Age determination in fishes using hard parts

Abdussamad, E M (2015) Age determination in fishes using hard parts. In: Training Manual Fish Stock Assessment and Management. ICAR- Central Marine Fisheries Research Institute, Kochi, pp. 87-90. ISBN 978-93-82263-07-4

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Abstract

Fisheries management relies on understanding the fish population dynamics while determining the biological parameters, including size at maturity, duration of spawning season, mortality estimates, age and growth, Accurate information on age of fish is an important pre-requisite for extracting precise information on growth, mortality, recruitment and other fundamental population parameters of fishes for stock assessment. The outcome of conventional age estimates using length frequency data depends upon the sample quality, selectivity of the fishing gear etc. The stock assessment results may therefore be affected and sometimes give results which is having no bearing on reality. The hard parts of the fishes also grow with the fish and the growth process may left some inscription on such parts and if that can be interpreted properly, will get precise idea on growth. These inscriptions may result from either changes in the environment which the fish inhabits, or food availability, or physiological states of the fish. However, free swimming fishes always lives in ideal conditions and do not leave any environment related markings in their skeletal structures. So interpretation of hard part inscriptions need utmost care.

Item Type:	Book Section
Uncontrolled Keywords:	Age determination
Subjects:	Fish and Fisheries > Fish biology > Age and growth
Divisions:	CMFRI-Kochi > Marine Capture > Shellfish Fisheries Division Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Shellfish Fisheries Division CMFRI-Kochi > Marine Capture > Shellfish Fisheries Division Subject Area > CMFRI-Kochi > Marine Capture > Shellfish Fisheries Division
Depositing User:	Arun Surendran
Date Deposited:	05 Aug 2024 08:57
Last Modified:	05 Aug 2024 08:57
URI:	http://eprints.cmfri.org.in/id/eprint/18688

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