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Estudio preliminar sobre la diversidad, distribución y abundancia de cetáceos en aguas profundas del Golfo de México Cetaceans in deep water of Gulf of Mexico
| Content Provider | Semantic Scholar |
|---|---|
| Author | Castán, Laura Vázquez Serrano, Arturo Galindo, José Angel |
| Copyright Year | 2009 |
| Abstract | The Gulf of Mexico is one of the most productive bodies of water in the World at an ecological and economic level. Its waters harbor spectacular ecosystems, and one of the greatest biological diversity on earth, but there is a lack of information in Mexican waters. Consequently, the objective of this study was to investigate the diversity, distribution and relative abundance of marine mammals in the Northern Region of the Gulf of Mexico. The study area lies between the parallels 25° 40’ N, 95° 03’ W and 19° 06’ N, 95° 16’ W. This area was from the border with the United States down to Alvarado, Veracruz State, Mexico. An oceanographic ship was used to carry on line transects that covered the entire study area. The diversity was estimated using the Margalef Diversity Index and the abundance was estimated using the Distance Sampling methodology. The distribution was determine registering the observed animals position using a GPS, and the relative abundance was estimated by the total animals observed divided by the total search effort. Six cetacean species were observed: Bottlenose dolphins (Tursiops truncatus), false killer whales (Pseudorca crassidens), Risso’s dolphins (Steno bredanensis), Spotted dolphins (Stenella frontalis), and unidentified species of dolphin. The estimated marine mammal diversity was 0.870 for the entire study area according to the Margalef Index. The abundance for the entire study area was 12084 (CV = 65.21), density was 0.619 cetaceans/km 2 (CV = 65.21), and group density was 0.210 cetaceans/km 2 (CV = 65.21%). The observed cetaceans were found in waters depths that ranged from 300 m to 3000. The relative abundance for was 0.12 cetacean/hr for all the study area. The five cetacean species identified represent 18% of the reported species for the U.S. waters in the Gulf of Mexico, thus, our study area is high in marine mammal diversity. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://tspace.library.utoronto.ca/bitstream/1807/45546/1/cg09117.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
