Search
Now showing items 21-30 of 66
Frequency and amplitude shifts in the whistle vocalizations of bottlenose dolphins in response to anthropogenic noise
(Texas A&M University, 2001)
Anthropogenic noise can have a number of negative effects on cetaceans including the masking of biologically important sounds. Although many observational studies are found in the literature, few data have been published ...
Occurrence, distribution, and movement patterns of outer coastline bottlenose dolphins off Galveston Island, Texas
(Texas A&M University, 2001)
Common bottlenose dolphins (Tursiops truncatus) are widely distributed throughout the Gulf of Mexico. Although several dolphin studies have focused on Galveston Bay, Texas, only one has included the adjacent Gulf of Mexico ...
Population size and contaminant exposure of bats using caves on Fort Hood Military Base
(Texas A&M University, 2001)
Seasonal cave usage patterns were determined in an effort to understand the ecology of a bat colony at Shell Mountain Bat Cave in Fort Hood, Texas. Exit counts were conducted one night each month for 13 consecutive months ...
Aerobic capacities in the heart, kidneys, and splanchnic organs of harbor seals: adaptations to diving hypoxia
(Texas A&M University, 2002)
Pinnipeds (seals and sea lions) have an elevated mitochondrial volume density [Vv(mt)] and citrate synthase (CS) and β-hydroxyacyl-CoA dehydrogenase (HOAD) activity in their swimming muscles, to maintain aerobic metabolism, ...
The effects of cattle grazing on Texas coastal salt marsh plants and birds
(Texas A&M University, 2001)
Cattle grazing effects on plants and birds were examined in Spartina alterniflora-dominated marsh and adjacent Sporobolus virginicus-dominated hummocks within high tidal flats on Galveston Island, Texas. Grazed and ungrazed ...
Monitoring and managing the harvest of tegu lizards in Paraguay
(Texas A&M University, 2002)
Two species of tegu lizards, the black-and-white tegu (Tupinambis merianae) and the red tegu (T. rufescens), are hunted for their skins to supply the exotic leather trade. Tegu lizards were among the most exploited reptiles ...
Computer systems for photo-identification and theodolite tracking of cetaceans
(Texas A&M University, 2001)
Two separate computer-based systems were evaluated for two different methodological techniques (photo-identification and theodolite tracking) of cetacean research. The photo-identification program, Finscan, was evaluated ...
Nest predation, predator abundance, and avian diversity in transmission line corridors and adjacent habitats in east central Texas
(Texas A&M University, 2000)
Transmission line corridors and other types of rights-of-way (ROW) are narrower and more continuous than other types of disturbances and, therefore, result in a proportionately higher amount of "edge" in the vegetation ...
Site selection of Henslow's sparrows wintering on the upper Texas Coast
(Texas A&M University, 2000)
The Henslow's sparrow (Ammodramus henslowii) selects wintering sites that consist of damp areas with tall grasses, standing dead weeds and scattered shrubs. The smallest study site, a grassy opening at W.G. Jones State ...
Macrogeographic variation of nuclear microsatellite loci in an endangered species, Eumetopiias jubatus
(Texas A&M University, 2001)
The Steller sea lion (Eumetopias jubatus) is distributed along the North Pacific Rim from Japan to northern California. The species has experienced a drastic decline from an estimated 240,000-300,000 individuals in the ...