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Now showing items 81-90 of 161
The effects of woody patches of habitat on grassland small mammals.
(2002)
To understand better the influence of habitat modifications on grassland ecosystems, I examined the effects of woody patches on the species richness, species diversity, and total density of grassland small mammals; the ...
The Evolution Of Reproductive Isolation In A Temporally Complex Passerine Hybrid Zone
(2014)
Understanding the relative importance of reproductive isolating barriers between populations allows us learn what processes are most prevalent in causing speciation. Hybrid zones, where distinguishable populations interbreed, ...
A geography of extinction: Patterns in the contraction of geographic ranges.
(1998)
I examined the contraction of geographic ranges in 245 species. Remnant portions of the geographic range tended to persist in the periphery of the species' historical range. Larger patches of the geographic ranges persisted ...
Avian behavior in a changing world: how human effects change behavioral expression at the individual, population, and community level
(2023-05-12)
Human induced rapid environmental change (HIREC) is one of the largest threats to avian biodiversity and abundance (Rosenberg et al. 2019; Sih, Ferrari, and Harris 2011). Since selection acts on individual behavioral ...
The ecology of the exotic cladoceran zooplankton, Daphnia lumholtzi (Sars), in Lake Texoma, Oklahoma - Texas.
(1997)
In Chapter 1, I present the initial data on the distribution and abundance of Daphnia lumholtzi during the summer of 1993. Lake Texoma has variable and often strong horizontal gradients in temperature, conductivity, and ...
Factors affecting mercury contamination in fish from Caddo Lake, Texas.
(2007)
We conducted a survey of mercury contamination in largemouth bass ( Micropterus salmoides) from Caddo Lake, Texas, and found that largemouth bass collected from forested wetland habitats had higher concentrations of mercury ...
The novelty response of pulse-type weakly electric fish :
(1985)
A series of experiments was performed to investigate various behavioral and neurophysiological aspects of the Novelty Response (NR) of pulse-type weakly electric fish. The NR is a reflexive behavior in which the fish ...
MATE CHOICE, ILLUSIONS, AND BEHAVIORAL DIVERGENCE IN POECILIIDAE
(2019-12-13)
Chapter 1: Illusions are commonplace and distort perception in ways that make objects appear different from reality. Such phenomena may also play a role in mate evaluation because body size and ornament size are signals ...
Factors influencing the variance in sign learning performance by four juvenile orangutans (Pongo pygmaeus) /
(The University of Oklahoma., 1985)
Following the methods of Gardner and Gardner 1969 and Fouts 1973 , ten signs (American Sign Language) were trained to four juvenile orangutans. None of the subjects acquired all of the signs even after 2400 trials ...