A trans-Atlantic examination of haddock Melanogrammus aeglefinus food habits

Tam, JC, Link, JS, Large, SI, Bogstad, B, Bundy, A, Cook, AM, Dingsør, GE, Dolgov, AV, Howell, D, Kempf, A, Pinnegar, JK, Rindorf, A, Schückel, S, Sell, AF and Smith, BE (2016) A trans-Atlantic examination of haddock Melanogrammus aeglefinus food habits. Journal of Fish Biology, 88 (6). pp. 2203-2218. ISSN 0022-1112

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Abstract

The food habits of Melanogrammus aeglefinus were explored and contrasted across multiple north-eastern and north-western Atlantic Ocean ecosystems, using databases that span multiple decades. The results show that among all ecosystems, echinoderms are a consistent part of M. aeglefinus diet, but patterns emerge regarding where and when M. aeglefinus primarily eat fishes v. echinoderms. Melanogrammus aeglefinus does not regularly exhibit the increase in piscivory with ontogeny that other gadoids often show, and in several ecosystems there is a lower occurrence of piscivory. There is an apparent inverse relationship between the consumption of fishes and echinoderms in M. aeglefinus over time, where certain years show high levels of one prey item and low levels of the other. This apparent binary choice can be viewed as part of a gradient of prey options, contingent upon a suite of factors external to M. aeglefinus dynamics. The energetic consequences of this prey choice are discussed, noting that in some instances it may not be a choice at all.

Item Type: Article
Uncontrolled Keywords: echinoderms,ecosystem-based fisheries management,piscivory,prey choice
Faculty \ School: Faculty of Science > School of Environmental Sciences
Depositing User: Pure Connector
Date Deposited: 06 Jun 2016 15:00
Last Modified: 22 Apr 2020 01:23
URI: https://ueaeprints.uea.ac.uk/id/eprint/59226
DOI: 10.1111/jfb.12983

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