Seventy-one aquatic species including the copepodids and nauplii were identified from Lake Texoma from August 1996 to September 1997. Zooplankton community structure, abundance and spatial and temporal distributions were compared among five lake zones delineated a priori based on chloride concentration. The zones, in order of decreasing chloride concentration, are the Red River zone (RRZ), Red river Transition zone (RRTZ), Main Lake zone (MLZ), Washita River Transition zone (WRTZ) and Washita River zone (WRZ). Bray Curtis Similarity Index showed community structure was most similar in the two Red River arm zones, the two Washita River arm zones and the MLZ. Zooplankton abundance was greatest in the Red River arm (312 org/L), intermediate in the Washita River arm (217 org/L) and least in the Main Lake body (103 org/L). A significant increase in the abundance of a deformed rotifer, Keratella cochlearis, was observed mainly in the Red River arm during a second study from March 1999 to June 1999. Seasonal dynamics, rather than spatial dynamics, were more important in structuring the zooplankton community, especially in the two river arms. Spatial variance was solely attributed to station and zone effects independent of time for a few crustacean species and many of the …

The life history and case-making behaviors of Phylloicus ornatus from two springfed first order streams in the Edwards Plateau Bioregion of Texas were studied from January 1998 to November 1999. Field larval, pupal and adult samples and laboratory rearings indicated a multivoltine cycle. First instars differ from late instars in number of labral setae and in having a unique spur-like claw on each lateral hump. Larval development was asynchronous with second through fifth instars and pupae present most months. First instars were present April through July, October and November. Case making of first instar and case reconstruction of later instars extracted from their cases was documented by videophotography.

Honors thesis written by a student in the UNT Honors College discussing mutations in the Tg737 gene in mice and how this affects neuronal cilia in mice.

Thesis written by a student in the UNT Honors College discussing the problems and variables associated with assessing the total number of neurons in a network from cell seeding concentrations and measurements of network area.

Thesis written by a student in the UNT Honors College discussing independence and maneuverability related to regular exercise among noninstitutionalized elderly adults.

Thesis written by a student in the UNT Honors College discussing the soundness of emu eggshells.

Thesis written by a student in the UNT Honors College discussing the role of the autonomic nervous system in the heart rate variability of day-old emu hatchlings. Atropine and propranolol were administered to block the action of cholinegric and adrenegric pathways and thereby reduce heart rate.