Browsing by Subject "Reproduction"
Now showing items 41-60 of 83
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A hierarchical approach to modeling the salmon and steelhead fisheries of the Columbia River Basin (Texas A&M University. Libraries, 1989)The Columbia River Basin is the site of a unique regional effort to rebuild populations of Pacific salmon and steelhead trout (Oncorhynchus spp.) that have suffered because of extensive hydroelectric development within the ...
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(Texas A&M University. Libraries, 1987)Forty-six nulliparous beef heifers (16 to 23 mo) of two biological types (SMALL = Red Poll-sired, LARGE = Charolais-sired) were individually fed from d 90 of gestation through parturition. The pregnant heifers were allotted ...
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(Texas A&M University. Libraries, 1982)One hundred and six primiparous Brahman percentage cows were used to determine the effect of suckling manipulation on postpartum reproductive performance. Variables measured included weight, body condition scores, pelvic ...
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(Texas A&M University. Libraries, 1980)Two experiments were conducted to evaluate the effect of mild removal, either by machine milking or suckling, on peripheral patterns of LH and PRL. In Experiment 1, blood samples were collected at 10-min intervals for 12 ...
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(Texas A&M University. Libraries, 1982)Factors affecting egg production and hatching success of the copepod Acartia tonsa Dana were determined by measuring environmental variables and daily egg production of field collected females in the laboratory. During ...
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(Texas A&M University. Libraries, 1990)Two signal transduction systems, adenylate cyclase (AC) and phosphoinositides (PI), have been implicated in the release of luteinizing hormone-releasing hormone (LHRH). A potential linkage between the systems may involve ...
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(Texas A&M University. Libraries, 1982)The objective of this research project was to investigate the effects of nutrition and stress related factors on basic physiological parameters. Studies were designed and conducted independently to evaluate (1) the effects ...
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(Texas A&M University. Libraries, 1991)Two studies were conducted to further understand the involvement of the endogenous opioid peptides (EOPs) in suckling-induced inhibition of LH release. Experiment A in the first study was designed to evaluate the effect ...
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(AgriLife Extension, Texas A&M University System; Texas A&M University. Libraries, )“A cow should have a calf every year.� That is a very straight forward and simple statement, but cattlemen know it takes effort, planning and management to make this happen. One way to achieve this goal is to establish ...
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(Texas A&M University. Libraries, 1987)The objective of the first experiment was to determine if thermal stress directly affects the endocrine regulation of ovulation. Hens were acutely heat stressed to limit the indirect effect of reduced feed consumption on ...
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(2019-10-15)The successful commercialization of the black soldier fly, Hermetia illucens (L.), relies on the maintenance of fecund adults. Current mass-rearing protocols has resulted in variable production of fertile eggs. The root ...
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(Texas A&M University. Libraries, 1994)Eleven Pennisetum orientale L. C. Rich. accessions from different geographical regions were studied at College Station, Texas for chromosome number, morphology, method of reproduction, and fertility. Differences were ...
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(Texas A&M University. Libraries, 1983)
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Ovarian and pituitary function during the post-partum interval in Brahman and Brahman crossbred cows (Texas A&M University. Libraries, 1989)Studies were designed to determine: 1) the effect of post-partum nutritional restriction on serum luteinizing hormone (LH) concentrations and blood metabolites; 2) changes in ovarian cell type numbers, follicular populations, ...
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(Texas A&M University. Libraries, 1978)Two hundred five heifers were utilized to examine factors affecting ovulation, recovery and viability of ova collected surgically and nonsurgically following PMSG/PGF2a treatments. Twenty-four crossbred heifers were divided ...
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(Texas A&M University. Libraries, 1989)Three studies were designed to determine: 1) if the postpartum uterus responds to oxytocin (OT) by releasing prostaglandins (PG) in a dose dependent manner; 2) compare the ability of caruncular (C) and intercaruncular (IC) ...
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(2013-07-22)This dissertation presents three separate studies exploring parents’ perceptions and recommendations for communicating with their third, fourth, and fifth grade children about human sexuality. First, a systematic literature ...
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Prevention of reproductive failure in maize plants at low water potentials by stem tissue infusion (Texas A&M University. Libraries, 1989)A delivery method for rapid external supply of dilute or concentrated doses of water soluble materials to maize plants was developed. The route of access is through a small cavity prepared in the stem which acts as an ...
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(AgriLife Extension, Texas A&M University System; Texas A&M University. Libraries, )Calving difficulty (dystocia) is a concern of every cattleman because it is a major cause of calf deaths and is second only to rebreeding failures in reducing calf crop percentages. Cows that have difficulty during calving ...
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(2023-04-25)Reproductive efficiency is a critical component of a successful cattle operation. Embryo transfer (ET) is a reproductive technology that cattlemen around the world use, to capitalize on elite females by using common females ...