Scale analysis suggests frequent skipping of the second reproductive season in Atlantic herring

Engelhard GH & Heino M (2005). Scale analysis suggests frequent skipping of the second reproductive season in Atlantic herring. Biology Letters 1 (2): 172-175. DOI:10.1098/rsbl.2004.0290.

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Abstract

A common assumption in fish studies is that iteroparous fish, once mature, normally reproduce in all consecutive seasons. Analysis of scales from Norwegian spring-spawning herring collected between 1935-1973 revealed strong under-representation (47% of expected) of second-time spawners on the spawning grounds. This reduction is not explained satisfactorily by possible errors in scale-reading, suggesting that the second reproductive season is frequently skipped. Skipping a season may relate to trade-offs between growth, current and future reproduction, and survival, which are likely to be particularly strong for young adult herring.

Item Type: Article
Uncontrolled Keywords: Clupea harengus; Current and future reproduction; Fishery management; Life-history trade-off; Migration cost; Survival
Research Programs: Adaptive Dynamics Network (ADN)
Bibliographic Reference: Biology Letters; 1(2):172-175 (22 June 2005)
Depositing User: IIASA Import
Date Deposited: 15 Jan 2016 02:17
Last Modified: 23 Feb 2016 07:57
URI: http://pure.iiasa.ac.at/7499

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