1,368 results match your criteria Canadian Journal Of Zoology[Journal]


Eggshell porosity covaries with egg size among female House Wrens () but is unrelated to incubation onset and egg-laying order within clutches.

Can J Zool 2015 Jun;93(6):421-425

Department of Biology, Illinois Wesleyan University, Bloomington, IL, USA.

In birds, the duration of egg incubation (the time from incubation onset to hatching) can affect multiple components of nest success, but what affects incubation duration? Previous studies suggest that incubation duration is affected by both parental behavior and components of the egg, which have yet to be determined. One egg component that may be related to incubation behavior and the time until hatching is eggshell porosity, which affects the exchange of metabolic gasses and water vapor across the shell and, thus, the speed of embryonic development and incubation duration. We tested whether eggshell porosity was associated with the timing of incubation onset by female House Wrens ( Vieillot, 1809), and whether porosity varied within clutches in a manner that might be associated with incubation periods and hatching patterns (i. Read More

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http://dx.doi.org/10.1139/cjz-2014-0279DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4486336PMC

Molluscan cells in culture: primary cell cultures and cell lines.

Can J Zool 2013 Jun;91(6)

Department of Pathobiological Sciences, University of Wisconsin, School of Veterinary Medicine, Madison, WI 53706.

cell culture systems from molluscs have significantly contributed to our basic understanding of complex physiological processes occurring within or between tissue-specific cells, yielding information unattainable using intact animal models. cultures of neuronal cells from gastropods show how simplified cell models can inform our understanding of complex networks in intact organisms. Primary cell cultures from marine and freshwater bivalve and gastropod species are used as biomonitors for environmental contaminants, as models for gene transfer technologies, and for studies of innate immunity and neoplastic disease. Read More

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http://dx.doi.org/10.1139/cjz-2012-0258DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3816639PMC

Molecular systematics of the genus Sigmodon: results from mitochondrial and nuclear gene sequences.

Can J Zool 2009 Mar;87(3):211-220

Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409-3131, USA.

Phylogenetic relationships within the genus Sigmodon Say and Ord, 1825 were examined using sequence data from multiple gene regions, including exon 1 of the nuclear-encoded interphotoreceptor retinoid binding protein, intron 7 of the nuclear beta-fibrinogen gene, and the mitochondrial cytochrome b gene from 27 individuals representing 11 species of Sigmodon. Nuclear genes were analyzed independently, combined with each other, and combined with the mitochondrial data. Topologies were constructed using parsimony and Bayesian methods, with nodal support provided by bootstrap and posterior probability values. Read More

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2855974PMC

Strain-specific alteration of zebrafish feeding behavior in response to aversive stimuli.

Can J Zool 2008 Oct;86(10):1085-1094

University of Idaho, Department of Biological Sciences, P.O. Box 443051, Moscow, ID 83844-3051, USA.

Behavioral management of risk, in which organisms must balance the requirements of obtaining food resources with the risk of predation, has been of considerable interest to ethologists for many years. Although numerous experiments have shown that animals alter their foraging behavior depending on the levels of perceived risk and demand for nutrients, few have considered the role of genetic variation in the trade-off between these variables. We performed a study of four zebrafish (Danio rerio (Hamilton, 1822)) strains to test for genetic variation in foraging behavior and whether this variation affected their response to both aversive stimuli and nutrient restriction. Read More

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http://dx.doi.org/10.1139/Z08-085DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3048467PMC
October 2008

Lung use and development in Xenopus laevis tadpoles.

Can J Zool 1994 ;72:738-43

Department of Anatomy and Neurobiology, Dalhousie University, Halifax, Canada.

Shortly after hatching, Xenopus laevis tadpoles fill their lungs with air. We examined the role played by early lung use in these organisms, since they are able to respire with both their lungs and their gills. We investigated the effect on X. Read More

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October 1999
1 Read

Endocrine regulation of carbohydrate metabolism in hypometabolic animals.

Authors:
X J Musacchia

Can J Zool 1988 ;66(1):167-72

Department of Physiology and Biophysics, School of Medicine, University of Louisville, KY 40292.

Experimental hypothermia and natural hibernation are two forms of hypometabolism with recognized physiological changes, including depression of endocrine and metabolic functions. To better understand functional changes, helox (i.e. Read More

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Distribution of retinoids and 3,4-didehydroretinoids in the goldfish.

Can J Zool 1986 Sep;64(9):2066-2067

Division of Life Sciences, The University of Texas at San Antonio, San Antonio, TX, U.S.A. 78285.

Using high-performance liquid chromatography, the quantity of retinol, retinal, and retinyl esters as well as their 3,4-didehydro derivatives were measured in several body compartments and in the remainder of the body of 11 goldfish. Eighty-six percent of these retinoids and 3,4-didehydroretinoids existed as retinyl and 3,4-didehydroretinyl 10% as retinal and 3,4-didehydroretinal, and 4% as retinol and 3,4-didehydroretinol. Most (94%) of these retinoids and 3,4-didehydroretinoids were found in ocular tissues and high ratios of 3,4-didehydroretinoids/retinoids were observed in most tissue extracts. Read More

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http://dx.doi.org/10.1139/z86-313DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4317341PMC
September 1986
13 Reads

The effects of glyphosate herbicide on chicken egg hatchability.

Can J Zool 1980 Oct;58(10):1940-2

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October 1980

Dietary influences on sodium and potassium metabolism of reindeer.

Can J Zool 1980 Oct;58(10):1728-34

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October 1980

Behavioral aspects of cannibalism in larval walleye, Stizostedion vitreum.

Authors:
W R Cuff

Can J Zool 1980 Aug;58(8):1504-7

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Strike tactics of Esox.

Can J Zool 1980 Aug;58(8):1462-9

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Maternal influences on size and emergence time of the cinnabar moth.

Can J Zool 1980 Aug;58(8):1452-7

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The morphology of cysts of Sarcocystis infecting birds in western Canada.

Can J Zool 1980 Aug;58(8):1477-82

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Effects of sex steroids on plasma lipids in the goldfish, Carassius auratus.

Can J Zool 1980 Jun;58(6):967-72

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A device for observing wild beavers in their lodge.

Can J Zool 1980 Jun;58(6):1210-2

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Food habits of two Vancouver Island wolf packs: a preliminary study.

Can J Zool 1980 Jun;58(6):1203-7

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Mechanisms of fine particle capture by larval black flies (Diptera: Simuliidae).

Authors:
D H Ross D A Craig

Can J Zool 1980 Jun;58(6):1186-92

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Movement patterns and foraging ecology of a stream caddisfly larva.

Authors:
D D Hart V H Resh

Can J Zool 1980 Jun;58(6):1174-85

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[Ontogeny of behavior in red squirrels (Tamiasciurus hudsonicus)].

Authors:
J Ferron

Can J Zool 1980 Jun;58(6):1090-9

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