Growth changes in plaice, cod, haddock and saithe in the North Sea: a comparison of (post-)medieval and present-day growth rates based on otolith measurements
Fishing effort has strongly increased in the North Sea since the mid-19th century, causing a substantial reduction in the population size of exploited fish stocks. As fisheries research has developed simultaneously with the industrialisation of the fisheries, our knowledge of population dynamics at...
Main Authors: | , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier science bv
2004
|
Subjects: | |
Online Access: | https://lirias.kuleuven.be/handle/123456789/61064 http://gateway.newisiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=CCC&SrcApp=PRODUCT_NAME&SrcURL=WOS_RETURN_URL&CKEY=BOLL0313040051JL&DestLinkType=FullRecord&DestApp=CCC&SrcDesc=RETURN_ALT_TEXT&SrcAppSID=APP_SID |
id |
ftunivleuven:oai:lirias.kuleuven.be:123456789/61064 |
---|---|
record_format |
openpolar |
spelling |
ftunivleuven:oai:lirias.kuleuven.be:123456789/61064 2023-05-15T16:19:23+02:00 Growth changes in plaice, cod, haddock and saithe in the North Sea: a comparison of (post-)medieval and present-day growth rates based on otolith measurements Bolle, LJ Rijnsdorp, AD Van Neer, Willem Millner, RS van Leeuwen, PI Ervynck, A Ayers, R Ongenae, E 2004-05 https://lirias.kuleuven.be/handle/123456789/61064 http://gateway.newisiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=CCC&SrcApp=PRODUCT_NAME&SrcURL=WOS_RETURN_URL&CKEY=BOLL0313040051JL&DestLinkType=FullRecord&DestApp=CCC&SrcDesc=RETURN_ALT_TEXT&SrcAppSID=APP_SID en eng Elsevier science bv Journal of sea research vol:51 issue:3-4 pages:313-328 https://lirias.kuleuven.be/handle/123456789/61064 1385-1101 http://gateway.newisiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=CCC&SrcApp=PRODUCT_NAME&SrcURL=WOS_RETURN_URL&CKEY=BOLL0313040051JL&DestLinkType=FullRecord&DestApp=CCC&SrcDesc=RETURN_ALT_TEXT&SrcAppSID=APP_SID pleuronectes platessa gadus morhua melanogrammus aeglefinus pollachius virens otoliths back-calculation archaeological excavations density-dependent growth concentration hypothesis pleuronectes-platessa l size-selective mortality length-at-age dutch wadden sea solea-solea l juvenile growth reaction norms density Description (Metadata) only IT article 2004 ftunivleuven 2015-12-22T15:09:57Z Fishing effort has strongly increased in the North Sea since the mid-19th century, causing a substantial reduction in the population size of exploited fish stocks. As fisheries research has developed simultaneously with the industrialisation of the fisheries, our knowledge of population dynamics at low levels of exploitations is limited. Otoliths retrieved from archaeological excavations offer a unique opportunity to study growth rates in the past. This study compares historical and present-day growth rates for four commercially important demersal fish species. A total of 2532 modem otoliths (AD 1984-1999) and 1286 historical otoliths (AD 1200-1925) obtained from archaeological excavations in Belgium and Scotland were analysed. Comparison of the growth patterns between eras revealed a major increase in growth rate of haddock, whereas growth changes were not observed in saithe and only in the smaller size classes of plaice and cod. Comparison of our results with literature data indicates that the observed growth rate changes in plaice and cod occurred within the 20th century. Apparently the onset of industrialised fisheries has not greatly affected the growth of plaice, cod and saithe populations in the North Sea. This result contradicts the expectation of density-dependent limitation of growth during the era of pre-industrialised fishing, but is in agreement with the concentration hypothesis of Beverton (Neth. J. Sea Res. 34 (1995) 1) stating that species which concentrate spatially into nursery grounds during their early life-history may 'saturate' the carrying capacity of the juvenile habitat even though the adult part of the population is not limited by the adult habitat. (C) 2004 Elsevier B.V. All rights reserved. status: published Article in Journal/Newspaper Gadus morhua KU Leuven: Lirias |
institution |
Open Polar |
collection |
KU Leuven: Lirias |
op_collection_id |
ftunivleuven |
language |
English |
topic |
pleuronectes platessa gadus morhua melanogrammus aeglefinus pollachius virens otoliths back-calculation archaeological excavations density-dependent growth concentration hypothesis pleuronectes-platessa l size-selective mortality length-at-age dutch wadden sea solea-solea l juvenile growth reaction norms density |
spellingShingle |
pleuronectes platessa gadus morhua melanogrammus aeglefinus pollachius virens otoliths back-calculation archaeological excavations density-dependent growth concentration hypothesis pleuronectes-platessa l size-selective mortality length-at-age dutch wadden sea solea-solea l juvenile growth reaction norms density Bolle, LJ Rijnsdorp, AD Van Neer, Willem Millner, RS van Leeuwen, PI Ervynck, A Ayers, R Ongenae, E Growth changes in plaice, cod, haddock and saithe in the North Sea: a comparison of (post-)medieval and present-day growth rates based on otolith measurements |
topic_facet |
pleuronectes platessa gadus morhua melanogrammus aeglefinus pollachius virens otoliths back-calculation archaeological excavations density-dependent growth concentration hypothesis pleuronectes-platessa l size-selective mortality length-at-age dutch wadden sea solea-solea l juvenile growth reaction norms density |
description |
Fishing effort has strongly increased in the North Sea since the mid-19th century, causing a substantial reduction in the population size of exploited fish stocks. As fisheries research has developed simultaneously with the industrialisation of the fisheries, our knowledge of population dynamics at low levels of exploitations is limited. Otoliths retrieved from archaeological excavations offer a unique opportunity to study growth rates in the past. This study compares historical and present-day growth rates for four commercially important demersal fish species. A total of 2532 modem otoliths (AD 1984-1999) and 1286 historical otoliths (AD 1200-1925) obtained from archaeological excavations in Belgium and Scotland were analysed. Comparison of the growth patterns between eras revealed a major increase in growth rate of haddock, whereas growth changes were not observed in saithe and only in the smaller size classes of plaice and cod. Comparison of our results with literature data indicates that the observed growth rate changes in plaice and cod occurred within the 20th century. Apparently the onset of industrialised fisheries has not greatly affected the growth of plaice, cod and saithe populations in the North Sea. This result contradicts the expectation of density-dependent limitation of growth during the era of pre-industrialised fishing, but is in agreement with the concentration hypothesis of Beverton (Neth. J. Sea Res. 34 (1995) 1) stating that species which concentrate spatially into nursery grounds during their early life-history may 'saturate' the carrying capacity of the juvenile habitat even though the adult part of the population is not limited by the adult habitat. (C) 2004 Elsevier B.V. All rights reserved. status: published |
format |
Article in Journal/Newspaper |
author |
Bolle, LJ Rijnsdorp, AD Van Neer, Willem Millner, RS van Leeuwen, PI Ervynck, A Ayers, R Ongenae, E |
author_facet |
Bolle, LJ Rijnsdorp, AD Van Neer, Willem Millner, RS van Leeuwen, PI Ervynck, A Ayers, R Ongenae, E |
author_sort |
Bolle, LJ |
title |
Growth changes in plaice, cod, haddock and saithe in the North Sea: a comparison of (post-)medieval and present-day growth rates based on otolith measurements |
title_short |
Growth changes in plaice, cod, haddock and saithe in the North Sea: a comparison of (post-)medieval and present-day growth rates based on otolith measurements |
title_full |
Growth changes in plaice, cod, haddock and saithe in the North Sea: a comparison of (post-)medieval and present-day growth rates based on otolith measurements |
title_fullStr |
Growth changes in plaice, cod, haddock and saithe in the North Sea: a comparison of (post-)medieval and present-day growth rates based on otolith measurements |
title_full_unstemmed |
Growth changes in plaice, cod, haddock and saithe in the North Sea: a comparison of (post-)medieval and present-day growth rates based on otolith measurements |
title_sort |
growth changes in plaice, cod, haddock and saithe in the north sea: a comparison of (post-)medieval and present-day growth rates based on otolith measurements |
publisher |
Elsevier science bv |
publishDate |
2004 |
url |
https://lirias.kuleuven.be/handle/123456789/61064 http://gateway.newisiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=CCC&SrcApp=PRODUCT_NAME&SrcURL=WOS_RETURN_URL&CKEY=BOLL0313040051JL&DestLinkType=FullRecord&DestApp=CCC&SrcDesc=RETURN_ALT_TEXT&SrcAppSID=APP_SID |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_relation |
Journal of sea research vol:51 issue:3-4 pages:313-328 https://lirias.kuleuven.be/handle/123456789/61064 1385-1101 http://gateway.newisiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=CCC&SrcApp=PRODUCT_NAME&SrcURL=WOS_RETURN_URL&CKEY=BOLL0313040051JL&DestLinkType=FullRecord&DestApp=CCC&SrcDesc=RETURN_ALT_TEXT&SrcAppSID=APP_SID |
_version_ |
1766005773258719232 |