Download or read book Estimating Pup Production of Northwest Atlantic Harp Seals Pagophilus Groenlandicus in 2012 written by Garry Bruce Stenson and published by . This book was released on 2014 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Estimating Pup Production of Northwest Atlantic Harp Seals Pagophilus Groenlandicus written by Garry B. Stenson and published by . This book was released on 2010 with total page 39 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 2004 Pup Production of Harp Seals Pagophilus Groenlandicus in the Northwest Atlantic written by Garry B. Stenson and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes & presents results of aerial surveys of harp seals conducted March 2004 off the southern Labrador & north-east Newfoundland coasts and in the Gulf of St. Lawrence. Information from the surveys is used to estimate total 2004 seal pup production, which will allow scientists to determine the impact of recent harvests on the seal population. Results are compared with previous estimates to indicate trends in pup production.

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 2004 Pup Production of Harp Seals Pagophilus Groenlandicus in the Northwest Atlantic written by G. B. Stenson and published by . This book was released on 2005 with total page 34 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 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 Automated Recognition of Harp Seal Pups in Aerial Photographs written by Jennifer Renee Woodrow and published by . This book was released on 2008 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Reduction Scenarios for Northwest Atlantic Harp Seals Pagophilus Groenlandicus written by and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Science was requested to examine the following questions: 1) Identify the catches necessary to reduce the population to 5.4 million animals assuming: a) Catches consisting of 90% YOY and 50% YOY b) Over time periods of 5, 10, and 15 years 2) Identify the catches necessary to reduce the population to 6.8 million assuming: a) Catches consisting of 90% YOY and 50% YOY b) Over time periods of 5, 10, a [...] Small numbers of harp seals may remain in southern waters throughout the summer while a portion of the population remains in the Arctic throughout the year. [...] Catch options Science was requested to examine the following questions: 1. Identify the catches necessary to reduce the population to 5.4 million animals assuming: a. Catches consisting of 90% YOY and 50% YOY b. Over time periods of 5, 10, and 15 years 2. Identify the catches necessary to reduce the population to 6.8 million assuming: a. Catches consisting of 90% YOY and 50% YOY b. Over time perio [...] Analyses To examine the impacts of the different population reduction scenarios, the population model was projected into the future, using as a starting point, the estimates of 2014 population size, pup production, natural mortality (M), and carrying capacity (K). [...] The predicted changes in the population trajectory were affected very strongly by the age composition of the harvest used to reduce the population, the speed in which the reduction was achieved, and whether the scenario used a population whose dynamics were assumed to be similar to what has been seen in the past 10 years (Model A) or assumed to vary in a density- dependent manner (Model B).

Download or read book Report on the Meeting of an Ad Hoc Working Group on Assessment of Harp and Hooded Seals in the Northwest Atlantic ICES Headquarters 4 7 October 1982 written by International Council for the Exploration of the Sea. Ad Hoc Working Group on Assessment of Harp and Hooded Seals in the Northwest Atlantic and published by . This book was released on 1983 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Production mortality and sustainable yield of northwest Atlantic harp seals Pagophilus groenlandicus written by G.H. WINTERS and published by . This book was released on 1978 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 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 1999 Pup Production of Harp Seals Phoca Groenlandica in the Northwest Atlantic written by Garry B. (Garry Bruce) Stenson and published by . This book was released on 2000 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the National Marine Mammal Review Committee Harp Seal Review Meeting written by and published by . This book was released on 2000 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents working paper reviews and discussions at a meeting held to provide peer review of the 1999 harp seal survey, recent hunt statistics, information on unreported sources of seal mortality, some new developments in analytical methods, and estimates of total population, in order to assess the status of the north-west Atlantic harp seal population. Topics of papers include estimates of harp seal by-catch, estimates of harp seals struck & lost in the seal hunt, catch at age of harp seals, seal reproductive & pregnancy rates, harp seal pup production, and population estimation methods.

Download or read book Northwest Atlantic Harp Seals written by and published by . This book was released on 2000 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: This bulletin first reviews the harp seal hunt & commercial catches in the Gulf of St. Lawrence, the Canadian Arctic, and the Greenland area. It then discusses the status of the north-west Atlantic harp seal resource with reference to population estimates, pup production in 1999, population dynamics, population models, and prey consumption. Finally, an outlook for the harp seal resource is presented.