Digital Commons Network^™

Effects Of Indomethacin On Gastric Secretion And Duodenal Ulcer Formation In Bile Duct-Ligated Rats, Diane M. Przewozniak

Masters Theses

No abstract provided.

Morphometric Variation In The Tropical Pocket Gopher (Geomys Tropicalis), Stephen L. Williams, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

The tropical pocket gopher (Geomys tropicalis). which exhibits no chromosomal or genic variation, was examined for variability at the morphometrical level. Univariate and multivariate analyses were used to determine age, sexual, and geographical variation. Significant differences were found between different age classes and between sexes. The amount of individual variation was comparable with other rodents and did not exhibit the reduced variation expressed at the chromosomal and genic levels, G. tropicalis is considered to be a monotypic species.

Kentucky Warbler (Vol. 53, No. 4), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Reproductive And Testicular Characteristics Of Purebred And Crossbred Boars, E. R. Wilson, R. K. Johnson, R. P. Wettemann

Department of Animal Science: Faculty Publications

One-hundred-ninety-five Duroc (D), Hampshire (H), Duroc x Hampshire (D x H) and Hampshire x Duroc (H x D) boars were evaluated for reproductive performance. One-hundred- sixteen boars were castrated at approximately 225 days of age to evaluate testicular and epididymidal weights and sperm numbers. Testes from crossbred boars were 95.33 ± 22.81 g heavier (P<.01) and contained 14.41 ± 3.92 billion more sperm (P<.01) than those from purebred boars. Testes from Hampshire boars were 50.40 ± 31.75 g heavier with 6.27 ± 5.45 billion more sperm than those from Durocs. There were no significant differences between breeds for caput-corpus epididymidal measurements. Durocs had 24.55 ± 12.16 billion more sperm (P<.05) in the cauda epididymis than Hampshire boars. Testes weight and testes sperm numbers were significantly correlated with caput-corpus epididymidal and cauda epididymidal sperm numbers. Correlations of testicular and epididymidal characteristics with growth rate and backfat to 100 kg were small and nonsignificant. Twenty 7.5-month to 9-month-old D1 D x H and H x D boars and 19 H boars were each mated to two Yorkshire gilts to evaluate reproductive efficiency. Conception rates were: D, 63.2%; D x H, 67.5%; H x D, 60.0%; and H, 48.6%. Number of embryos 30-days postbreeding was 10.66 ± .49 and 11.25 ± .43 (P>.10) for gilts mated to purebred and crossbred sires, respectively. Twenty-eight of 36 crossbred boars mated each time they were exposed to an estrus gilt but only 11 of 36 of the purebred boars mated each time. None of the crossbred boars failed to mate …

Productivity, Mortality, And Population Trends Of Wolves In Northeastern Minnesota, L. David Mech

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Population parameters, mortality causes, and mechanisms of a population decline were studied in wolves (Canis lupus lycaon) from 1968 to 1976 in the Superior National Forest. The main method was aerial radio-tracking of 129 wolves and their packmates. Due to a decline in white-tailed deer (Odocoileus virginianus), the wolf population decreased during most of the study. Average annual productivity varied from 1.5 to 3.3 pups per litter, and annual mortality rates from 7 to 65 percent. Malnutrition and intraspecific strife accounted equally for 58 percent of the mortality; human causes accounted for the remainder. As wolf …

Sixty-Five Years Of Whooping Crane Records In Nebraska, Paul A. Johnsgard, Richard Redfield

Paul Johnsgard Collection

In 1933, Myron Swenk determined the status of the Whooping Crane in Nebraska by summarizing all of the records then available to him, and established the general pattern of timing and geographic distribution of Whooping Crane occurrence in this state. Although the population of this species has remained very low since that time, a sufficient number of observations have been made to warrant updating his analysis and comparing the more recent records with these earlier ones. During the summer of 1977 the junior author undertook such a summary as a class project, by extracting such records from all of the …

Habitat Use By Native Gambel' S And Scaled Quail And Released Masked Bobwhite Quail In Southern Arizona, John G. Goodwin Jr., C. Roger Hungerford

Galliformes Specialist Group and Affiliated Societies: Reports and Other Materials

Populations of both Gambel's and scaled quail surveyed in southern Arizona declined by 60% from October 1975 to June 1976. Masked bobwhite population density increased during the study because of additional releases, but survival patterns are uncertain. Raptors were efficient quail predators.

Gambel's quail were associated with a dense overstory of mesquite, hackberry, wolfberry, and catclaw. Understory species varied in density and appeared less essential to good habitat. Scaled quail preferred open, grass-shrub habitat, with few of the plants over 6 feet tall. Masked bobwhite selected dense, grass-weed habitat, with pigweed a characteristic species.

Green vegetation and insects were seasonally …

Wolf-Pack Buffer Zones As Prey Reservoirs, L. David Mech

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Abstract. In a declining herd, surviving deer inhabited overlapping edges of wolf- pack territories. There, wolves hunted little until desperate, in order to avoid fatal encounters with neighbors. Such encounters reduce wolf numbers and predation pressure and apparently allow surviving deer along territory edges to repopulate the area through dispersal of their prime, less vulnerable offspring into territory cores.

Fisheries Report No 30 - The Wildlife Of The Proposed Karroun Hill Nature Reserve, Western Australia, W. K. Youngson, N. L. Mckenzie

Fisheries Research Reports

Plants and vertebrate animals were recorded from a proposed 300 000 ha nature reserve centred on Karroun Hill in the goldfields of Western Australia (30°03'S; 118°02'E).

Plant communities are described in terms of their structurally important species and related to local physiography.

Fifteen native mammal species, sixty-four bird species, twenty-four reptile species and one amphibian were recorded. Annotated lists are presented. The wildlife reflects the transitional nature of the Coolgardie Botanical District. Both Eremean and South Western Province species were recorded.

Description Of The Larval Development Of Squilla Empusa Say (Crustacea Stomatopoda) With Aspects Of Larval Ecology In Chesapeake Bay, Steven Gaines Morgan

OES Theses and Dissertations

Larvae of Sguilla empusa were collected from the plankton and were reared in the laboratory to describe the pelagic larval development and the postlarval stage. Nine pelagic stages are passed through before the postlarval stage is attained.

The larvae reared for descriptive purposes were subjected to sixteen combinations of temperature and salinity to determine their tolerance to the two parameters. Larvae survived longer and molted more frequently when reared at 25°/oo and 20°C or 25°C, which corresponds to the natural conditions of the Chesapeake Bay when the larvae were collected.

A three year planktonic survey conducted in the lower region …

Bird Use Of Revetted Riverbanks In The Willamette Valley, Clifford Brian Perry

Dissertations and Theses

Over 115 miles of rock revetments that serve to protect river banks have been constructed in the Willamette Basin. In this study the spring and summer bird use of Willamette Basin revetments is examined. Revetments that had not been recently cleared of most woody vegetation and blackberries were found to have significantly greater total and breeding bird use than cleared revetments. Possible factors affecting bird use, such as vegetation on revetments and vegetation adjacent to revetments are examined using linear regression analysis. The results of this study are compared with results of previous work in riparian forests along the Columbia …

Research For Connecticut By The Storrs Agricultural Experiment Station

Storrs Agricultural Experiment Station

No abstract provided.

An Evaluation Of Narrow Hybrid Zones In Vertebrates, William S. Moore

Biological Sciences Faculty Research Publications

A review of the literature on vertebrate hybridization reveals the existence of a number of narrow hybrid zones. Three hypotheses have been suggested to explain the occurrence of these zones. The ephemeral-zone hypothesis states that hybridization will end either in speciation or fusion of the hybridizing taxa by means of introgression. The dynamic-equilibrium hypothesis allows the possibility that narrow hybrid zones might be stable: where hybrids are confined to a small area by steep selection gradients, "crystallization" of an antihybridization mechanism might be prevented by naive immigrants from the parental populations even though hybrids are selected against. The hybrid-superiority hypothesis …

Whole Issue Nebraska Bird Review (September 1977) 45(3)

Nebraska Bird Review

TABLE OF CONTENTS

1977 (Fifty-second) Spring Migration and Occurrence Report .............................34

Poor-wills in Lancaster and Saunders Counties............................42

The Swanskin ............................................. 45

Book Reviews .................................................................. 50

Notes ......................................................................... 51

Comparison Of Coyote And Coyote × Dog Hybrid Food Habits In Southeastern Nebraska, Brian R. Mahan

University of Nebraska State Museum: Mammalogy Papers

The recent taxonomic study by Mahan et al. (1978) documented the occurrence of coyote (Canis latrans) x dog (c. familiaris) hybrids in Nebraska. This study, and those by Freeman (1976) in Oklahoma and Gipson et al. (1974) in Arkansas show coyote x dog hybrids, though not abundant, to be numerous in some areas. The purpose of the present study was to compare the stomach contents of coyote x dog hybrids collected by Mahan et al. (1978) from southeastern Nebraska with those of contemporary coyotes.

Stomachs of 12 coyote x dog hybrids and 16 coyotes collected November 1975 …

Distribution And Behavior Study Of Diurnal Tree Squirrels In Portland, Oregon, With Emphasis On The Western Gray Squirrel (Sciurus Griseus Griseus Ord) And The Western Fox Squirrel (S. Niger Rufiventer E. Geoffroy St.-Hilaire), Ira Young Rice Iii

Dissertations and Theses

Populations of diurnal tree squirrels in the Portland area were located by mail surveys, personal interviews, and field inspections. Pine squirrels were found to reside in thickly wooded residential areas with dense understories and running water nearby. Western gray squirrels occupied habitats in relatively quiet residential neighborhoods, in areas well supplied with mast crops. Western fox squirrels were found to coexist with gray squirrels in their preferred habitat, and also to thrive in park settings with few mast trees and high activity and noise levels. In areas occupied by both fox and gray squirrels, dominant-subordinate relationships were noted. Each species …

Hsus Spotlights Circus Cruelty

Close Up Reports

Society has sideshow operator arrested in three states

Kentucky Warbler (Vol. 53, No. 3), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Seasonal Abundance & Diversity Of Fishes At Three Stations On The Middle Fork Of Drake's Creek, Warren & Allen Counties, Kentucky, David Bell

Masters Theses & Specialist Projects

A total of 7,485 fish, representing 49 species, 25 genera, and 11 families, were electroshocked from three stations on the Middle Fork of Drake's Creek during the period January, 1972 through January, 1973. Community structure was influenced by seasonal changes in both numbers of species and numbers of individuals. The number of species per collection was at its highest, at all stations, during the month of September. The total number of species and individuals collected at each station progressively increased toward the upstream areas. Eleven of the forty-nine species collected during the course of the study provided 91.8% of the …

The Accumulation And Metabolism Of Triphenyltin Hydroxide (Du-Ter) In Crayfish (Procambarus Clarkii) In A Model Ecosystem, John Gary Hollingshaus

Theses and Dissertations

Triphenyltin hydroxide (TPTH) appears to be relatively stable in soil. Only minor partitioning into water occurred because of the insolubility of TPTH in water and its adsorption to soil. Residues in the water were also relatively stable. The concentration. of TPTH in the tissues of crayfish exposed to 1.0 ppm of TPTH in the soil was 0.1 ppm or 10% that of the environment. Crayfish exposed to 0.01 ppm of TPTH in the soil had 0.005 ppm TPTH in their tissues or 50% that of the environment. Greater than 80% of the residue in the muscle tissue appeared to be …

State Of The Fisheries Report 1976, Department Of Fisheries And Wildlife, Western Australia

Status Reports of the Fisheries and Aquatic Resources

The total value of the fisheries of Western Australia is the highest of any of the States, and the Western Australian rock lobster fishery is the most valuable single fishery in Australia.

Effect Of Cold Exposure On Serum Levels Of Corticosteroid-Binding Globulin In Male And Virgin Female Rats, Erik R. Larsen

Masters Theses

No abstract provided.

The Mammals Of Zion National Park With Emphasis On Ecology And Distribution Of Twelve Species Of Rodents, Paul A. Gardner

Theses and Dissertations

Information concerning the mammals of Zion National Park was needed for management purposes and general information. During the summers of 1975 and 1976, mammals observed throughout the park were recorded and habitat structure was measured for each animal at the immediate observation site. Ordinations based on stepwise discriminant analyses of the data on 12 rodent species were constructed and substantiated by Bray-Curtis analyses. The results showed that amounts of cover and boulders contrasted the habitats of Peromyscus eremicus, P. maniculatus, P. crinitus, P. boylii and P. truei. A second group of species--Eutamias minimus, E. umbrinus, Spermophilus variegatus, Tamiasciurus hudsonicus, Dipodomys …

Behavior And Age Class Structure Of Wintering Northern Bald Eagles (Haliaeetus Leucocephalus Alascanus) In Western Utah, Ronald A. Joseph

Theses and Dissertations

Bald Eagles in Cedar and Rush Valleys of western Utah were studied from 1975 to 1977. Arriving in mid-November, the eagles departed in mid-March. A statewide Bald Eagle census revealed 200 to 300 birds. Wintering eagle populations have remained stable for the past 10 years. Immatures comprised 35% of the population in 1975-76 and 33% in 1976-77. While Black-tailed jackrabbits are the primary food source of wintering eagles in western Utah, other mammalian carrion serve as supplementary food items. Eagles utilized 4 communal night roosts. Three day communal roosts were located on south facing slopes. The social existence of Bald …

Meeting Of The Elephant Interest Group At Michigan State University, June 21, 1977, Jeheskel Shoshani

Elephant

Digest of the minutes of the first informal meeting of the Elephant Interest Group at the 57th Annual Meeting of the American Society of Mamalogists (ASM).

Aboriginal Exploitation Of Marine Food Resources, Alan J. Osborn

Department of Anthropology: Theses and Student Research

Anthropological interest in human exploitation of resources has increased considerably during the last decade. Archaeological and ethnological literature concerning man's utilization of the world's oceans is relatively abundant and there are now several on-going anthropological research programs, e.g., Aleutian Islands, Pacific Northwest Coast, California, Hawaii, Australia, New Zealand, Peru, Ecuador, Chile, and Southern Africa which focus primarily on maritime adaptations. The purpose of this study is threefold: (1) to suggest that anthropological assumptions regarding marine food resources and their use are inadequate; (2) to examine marine ecosystems with respect to structure and dynamics, primary productivity, ecological efficiencies, distributional and quantitative …

The Effects Of Temperature And Salinity On The Larval Development Of The Grass Shrimp, Palaemonetes Pugio Holthuis Reared In The Laboratory, William Ray Floyd Iii

OES Theses and Dissertations

Palaemonetes pugio larvae, obtained by induced breeding of adults collected in the late fall of 1975 from the Lafayette River, Norfolk, Virginia, were reared in the laboratory using a six temperature by seven salinity factorial design in order to determine the effects of these factors on larval development. Test conditions involved temperature levels ranging from 10°C to 32.5°C and salinity levels from 5°/oo to 35°/oo. At each temperature-salinity condition, 36 larvae were reared individually in 25 ml of artificial seawater containing 25 mg/kg of polyethylene oxide. Food consisted of Artemia nauplii at a concentration of 30/ml of culture water. From …

Age-Season Adjustment Factors Considering Herd Feeding Practices, G. R. Wiggans, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

The influence of percent of net energy in the herd's ration derived from concentrates on age-season effects was studied in New York Holstein Dairy Herd Improvement records. Ten feeding groups were defined by herd-feeding information. There was some increase in milk yield with an increasing proportion of concentrates in the ration. For six of these groups, the two highest, two middle, and two lowest in percent net energy from concentrates, age-season effects were calculated. The trends in age effects and seasonal effects were similar for all groups with the groups having a higher fraction of net energy from concentrates showing …

Struggle To Save Dolphins Continuing

Close Up Reports

New House Bill OKs Dolphin Deaths; HSUS Continuing Battle in Senate

Whole Issue Nebraska Bird Review (June 1977) 45(2)

Nebraska Bird Review

TABLE OF CONTENTS

Great-tailed Grackles Nesting in Nebraska ......................................... 18

1976 (Nineteenth) Fall Occurrence Report ......................................... 18

The Seventy-sixth Annual Meeting ................................................ 30

Book Reviews .......................................................... 31

Note ....................................32