Interpopulational differences in the female reproductive cycle of the southwestern Atlantic estuarine crab Chasmagnathus granulatus Dana, 1851 (Brachyura: Grapsoidea: Varunidae)
The female reproductive biology of Chasmagnathus granulatus Dana, a semiterrestrial burrowing crab endemic to the southwestern Atlantic, was compared in two contrasting coastal habitats: San Antonio (SA, marine) and Mar Chiquita (MC, estuarial). Mature females were collected monthly for 1.5...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2006-12-01
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| Series: | Scientia Marina |
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| Online Access: | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/77 |
| _version_ | 1818667731450331136 |
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| author | Romina B. Ituarte Claudia Bas Tomás A. Luppi Eduardo D. Spivak |
| author_facet | Romina B. Ituarte Claudia Bas Tomás A. Luppi Eduardo D. Spivak |
| author_sort | Romina B. Ituarte |
| collection | DOAJ |
| description | The female reproductive biology of Chasmagnathus granulatus Dana, a semiterrestrial burrowing crab endemic to the southwestern Atlantic, was compared in two contrasting coastal habitats: San Antonio (SA, marine) and Mar Chiquita (MC, estuarial). Mature females were collected monthly for 1.5 years and the ovarian cycle was described using a qualitative scale. Gonadosomatic (GSI) and hepatosomatic (HSI) indexes were calculated. The highest GSI and HSI occurred early in the reproductive season in SA and during the non-reproductive season in MC. The beginning and duration of the reproductive season also differed between populations: it started later and was shorter in SA. In MC, secondary vitellogenesis continued when the reproductive season had finished, and the ovaries remained fully developed throughout the non-reproductive season (winter). Therefore, females of MC were ready to lay eggs as soon as spring environmental conditions appeared. However, SA females did not attain a fully developed ovary during winter. A limited food supply would restrict the available energy to complete secondary vitellogenesis at the end of the reproductive season in SA, after the last spawning. Thus, the vitellogenic cycle should be completed in the following spring, causing a delay in the beginning of the reproductive period. In addition, the higher temperature amplitude may cause the reproductive period in SA to end early. |
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| format | Article |
| id | doaj.art-82857f6f37ee40abace8d5ec0f0438a4 |
| institution | Directory Open Access Journal |
| issn | 0214-8358 1886-8134 |
| language | English |
| last_indexed | 2024-12-17T06:25:05Z |
| publishDate | 2006-12-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Scientia Marina |
| spelling | doaj.art-82857f6f37ee40abace8d5ec0f0438a42022-12-21T22:00:19ZengConsejo Superior de Investigaciones CientíficasScientia Marina0214-83581886-81342006-12-0170470971810.3989/scimar.2006.70n470974Interpopulational differences in the female reproductive cycle of the southwestern Atlantic estuarine crab Chasmagnathus granulatus Dana, 1851 (Brachyura: Grapsoidea: Varunidae)Romina B. Ituarte0Claudia Bas1Tomás A. Luppi2Eduardo D. Spivak3Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad de Mar del Plata,Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad de Mar del Plata,Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad de Mar del Plata,Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad de Mar del PlataThe female reproductive biology of Chasmagnathus granulatus Dana, a semiterrestrial burrowing crab endemic to the southwestern Atlantic, was compared in two contrasting coastal habitats: San Antonio (SA, marine) and Mar Chiquita (MC, estuarial). Mature females were collected monthly for 1.5 years and the ovarian cycle was described using a qualitative scale. Gonadosomatic (GSI) and hepatosomatic (HSI) indexes were calculated. The highest GSI and HSI occurred early in the reproductive season in SA and during the non-reproductive season in MC. The beginning and duration of the reproductive season also differed between populations: it started later and was shorter in SA. In MC, secondary vitellogenesis continued when the reproductive season had finished, and the ovaries remained fully developed throughout the non-reproductive season (winter). Therefore, females of MC were ready to lay eggs as soon as spring environmental conditions appeared. However, SA females did not attain a fully developed ovary during winter. A limited food supply would restrict the available energy to complete secondary vitellogenesis at the end of the reproductive season in SA, after the last spawning. Thus, the vitellogenic cycle should be completed in the following spring, causing a delay in the beginning of the reproductive period. In addition, the higher temperature amplitude may cause the reproductive period in SA to end early.http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/77estuarycrabargentinaovarian cyclegonadosomatic indexhepatosomatic index |
| spellingShingle | Romina B. Ituarte Claudia Bas Tomás A. Luppi Eduardo D. Spivak Interpopulational differences in the female reproductive cycle of the southwestern Atlantic estuarine crab Chasmagnathus granulatus Dana, 1851 (Brachyura: Grapsoidea: Varunidae) Scientia Marina estuary crab argentina ovarian cycle gonadosomatic index hepatosomatic index |
| title | Interpopulational differences in the female reproductive cycle of the southwestern Atlantic estuarine crab Chasmagnathus granulatus Dana, 1851 (Brachyura: Grapsoidea: Varunidae) |
| title_full | Interpopulational differences in the female reproductive cycle of the southwestern Atlantic estuarine crab Chasmagnathus granulatus Dana, 1851 (Brachyura: Grapsoidea: Varunidae) |
| title_fullStr | Interpopulational differences in the female reproductive cycle of the southwestern Atlantic estuarine crab Chasmagnathus granulatus Dana, 1851 (Brachyura: Grapsoidea: Varunidae) |
| title_full_unstemmed | Interpopulational differences in the female reproductive cycle of the southwestern Atlantic estuarine crab Chasmagnathus granulatus Dana, 1851 (Brachyura: Grapsoidea: Varunidae) |
| title_short | Interpopulational differences in the female reproductive cycle of the southwestern Atlantic estuarine crab Chasmagnathus granulatus Dana, 1851 (Brachyura: Grapsoidea: Varunidae) |
| title_sort | interpopulational differences in the female reproductive cycle of the southwestern atlantic estuarine crab chasmagnathus granulatus dana 1851 brachyura grapsoidea varunidae |
| topic | estuary crab argentina ovarian cycle gonadosomatic index hepatosomatic index |
| url | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/77 |
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