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| Mendonça,Sibele Alves de; Macena,Bruno César Luz; Araújo,Camila Brasilino Botêlho de; Bezerra,Natalia Priscila Alves; Hazin,Fabio Hissa Vieira. |
| Abstract The present work aimed at studying the sicklefin devil ray (Mobula tarapacana) that aggregates seasonally in the Saint Peter and Saint Paul Archipelago (SPSPA). From December 2008 to June 2016, 827 rays were sighted through free diving visual census survey. From the total of the records, it was possible to identify the sex of 361 specimens, in which 215 were females and 146 were males. The disk width ranged from 2.40 m to 3.20 m with mean size of 2.60 m, for both males and females, indicating that the population is composed by sub-adults and adults. Using photo-identification of the pectoral-fins in the ventral side, 11 males and 44 females were identified and compared with each other, but no re-sight was detected. Recent mating scars were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Elasmobranch; Photo-identification; Reproduction area; Sexual aggregation. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000300209 |
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| CAPELLA,JUAN J; GIBBONS,JORGE; FLÓREZ-GONZÁLEZ,LILIÁN; LLANO,MARTHA; VALLADARES,CARLOS; SABAJ,VALERIA; VILINA,YERKO A. |
| Humpback whales undertake seasonal migration between productive high-latitude areas where they feed in summer and low-latitude tropical waters where mating and calving occur during winter. In the eastern south Pacific, the species breeds off Colombia and Ecuador, and feeds primarily in the western Antarctic Peninsula and in the waters of the Strait of Magellan (SM), recently described as a new feeding ground for humpback whales. Comparison of fluke photographs of 62 individuals from the SM obtained during the austral summer from 1999 to 2005 and 1,042 individuals from Colombia, provided conclusive matches for six individuals, with an overall interchange Índex of 0.093. Eight migratory trips between summer and winter grounds were registered for four whales... |
| Tipo: Journal article |
Palavras-chave: Colombia; Humpback whales; Migration; Photo-identification; Strait of Magellan. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000400008 |
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| Nery,Mariana F.; Espécie,Mariana de A.; Simão,Sheila M.. |
| Estuarine dolphins, Sotalia guianensis (Van Bénéden, 1864), were identified in Sepetiba Bay (22º35'S, 44º03'W), state of Rio de Janeiro, Brazil, between February 1994 and July 2006 using the photo-identification method. A total of 72 surveys resulted in the identification and cataloguing of 217 individual dolphins. Seventy-nine (36%) were resighted at least once during the study period. The average interval between resightings was 40,6 ± 31,1 months. Large numbers of mother-and-calf pairs were recorded during the 12 years and new individuals were frequently encountered in the photographic records. These results suggest that part of the dolphin population is more consistently found in Sepetiba Bay, probably for feeding and reproduction, while other... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Estuarine dolphin; Habitat use; Photo-identification. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000200004 |
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