Life Sciences Commons^™

Green Sea Turtle (Chelonia Mydas) Hatchlings Success: The Effects Of Artificial Lights And Other Human Impacts, Hui-Yu Tracy Liang

UNLV Theses, Dissertations, Professional Papers, and Capstones

Sea turtles appeared more than 200 million years ago in the late Triassic period. They grow very slowly, taking an average of 25 years to reach sexual maturity, with a life span averaging 40-50 years. From May to October green sea turtles (Chelonia mydas) emerge during the night and follow light cues toward the sea. Recently, beachfront development has increased hatchling mortality rate. When hatchlings emerge from nest, high densities of artificial lights lead them toward the land where they either desiccate and die, or are preyed upon. Short-wavelength high intensity light and the distance of artificial light are the …

Genetic Parameters Among Weight, Prolificacy, And Wool Traits Of Columbia, Polypay, Rambouillet, And Targhee Sheep, C. M. Bromley, G. D. Snowder, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Genetic parameters for Columbia, Polypay, Rambouillet, and Targhee sheep were estimated using REML with animal models for prolificacy, weight, and wool traits. All bivariate analyses included a covariance between additive genetic effects for the two traits plus appropriate additional covariances. Number of observations by breed ranged from 5,140 to 7,095 for prolificacy traits, from 7,750 to 9,530 for weight traits, and from 4,603 to 34,746 for wool traits. Heritability estimates ranged from .03 to .11 for prolificacy traits (litter size at birth and litter size at weaning), from .09 to .26 for weight traits (birth weight and average daily gain), …

Extending Interval From Seventeen To Nineteen Days In The Melengestrol Acetate - Prostaglandin Estrous Synchronization Program For Heifers, G. H. Deutscher

West Central Research and Extension Center, North Platte

Two experiments were conducted to determine whether extending the interval between removal of melengestrol acetate (MGA) from feed and injection of prostaglandin F_2α (PGF) from 17 to 19 d would affect synchronization of estrus, conception, and pregnancy rates of beef heifers. In both experiments, heifers were fed MGA for 14 d, and PGF was given at either 17 or 19 d after cessation of MGA feeding. Heifers were observed for estrus and artificially inseminated for 5 d after PGF injection.

In Exp. 1, 240 yearling heifers were randomly assigned to either a 17- or a 19-d …

Lack Of Reproduction In Muskoxen And Arctic Hares Caused By Early Winter?, L. David Mech

USGS Northern Prairie Wildlife Research Center

A lack of young muskoxen (Ovibos moschatus) and arctic hares (Lepus arcticus) in the Eureka area of Ellesmere Island, Northwest Territories (now Nunavut), Canada, was observed during summer 1998, in contrast to most other years since 1986. Evidence of malnourished muskoxen was also found. Early winter weather and a consequent 50% reduction of the 1997 summer replenishment period appeared to be the most likely cause, giving rise to a new hypothesis about conditions that might cause adverse demographic effects in arctic herbivores.

Durant l’été 1998, et ce, à la différence de la plupart des années depuis …

Leadership In Wolf, Canis Lupus, Packs, L. David Mech

USGS Northern Prairie Wildlife Research Center

I examine leadership in Wolf (Callis lupus) packs based on published observations and data gathered during summers from 1986 to 1998 studying a free-ranging pack of Wolves on Ellesmere Island that were habituated to my presence. The breeding male tended to initiate activities associated with foraging and travel, and the breeding female to initiate, and predominate in, pup care and protection. However, there was considerable overlap and interaction during these activities such that leadership could be considered a joint function. In packs with multiple breeders, quantitative information about leadership is needed.

Ec00-280 Hiring Dairy Personnel: Making The Process Easier, Jeffrey F. Keown

University of Nebraska-Lincoln Extension: Historical Materials

Position descriptions are essential. A detailed position, or job, description can help you as an employer identify and eliminate applicants who will not perform well on the job and gives you justifiable grounds for terminating an employee who does not perform the job satisfactorily.

On most dairy farms, employees can be grouped into three categories: herd managers, feeders or outdoor workers, and milkers. This extension circular discusses the description for each category, how to start the hiring process, and questions that may be asked during interviewing and after hiring for a position on the dairy farm.

2000 Nebraska Swine Report, Rodger K. Johnson

University of Nebraska-Lincoln Extension: Historical Materials

This publication was prepared by the staff in Animal Science and cooperating Departments for use in Extension, Teaching and Research programs. It deals with the results that were done in reproduction, breeding, health, nutrition, economics and housing of swine.

The Effects Of Plasma Vitamin C And Ceruloplasmin Levels And Exogen Vitamin C Supplementation On Reproduction In Sheep, Seyfullah Hali̇loğlu, Behi̇ç Serpek

Turkish Journal of Veterinary & Animal Sciences

The effects of vitamin C on progesterone and oestradiol 17b synthesis, and fertility rate were studied in Merino sheep. A total of 60 sheep, aged between 2 and 7 years, of which 30 had low, and the other 30 had high plasma vitamin C levels were used. Each low and high vitamin C group was divided into 2 subgroups. Each subgroup had equal numbers of sheep. Subgroups 2 and 4 served as controls in the low and high vitamin C groups, respectively. 500 mg of vitamin C was injected intramuscularly into the subgroups 1 and 3 in the low and …

Reproduction Characteristics Of Thinlip Grey Mullet, Liza Ramada(Risso 1826) Inhabiting Akgöl-Paradeniz Lagoons (Göksu Delta), Serap Ergene Gözükara

Turkish Journal of Zoology

In order to determine the reproduction characteristics of Liza ramada, a fish of economical importance, the GSI, egg diameter, sex maturity, age and sex ratio were examined in 228 specimens caught periodically, between February 1992 and July 1994 in Akgöl-Paradeniz Lagoon. According to the GSI % and egg diameter, the reproduction period of Liza ramada was determinedto be November and December. The lowest GSI % obtained for Liza ramada was 4.99 % in February and the highest values were16.67 % in November and 11.67 % in December. The average egg diameter of Liza ramadaranged from 0.15 to 0.69 mm. It …

Ec00-219 2000 Nebraska Swine Report, Rodger K. Johnson

University of Nebraska-Lincoln Extension: Historical Materials

The 2000 Nebraska Swine Report was prepared by the staff in Animal Science and cooperating Departments for use in Extension, Teaching and Research programs. This publications deals with research on swine reproduction, breeding, health, nutrition, economics, and housing.

The Monthly Variations In The Blood Glucose Level Of Capoeta Capoeta Capoeta (G.Ldenstaedt, 1772) Living In Aras River, Seyi̇t Aydin, Ayhan Yildirim, Orhan Erdoğan

Turkish Journal of Veterinary & Animal Sciences

In this study, the monthly variation in the blood glucose level of Capoeta capoeta capoeta caught from Aras between August 1995 and June 1996 was determined. The average blood glucose level was determined to be 112.04±5.19 mg/dl in males and 106.32±9.68 mg/dl in females and 110.06±4.19 mg/dl in the population. The blood glucose level was highest (141.07±13.67 mg/dl) in April, and lowest (69.14±9.75 mg/dl) in September. It was deter- mined that the level of blood glucose was related to temperature and reproduction.