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Author: George Armytage Rounsefell
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 32
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Book Description
Author: George Armytage Rounsefell
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 32
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Book Description
Author: U.S. Fish and Wildlife Service
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 248
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Book Description
Author: Food and Agriculture Organization of the United Nations. Coordinating Working Party on Atlantic Fishery Statistics
Publisher: Food & Agriculture Org.
ISBN: 9789251036860
Category : Fisheries
Languages : en
Pages : 60
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Book Description
Three major topics were considered. The first concerned the future role of the CWP following its reconstitution and the adoption of new statutes and rules of procedure. The second major topic concerned international initiatives of relevance to the CWP. The third major topic concerned the improvement of the reliability of fishery statistics, including consideration of the consequences and extent of the problem of non-reporting and mis-reporting. Other topics considered included a review of recommendations from the Fifteenth Session of CWP; modifications to programmes in relation to fishery statistics; exchange of national fishery statistics on electronic media; modifications to STATLANT questionnaires; discrepencies among agency databases; bycatch and discard data; recreational and subsistence fishery statistics; fleet statistics; aquaculture statistics; conversion factors; country and nationality issues, and economic statistics.
Author: Alexander J. Chester
Publisher:
ISBN:
Category : Atlantic menhaden
Languages : en
Pages : 464
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Book Description
Atlantic menhaden, Brevootia tyrannus, the object of a major purse-seine fishery along the U.S. east coast, are landed at plants from northern Florida to central Maine. The National Marine Fisheries Service has sampled these landings since 1955 for length, weight, and age. Together with records of landings at each plant, the samples are used to estimate numbers of fish landed at each age. This report analyzes the sampling design in terms of probability sampling theory. The design is classified as two-stage cluster sampling, the first stage consisting of purse-seine sets randomly selected from the population of all sets landed, and the second state consisting of fish randomly selected from each sample set. Implicit assumptions of this design are discussed with special attention to current sampling procedures. Methods are developed for estimating mean fish weight, numbers of fish landed, and age composition of the catch, with approximate 95% confidence intervals. Based on specific results from three ports (Port Monmouth, N.J., Reedville, Va., and Beaufort, N.C.) for the 1979 fishing season, recommendations are made for improving sampling procedures to comply more exactly with assumptions of the sampling design. These recommendations include adopting more formal methods for randomizing set and fish selection, increasing the number of sets sampled, considering the bias introduced by unequal set sizes, and developing methods to optimize the use of funds and personnel.
Author: Food and Agriculture Organization of the United Nations. Fisheries Division
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 217
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Book Description
Author: Coordinating Working Party on Atlantic Fishery Statistics. Session
Publisher: Food & Agriculture Org.
ISBN: 9789251025796
Category : Fisheries
Languages : en
Pages : 40
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Book Description
The report of the thirteenth session of the Coordinating Working Party on Atlantic Fishery Statistics (CWP) held in Rome, Italy, 11-18 February 1987, is presented. The EC Commission, FAO, ICCAT, ICES, ICSEAF, NAFO, OECD were the participating agencies. Major topics considered were: review of recommendations and proposals from CWP-12 and progress; agency programmes and publications presenting Atlantic fishery statistics; statistics on discards; review of the operation of the STATLANT system; procedures for handling discrepancies in databases; Ad-Hoc Global Consultation on Tuna Statistics; integration of value data into databases; STATLANT B data; handbook of fishery statistics; aquaculture enquiries; fishing fleet statistics; nationality issues; food balance sheets.
Author:
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 136
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Book Description
Author: International Commission for the Northwest Atlantic Fisheries
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309055261
Category : Technology & Engineering
Languages : en
Pages : 189
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Book Description
Fluctuations and declines in marine fish populations have caused growing concern among marine scientists, fisheries managers, commercial and recreational fishers, and the public. Sustaining Marine Fisheries explores the nature of marine ecosystems and the complex interacting factors that shape their productivity. The book documents the condition of marine fisheries today, highlighting species and geographic areas that are under particular stress. Challenges to achieving sustainability are discussed, and shortcomings of existing fisheries management and regulation are examined. The volume calls for fisheries management to adopt a broader ecosystem perspective that encompasses all relevant environmental and human influences. Sustaining Marine Fisheries offers new approaches to building workable fisheries management institutions, improving scientific data, and developing management tools. The book recommends ways to change current practices that encourage overexploitation of fish resources. It will be of special interest to marine policymakers and ecologists, fisheries regulators and managers, fisheries scientists and marine ecologists, fishers, and concerned individuals.
