Download or read book Ecology and Physiology of a Black Bear Ursus Americanus Population in the Great Dismal Swamp and Reproduction Physiology in the Captive Female Black Bear written by Eric Charles Hellgren and published by . This book was released on 1988 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book General Technical Report SRS written by and published by . This book was released on 1995 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Forested Wetlands of the Southern United States written by and published by . This book was released on 2001 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Natural History of the Great Dismal Swamp written by Robert K. Rose and published by . This book was released on 2000 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wildlife Review written by and published by . This book was released on 1989 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Analysis and Evaluation of a Black Bear Sanctuary in Western North Carolina written by Roger A. Powell and published by . This book was released on 1992 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Annual Conference Southeastern Association of Fish and Wildlife Agencies written by Southeastern Association of Fish and Wildlife Agencies and published by . This book was released on 1994 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bears their Biology and Management written by James J. Claar and published by International Association for Bear Research & Management. This book was released on 1994 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Canadian Journal of Zoology written by and published by . This book was released on 2001 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bears their Biology and Management written by Laura M. Darling and published by International Association for Bear Research & Management. This book was released on 1990 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Virginia Black Bear Management Plan 2001 2010 written by and published by . This book was released on 2002 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: The Plan -- Development of the plan -- Plan format -- Interim changes - Acknowledgments -- Life history of black bears -- Black bear program history -- Selected bibliography for black bear history -- Supply -- Demand -- Selected bibliography for black bear supply and demand -- Black bear management objectives -- Black bear management options -- Conclusion -- Literature cited for black management options -- Bear populations and density -- Bear related recreation -- Human-bear problems -- Appendices - Figures.

Download or read book Reproductive Ecology Cub Survival and Denning Ecology of Florida Black Bears written by Elina Paivikki Garrison and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: The Florida black bear (Ursus americanus floridanus) currently occurs in several geographically isolated sub-populations. Successful management of the remaining black bear populations in a human-dominated landscape necessitates an understanding of all aspects of black bear ecology, but data on critical demographic variables and denning ecology for the Florida black bear are scarce. Using data from a 4-year (1999-2003) study, I investigated reproductive parameters, cub survival and denning ecology of Florida black bears in Ocala National Forest (ONF) and the adjacent residential area of Lynne, Florida. Thirty-nine litters produced 81 cubs (39M, 42F) for an average litter size of 2.08 " 0.11. Females produced their first litters at ages 2-6; the mean age of first reproduction was 3.46 " 0.33 years.

Download or read book Ecology and Behaviour of North American Black Bears written by Roger A. Powell and published by Springer Science & Business Media. This book was released on 1997 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: What main factors affect mammalian home range size and dynamics? To what extent do constraints on home range characteristics vary between the sexes? This book aims to address these issues by concentrating the authors' expertise and experience in studies of home ranges in general and focusing on their studies of black bears of the Pisgah Forest, North Carolina, in particular. The authors provide an overview of the black bears and methods for their study before discussing concepts of home range, developing predictive habitat quality models, addressing influences of food production on social organization and exploring the mating behaviour of male bears.

Download or read book Wild Mammals of North America written by George A. Feldhamer and published by JHU Press. This book was released on 2003-11-19 with total page 1250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Table of contents

Download or read book American Black Bear written by and published by . This book was released on 1995 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sequential Ovulation Fertility of Polyestrus and Induced Ovulation in American Black Bears Ursus Americanus written by Brendan Matthew Himelright and published by . This book was released on 2014 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Improving our understanding of the reproductive physiology of bears is critical for effective conservation and management of both captive and wild bears. Increasing our knowledge of bear reproductive physiology is of ever increasing importance due to the fact six of eight species are either threatened or endangered on a global scale, and all 8 species are threatened with extinction in at least some of their range. Bears evolved several unique reproductive physiological adaptations, including multiple paternity and delayed implantation, but other more subtle adaptations may exist as well. This thesis studied, during three mating seasons, a semi-free ranging population of the non-threatened American black bear (Ursus americanus) to better understand the subtle intricacies of the reproductive physiology in bears. This study examined equal estrus fertility and sequential ovulation. Sequential ovulation is defined as ovulations occurring during each estrus, which are temporally sequential. Equal estrus fertility is defined as equal fertility of each estrus of a polyestrous female regardless of current pregnancy status. Ovaries were examined to determine if sequential ovulation occurred in each estrus of polyestrous females. During the mating season, females were anesthetized and their ovaries were observed to document ovulatory events, which allowed accurate pairing of an ovulation with a specific estrus. The presence of both a corpus luteum (CL) and corpus hemorrhagicum (CH) in the same female as well as a recent and well developed CL in 2 of 4 polyestrous females confirms temporally distinct ovulatory events (sequential ovulation) in this study population. Breeding behavior of females was extensively observed and recorded during the breeding seasons to determine if each estrus was fertile regardless of conception status. All mating behavior was recorded until females were anesthetized for examination and embryo extraction. Matching conception to a specific estrus was achieved using paternity testing and examining embryo development. Paternity results of 9 embryos from 6 polyestrous females showed 4 embryos were conceived during the first estrus while 5 were conceived during the second estrus, clearly indicating equal estrus fertility regardless of current conception status. These results strongly indicate the potential of superfetation in the American black bear and provide insight into the complex behavioral and physiological breeding mechanisms of bears. Captive breeding programs may eventually be able to breed females with different males during each estrus to potentially increase the chances of multiple paternity. Induced ovulation has been widely assumed in bears, yet little conclusive evidence exists. The third chapter of this thesis reexamines this question by looking at both hormonal data of isolated females during the mating season and anatomical data of ovulatory events from both successfully bred and unsuccessfully bred females. The estrogen profiles showed clear indications ovulation did occur in the nonmated and isolated females. Ovulatory events also occurred in unsuccessfully mated females, which also had a higher average number of ovulatory events compared to successfully bred females. Although preliminary, the combination of these data challenge the assumption that bears are induced ovulators. Further research is needed to resolve this matter conclusively.

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1989 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt: