Sensitive skates or resilient rays? Spatial and temporal shifts in ray species composition in the central and north-western North Sea between 1930 and the present day
Historic and current survey data are compared to describe the changes occurring in abundance, species richness and length–frequency of the rajid community in the central and north-western North Sea between the periods 1929–1956 and 1981–1995. Survey data show that some species have decreased in abun...
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Oxford University Press
1998
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fthighwire:oai:open-archive.highwire.org:icesjms:55/3/392 2023-05-15T15:56:10+02:00 Sensitive skates or resilient rays? Spatial and temporal shifts in ray species composition in the central and north-western North Sea between 1930 and the present day Walker, P. A. Hislop, J. R. G. 1998-06-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/55/3/392 https://doi.org/10.1006/jmsc.1997.0325 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/55/3/392 http://dx.doi.org/10.1006/jmsc.1997.0325 Copyright (C) 1998, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 1998 fthighwire https://doi.org/10.1006/jmsc.1997.0325 2013-05-27T06:02:50Z Historic and current survey data are compared to describe the changes occurring in abundance, species richness and length–frequency of the rajid community in the central and north-western North Sea between the periods 1929–1956 and 1981–1995. Survey data show that some species have decreased in abundance (common skate and thornback ray), whilst others (starry ray) have increased. The length–frequency relationship is currently truncated at 70–79 cm, whilst individuals of up to and above 100 cm used to be common. Life-history characteristics show that the sensitivity of rays and skates to enhanced mortality is species specific. The sequence of the five most common species from most to least sensitive is: Raja batis (common skate) > R. clavata (thornback ray) > R. montagui (spotted ray) > R. naevus (cuckoo ray) > R. radiata (starry ray). This is also the order of commercial importance. The observed changes are discussed in relation to fishing. Text Common skate HighWire Press (Stanford University) ICES Journal of Marine Science 55 3 392 402 |
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HighWire Press (Stanford University) |
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language |
English |
topic |
Articles |
spellingShingle |
Articles Walker, P. A. Hislop, J. R. G. Sensitive skates or resilient rays? Spatial and temporal shifts in ray species composition in the central and north-western North Sea between 1930 and the present day |
topic_facet |
Articles |
description |
Historic and current survey data are compared to describe the changes occurring in abundance, species richness and length–frequency of the rajid community in the central and north-western North Sea between the periods 1929–1956 and 1981–1995. Survey data show that some species have decreased in abundance (common skate and thornback ray), whilst others (starry ray) have increased. The length–frequency relationship is currently truncated at 70–79 cm, whilst individuals of up to and above 100 cm used to be common. Life-history characteristics show that the sensitivity of rays and skates to enhanced mortality is species specific. The sequence of the five most common species from most to least sensitive is: Raja batis (common skate) > R. clavata (thornback ray) > R. montagui (spotted ray) > R. naevus (cuckoo ray) > R. radiata (starry ray). This is also the order of commercial importance. The observed changes are discussed in relation to fishing. |
format |
Text |
author |
Walker, P. A. Hislop, J. R. G. |
author_facet |
Walker, P. A. Hislop, J. R. G. |
author_sort |
Walker, P. A. |
title |
Sensitive skates or resilient rays? Spatial and temporal shifts in ray species composition in the central and north-western North Sea between 1930 and the present day |
title_short |
Sensitive skates or resilient rays? Spatial and temporal shifts in ray species composition in the central and north-western North Sea between 1930 and the present day |
title_full |
Sensitive skates or resilient rays? Spatial and temporal shifts in ray species composition in the central and north-western North Sea between 1930 and the present day |
title_fullStr |
Sensitive skates or resilient rays? Spatial and temporal shifts in ray species composition in the central and north-western North Sea between 1930 and the present day |
title_full_unstemmed |
Sensitive skates or resilient rays? Spatial and temporal shifts in ray species composition in the central and north-western North Sea between 1930 and the present day |
title_sort |
sensitive skates or resilient rays? spatial and temporal shifts in ray species composition in the central and north-western north sea between 1930 and the present day |
publisher |
Oxford University Press |
publishDate |
1998 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/55/3/392 https://doi.org/10.1006/jmsc.1997.0325 |
genre |
Common skate |
genre_facet |
Common skate |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/55/3/392 http://dx.doi.org/10.1006/jmsc.1997.0325 |
op_rights |
Copyright (C) 1998, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1006/jmsc.1997.0325 |
container_title |
ICES Journal of Marine Science |
container_volume |
55 |
container_issue |
3 |
container_start_page |
392 |
op_container_end_page |
402 |
_version_ |
1766391637776269312 |