Comparative growth analysis of two populations of Pontoporia blainvillei on the Brazilian coast
The von Bertalanffy growth model was applied to franciscana dolphins (Pontoporia blainvillei) incidentally caught in fishing nets on the São Paulo/Paraná coasts (25°00′-25°58′S), and compared with the growth of franciscanas incidentally caught on the Rio Grande do Sul coast (29°-33°S). In both locat...
| Autor principal: | Barreto, André S. |
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| Outros Autores: | Weber Rosas, Fernando Cesar |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Marine Mammal Science
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18741 |
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oai:repositorio:1-18741 |
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oai:repositorio:1-18741 Comparative growth analysis of two populations of Pontoporia blainvillei on the Brazilian coast Barreto, André S. Weber Rosas, Fernando Cesar Coast Dolphin Fishing Marine Ecosystem Population Characteristics Population Growth Sexual Dimorphism Brasil Parana Rio Grande Do Sul Sao Paulo [brazil] South America Animalsia Pontoporia Blainvillei The von Bertalanffy growth model was applied to franciscana dolphins (Pontoporia blainvillei) incidentally caught in fishing nets on the São Paulo/Paraná coasts (25°00′-25°58′S), and compared with the growth of franciscanas incidentally caught on the Rio Grande do Sul coast (29°-33°S). In both locations, a difference was noted between the growth of males and females, confirming the sexual dimorphism of the body proportions of this dolphin. The growth curves of the dolphins from São Paulo/Paraná were significantly different (P < 0.01) from those obtained from Rio Grande do Sul, with significantly smaller animals in the former area. On the São Paulo/Paraná coast, the stabilization of the growth curves happened at a total length of 113 and 129 cm for males (n = 23) and females (n = 18), respectively. In Rio Grande do Sul, they stabilized at 130 cm for the males (n = 59) and at 146 cm (n = 48) for the females. These results corroborate the morphometric differences previously mentioned in the literature, which resulted in the identification of a smaller northern form and a larger southern form of P. blainvillei. The data here presented can be used for future comparisons of changes in growth parameters of these two franciscana stocks and help to develop proper conservation programs for the species. © 2006 by the Society for Marine Mammalogy. 2020-06-15T22:02:50Z 2020-06-15T22:02:50Z 2006 Artigo https://repositorio.inpa.gov.br/handle/1/18741 10.1111/j.1748-7692.2006.00040.x en Volume 22, Número 3, Pags. 644-653 Restrito Marine Mammal Science |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Coast Dolphin Fishing Marine Ecosystem Population Characteristics Population Growth Sexual Dimorphism Brasil Parana Rio Grande Do Sul Sao Paulo [brazil] South America Animalsia Pontoporia Blainvillei |
| spellingShingle |
Coast Dolphin Fishing Marine Ecosystem Population Characteristics Population Growth Sexual Dimorphism Brasil Parana Rio Grande Do Sul Sao Paulo [brazil] South America Animalsia Pontoporia Blainvillei Barreto, André S. Comparative growth analysis of two populations of Pontoporia blainvillei on the Brazilian coast |
| topic_facet |
Coast Dolphin Fishing Marine Ecosystem Population Characteristics Population Growth Sexual Dimorphism Brasil Parana Rio Grande Do Sul Sao Paulo [brazil] South America Animalsia Pontoporia Blainvillei |
| description |
The von Bertalanffy growth model was applied to franciscana dolphins (Pontoporia blainvillei) incidentally caught in fishing nets on the São Paulo/Paraná coasts (25°00′-25°58′S), and compared with the growth of franciscanas incidentally caught on the Rio Grande do Sul coast (29°-33°S). In both locations, a difference was noted between the growth of males and females, confirming the sexual dimorphism of the body proportions of this dolphin. The growth curves of the dolphins from São Paulo/Paraná were significantly different (P < 0.01) from those obtained from Rio Grande do Sul, with significantly smaller animals in the former area. On the São Paulo/Paraná coast, the stabilization of the growth curves happened at a total length of 113 and 129 cm for males (n = 23) and females (n = 18), respectively. In Rio Grande do Sul, they stabilized at 130 cm for the males (n = 59) and at 146 cm (n = 48) for the females. These results corroborate the morphometric differences previously mentioned in the literature, which resulted in the identification of a smaller northern form and a larger southern form of P. blainvillei. The data here presented can be used for future comparisons of changes in growth parameters of these two franciscana stocks and help to develop proper conservation programs for the species. © 2006 by the Society for Marine Mammalogy. |
| format |
Artigo |
| author |
Barreto, André S. |
| author2 |
Weber Rosas, Fernando Cesar |
| author2Str |
Weber Rosas, Fernando Cesar |
| title |
Comparative growth analysis of two populations of Pontoporia blainvillei on the Brazilian coast |
| title_short |
Comparative growth analysis of two populations of Pontoporia blainvillei on the Brazilian coast |
| title_full |
Comparative growth analysis of two populations of Pontoporia blainvillei on the Brazilian coast |
| title_fullStr |
Comparative growth analysis of two populations of Pontoporia blainvillei on the Brazilian coast |
| title_full_unstemmed |
Comparative growth analysis of two populations of Pontoporia blainvillei on the Brazilian coast |
| title_sort |
comparative growth analysis of two populations of pontoporia blainvillei on the brazilian coast |
| publisher |
Marine Mammal Science |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18741 |
| _version_ |
1787145435100479488 |
| score |
11.678145 |