Scale Analysis Suggests Frequent Skipping of Second Reproductive Season in Atlantic Herring

Engelhard GH & Heino M (2005). Scale Analysis Suggests Frequent Skipping of Second Reproductive Season in Atlantic Herring. IIASA Interim Report. IIASA, Laxenburg, Austria: IR-05-075

[img]
Preview
Text
IR-05-075.pdf

Download (84kB) | Preview

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: Monograph (IIASA Interim Report)
Uncontrolled Keywords: Clupea harengus; Current and future reproduction; Fishery management; Life-history trade-off; Migration cost; Survival
Research Programs: Adaptive Dynamics Network (ADN)
Depositing User: IIASA Import
Date Deposited: 15 Jan 2016 02:18
Last Modified: 06 Nov 2016 19:45
URI: http://pure.iiasa.ac.at/7767

Actions (login required)

View Item View Item

International Institute for Applied Systems Analysis (IIASA)
Schlossplatz 1, A-2361 Laxenburg, Austria
Phone: (+43 2236) 807 0 Fax:(+43 2236) 71 313