Sex ratios, intersexuality and sex change in copepods
Female-biased adult sex ratios are common in copepod species, and have been observed both in wild populations and in cultures. Biased sex ratios are most commonly explained by sex- or stage-specific differences in longevity or mortality. However, neither differential longevity nor differential morta...
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| Veröffentlicht in: | Journal of plankton research 2009-09, Vol.31 (9), p.1101-1117 |
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| container_title | Journal of plankton research |
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| creator | Gusmão, Luiz Felipe Mendes McKinnon, A. David |
| description | Female-biased adult sex ratios are common in copepod species, and have been observed both in wild populations and in cultures. Biased sex ratios are most commonly explained by sex- or stage-specific differences in longevity or mortality. However, neither differential longevity nor differential mortality fully explains skewed sex ratios in planktonic copepod populations. We propose that sex change is an important mechanism determining the adult sex ratio. Though sex change has been proposed for only a few copepod species, intersexuality is widespread. We review the occurrence and causation of intersexuality in planktonic copepods, which is a manifestation of late sex change during development. By way of example, we demonstrate that skewed sex ratios of Acrocalanus gracilis, a common tropical paracalanid copepod, could be explained by sex change alone. Our observations suggest that sex determination in copepods is under strong environmental control, and we argue that the food limitation is an important determinant of sex change. |
| doi_str_mv | 10.1093/plankt/fbp059 |
| format | Article |
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Our observations suggest that sex determination in copepods is under strong environmental control, and we argue that the food limitation is an important determinant of sex change.</description><identifier>ISSN: 0142-7873</identifier><identifier>EISSN: 1464-3774</identifier><identifier>DOI: 10.1093/plankt/fbp059</identifier><identifier>CODEN: JPLRD9</identifier><language>eng</language><publisher>Oxford: Oxford University Press</publisher><subject>Acrocalanus gracilis ; Animal and plant ecology ; Animal, plant and microbial ecology ; Aquatic crustaceans ; Biological and medical sciences ; Copepoda ; Crustacea ; Fundamental and applied biological sciences. Psychology ; General aspects ; Invertebrates ; Longevity ; Marine ; Mortality ; Plankton ; Ratios ; Sex ; Sex determination ; Sex ratio ; Synecology ; Tropical environment</subject><ispartof>Journal of plankton research, 2009-09, Vol.31 (9), p.1101-1117</ispartof><rights>The Author 2009. Published by Oxford University Press. 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Psychology</subject><subject>General aspects</subject><subject>Invertebrates</subject><subject>Longevity</subject><subject>Marine</subject><subject>Mortality</subject><subject>Plankton</subject><subject>Ratios</subject><subject>Sex</subject><subject>Sex determination</subject><subject>Sex ratio</subject><subject>Synecology</subject><subject>Tropical environment</subject><issn>0142-7873</issn><issn>1464-3774</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNqFkM1Lw0AQxRdRsFaP3oOgeDB2N_uVPWrRVhA8qFW8LJPNRlNjEncTaP97t6R48OJpGN5vHm8eQscEXxKs6KStoP7sJkXWYq520IgwwWIqJdtFI0xYEstU0n104P0SYyKCOkL80a4iB13Z-IuorDvrvF31UJXdOoI6j8IWmQ-o321QI9O0tm1yf4j2Cqi8PdrOMXq-vXmazuP7h9nd9Oo-NhyTLs45wxxEVhhhM1UQRmyqiAKQkHLOVc6oyCQjueJMcEE4BplAYQw3lGYFoWN0Nvi2rvnure_0V-mNrcKjtum9TrBUCU834MkfcNn0rg7ZdJLghGMuVIDiATKu8d7ZQreu_AK31gTrTYN6aFAPDQb-dGsK3kBVOKhN6X-PEpJiRiUP3PnANX37r-U2Quk7u_qFwX1qIYOXnr--6elC4pfZ4lpT-gN7_Y6I</recordid><startdate>20090901</startdate><enddate>20090901</enddate><creator>Gusmão, Luiz Felipe Mendes</creator><creator>McKinnon, A. 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Psychology</topic><topic>General aspects</topic><topic>Invertebrates</topic><topic>Longevity</topic><topic>Marine</topic><topic>Mortality</topic><topic>Plankton</topic><topic>Ratios</topic><topic>Sex</topic><topic>Sex determination</topic><topic>Sex ratio</topic><topic>Synecology</topic><topic>Tropical environment</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gusmão, Luiz Felipe Mendes</creatorcontrib><creatorcontrib>McKinnon, A. 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| identifier | ISSN: 0142-7873 |
| ispartof | Journal of plankton research, 2009-09, Vol.31 (9), p.1101-1117 |
| issn | 0142-7873 1464-3774 |
| language | eng |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Oxford University Press Journals All Titles (1996-Current); Alma/SFX Local Collection |
| subjects | Acrocalanus gracilis Animal and plant ecology Animal, plant and microbial ecology Aquatic crustaceans Biological and medical sciences Copepoda Crustacea Fundamental and applied biological sciences. Psychology General aspects Invertebrates Longevity Marine Mortality Plankton Ratios Sex Sex determination Sex ratio Synecology Tropical environment |
| title | Sex ratios, intersexuality and sex change in copepods |
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