Egg development,hatching rhythm and moult patterns in <Emphasis Type="Italic">Paralomis spinosissima</Emphasis> (Decapoda: Anomura: Paguroidea: Lithodidae) from South Georgia waters (Southern Ocean) |
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Authors: | William D K Reid Jamie Watts Sarah Clarke Mark Belchier Sven Thatje |
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Institution: | (1) Biological Sciences Division, British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, CB3 OET Cambridge, UK;(2) National Oceanography Centre, Southampton, School of Ocean and Earth Science, University of Southampton, European Way, SO14 3ZH Southampton, UK |
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Abstract: | Larval release, hatching rhythms and moult patterns were examined in a captive population of the subantarctic lithodid, Paralomis spinosissima from the South Georgia and Shag Rocks region. Larvae hatched throughout the year with the majority of females starting to
release larvae at the end of the austral summer and beginning of autumn. Larval release continued over a period of up to 9 weeks
with high variability in the numbers that hatched each day. A similar seasonal pattern to hatching was evident in the moulting
of females. Intermoult period for two adult females (CL = 63 and 85 mm) ranged from 894 to 1,120 days while an intermoult
period for males was estimated to be in excess of 832 days. The results are consistent with other species of Paralomis and are discussed in relation to physiological and environmental adaptations to the cold-water conditions south of the Antarctic
Convergence. |
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Keywords: | Antarctica Crustacea Cold adaptation Stone crab King crab |
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