zoology - May 26, 2009 Category: Zoology Tags: article Articles Source Type: journals

Study by transmission and scanning electron microscopy of the morphogenesis of three types of lingual papillae in the albino rat (Rattus rattus)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, the rudiments of the fungiform and circumvallate papillae were visible earlier than those of the filiform papillae. The morphogenesis of filiform papillae advanced in a parallel manner with the keratinization of the lingual epithelium, in the period from just before birth to a few weeks after birth.
Source: Acta Zoologica - May 26, 2009 Category: Zoology Authors: Ahlam Mostafa El-Bakry Source Type: journals

The hatching larva of the priapulid worm Halicryptus spinulosusEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Despite their increasing evolutionary importance, basic knowledge about the priapulid worms remains limited. In particular, priapulid development has only been partially documented. Following previous description of hatching and the earliest larval stages of Priapulus caudatus, we here describe the hatching larva of Halicryptus spinulosus. Comparison of the P. caudatus and the H. spinulosus hatching larvae allows us to attempt to reconstruct the ground pattern of priapulid development. These findings may further help unravelling the phylogenetic position of the Priapulida within the Scalidophora and hence contribute to the...
Source: Frontiers in Zoology - May 26, 2009 Category: Zoology Authors: Ralf JanssenSofia WennbergGraham Budd Source Type: journals

Body size, food habits, reproduction and growth in a population of black whip snakes (Demansia vestigiata) (Serpentes : Elapidae) in tropical AustraliaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
S. Fearn, D. F. Trembath - Volume 57(1)
Source: Australian Journal of Zoology - May 25, 2009 Category: Zoology Source Type: journals

Divergent lineages in the heath mouse (Pseudomys shortridgei) are indicative of major contraction to geographically isolated refugia on the eastern and western sides of Australia during the early PleistoceneEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Maria Salinas, Michael Bunce, Damien Cancilla, Deryn L. Alpers, Peter B. S. Spencer - Volume 57(1)
Source: Australian Journal of Zoology - May 25, 2009 Category: Zoology Source Type: journals

Limited behavioural thermoregulation by adult upriver-migrating sockeye salmon (Oncorhynchus nerka) in the Lower Fraser River, British ColumbiaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The objective of this study was to combine radio telemetry with individual thermal loggers to assess the extent to which adult migrating sockeye salmon (Oncorhynchus...
Source: Canadian Journal of Zoology - May 24, 2009 Category: Zoology Source Type: journals

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