Life Sciences Commons^™

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.

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

USGS Northern Prairie Wildlife Research Center

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 …

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

USGS Northern Prairie Wildlife Research Center

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.

The Prairie Naturalist Vol. 9, Nos. 3 And 4. September-December, 1977

The Prairie Naturalist

UPLAND NESTING OF AMERICAN BITTERNS, MARSH HAWKS, AND SHORT-EARED OWLS ▪ H. F. Duebbert and J. T. Lokemoen

ROADSIDE NESTING BY PRAIRIE GROUSE IN NORTHWEST MINNESOTA ▪ W. D. Svedarsky

BOHEMIAN WAXWING POPULATIONS AND WINTER ECOLOGY IN NORTH DAKOTA ▪ E. L. Bakke

AGEING ARCHAEOLOGICAL BISON BY DENTAL ANNULI ▪ J. C. Pigage and M. G. McKenna

COMPARISON OF COYOTE AND COYOTE X DOG HYBRID FOOD HABITS IN SOUTHEASTERN NEBRASKA ▪ B.R. Mahan

NOTES

Abnormal Mid-May Occurrence of White-fronted Geese in Sheridan County, North Dakota ▪ D.P. Kibbe and J. A. Roppe

Common Grackle Preys on Spotted Sandpiper Chick ▪ …

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 …

The Prairie Naturalist Volume 9, No. 2. June 1977

The Prairie Naturalist

PROPAGULE DISPERSAL AMONG FOREST ISLANDS IN SOUTHEASTERN SOUTH DAKOTA ▪ J. W. Ranney and W. C. Johnson

GENERAL WEATHER CONSIDERATIONS FOR THE PRESCRIDED BURNING OF PRAIRIE IN NORTHWEST MINNESOTA ▪ W. D. Svedarsky and R. W. Sands

YELLOW-CROWNED NIGHT HERONS SIGHTED IN NORTH DAKOTA ▪ D. G. Jorde, G. L. Krapu, and R. K. Green

The Prairie Naturalist Volume 9, No. 1. March 1977

The Prairie Naturalist

NESTING BY FERRUGINOUS HAWKS AND OTHER RAPTORS ON HIGH VOLTAGE POWERLINE TOWERS ▪ D. S. Gilmer and J. M. Wiebe

ARTHROPODS CONSUMED BY AN IMMATURE MARBLED GODWIT ▪ R. M. Timm and R. M. Zink

NOTES

Black-headed Grosbeak in Jamestown, North Dakota ▪ R. Lender

Summer Record of Red-breasted Nuthatch in North Dakota ▪ R. Lender

BOOK REVIEWS

Minnesota's Wild Flowers ▪ Staff

In Search of Eagles ▪ J. Lokemoen

Forest and Range Research ▪ Staff

An Economic Analysis of Recycling ▪ Staff