Reproductive cycle of the mangrove oyster, Crassostrea rhizophorae (Bivalvia: Ostreidae) cultured in a macrotidal high-salinity zone on the Amazon mangrove coast of Brazil
ABSTRACT This study aimed to establish the reproductive cycle of the mangrove oyster, Crassostrea rhizophorae cultured in the macrotidal estuary of the Paciência River, Maranhão state, on the northeastern coast of Brazil, and its relationship with environmental factors. Oysters were collected monthl...
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| Format: | Article |
| Language: | English |
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Instituto Nacional de Pesquisas da Amazônia
2021-05-01
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| Series: | Acta Amazonica |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672021000200113&tlng=en |
| _version_ | 1819005320490385408 |
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| author | Ícaro ANTONIO Ana SOUSA Tiago LENZ Izabel FUNO Rodolf LOPES Marina FIGUEIREDO |
| author_facet | Ícaro ANTONIO Ana SOUSA Tiago LENZ Izabel FUNO Rodolf LOPES Marina FIGUEIREDO |
| author_sort | Ícaro ANTONIO |
| collection | DOAJ |
| description | ABSTRACT This study aimed to establish the reproductive cycle of the mangrove oyster, Crassostrea rhizophorae cultured in the macrotidal estuary of the Paciência River, Maranhão state, on the northeastern coast of Brazil, and its relationship with environmental factors. Oysters were collected monthly throughout 2013 for histological analysis of sex ratio, gonadal development and condition index. The sex ratio was 1:1.39 (M:F) and only 5 specimens presented hermaphroditism. The breeding process was continuous throughout the year and mature (IIIA stage) and spawning oysters (IIIB stage) were present in practically all months. Low variation in temperature seemed to be the main factor for the continuity of the reproductive cycle. Besides temperature, the relationship between rainfall, salinity and primary productivity affected the stimulus and timing of reproductive events. The rainy season, with low values of salinity and high values of chlorophyll a and particulate organic matter, appeared to be the main reproductive period, with release of gametes and production and maturation of new gamete cohorts in the short term. In the tropics, where gamete maturation and release seem to be continuous and concomitant, the condition index does not appear to be the best method to assess reserve accumulation peaks and gonadal repletion. |
| first_indexed | 2024-12-20T23:50:55Z |
| format | Article |
| id | doaj.art-9f9c50e68e4f4a7b9ae048240f0944ac |
| institution | Directory Open Access Journal |
| issn | 0044-5967 |
| language | English |
| last_indexed | 2024-12-20T23:50:55Z |
| publishDate | 2021-05-01 |
| publisher | Instituto Nacional de Pesquisas da Amazônia |
| record_format | Article |
| series | Acta Amazonica |
| spelling | doaj.art-9f9c50e68e4f4a7b9ae048240f0944ac2022-12-21T19:22:50ZengInstituto Nacional de Pesquisas da AmazôniaActa Amazonica0044-59672021-05-0151211312110.1590/1809-4392202003582Reproductive cycle of the mangrove oyster, Crassostrea rhizophorae (Bivalvia: Ostreidae) cultured in a macrotidal high-salinity zone on the Amazon mangrove coast of BrazilÍcaro ANTONIOhttps://orcid.org/0000-0002-4538-3522Ana SOUSATiago LENZIzabel FUNORodolf LOPESMarina FIGUEIREDOABSTRACT This study aimed to establish the reproductive cycle of the mangrove oyster, Crassostrea rhizophorae cultured in the macrotidal estuary of the Paciência River, Maranhão state, on the northeastern coast of Brazil, and its relationship with environmental factors. Oysters were collected monthly throughout 2013 for histological analysis of sex ratio, gonadal development and condition index. The sex ratio was 1:1.39 (M:F) and only 5 specimens presented hermaphroditism. The breeding process was continuous throughout the year and mature (IIIA stage) and spawning oysters (IIIB stage) were present in practically all months. Low variation in temperature seemed to be the main factor for the continuity of the reproductive cycle. Besides temperature, the relationship between rainfall, salinity and primary productivity affected the stimulus and timing of reproductive events. The rainy season, with low values of salinity and high values of chlorophyll a and particulate organic matter, appeared to be the main reproductive period, with release of gametes and production and maturation of new gamete cohorts in the short term. In the tropics, where gamete maturation and release seem to be continuous and concomitant, the condition index does not appear to be the best method to assess reserve accumulation peaks and gonadal repletion.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672021000200113&tlng=enreproductionspawningenvironmental factorsbrackishwater aquaculture |
| spellingShingle | Ícaro ANTONIO Ana SOUSA Tiago LENZ Izabel FUNO Rodolf LOPES Marina FIGUEIREDO Reproductive cycle of the mangrove oyster, Crassostrea rhizophorae (Bivalvia: Ostreidae) cultured in a macrotidal high-salinity zone on the Amazon mangrove coast of Brazil Acta Amazonica reproduction spawning environmental factors brackishwater aquaculture |
| title | Reproductive cycle of the mangrove oyster, Crassostrea rhizophorae (Bivalvia: Ostreidae) cultured in a macrotidal high-salinity zone on the Amazon mangrove coast of Brazil |
| title_full | Reproductive cycle of the mangrove oyster, Crassostrea rhizophorae (Bivalvia: Ostreidae) cultured in a macrotidal high-salinity zone on the Amazon mangrove coast of Brazil |
| title_fullStr | Reproductive cycle of the mangrove oyster, Crassostrea rhizophorae (Bivalvia: Ostreidae) cultured in a macrotidal high-salinity zone on the Amazon mangrove coast of Brazil |
| title_full_unstemmed | Reproductive cycle of the mangrove oyster, Crassostrea rhizophorae (Bivalvia: Ostreidae) cultured in a macrotidal high-salinity zone on the Amazon mangrove coast of Brazil |
| title_short | Reproductive cycle of the mangrove oyster, Crassostrea rhizophorae (Bivalvia: Ostreidae) cultured in a macrotidal high-salinity zone on the Amazon mangrove coast of Brazil |
| title_sort | reproductive cycle of the mangrove oyster crassostrea rhizophorae bivalvia ostreidae cultured in a macrotidal high salinity zone on the amazon mangrove coast of brazil |
| topic | reproduction spawning environmental factors brackishwater aquaculture |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672021000200113&tlng=en |
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