Bomb dating and age determination of skates (family Rajidae) off the eastern coast of Canada
Abstract McPhie, R. P., and Campana, S. E. 2009. Bomb dating and age determination of skates (family Rajidae) off the eastern coast of Canada. – ICES Journal of Marine Science, 66: 546–560. Recent declines in abundance of skates off the eastern coast of Canada have heightened the need for validated...
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Oxford University Press (OUP)
2009
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsp002 http://academic.oup.com/icesjms/article-pdf/66/3/546/29132292/fsp002.pdf |
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croxfordunivpr:10.1093/icesjms/fsp002 2023-12-31T10:21:20+01:00 Bomb dating and age determination of skates (family Rajidae) off the eastern coast of Canada McPhie, Romney P. Campana, Steven E. 2009 http://dx.doi.org/10.1093/icesjms/fsp002 http://academic.oup.com/icesjms/article-pdf/66/3/546/29132292/fsp002.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 66, issue 3, page 546-560 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2009 croxfordunivpr https://doi.org/10.1093/icesjms/fsp002 2023-12-06T08:48:38Z Abstract McPhie, R. P., and Campana, S. E. 2009. Bomb dating and age determination of skates (family Rajidae) off the eastern coast of Canada. – ICES Journal of Marine Science, 66: 546–560. Recent declines in abundance of skates off the eastern coast of Canada have heightened the need for validated age and growth estimates in the region. In all, 502 winter (Leucoraja ocellata), little (Leucoraja erinacea), thorny (Amblyraja radiata), and smooth (Malacoraja senta) skate vertebral centra collected seasonally between 1999 and 2004 were sectioned using a mass processing method, then used to reconstruct growth in each species. Bomb radiocarbon (Δ14C) analysis was used to provide evidence of annual band-pair deposition in thorny skates. Estimates of L∞ from traditional von Bertalanffy growth models (VBGM) ranged from 60.6 cm (little skate) to 89.7 cm (thorny skate), and K estimates from 0.07 (thorny skate) to 0.19 (little skate). A modified two-parameter VBGM (Lmax = 94.1 cm) fitted to winter skate length-at-age data yielded a value of K of 0.15. Maximum observed ages ranged from 12 (little skate) to 19 years in both winter and thorny skates. The year-specific incorporation of Δ14C milled from thorny and winter skate vertebral sections closely resembled shark-derived reference chronology values from the Northwest Atlantic. Pre-bomb Δ14C in a thorny skate collected in 1988 and aged at 23 years appeared to validate age interpretations and suggested that thorny skate reach an absolute age of at least 28 years, the oldest validated age reported for any species of batoid. Article in Journal/Newspaper Northwest Atlantic Oxford University Press (via Crossref) ICES Journal of Marine Science 66 3 546 560 |
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Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography McPhie, Romney P. Campana, Steven E. Bomb dating and age determination of skates (family Rajidae) off the eastern coast of Canada |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract McPhie, R. P., and Campana, S. E. 2009. Bomb dating and age determination of skates (family Rajidae) off the eastern coast of Canada. – ICES Journal of Marine Science, 66: 546–560. Recent declines in abundance of skates off the eastern coast of Canada have heightened the need for validated age and growth estimates in the region. In all, 502 winter (Leucoraja ocellata), little (Leucoraja erinacea), thorny (Amblyraja radiata), and smooth (Malacoraja senta) skate vertebral centra collected seasonally between 1999 and 2004 were sectioned using a mass processing method, then used to reconstruct growth in each species. Bomb radiocarbon (Δ14C) analysis was used to provide evidence of annual band-pair deposition in thorny skates. Estimates of L∞ from traditional von Bertalanffy growth models (VBGM) ranged from 60.6 cm (little skate) to 89.7 cm (thorny skate), and K estimates from 0.07 (thorny skate) to 0.19 (little skate). A modified two-parameter VBGM (Lmax = 94.1 cm) fitted to winter skate length-at-age data yielded a value of K of 0.15. Maximum observed ages ranged from 12 (little skate) to 19 years in both winter and thorny skates. The year-specific incorporation of Δ14C milled from thorny and winter skate vertebral sections closely resembled shark-derived reference chronology values from the Northwest Atlantic. Pre-bomb Δ14C in a thorny skate collected in 1988 and aged at 23 years appeared to validate age interpretations and suggested that thorny skate reach an absolute age of at least 28 years, the oldest validated age reported for any species of batoid. |
format |
Article in Journal/Newspaper |
author |
McPhie, Romney P. Campana, Steven E. |
author_facet |
McPhie, Romney P. Campana, Steven E. |
author_sort |
McPhie, Romney P. |
title |
Bomb dating and age determination of skates (family Rajidae) off the eastern coast of Canada |
title_short |
Bomb dating and age determination of skates (family Rajidae) off the eastern coast of Canada |
title_full |
Bomb dating and age determination of skates (family Rajidae) off the eastern coast of Canada |
title_fullStr |
Bomb dating and age determination of skates (family Rajidae) off the eastern coast of Canada |
title_full_unstemmed |
Bomb dating and age determination of skates (family Rajidae) off the eastern coast of Canada |
title_sort |
bomb dating and age determination of skates (family rajidae) off the eastern coast of canada |
publisher |
Oxford University Press (OUP) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1093/icesjms/fsp002 http://academic.oup.com/icesjms/article-pdf/66/3/546/29132292/fsp002.pdf |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
ICES Journal of Marine Science volume 66, issue 3, page 546-560 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsp002 |
container_title |
ICES Journal of Marine Science |
container_volume |
66 |
container_issue |
3 |
container_start_page |
546 |
op_container_end_page |
560 |
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1786832069694849024 |