Download or read book Mating Strategies and Reproductive Success of the Male Pacific Harbor Seal phoca Vitulina Richardsi written by Sean Arthur Hayes and published by . This book was released on 2002 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Maternal Traits on Rearing Success in Pacific Harbor Seals Phoca Vitulina Richardsii written by Erin Rose D'Agnese and published by . This book was released on 2015 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photoperiod and the Timing of Pupping in the Pacific Harbor Seal Phoca Vitulina Richardsi with Notes on Reproduction in Northern Fur Seals and Dall Porpoises written by Jonathan L. Temte and published by . This book was released on 1985 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Birth and pupping season records of Pacific harbor seals (Phoca vitulina richardsi) were used in an analysis of photoperiod effect on the timing of birth in this species. Dates and latitudes of births were converted into photoperiods using a photoperiod equation. Sequential dates from parturition were converted into photoperiods and plotted as a function of latitude. The resulting functions of latitude vs. photoperiod were regressed to determine the point during the reproductive cycle at which latitude did not have an effect on photoperiod. The Pacific harbor seal can be divided into two geographic subgroups by their respective pupping seasons. Seals inhabiting the Puget Sound / Strait of Georgia (PS/SG) System give birth to pups an average of 88 days (P
Download or read book The Mating System of Pacific Harbor Seals Phoca Vitulina Richardsi and Its Influence on Estimates of Effective Population Size written by Monica Lin De Angelis and published by . This book was released on 2000 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pacific Harbor Seal Phoca Vitulina Richardsi Monitoring at Point Reyes National Seashore and Golden Gate National Recreation Area 2008 Annual Report written by National Park Service and published by CreateSpace. This book was released on 2013-09-13 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pacific harbor seals (Phoca vitulina richardsi) are the dominant and only year-round resident pinniped in the San Francisco Bay Area, California. Long-term monitoring studies have been conducted at the largest harbor seal colonies in Point Reyes National Seashore since the mid 1970's. The objectives of monitoring each site and the population as a whole are to i) detect changes in population size, ii) detect changes in reproductive success by way of pup production, and iii) identify anthropogenic or environmental factors that may affect the condition of the population (Adams et al. In Prep).
Download or read book Ethology and Behavioral Ecology of Phocids written by Daniel P. Costa and published by Springer Nature. This book was released on 2022-03-17 with total page 651 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phocid (or earless or true) seals are ecologically diverse, occupying habitats from the tropics to the poles in marine and freshwater and feeding on anything from tiny zooplankton to other marine mammals. There are 18 species of phocid seals, the smallest species (ringed seal) is more than 20 times smaller than the largest (southern elephant seal), with marked sexual dimorphism present in some species. This book examines the behavior, ecology, and physiology that allow phocid seals to inhabit such a wide range of habitats. The book is composed of 16 chapters written by 37 authors from 8 countries. The book first describes the general patterns of phocid behavior, followed by descriptions of what is known about well-studied species. We have taken a holistic approach, focusing not only on the behaviors themselves but also on the factors that constrain the expression of behavior and the proximate mechanisms driving behavior. In many cases, the chapters represent collaborations between well-established researchers and early-mid career individuals who bring new perspectives to help carry the field of phocid behavioral ecology well into the future.
Download or read book Photoperiod Control of Reproductive Timing in the Pacific Harbor Seal and the California Sea Lion written by Jonathan Lane Temte and published by . This book was released on 1993 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Territory Defence by Male Harbour Seals Phoca Vitulina at Miquelon written by Elizabeth Anne Perry and published by . This book was released on 1993 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Seasonal Movements and Abundance Dynamics of the Pacific Harbor Seal Phoca Vitulina Richardsi Along the Southern Oregon Coast written by Michael Turner Wilson and published by . This book was released on 1993 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of Abundance and Distribution for Pacific Harbor Seal Phoca Vitulina Richardsi on the Coast of California written by Doyle Alan Hanan and published by . This book was released on 1996 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproductive Strategies of Male Harbour Seals Phoca Vitulina written by S. M. Van Parijs and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Exuberance written by Bruce Bagemihl and published by Macmillan. This book was released on 1999-01-15 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lavishly illustrated and meticulously researched, filled with fascinating facts and astonishing descriptions of animal behavior, "Biological Exuberance" is a groundbreaking book that explodes the myth that homosexuality is not frequently found in nature.
Download or read book Characterization and Epidemiologic Investigation of Apicomplexan Parasites Associated with Meningoencephalitis in Southern Sea Otters Enhydra Lutris Nereis and Pacific Harbor Seals Phoca Vitulina Richardsi written by Melissa Ann Miller and published by . This book was released on 2002 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproductive Parameters and Behavior of Mother and Pup Harbor Seals Phoca Vitulina Richardsi in Grays Harbor Washington written by Janet L. Stein and published by . This book was released on 1989 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Substructure of Pacific Harbor Seal Phoca Vitulina Richardsi Populations Along the Coasts of Oregon and Washington written by Diana Lynn Dishman and published by . This book was released on 2011 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has been assumed that the considerable dispersal ability of many marine species would prevent genetic divergence in the absence of geographic isolation. However, recent work has shown that many marine species often develop differentiation among areas within their known dispersal range. This 'paradox' of marine divergence is particularly important among marine mammal species where behavior can restrict gene flow. To investigate genetic substructure within such a species, I used tissue samples collected from 63 stranded Pacific harbor seals (Phoca vitulina richardsi) in Washington and Oregon between 2006 and 2010 for population stock analysis. DNA was extracted from frozen tissues, and a 551 bp fragment of mtDNA control region sequence and eight microsatellite loci were amplified to investigate localized genetic structure. Minimum spanning network and haplotype frequency analyses of mtDNA sequences indicated that while haplotype lineages are not isolated within a sampling region, there is some evidence of regional differentiation. On the other hand, microsatellite data suggest a lack of substructure among the animals sampled, with only a weak signal of limited gene flow between Puget Sound and coastal areas. Biased dispersal among age classes was also suggested, with juveniles showing less differentiation among areas than adults. Regardless of the historical scenario which has led to this complex pattern of genetic structure in Pacific harbor seals across the Pacific Northwest, my results suggest higher levels of exchange among areas than previously suspected, and will have important consequences for future management considerations for these stocks
Download or read book Genetic Substructure of Pacific Harbor Seals Phoca Vitulina Richardsi Off Washington Oregon and California written by Margaret M. Lamont and published by . This book was released on 1995 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproduction Age Determination and Behavior of the Harbor Seal Phoca Vitulina L in the Gulf of Alaska written by Richard H. Bishop and published by . This book was released on 1967 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
