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Interrelationships Of Pacific Herring Clupea Pallasi Populations And Their Relation To Large Scale Environmental And Oceanographic Variables
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Book Synopsis Interrelationships of Pacific Herring, Clupea Pallasi, Populations and Their Relation to Large-scale Environmental and Oceanographic Variables by : Erik Hamilton Williams
Download or read book Interrelationships of Pacific Herring, Clupea Pallasi, Populations and Their Relation to Large-scale Environmental and Oceanographic Variables written by Erik Hamilton Williams and published by . This book was released on 1999 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recruitment estimates for Pacific herring, Clupea pallasi, populations in the Bering Sea and Northeast Pacific Ocean are highly variable, difficult to forecast, and crucial for determining optimum harvest levels. Age-structured population models for annual stock assessments of the sac-roe fisheries rely on fishery and survey age composition data tuned to an auxiliary survey of total biomass. In Chapter 1, the first age-structured model for Norton Sound herring was developed similarly to existing models. Estimates of variability from age-structured stock assessment models for Pacific herring are often not calculated. In Chapter 2, a parametric bootstrap procedure using a fit of the Dirichlet distribution to observed age composition data was developed as a quick and easy method for computing error estimates of model estimates. This bootstrap technique was able to capture variability beyond that of the multinomial distribution. This technique can provide estimates of variability for existing population models with age composition data requiring little change to the original model structure. Recruitment time series from Pacific herring stock assessment models for 14 populations in the Bering Sea and Northeast Pacific Ocean were analyzed for links to the environment. For some populations, recruitment series were extended backward in time using cohort analysis. In chapter 3, correlation and multivariate cluster analyses were applied to determine herring population associations. There appear to be four major herring groups: Bering Sea, outer Gulf of Alaska, coastal Southeast Alaska, and British Columbia. These associations were combined with an exploratory correlation analysis of environmental data in chapter 4. Appropriate time periods for environmental variables were determined for use in Ricker type environmentally dependent spawner-recruit forecasting models. Global and local scale environmental variables were examined in forecasting models, resulting in improvements in recruitment forecasts compared to models without environmental data. The exploratory correlation analysis and best fit models, determined by jacknife error prediction, indicated temperature data corresponding to the year of spawning resulted in the best forecasting models. The Norton Sound age-structured model, parametric bootstrap procedure, and recruitment forecasting models serve as enhancements to the decision process of managing Pacific herring fisheries.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2000 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PICES Scientific Report written by and published by . This book was released on 2001 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Washington Sea Grant Project Completion Summary Report by : Lorenz Hauser
Download or read book Washington Sea Grant Project Completion Summary Report written by Lorenz Hauser and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparative Lipid Class Analysis of Fall and Spring Pacific Herring (clupea Pallasi) by : Rachelle Christian Sloss
Download or read book Comparative Lipid Class Analysis of Fall and Spring Pacific Herring (clupea Pallasi) written by Rachelle Christian Sloss and published by . This book was released on 2011 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1999 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Feeding Dynamics of Larval Pacific Herring (Clupea Pallasi) on Natural Prey Assemblages by : Laura Elizabeth Friedenberg
Download or read book Feeding Dynamics of Larval Pacific Herring (Clupea Pallasi) on Natural Prey Assemblages written by Laura Elizabeth Friedenberg and published by . This book was released on 2009 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Draft Environmental Impact Statement for the Fishery Management Plan for Herring in the Bering-Chukchi Sea by : North Pacific Fishery Management Council
Download or read book Draft Environmental Impact Statement for the Fishery Management Plan for Herring in the Bering-Chukchi Sea written by North Pacific Fishery Management Council and published by . This book was released on 1979 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Some Constant and Some Changing Conditions of Salinity on the Development and Mortality of the Eggs and Larvae of the Pacific Herring CLUPEa PALLASII Cuvier by : Robert Graham McMynn
Download or read book The Effects of Some Constant and Some Changing Conditions of Salinity on the Development and Mortality of the Eggs and Larvae of the Pacific Herring CLUPEa PALLASII Cuvier written by Robert Graham McMynn and published by . This book was released on 1951 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Event Ecology written by Jamie Sue Hebert and published by . This book was released on 2011 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: The conflict over the herring run at Kah Shakes is complicated. In 1991, the Alaska Department of Fish and Game (ADFG) expanded the commercial herring sac roe fishing boundary in the Revillagigedo Channel to include Cat and Dog Islands. Native and non-Native local residents of Ketchikan protested the boundary expansion, as did managers of the neighboring Annette Island Fishery managed by the local reservation. Using cultural anthropological research methods that include ethnographic data, semi-structured, qualitative interviews gathered in southeast Alaska in 2008, and a comprehensive literature review of historic data culled from newspapers and other texts, I examine the many political factors that contribute to this conflict, including the contest between anecdotal and scientific data, the construction of fisheries management boundaries, and issues of collective memory. Using Vayda and Walters' event ecology methodology, bolstered by discourse analysis, I identify three discourses (local ecological knowledge, management and environmental). I use these discourses as comparative units to show that little coincident data can be identified between these discourses. I examine two areas of dissident data, stock definition and measures of abundance, and recommend that local ecological knowledge (LEK) be used to expand the scientific database on which current management techniques depend, to question the accuracy of current ADFG management boundaries and stock identification, and to recalibrate guideline harvest levels by exposing the effects of shifting baselines. I then outline how Geographic Information Systems (GIS) may assist in the validation and integration of LEK into the current fisheries management paradigm to create a more holistic narrative of ecological change.
Book Synopsis Photoenhanced Toxicity of Aqueous Phase and Chemically-dispersed Weathered Alaska North Slope Crude Oil to Pacific Herring Eggs and Larvae by : Mace Gerald Barron
Download or read book Photoenhanced Toxicity of Aqueous Phase and Chemically-dispersed Weathered Alaska North Slope Crude Oil to Pacific Herring Eggs and Larvae written by Mace Gerald Barron and published by . This book was released on 2002 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The photoenhanced toxicity of weathered Alaska North Slope crude oil to eggs and larvae of the Pacific herring (Clupea pallasi), and the relative toxicity of chemically-dispersed and aqueous phase oil were investigated.
Book Synopsis Climate and Fisheries by : D. H. Cushing
Download or read book Climate and Fisheries written by D. H. Cushing and published by . This book was released on 1982 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Fish Resources of the Ocean by : J. A. Gulland
Download or read book The Fish Resources of the Ocean written by J. A. Gulland and published by . This book was released on 1971 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fishers' Knowledge in Fisheries Science and Management by : Nigel Haggan
Download or read book Fishers' Knowledge in Fisheries Science and Management written by Nigel Haggan and published by United Nations Educational, Scientific & Cultural Organization. This book was released on 2007 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drawing on a number of case studies from around the world, this publication considers how the local knowledge and practices of indigenous fishing communities are being used in collaboration with scientists, government managers and non-governmental organisations to establish effective frameworks for sustainable fisheries science and management. It seeks to contribute towards achieving the goal of establishing international responsibility for the ethical collection, preservation, dissemination and application of fishers' knowledge.
Book Synopsis Early Life History and Recruitment in Fish Populations by : R.C. Chambers
Download or read book Early Life History and Recruitment in Fish Populations written by R.C. Chambers and published by Springer Science & Business Media. This book was released on 1997-07-31 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many of the processes influencing recruitment to an adult fish population or entry into a fishery occur very early in life. The variations in life histories and behaviours of young fish and the selective processes operating on this variation ultimately determine the identities and abundance of survivors. This important volume brings together contributions from many of the world's leading researchers from the field of fish ecology. The book focuses on three major themes of pressing importance in the analysis of the role that the early life history of fishes plays in the number and quality of recruits: the selective processes at play in their early life history; the contributions of early life history to the understanding of recruitment.
Book Synopsis Biology and Ecology of Sardines and Anchovies by : Konstantinos Ganias
Download or read book Biology and Ecology of Sardines and Anchovies written by Konstantinos Ganias and published by CRC Press. This book was released on 2014-03-14 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Apart from being commercially and socially significant, anchovies and sardines populations occupy crucial positions in the oceans' ecosystems. Low in the food chain, clupeoids tend towards abundance, as if their purpose in life was to be eaten and fuel the upper levels of marine trophic chains. The present book covers a broad spectrum of topics on
Book Synopsis Risk Evaluation and Biological Reference Points for Fisheries Management by : National Research Council Canada
Download or read book Risk Evaluation and Biological Reference Points for Fisheries Management written by National Research Council Canada and published by NRC Research Press. This book was released on 1993 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented: 1) Reference points for fisheries management: the western Canadian experience; 2) Reference points for fisheries management: the eastern Canadian experience; 3) Reference points for fisheries management: the ICES experience; 4) Spawning stock biomass per recruit in fisheries management: foundation and current use; 5) The development of a management procedure for the South African anchovy resource; 6) How much spawning per recruit is enough?; 7) The behaviour of Flow, Fmed and Fhigh in response to variation in parameters used for their estimation; 8) The Barents Sea capelin stock collapse: a lesson to learn; 9) Variance estimates for fisheries assessment: their importance and how best to evaluate them; 10) Evaluating the accuracy of projected catch estimates from sequential population analysis and trawl survey abundance estimates; 11) Bootstrap estimates of ADAPT parameters, their projection in risk analysis and their retrospective patterns; 12) Analytical estimates of reliability for the projected yield from commercial fisheries; 13) Risk evaluation of the 10% harvest rate procedure for capelin in NAFO Division 3L; 14) Using jackknife and Monte Carlo simulation techniques to evaluate forecast models for Atlantic salmon; 15) Monte Carlo evaluation of risks for biological reference points used in New Zealand fishery assessments; 16) A comparison of event free risk analysis to Ricker spawner-recruit simulation: an example with Atlantic menhaden; 17) Choosing a management strategy for stock rebuilding when control is uncertain; 18) Risks and uncertainties in the management of a single-cohort squid fishery: the Falkland Islands Illex fishery as an example; 19) Risks of over- and under-fishing new resources; 20) Estimation of density-dependent natural mortality in British Columbia herring stocks through SSPA and its impact on sustainable harvesting strategies; 21) The comparative performance of production-model and ad hoc tuned VPA based feedback-control management procedures for the stock of Cape hake off the west coast of Africa; 22) A proposal for a threshold stock size and maximum fishing mortality rate; 23) Biological reference points for Canadian Atlantic gadoid stocks; 24) Stochastic locally-optimal harvesting; 25) ITQ based fisheries management; 26) Bioeconomic methods for determining TACs; 27) Management strategies: fixed or variable catch quotas; 28) Bioeconomic impacts of TAC adjustment strategies: a model applied to northern cod; 29) Experimental management programs for two rockfish stocks off British Columbia; 30)A brief overview of the experimental approach to reducing uncertainty in fisheries management; 31) Fisheries management organizations: a study of uncertainty.
