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Author:
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 10
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Author:
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 10
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Author: Dennis W. Lee
Publisher:
ISBN:
Category : Billfishes
Languages : en
Pages : 48
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 180
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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 978
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Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9251311765
Category : Technology & Engineering
Languages : en
Pages : 196
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Book Description
This handbook provides guidance on methods for use in fish ageing studies. Fish age, among other biological parameters, is one of the most relevant pieces of data to attain sustainable exploitation levels of fishery resources. Indeed, most analytical methods used in stock assessment require knowledge of demographic structure according to age of stocks, as well as to recruitment, growth, maturity, natural mortality, etc., which are strictly linked to information on age and age structure. The handbook was put together to deal with identified gaps – which affect both the precision and the accuracy of estimations – regarding ageing schemes, criteria and methodologies used in preparing calcified structures. It focuses on the general principles that underpin age analysis (assignment of birth date, preparation methods, aging scheme reading and identification of true and false rings). Crucially, it aims to contribute to the establishment of common analysis methods, which can enable better calibration across the diverse institutes involved, thereby improving the quality and reliability of results.
Author: Steven E. Campana
Publisher: Food & Agriculture Organization of the UN (FAO)
ISBN:
Category : Nature
Languages : en
Pages : 56
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Book Description
Age information is an essential component in growth rate, mortality rate and productivity calculations, hence it is classified among the most influential of biological variables. In this manual, the most recognized age determination methods for elasmobranchs have been brought together so as to provide a detailed and hands-on guide to successful and validated methods for ageing sharks, skates and rays. Particular emphasis is given to vertebral sections and image analysis techniques as applied to elasmobranch species from the Mediterranean Sea, suited to both novice and experienced age readers.
Author: F. E. Lux
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 7
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 232
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Author: Fish and Wildlife Reference Service (U.S.)
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages :
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