Download or read book Updated Estimates of Reproductive Rates in Northwest Atlantic Harp Seals and the Influence of Body Condition written by Garry B. Stenson and published by . This book was released on 2020 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Estimates of Reproductive Rates for Harp Seals in the Northwest Atlantic written by Becky L. Sjare and published by . This book was released on 2000 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Estimates of Reproduction Rates for Harp Seals in the Northwest Atlantic written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Estimating Pup Production and Population Size of Northwest Atlantic Harp Seal Phoca Groenlandica written by B. P. Healey and published by . This book was released on 2000 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Estimating Carrying Capacity and Population Trends of Northwest Atlantic Harp Seals 1952 2012 written by Michael O. Hammill and published by . This book was released on 2013 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: A population model was used to examine changes in the size of the Northwest Atlantic harp seal population between 1952 and 2012. The model incorporated information on reproductive rates, reported removals, estimates of non-reported removals and losses through bycatch in other fisheries to determine the population trajectory. The model was fit to eleven periodic estimates of pup production from 1952 to 2008, and to annual pregnancy rate data collected between 1954 and 2012. The harp seal (Pagophilus groenlandicus) assessment incorporates information on annual age specific reproductive rates, reported harvests, struck and loss, and ice-related mortality of young of the year (YOY), into an age-structured model to estimate total population size. The model is fitted to estimates of pup production obtained from aerial surveys and mark-recapture studies by adjusting the initial population size in 1952 and adult mortality rates.--Document.

Download or read book Changes in the Reproductive Parameters of Female Harp Seals Pagophilus Groenlandicus in the Northwest Atlantic written by and published by . This book was released on 2004 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data on the north-west Atlantic harp seal population are available from 1980 to the present to examine how reproductive parameters have varied with increasing population size. This report presents & discusses these data with regard to ovulation rates, fertility, age-specific pregnancy rates, and age of sexual maturity. It also examines environmental & fishery data to consider the role of oceanographic conditions and prey abundance & distribution on seal reproductive parameters.

Download or read book Managing for the Future Understanding the Relative Roles of Climate and Fishing on Structure and Dynamics of Marine Ecosystems written by Alida Bundy and published by Frontiers Media SA. This book was released on 2021-11-29 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Estimating Pup Production and Population Size of the Northwest Atlantic Harp Seal Phoca Groenlandica written by B. P. Healey and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to estimate current population size of Northwest Atlantic harp seals using an age structured population model, incorporating recent estimates of reproductive rates, unreported mortality, and pup production. Replacement yields (in units of total removals) and the corresponding levels of reported catch in the Canadian Front and Gulf that would provide such yields are calculated, assuming that other hunt components take the same number of animals as each component did in 1999. In addition, the study presents an estimate of population size in 2005 and 2010 if these replacement yields are taken in the intervening period. Uncertainty in these estimates was determined incorporating the error associated with the available pup production estimates.

Download or read book Current Reproductive and Maturity Rates of Northwest Atlantic Harp Seals Pagophilus Groenlandicus written by Garry Bruce Stenson and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Trends in the Population of Northwest Atlantic Harp Seals Phoca Groenlandica written by G. B. Stenson and published by . This book was released on 1999 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Density dependent and Density independent Factors Influencing Reproductive Rates in Northwest Atlantic Harp Seals Pagophilus Groenlandicus written by Garry Bruce Stenson and published by . This book was released on 2014 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Update on Population Estimates of Harp Seal in the Northwest Atlantic written by and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stock Assessment of Northwest Atlantic Harp Seals Pagophilus Groenlandicus written by and published by . This book was released on 2005 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is not possible to survey the entire harp seal (Pagophilus groenlandicus) population, but the number of pups born in a year can be estimated via aerial surveys conducted in the spring, when the seals gather on the ice to have their pups. This information is incorporated in a population model that also integrates information on age specific reproductive rates and total removals from the population, including animals that have been killed but not recovered. This report presents an estimate of total population of northwest Atlantic harp seals based on aerial surveys carried out in 2004.

Download or read book Estimation of Mortality Rates and Surplus Production of Northwest Atlantic Harp Seals written by G. H. Winters and published by . This book was released on 1976 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Oceanic Abstracts written by and published by . This book was released on 1997-04 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reproductive Rates of Northwest Atlantic Harp Seals 1954 2007 written by and published by . This book was released on 2010 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: