The reproductive ecology of the Antarctic bivalve Aequiyoldia eightsii (Protobranchia: Sareptidae) follows neither Antarctic nor taxonomic patterns
The accepted paradigm for reproduction in Antarctic marine species is one where oogenesis takes 18 months to 2 years, and a bimodal egg-size distribution where two cohorts of eggs are present in female gonads throughout the year. These slow gametogenic traits are driven by low temperature and/or the...
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Online Access: | https://researchonline.jcu.edu.au/72770/1/72770.pdf |
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ftjamescook:oai:researchonline.jcu.edu.au:72770 2024-02-11T09:57:05+01:00 The reproductive ecology of the Antarctic bivalve Aequiyoldia eightsii (Protobranchia: Sareptidae) follows neither Antarctic nor taxonomic patterns Lau, Sally C.Y. Grange, Laura J. Peck, Lloyd S. Reed, Adam J. 2018 application/pdf https://researchonline.jcu.edu.au/72770/1/72770.pdf unknown Springer https://doi.org/10.1007/s00300-018-2309-2 https://researchonline.jcu.edu.au/72770/ https://researchonline.jcu.edu.au/72770/1/72770.pdf Lau, Sally C.Y., Grange, Laura J., Peck, Lloyd S., and Reed, Adam J. (2018) The reproductive ecology of the Antarctic bivalve Aequiyoldia eightsii (Protobranchia: Sareptidae) follows neither Antarctic nor taxonomic patterns. Polar Biology, 41. pp. 1693-1706. open Article PeerReviewed 2018 ftjamescook https://doi.org/10.1007/s00300-018-2309-2 2024-01-22T23:50:17Z The accepted paradigm for reproduction in Antarctic marine species is one where oogenesis takes 18 months to 2 years, and a bimodal egg-size distribution where two cohorts of eggs are present in female gonads throughout the year. These slow gametogenic traits are driven by low temperature and/or the restriction of resource availability because of extreme seasonality in the marine environment. Here we present data on the reproductive ecology of the common Antarctic bivalve Aequiyoldia eightsii (Jay, 1839) (Protobranchia: Sarepidae) from monthly samples collected between January 2013 and May 2014 at Hangar Cove, Rothera Point on the West Antarctic Peninsula. These data show that A. eightsii is unusual because it does not follow the typical pattern expected for reproduction in Antarctic marine invertebrates, and differs also from closely related nuculanid protobranch bivalves with respect to gametogenic duration and reproductive periodicity. Continuous oogenesis, evidenced by the year-round occurrence of previtellogenic, vitellogenic, and ripe oocytes in female gonads, is supplemented by a seasonal increase in reproductive intensity and spawning in Austral winter (April–May), evidenced by the loss of mature spermatozoa and ripe oocytes from males and females, respectively. The simultaneous occurrence of these contrasting traits in individuals is attributed to a flexible feeding strategy (suspension and deposit feeding) in response to seasonal changes in food supply characteristic of the Antarctic marine environment. Asynchrony between individual females is also notable. We hypothesise that the variability may represent a trade-off between somatic and reproductive growth, and previously reported internal interannual cycles in shell growth. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Polar Biology James Cook University, Australia: ResearchOnline@JCU Antarctic Antarctic Peninsula Austral Rothera ENVELOPE(-68.130,-68.130,-67.568,-67.568) Rothera Point ENVELOPE(-68.133,-68.133,-67.567,-67.567) The Antarctic Polar Biology 41 9 1693 1706 |
institution |
Open Polar |
collection |
James Cook University, Australia: ResearchOnline@JCU |
op_collection_id |
ftjamescook |
language |
unknown |
description |
The accepted paradigm for reproduction in Antarctic marine species is one where oogenesis takes 18 months to 2 years, and a bimodal egg-size distribution where two cohorts of eggs are present in female gonads throughout the year. These slow gametogenic traits are driven by low temperature and/or the restriction of resource availability because of extreme seasonality in the marine environment. Here we present data on the reproductive ecology of the common Antarctic bivalve Aequiyoldia eightsii (Jay, 1839) (Protobranchia: Sarepidae) from monthly samples collected between January 2013 and May 2014 at Hangar Cove, Rothera Point on the West Antarctic Peninsula. These data show that A. eightsii is unusual because it does not follow the typical pattern expected for reproduction in Antarctic marine invertebrates, and differs also from closely related nuculanid protobranch bivalves with respect to gametogenic duration and reproductive periodicity. Continuous oogenesis, evidenced by the year-round occurrence of previtellogenic, vitellogenic, and ripe oocytes in female gonads, is supplemented by a seasonal increase in reproductive intensity and spawning in Austral winter (April–May), evidenced by the loss of mature spermatozoa and ripe oocytes from males and females, respectively. The simultaneous occurrence of these contrasting traits in individuals is attributed to a flexible feeding strategy (suspension and deposit feeding) in response to seasonal changes in food supply characteristic of the Antarctic marine environment. Asynchrony between individual females is also notable. We hypothesise that the variability may represent a trade-off between somatic and reproductive growth, and previously reported internal interannual cycles in shell growth. |
format |
Article in Journal/Newspaper |
author |
Lau, Sally C.Y. Grange, Laura J. Peck, Lloyd S. Reed, Adam J. |
spellingShingle |
Lau, Sally C.Y. Grange, Laura J. Peck, Lloyd S. Reed, Adam J. The reproductive ecology of the Antarctic bivalve Aequiyoldia eightsii (Protobranchia: Sareptidae) follows neither Antarctic nor taxonomic patterns |
author_facet |
Lau, Sally C.Y. Grange, Laura J. Peck, Lloyd S. Reed, Adam J. |
author_sort |
Lau, Sally C.Y. |
title |
The reproductive ecology of the Antarctic bivalve Aequiyoldia eightsii (Protobranchia: Sareptidae) follows neither Antarctic nor taxonomic patterns |
title_short |
The reproductive ecology of the Antarctic bivalve Aequiyoldia eightsii (Protobranchia: Sareptidae) follows neither Antarctic nor taxonomic patterns |
title_full |
The reproductive ecology of the Antarctic bivalve Aequiyoldia eightsii (Protobranchia: Sareptidae) follows neither Antarctic nor taxonomic patterns |
title_fullStr |
The reproductive ecology of the Antarctic bivalve Aequiyoldia eightsii (Protobranchia: Sareptidae) follows neither Antarctic nor taxonomic patterns |
title_full_unstemmed |
The reproductive ecology of the Antarctic bivalve Aequiyoldia eightsii (Protobranchia: Sareptidae) follows neither Antarctic nor taxonomic patterns |
title_sort |
reproductive ecology of the antarctic bivalve aequiyoldia eightsii (protobranchia: sareptidae) follows neither antarctic nor taxonomic patterns |
publisher |
Springer |
publishDate |
2018 |
url |
https://researchonline.jcu.edu.au/72770/1/72770.pdf |
long_lat |
ENVELOPE(-68.130,-68.130,-67.568,-67.568) ENVELOPE(-68.133,-68.133,-67.567,-67.567) |
geographic |
Antarctic Antarctic Peninsula Austral Rothera Rothera Point The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Austral Rothera Rothera Point The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Polar Biology |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Polar Biology |
op_relation |
https://doi.org/10.1007/s00300-018-2309-2 https://researchonline.jcu.edu.au/72770/ https://researchonline.jcu.edu.au/72770/1/72770.pdf Lau, Sally C.Y., Grange, Laura J., Peck, Lloyd S., and Reed, Adam J. (2018) The reproductive ecology of the Antarctic bivalve Aequiyoldia eightsii (Protobranchia: Sareptidae) follows neither Antarctic nor taxonomic patterns. Polar Biology, 41. pp. 1693-1706. |
op_rights |
open |
op_doi |
https://doi.org/10.1007/s00300-018-2309-2 |
container_title |
Polar Biology |
container_volume |
41 |
container_issue |
9 |
container_start_page |
1693 |
op_container_end_page |
1706 |
_version_ |
1790608467271090176 |