Seasonal Variation in the Offspring Development of Onchidoris Bilamellata (Gastropoda: Nudibranchia)
The spawning period of the nudibranch mollusc Onchidoris bilamellata (L.), although generally extending from December to May, has occasionally been reported to occur also in summer and early autumn. Preliminary data are presented here on the larval development of summer and early autumn spawnings an...
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Cambridge University Press (CUP)
1996
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Online Access: | http://dx.doi.org/10.1017/s0025315400029209 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400029209 |
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crcambridgeupr:10.1017/s0025315400029209 2024-03-03T08:45:03+00:00 Seasonal Variation in the Offspring Development of Onchidoris Bilamellata (Gastropoda: Nudibranchia) Lafuente, Isabel 1996 http://dx.doi.org/10.1017/s0025315400029209 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400029209 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 76, issue 1, page 243-246 ISSN 0025-3154 1469-7769 Aquatic Science journal-article 1996 crcambridgeupr https://doi.org/10.1017/s0025315400029209 2024-02-08T08:43:30Z The spawning period of the nudibranch mollusc Onchidoris bilamellata (L.), although generally extending from December to May, has occasionally been reported to occur also in summer and early autumn. Preliminary data are presented here on the larval development of summer and early autumn spawnings and compared to previous studies of the larval development of ‘normal’ (winter-spring) spawnings. The possible causes and consequences of the rare summer and early autumn spawnings are discussed. The nudibranch mollusc Onchidoris bilamellata is distributed around the British Isles, the Atlantic coast of France, Iceland, Greenland, and the coasts of North America and Japan (Thompson & Brown, 1976). It exhibits an annual life cycle with a single spawning season, generally extending from December to May in which the adults spawn repeatedly. At the end of May/June the post-spawning mortality of the adults is usually complete (Todd, 1979). Summer and early autumn spawnings have been recorded in intertidal populations only occasionally (Todd, 1979 and references therein; present study). Larval development has been studied previously on larvae hatching from eggs laid during the ‘normal’ spawning season. No information is available on the larval growth and development of summer and early autumn spawnings. In the present study two key points were addressed: the occurrence of individuals and spawn masses in the field throughout the year; and the identification of any distinctive traits of the July and September offspring. The field observations were carried out on the south-eastern coast of Scotland (56°18′N 2°39′W) from July 1993 to August 1994. The surface sea-water temperatures were recorded from January 1993 to August 1994 in St Andrews (56°20′N 2°47′W), seven miles from the location under study (Figure 1). Article in Journal/Newspaper Greenland Iceland Cambridge University Press Greenland Todd ENVELOPE(-85.933,-85.933,-78.050,-78.050) Journal of the Marine Biological Association of the United Kingdom 76 1 243 246 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science Lafuente, Isabel Seasonal Variation in the Offspring Development of Onchidoris Bilamellata (Gastropoda: Nudibranchia) |
topic_facet |
Aquatic Science |
description |
The spawning period of the nudibranch mollusc Onchidoris bilamellata (L.), although generally extending from December to May, has occasionally been reported to occur also in summer and early autumn. Preliminary data are presented here on the larval development of summer and early autumn spawnings and compared to previous studies of the larval development of ‘normal’ (winter-spring) spawnings. The possible causes and consequences of the rare summer and early autumn spawnings are discussed. The nudibranch mollusc Onchidoris bilamellata is distributed around the British Isles, the Atlantic coast of France, Iceland, Greenland, and the coasts of North America and Japan (Thompson & Brown, 1976). It exhibits an annual life cycle with a single spawning season, generally extending from December to May in which the adults spawn repeatedly. At the end of May/June the post-spawning mortality of the adults is usually complete (Todd, 1979). Summer and early autumn spawnings have been recorded in intertidal populations only occasionally (Todd, 1979 and references therein; present study). Larval development has been studied previously on larvae hatching from eggs laid during the ‘normal’ spawning season. No information is available on the larval growth and development of summer and early autumn spawnings. In the present study two key points were addressed: the occurrence of individuals and spawn masses in the field throughout the year; and the identification of any distinctive traits of the July and September offspring. The field observations were carried out on the south-eastern coast of Scotland (56°18′N 2°39′W) from July 1993 to August 1994. The surface sea-water temperatures were recorded from January 1993 to August 1994 in St Andrews (56°20′N 2°47′W), seven miles from the location under study (Figure 1). |
format |
Article in Journal/Newspaper |
author |
Lafuente, Isabel |
author_facet |
Lafuente, Isabel |
author_sort |
Lafuente, Isabel |
title |
Seasonal Variation in the Offspring Development of Onchidoris Bilamellata (Gastropoda: Nudibranchia) |
title_short |
Seasonal Variation in the Offspring Development of Onchidoris Bilamellata (Gastropoda: Nudibranchia) |
title_full |
Seasonal Variation in the Offspring Development of Onchidoris Bilamellata (Gastropoda: Nudibranchia) |
title_fullStr |
Seasonal Variation in the Offspring Development of Onchidoris Bilamellata (Gastropoda: Nudibranchia) |
title_full_unstemmed |
Seasonal Variation in the Offspring Development of Onchidoris Bilamellata (Gastropoda: Nudibranchia) |
title_sort |
seasonal variation in the offspring development of onchidoris bilamellata (gastropoda: nudibranchia) |
publisher |
Cambridge University Press (CUP) |
publishDate |
1996 |
url |
http://dx.doi.org/10.1017/s0025315400029209 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400029209 |
long_lat |
ENVELOPE(-85.933,-85.933,-78.050,-78.050) |
geographic |
Greenland Todd |
geographic_facet |
Greenland Todd |
genre |
Greenland Iceland |
genre_facet |
Greenland Iceland |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 76, issue 1, page 243-246 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315400029209 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
76 |
container_issue |
1 |
container_start_page |
243 |
op_container_end_page |
246 |
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1792500570150404096 |