Reproduction of the estuarine dolphin (Sotalia guianensis) on the coast of Paraná, southern Brazil
The estuarine dolphin (Sotalia guianensis) is common along most of the Brazilian coast, but little is known about its reproduction. We analyzed the gonads of 50 individuals incidentally caught in fishing nets on the coast of Paraná, southern Brazil, between 1997 and 1999. Testes of adult males were...
| Autor principal: | Weber Rosas, Fernando Cesar |
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| Outros Autores: | Monteiro-Filho, Emygdio L.A. |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Journal of Mammalogy
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/16415 |
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oai:repositorio:1-16415 |
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dspace |
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oai:repositorio:1-16415 Reproduction of the estuarine dolphin (Sotalia guianensis) on the coast of Paraná, southern Brazil Weber Rosas, Fernando Cesar Monteiro-Filho, Emygdio L.A. Dolphin Reproductive Biology Reproductive Cycle Brasil Mammalia Sotalia Vertebrata The estuarine dolphin (Sotalia guianensis) is common along most of the Brazilian coast, but little is known about its reproduction. We analyzed the gonads of 50 individuals incidentally caught in fishing nets on the coast of Paraná, southern Brazil, between 1997 and 1999. Testes of adult males were ≤31.9 cm in length and ≤11.6 cm in width and ≤3.3% of the total body mass. Relative size of testes suggests a multimale mating system with sperm competition. Females ovulate in both ovaries, although the left ovary matures earlier than the right. Males reached sexual maturity at 7 years and at body lengths estimated at 170-175 cm. Females matured at 5-8 years of age and at body lengths of 164-169 cm. The reproductive cycle was estimated at 2 years, with no marked seasonality in ovulation or timing of birth. Gestation was about 12 months, fetal growth rate was 9 cm/month, and length at birth was estimated at 92.2 cm. Females older than 25 years had senescent ovaries. 2020-06-04T15:17:43Z 2020-06-04T15:17:43Z 2002 Artigo https://repositorio.inpa.gov.br/handle/1/16415 10.1644/1545-1542(2002)083<0507:ROTEDS>2.0.CO;2 en Volume 83, Número 2, Pags. 507-515 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Journal of Mammalogy |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Dolphin Reproductive Biology Reproductive Cycle Brasil Mammalia Sotalia Vertebrata |
| spellingShingle |
Dolphin Reproductive Biology Reproductive Cycle Brasil Mammalia Sotalia Vertebrata Weber Rosas, Fernando Cesar Reproduction of the estuarine dolphin (Sotalia guianensis) on the coast of Paraná, southern Brazil |
| topic_facet |
Dolphin Reproductive Biology Reproductive Cycle Brasil Mammalia Sotalia Vertebrata |
| description |
The estuarine dolphin (Sotalia guianensis) is common along most of the Brazilian coast, but little is known about its reproduction. We analyzed the gonads of 50 individuals incidentally caught in fishing nets on the coast of Paraná, southern Brazil, between 1997 and 1999. Testes of adult males were ≤31.9 cm in length and ≤11.6 cm in width and ≤3.3% of the total body mass. Relative size of testes suggests a multimale mating system with sperm competition. Females ovulate in both ovaries, although the left ovary matures earlier than the right. Males reached sexual maturity at 7 years and at body lengths estimated at 170-175 cm. Females matured at 5-8 years of age and at body lengths of 164-169 cm. The reproductive cycle was estimated at 2 years, with no marked seasonality in ovulation or timing of birth. Gestation was about 12 months, fetal growth rate was 9 cm/month, and length at birth was estimated at 92.2 cm. Females older than 25 years had senescent ovaries. |
| format |
Artigo |
| author |
Weber Rosas, Fernando Cesar |
| author2 |
Monteiro-Filho, Emygdio L.A. |
| author2Str |
Monteiro-Filho, Emygdio L.A. |
| title |
Reproduction of the estuarine dolphin (Sotalia guianensis) on the coast of Paraná, southern Brazil |
| title_short |
Reproduction of the estuarine dolphin (Sotalia guianensis) on the coast of Paraná, southern Brazil |
| title_full |
Reproduction of the estuarine dolphin (Sotalia guianensis) on the coast of Paraná, southern Brazil |
| title_fullStr |
Reproduction of the estuarine dolphin (Sotalia guianensis) on the coast of Paraná, southern Brazil |
| title_full_unstemmed |
Reproduction of the estuarine dolphin (Sotalia guianensis) on the coast of Paraná, southern Brazil |
| title_sort |
reproduction of the estuarine dolphin (sotalia guianensis) on the coast of paraná, southern brazil |
| publisher |
Journal of Mammalogy |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/16415 |
| _version_ |
1787142594544795648 |
| score |
11.674684 |