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• W1979271907 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 290:179-191 (2005) - doi:10.3354/meps290179 Mating behaviour, female receptivity and male–male competition in the intertidal crab Hemigrapsus sexdentatus (Brachyura: Grapsidae) A. M. Brockerhoff*, C. L. McLay School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8020, New Zealand *Email: annette.brockerhoff@canterbury.ac.nz ABSTRACT: Female receptivity and male–male competition were studied in a laboratory population of the New Zealand rock crab Hemigrapsus sexdentatus. Mating only occurred in the few days prior to oviposition, when females had mobile gonopore opercula. After mating, males guarded females constantly and mated with them repeatedly until the females laid eggs. Isolated females remained receptive for significantly longer than females housed temporarily or constantly with males in the laboratory. The duration of female receptiveness can, therefore, vary in relation to the presence of males. Male–male competition was high with frequent attacks on pairs by other males. Large males mated significantly more often than medium and small males, and were more likely to take over a female from another male. However, large and small male H. sexdentatus both adjusted the ejaculate size according to the size of the female; i.e. transferred relatively large ejaculates to large females, and were equally able to transfer ejaculates to small and large females during the first mating in the season. Post-copulatory guarding reduced the risk of sperm competition. Although male–male competition appears to be the dominant factor in pair-formation, the ability of females to extend their receptivity in the absence of males, will have an impact on the operational sex ratio, and on the extent of male-male and sperm competition. KEY WORDS: Mating behaviour · Female receptivity · Sexual selection · Male competition · Sperm competition · Ejaculate size Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 290. Online publication date: April 13, 2005 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2005 Inter-Research." @default.
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• W1979271907 title "Mating behaviour, female receptivity and male–male competition in the intertidal crab Hemigrapsus sexdentatus (Brachyura: Grapsidae)" @default.
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• W1979271907 doi "https://doi.org/10.3354/meps290179" @default.
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