Reproductive ecology of the circumpolar Antarctic nemertean Parborlasia corrugatus: No evidence for inter-annual variation
Waters around the Antarctic Peninsula are experiencing one of the fastest rates of warming seen anywhere on Earth in the sea in recent times. Species inhabiting nearshore seabed sites in Antarctica have a long history in near freezing temperatures and have poor physiological capacities to cope with...
Published in: | Journal of Experimental Marine Biology and Ecology |
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2011
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ftsouthampton:oai:eprints.soton.ac.uk:191689 2023-07-30T03:57:40+02:00 Reproductive ecology of the circumpolar Antarctic nemertean Parborlasia corrugatus: No evidence for inter-annual variation Grange, L.J. Peck, Lloyd S. Tyler, Paul A. 2011-07-31 https://eprints.soton.ac.uk/191689/ unknown Grange, L.J., Peck, Lloyd S. and Tyler, Paul A. (2011) Reproductive ecology of the circumpolar Antarctic nemertean Parborlasia corrugatus: No evidence for inter-annual variation. Journal of Experimental Marine Biology and Ecology, 404 (1-2), 98-107. (doi:10.1016/j.jembe.2011.04.011 <http://dx.doi.org/10.1016/j.jembe.2011.04.011>). Article PeerReviewed 2011 ftsouthampton https://doi.org/10.1016/j.jembe.2011.04.011 2023-07-09T21:22:49Z Waters around the Antarctic Peninsula are experiencing one of the fastest rates of warming seen anywhere on Earth in the sea in recent times. Species inhabiting nearshore seabed sites in Antarctica have a long history in near freezing temperatures and have poor physiological capacities to cope with change. Reproductive success is a vital characteristic in species survival and evaluation of how reproductive processes vary with time is key to identifying vulnerable species and evaluating the effects of ocean warming. The long-term gametogenic development of the nemertean Parborlasia corrugatus (McIntosh, 1876) was analysed from monthly samples collected between July 1997 and November 2000 from a shallow water site adjacent to the British Antarctic Survey Rothera Research Station (Western Antarctic Peninsula). Spermatogenesis, oocyte size and reproductive condition are described for each month using histological and image analysis techniques. Male and female reproductive condition varied seasonally, with a reduction in the proportion of large oocytes and mature sperm in the gonad during the late austral summer (December–March). We identify three key characteristics in the reproductive ecology of P. corrugatus (1) the timing of reproduction was consistent in the late austral summer of each year and synchronous between males and females (2) oogenesis progressed over a discrete 15–16 month period with a single generation of oocytes in the ovary during most stages of gametogenic development and (3) notable differences in reproductive condition were not apparent from year to year. The majority of long-term studies on reproductive ecology of marine invertebrates at high latitudes, with the exception of one or two species, revealed that 18–24 months are required for gametogenesis compared to 6–12 months in temperate species and there is extreme inter-annual variation in reproductive output. P. corrugatus differs from this in requiring only 15 months for gametogenesis, and has little or no variation between years. This may ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica British Antarctic Survey University of Southampton: e-Prints Soton Antarctic Antarctic Peninsula Austral McIntosh ENVELOPE(168.683,168.683,-77.517,-77.517) Rothera ENVELOPE(-68.130,-68.130,-67.568,-67.568) Rothera Research Station ENVELOPE(-68.129,-68.129,-67.566,-67.566) The Antarctic Journal of Experimental Marine Biology and Ecology 404 1-2 98 107 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
Waters around the Antarctic Peninsula are experiencing one of the fastest rates of warming seen anywhere on Earth in the sea in recent times. Species inhabiting nearshore seabed sites in Antarctica have a long history in near freezing temperatures and have poor physiological capacities to cope with change. Reproductive success is a vital characteristic in species survival and evaluation of how reproductive processes vary with time is key to identifying vulnerable species and evaluating the effects of ocean warming. The long-term gametogenic development of the nemertean Parborlasia corrugatus (McIntosh, 1876) was analysed from monthly samples collected between July 1997 and November 2000 from a shallow water site adjacent to the British Antarctic Survey Rothera Research Station (Western Antarctic Peninsula). Spermatogenesis, oocyte size and reproductive condition are described for each month using histological and image analysis techniques. Male and female reproductive condition varied seasonally, with a reduction in the proportion of large oocytes and mature sperm in the gonad during the late austral summer (December–March). We identify three key characteristics in the reproductive ecology of P. corrugatus (1) the timing of reproduction was consistent in the late austral summer of each year and synchronous between males and females (2) oogenesis progressed over a discrete 15–16 month period with a single generation of oocytes in the ovary during most stages of gametogenic development and (3) notable differences in reproductive condition were not apparent from year to year. The majority of long-term studies on reproductive ecology of marine invertebrates at high latitudes, with the exception of one or two species, revealed that 18–24 months are required for gametogenesis compared to 6–12 months in temperate species and there is extreme inter-annual variation in reproductive output. P. corrugatus differs from this in requiring only 15 months for gametogenesis, and has little or no variation between years. This may ... |
format |
Article in Journal/Newspaper |
author |
Grange, L.J. Peck, Lloyd S. Tyler, Paul A. |
spellingShingle |
Grange, L.J. Peck, Lloyd S. Tyler, Paul A. Reproductive ecology of the circumpolar Antarctic nemertean Parborlasia corrugatus: No evidence for inter-annual variation |
author_facet |
Grange, L.J. Peck, Lloyd S. Tyler, Paul A. |
author_sort |
Grange, L.J. |
title |
Reproductive ecology of the circumpolar Antarctic nemertean Parborlasia corrugatus: No evidence for inter-annual variation |
title_short |
Reproductive ecology of the circumpolar Antarctic nemertean Parborlasia corrugatus: No evidence for inter-annual variation |
title_full |
Reproductive ecology of the circumpolar Antarctic nemertean Parborlasia corrugatus: No evidence for inter-annual variation |
title_fullStr |
Reproductive ecology of the circumpolar Antarctic nemertean Parborlasia corrugatus: No evidence for inter-annual variation |
title_full_unstemmed |
Reproductive ecology of the circumpolar Antarctic nemertean Parborlasia corrugatus: No evidence for inter-annual variation |
title_sort |
reproductive ecology of the circumpolar antarctic nemertean parborlasia corrugatus: no evidence for inter-annual variation |
publishDate |
2011 |
url |
https://eprints.soton.ac.uk/191689/ |
long_lat |
ENVELOPE(168.683,168.683,-77.517,-77.517) ENVELOPE(-68.130,-68.130,-67.568,-67.568) ENVELOPE(-68.129,-68.129,-67.566,-67.566) |
geographic |
Antarctic Antarctic Peninsula Austral McIntosh Rothera Rothera Research Station The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Austral McIntosh Rothera Rothera Research Station The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica British Antarctic Survey |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica British Antarctic Survey |
op_relation |
Grange, L.J., Peck, Lloyd S. and Tyler, Paul A. (2011) Reproductive ecology of the circumpolar Antarctic nemertean Parborlasia corrugatus: No evidence for inter-annual variation. Journal of Experimental Marine Biology and Ecology, 404 (1-2), 98-107. (doi:10.1016/j.jembe.2011.04.011 <http://dx.doi.org/10.1016/j.jembe.2011.04.011>). |
op_doi |
https://doi.org/10.1016/j.jembe.2011.04.011 |
container_title |
Journal of Experimental Marine Biology and Ecology |
container_volume |
404 |
container_issue |
1-2 |
container_start_page |
98 |
op_container_end_page |
107 |
_version_ |
1772818749093576704 |