Browsing by Subject "Major zoology"
Now showing items 1-20 of 31
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(Texas A&M University. Libraries, 1986)Karyotypic data from a total of 574 deer mice from insular populations off British Columbia and Washington indicate the presence of two distinct karyotypic groups, a "low FN" group (FN = 74-78) and a "high FN" group (FN = ...
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(Texas A&M University. Libraries, 1987)Karyotypic data are presented for a total of 723 individuals of Peromyscus boylii from Latin America. The range of karyotypic variation now documented in P. boylii (FN = 47-68) is greater than that known for any other ...
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(Texas A&M University. Libraries, 1970)Controlled experiments were conducted to attempt to measure the effects of varied population density and degree of parasitic infection on A. glabratus. The original progenitors of the snails and parasites used were obtained ...
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(Texas A&M University. Libraries, 1974)Chick embryos, after two days of incubation, were exposed continuously to 1000 R of Co-60 gamma irradiation at dose rates of 0.7 R/min and 80.0 R/min and to 1500 R at 1.0 R/min and 80.0 R/min. At a dose of 1000 R, the ...
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(Texas A&M University. Libraries, 1988)The patterns of chromosomal pairing and chiasma distribution were analyzed in deer mice (Peromyscus sitkensis, P. maniculatus, and offspring of the crosses P. m. borealis X P. m. bairdii and P. maniculatus x P. polionotus) ...
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(Texas A&M University. Libraries, 1971)Twenty-five sexually mature albino rates were divided into equal size groups. Each group received one of the following treatments: no irradiation, 1,000 rad, 2,000 rad, 5,000 rad, or 10,000 rad. The whole-body gamma radiation ...
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(Texas A&M University. Libraries, 1994)The avian circadian system is composed of several oscillatory and photoreceptive components whose mutual interactions regulate the temporal pattern of a wide variety of biochemical, physiological, and behavioral events. ...
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(Texas A&M University. Libraries, 1967)
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(Texas A&M University. Libraries, 1970)One hundred twenty male Wistar rats were divided into three groups of 40 each. One was fed on low potassium-high sodium, another on low sodium-high potassium, and the third a control diet. Half of each group was irradiated ...
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(Texas A&M University. Libraries, 1979)Larvae of the estuarine caridean shrimp Palaemonetes pugio (Holthuis) were reared from hatch through completion o f metamorphosis in 80 combinations o f salinity (3 to 31 o/oo ), temperature (20 to 35°C), and zinc (0.00 ...
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(Texas A&M University. Libraries, 1979)The behavioral responses of channel catfish (Ictalurus punctatus) and black (I. melas), brown (I. nebulosus) and yellow bullhead (I. natalis) to pheromones were monitored. Channel catfish were significantly attracted to ...
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(Texas A&M University. Libraries, 1965)
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(Texas A&M University. Libraries, 1971)Pregnant albino mice were continuously gamma-irradiated with daily doses of 50R and 100R from day 6 to day 16 of gestation. At day 20 of gestation the effects of continuous irradiation on the litter size, resorption rate, ...
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(Texas A&M University. Libraries, 1978)Some signs of acute ethanol intoxication might result from an action of acetaldehyde, the first metabolite of ethanol degradation in the liver. Support for this concept is derived largely from findings that acetaldehyde ...
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(Texas A&M University. Libraries, 1971)One hundred and forty-four recently bred female albino mice in groups of 24 each were exposed to gamma-irradiation continuously for the first 20 days of gestation at the rate of 22, 27, 30, 44, and 52 R/day respectively ...
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(Texas A&M University. Libraries, 1985)Chironomid larvae were collected from streams in the Big Thicket area of East Texas from November, 1981 to October, 1982. Primary stations were sampled monthly and secondary stations were sampled bi-annually. Samples of ...
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(Texas A&M University. Libraries, 1970)An investigation was made on the effects of Toxocara canis in "abnormal" hosts. Hosts used in this study were white mice, Mus musculus Linnaeus; Mexican ground squirrels, Citellus mexlcanus Erxleben; golden hamsters, ...
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Molecular evolution of sea turtles with special reference to the leatherback, Dermochelys coriacea (Texas A&M University. Libraries, 1995)Nucleotide sequences from the ND4-tRNALeu (907 bp) and control (526 bp) regions of mitochondrial (mt) DNA were used to resolve areas of uncertainty in marine turtle (Chelonioidae) systematics. Parsimony analysis based ...
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(Texas A&M University. Libraries, 1994)The avian circadian system is regulated by four circadian components: the pineal gland, the suprachiasmatic nuclei (SCN) of the hypothalamus, the retinae and deep brain extraocular photoreceptors (EOP). The interactions ...