Sexual dimorphism and body scarring in the boto (Amazon river dolphin) Inia geoffrensis
Measurements and quantitative descriptions of a large sample of live adult botos (Inia geoffrensis) were obtained from the Mamirauá Reserve in the central Amazon. Males were on average 16% longer and weighed 55% more than females, demonstrating that this species is one of the most sexually dimorphic...
| Autor principal: | Martin, Anthony Richard |
|---|---|
| Outros Autores: | Silva, Vera Maria Ferreira da |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Marine Mammal Science
2020
|
| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18786 |
| id |
oai:repositorio:1-18786 |
|---|---|
| recordtype |
dspace |
| spelling |
oai:repositorio:1-18786 Sexual dimorphism and body scarring in the boto (Amazon river dolphin) Inia geoffrensis Martin, Anthony Richard Silva, Vera Maria Ferreira da Cetacean Color Sexual Dimorphism Amazon River Amazonas Brasil Mamiraua Sustainable Development Reserve South America Cetacea Dolphin (cetacean) Inia Geoffrensis Mammalia Physeteridae Measurements and quantitative descriptions of a large sample of live adult botos (Inia geoffrensis) were obtained from the Mamirauá Reserve in the central Amazon. Males were on average 16% longer and weighed 55% more than females, demonstrating that this species is one of the most sexually dimorphic of all cetaceans for size. Males were also pinker than females, more heavily scarred by intraspecific tooth rakes, and had more life-threatening injuries. Some larger males had areas of modified skin that may simply be scar tissue, but may also be a heritable characteristic used as a shield or weapon. As in sperm whales, sexual size dimorphism and male-male aggression appear to be linked in botos, suggesting fierce competition for a resource - probably mating opportunities. The boto is unique among river dolphins in that males are larger than females. This distinction implies long evolutionary separation and fundamental differences in social behavior. © 2006 by the Society for Marine Mammalogy. 2020-06-15T22:03:01Z 2020-06-15T22:03:01Z 2006 Artigo https://repositorio.inpa.gov.br/handle/1/18786 10.1016/j.jhydrol.2005.10.040 en Volume 22, Número 1, Pags. 25-33 Restrito Marine Mammal Science |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Cetacean Color Sexual Dimorphism Amazon River Amazonas Brasil Mamiraua Sustainable Development Reserve South America Cetacea Dolphin (cetacean) Inia Geoffrensis Mammalia Physeteridae |
| spellingShingle |
Cetacean Color Sexual Dimorphism Amazon River Amazonas Brasil Mamiraua Sustainable Development Reserve South America Cetacea Dolphin (cetacean) Inia Geoffrensis Mammalia Physeteridae Martin, Anthony Richard Sexual dimorphism and body scarring in the boto (Amazon river dolphin) Inia geoffrensis |
| topic_facet |
Cetacean Color Sexual Dimorphism Amazon River Amazonas Brasil Mamiraua Sustainable Development Reserve South America Cetacea Dolphin (cetacean) Inia Geoffrensis Mammalia Physeteridae |
| description |
Measurements and quantitative descriptions of a large sample of live adult botos (Inia geoffrensis) were obtained from the Mamirauá Reserve in the central Amazon. Males were on average 16% longer and weighed 55% more than females, demonstrating that this species is one of the most sexually dimorphic of all cetaceans for size. Males were also pinker than females, more heavily scarred by intraspecific tooth rakes, and had more life-threatening injuries. Some larger males had areas of modified skin that may simply be scar tissue, but may also be a heritable characteristic used as a shield or weapon. As in sperm whales, sexual size dimorphism and male-male aggression appear to be linked in botos, suggesting fierce competition for a resource - probably mating opportunities. The boto is unique among river dolphins in that males are larger than females. This distinction implies long evolutionary separation and fundamental differences in social behavior. © 2006 by the Society for Marine Mammalogy. |
| format |
Artigo |
| author |
Martin, Anthony Richard |
| author2 |
Silva, Vera Maria Ferreira da |
| author2Str |
Silva, Vera Maria Ferreira da |
| title |
Sexual dimorphism and body scarring in the boto (Amazon river dolphin) Inia geoffrensis |
| title_short |
Sexual dimorphism and body scarring in the boto (Amazon river dolphin) Inia geoffrensis |
| title_full |
Sexual dimorphism and body scarring in the boto (Amazon river dolphin) Inia geoffrensis |
| title_fullStr |
Sexual dimorphism and body scarring in the boto (Amazon river dolphin) Inia geoffrensis |
| title_full_unstemmed |
Sexual dimorphism and body scarring in the boto (Amazon river dolphin) Inia geoffrensis |
| title_sort |
sexual dimorphism and body scarring in the boto (amazon river dolphin) inia geoffrensis |
| publisher |
Marine Mammal Science |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18786 |
| _version_ |
1787141786949386240 |
| score |
11.755432 |