Implications of a warming North Sea for the growth of haddock Melanogrammus aeglefinus

A R Baudron, C L Needle, C T Marshall

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The present study aimed firstly, to test for a temperature effect on North Sea haddock Melanogrammus aeglefinus growth and secondly, to develop a model that could be used to assess total length (L(T)) and mass (M)-at-age response to different temperature scenarios. The von Bertalanffy growth model was fitted on a cohort-by-cohort basis from 1970 to 2006. The asymptotic L(T) (L(∞)) was negatively correlated with temperature while the rate at which L(∞) is reached (K) was positively correlated with temperature. K was negatively correlated with density, whereas no effect on L(∞) was observed. These effects were incorporated into a von Bertalanffy model which was extended to include temperature and density as explanatory variables. Only the temperature variable was significant. Fitting the extended von Bertalanffy model revealed that L(∞) decreased while K increased with increasing temperature, resulting in up to a 40% loss of individual yield at older ages. The dramatic decline observed in the mean age at which 50% of the population becomes mature suggests that higher temperatures resulted in larger young M. aeglefinus that matured earlier and therefore reached a smaller maximum size. In a global warming context, the loss of individual yield observed at old ages is likely to reduce the fisheries yield for M. aeglefinus in the North Sea.

Original languageEnglish
Pages (from-to)1874-1889
Number of pages16
JournalJournal of Fish Biology
Volume78
Issue number7
Early online date28 Apr 2011
DOIs
Publication statusPublished - Jun 2011

Fingerprint

Melanogrammus aeglefinus
haddock
North Sea
warming
temperature
temperature effect
sea
global warming
fishery
growth models
fisheries

Keywords

  • climate change
  • density dependence
  • individual yield
  • modelling
  • temperature
  • von Bertalanffy

Cite this

Implications of a warming North Sea for the growth of haddock Melanogrammus aeglefinus. / Baudron, A R; Needle, C L; Marshall, C T.

In: Journal of Fish Biology, Vol. 78, No. 7, 06.2011, p. 1874-1889.

Research output: Contribution to journalArticle

@article{99a8c1f7ed154f28bbe15f917ba72164,
title = "Implications of a warming North Sea for the growth of haddock Melanogrammus aeglefinus",
abstract = "The present study aimed firstly, to test for a temperature effect on North Sea haddock Melanogrammus aeglefinus growth and secondly, to develop a model that could be used to assess total length (L(T)) and mass (M)-at-age response to different temperature scenarios. The von Bertalanffy growth model was fitted on a cohort-by-cohort basis from 1970 to 2006. The asymptotic L(T) (L(∞)) was negatively correlated with temperature while the rate at which L(∞) is reached (K) was positively correlated with temperature. K was negatively correlated with density, whereas no effect on L(∞) was observed. These effects were incorporated into a von Bertalanffy model which was extended to include temperature and density as explanatory variables. Only the temperature variable was significant. Fitting the extended von Bertalanffy model revealed that L(∞) decreased while K increased with increasing temperature, resulting in up to a 40{\%} loss of individual yield at older ages. The dramatic decline observed in the mean age at which 50{\%} of the population becomes mature suggests that higher temperatures resulted in larger young M. aeglefinus that matured earlier and therefore reached a smaller maximum size. In a global warming context, the loss of individual yield observed at old ages is likely to reduce the fisheries yield for M. aeglefinus in the North Sea.",
keywords = "climate change, density dependence, individual yield, modelling, temperature, von Bertalanffy",
author = "Baudron, {A R} and Needle, {C L} and Marshall, {C T}",
note = "Journal of Fish Biology {\circledC} 2011 The Fisheries Society of the British Isles. No claim to original US government works.",
year = "2011",
month = "6",
doi = "10.1111/j.1095-8649.2011.02940.x",
language = "English",
volume = "78",
pages = "1874--1889",
journal = "Journal of Fish Biology",
issn = "0022-1112",
publisher = "Wiley-Blackwell",
number = "7",

}

TY - JOUR

T1 - Implications of a warming North Sea for the growth of haddock Melanogrammus aeglefinus

AU - Baudron, A R

AU - Needle, C L

AU - Marshall, C T

N1 - Journal of Fish Biology © 2011 The Fisheries Society of the British Isles. No claim to original US government works.

PY - 2011/6

Y1 - 2011/6

N2 - The present study aimed firstly, to test for a temperature effect on North Sea haddock Melanogrammus aeglefinus growth and secondly, to develop a model that could be used to assess total length (L(T)) and mass (M)-at-age response to different temperature scenarios. The von Bertalanffy growth model was fitted on a cohort-by-cohort basis from 1970 to 2006. The asymptotic L(T) (L(∞)) was negatively correlated with temperature while the rate at which L(∞) is reached (K) was positively correlated with temperature. K was negatively correlated with density, whereas no effect on L(∞) was observed. These effects were incorporated into a von Bertalanffy model which was extended to include temperature and density as explanatory variables. Only the temperature variable was significant. Fitting the extended von Bertalanffy model revealed that L(∞) decreased while K increased with increasing temperature, resulting in up to a 40% loss of individual yield at older ages. The dramatic decline observed in the mean age at which 50% of the population becomes mature suggests that higher temperatures resulted in larger young M. aeglefinus that matured earlier and therefore reached a smaller maximum size. In a global warming context, the loss of individual yield observed at old ages is likely to reduce the fisheries yield for M. aeglefinus in the North Sea.

AB - The present study aimed firstly, to test for a temperature effect on North Sea haddock Melanogrammus aeglefinus growth and secondly, to develop a model that could be used to assess total length (L(T)) and mass (M)-at-age response to different temperature scenarios. The von Bertalanffy growth model was fitted on a cohort-by-cohort basis from 1970 to 2006. The asymptotic L(T) (L(∞)) was negatively correlated with temperature while the rate at which L(∞) is reached (K) was positively correlated with temperature. K was negatively correlated with density, whereas no effect on L(∞) was observed. These effects were incorporated into a von Bertalanffy model which was extended to include temperature and density as explanatory variables. Only the temperature variable was significant. Fitting the extended von Bertalanffy model revealed that L(∞) decreased while K increased with increasing temperature, resulting in up to a 40% loss of individual yield at older ages. The dramatic decline observed in the mean age at which 50% of the population becomes mature suggests that higher temperatures resulted in larger young M. aeglefinus that matured earlier and therefore reached a smaller maximum size. In a global warming context, the loss of individual yield observed at old ages is likely to reduce the fisheries yield for M. aeglefinus in the North Sea.

KW - climate change

KW - density dependence

KW - individual yield

KW - modelling

KW - temperature

KW - von Bertalanffy

U2 - 10.1111/j.1095-8649.2011.02940.x

DO - 10.1111/j.1095-8649.2011.02940.x

M3 - Article

VL - 78

SP - 1874

EP - 1889

JO - Journal of Fish Biology

JF - Journal of Fish Biology

SN - 0022-1112

IS - 7

ER -