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Growth and reproduction in the Antarctic brooding bivalve Adacnarca nitens (Philobryidae) from the Ross Sea
Higgs, N.D.; Reed, A.J.; Hooke, R.; Honey, D.J.; Heilmayer, O.; Thatje, S. (2009). Growth and reproduction in the Antarctic brooding bivalve Adacnarca nitens (Philobryidae) from the Ross Sea. Mar. Biol. (Berl.) 156(5): 1073-1081. http://dx.doi.org/10.1007/s00227-009-1154-9
In: Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793, meer
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| Auteurs | | Top |
- Higgs, N.D., meer
- Reed, A.J.
- Hooke, R.
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- Honey, D.J.
- Heilmayer, O.
- Thatje, S.
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| Abstract |
We present information on the reproductive biology, population structure, and growth of the brooding Antarctic bivalve Adacnarca nitens Pelseneer 1903, from the Ross Sea, Antarctica. Individuals ranging from 0.85 to 6.00 mm were found attached to a hydrozoan colony. This species shows low fecundity and large egg size, common to other brooding species. The minimum size at which oogenesis was detected was 2.3 mm and the minimum size at which brooding was evident was 3.9 mm. Embryos of a full range of developmental stages were brooded simultaneously in females. The population showed a log–normal distribution and results suggest non-periodic reproduction with continuous embryonic development. The reproductive traits of A. nitens are discussed in the context of circum-Antarctic species distribution and limitations to dispersal in brooding benthic invertebrates. |
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