Prey consumed by Guiana dolphin Sotalia guianensis (Cetacea, Delphinidae) and franciscana dolphin Pontoporia blainvillei (Cetacea, Pontoporiidae) in an estuarine environment in southern Brazil
The present study provides information about the diet of sympatric populations of small cetaceans in the Babitonga Bay estuary. This is the first study on the diet of these species in direct sympatry. The stomach contents of seven Guiana dolphins Sotalia guianensis and eight franciscanas Pontoporia...
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| Format: | Article |
| Language: | English |
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Fundação Zoobotânica do Rio Grande do Sul
2012-06-01
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| Series: | Iheringia: Série Zoologia |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000200003&lng=en&tlng=en |
| _version_ | 1819212358547931136 |
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| author | Marta J. Cremer Pedro C. Pinheiro Paulo C. Simões-Lopes |
| author_facet | Marta J. Cremer Pedro C. Pinheiro Paulo C. Simões-Lopes |
| author_sort | Marta J. Cremer |
| collection | DOAJ |
| description | The present study provides information about the diet of sympatric populations of small cetaceans in the Babitonga Bay estuary. This is the first study on the diet of these species in direct sympatry. The stomach contents of seven Guiana dolphins Sotalia guianensis and eight franciscanas Pontoporia blainvillei were analyzed. The prey of both cetaceans was mostly teleost fishes, followed by cephalopods. We identified 13 teleost fishes as part of the diet of the franciscanas, and 20 as part of the diet of Guiana dolphins. Lolliguncula brevis was the only cephalopod recorded, and was the most important prey for both cetaceans. Stellifer rastrifer and Gobionellus oceanicus were also important for franciscana, so as Mugil curema and Micropogonias furnieri were important for Guiana dolphins. Stellifer rastrifer and Cetengraulis edentulus were the fishes with the highest frequency of occurrence for franciscana (50%), while Achirus lineatus, C. edentulus, S. brasiliensis, Cynoscion leiarchus, M. furnieri, M. curema, Diapterus rhombeus, Eugerres brasilianus and G. oceanicus showed 28.6% of frequency of occurrence for Guiana dolphins. Franciscanas captured greater cephalopods than the Guiana dolphins in both total length (z= -3.38; n= 40; p< 0.05) and biomass (z = -2.46; n = 40; p<0.05). All of the prey species identified occur inside the estuary, which represents a safe habitat against predators and food availability, reinforcing the importance of the Babitonga Bay for these cetacean populations. |
| first_indexed | 2024-12-23T06:41:42Z |
| format | Article |
| id | doaj.art-29d0aa3d7e1f47e89d4cb4d5f453d667 |
| institution | Directory Open Access Journal |
| issn | 1678-4766 |
| language | English |
| last_indexed | 2024-12-23T06:41:42Z |
| publishDate | 2012-06-01 |
| publisher | Fundação Zoobotânica do Rio Grande do Sul |
| record_format | Article |
| series | Iheringia: Série Zoologia |
| spelling | doaj.art-29d0aa3d7e1f47e89d4cb4d5f453d6672022-12-21T17:56:41ZengFundação Zoobotânica do Rio Grande do SulIheringia: Série Zoologia1678-47662012-06-01102213113710.1590/S0073-47212012000200003S0073-47212012000200003Prey consumed by Guiana dolphin Sotalia guianensis (Cetacea, Delphinidae) and franciscana dolphin Pontoporia blainvillei (Cetacea, Pontoporiidae) in an estuarine environment in southern BrazilMarta J. Cremer0Pedro C. Pinheiro1Paulo C. Simões-Lopes2Universidade da Região de JoinvilleUniversidade da Região de JoinvilleUniversidade Federal de Santa CatarinaThe present study provides information about the diet of sympatric populations of small cetaceans in the Babitonga Bay estuary. This is the first study on the diet of these species in direct sympatry. The stomach contents of seven Guiana dolphins Sotalia guianensis and eight franciscanas Pontoporia blainvillei were analyzed. The prey of both cetaceans was mostly teleost fishes, followed by cephalopods. We identified 13 teleost fishes as part of the diet of the franciscanas, and 20 as part of the diet of Guiana dolphins. Lolliguncula brevis was the only cephalopod recorded, and was the most important prey for both cetaceans. Stellifer rastrifer and Gobionellus oceanicus were also important for franciscana, so as Mugil curema and Micropogonias furnieri were important for Guiana dolphins. Stellifer rastrifer and Cetengraulis edentulus were the fishes with the highest frequency of occurrence for franciscana (50%), while Achirus lineatus, C. edentulus, S. brasiliensis, Cynoscion leiarchus, M. furnieri, M. curema, Diapterus rhombeus, Eugerres brasilianus and G. oceanicus showed 28.6% of frequency of occurrence for Guiana dolphins. Franciscanas captured greater cephalopods than the Guiana dolphins in both total length (z= -3.38; n= 40; p< 0.05) and biomass (z = -2.46; n = 40; p<0.05). All of the prey species identified occur inside the estuary, which represents a safe habitat against predators and food availability, reinforcing the importance of the Babitonga Bay for these cetacean populations.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000200003&lng=en&tlng=enDietaBaía da Babitongacetáceospeixescefalópodes |
| spellingShingle | Marta J. Cremer Pedro C. Pinheiro Paulo C. Simões-Lopes Prey consumed by Guiana dolphin Sotalia guianensis (Cetacea, Delphinidae) and franciscana dolphin Pontoporia blainvillei (Cetacea, Pontoporiidae) in an estuarine environment in southern Brazil Iheringia: Série Zoologia Dieta Baía da Babitonga cetáceos peixes cefalópodes |
| title | Prey consumed by Guiana dolphin Sotalia guianensis (Cetacea, Delphinidae) and franciscana dolphin Pontoporia blainvillei (Cetacea, Pontoporiidae) in an estuarine environment in southern Brazil |
| title_full | Prey consumed by Guiana dolphin Sotalia guianensis (Cetacea, Delphinidae) and franciscana dolphin Pontoporia blainvillei (Cetacea, Pontoporiidae) in an estuarine environment in southern Brazil |
| title_fullStr | Prey consumed by Guiana dolphin Sotalia guianensis (Cetacea, Delphinidae) and franciscana dolphin Pontoporia blainvillei (Cetacea, Pontoporiidae) in an estuarine environment in southern Brazil |
| title_full_unstemmed | Prey consumed by Guiana dolphin Sotalia guianensis (Cetacea, Delphinidae) and franciscana dolphin Pontoporia blainvillei (Cetacea, Pontoporiidae) in an estuarine environment in southern Brazil |
| title_short | Prey consumed by Guiana dolphin Sotalia guianensis (Cetacea, Delphinidae) and franciscana dolphin Pontoporia blainvillei (Cetacea, Pontoporiidae) in an estuarine environment in southern Brazil |
| title_sort | prey consumed by guiana dolphin sotalia guianensis cetacea delphinidae and franciscana dolphin pontoporia blainvillei cetacea pontoporiidae in an estuarine environment in southern brazil |
| topic | Dieta Baía da Babitonga cetáceos peixes cefalópodes |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000200003&lng=en&tlng=en |
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