Records of Guiana dolphin, Sotalia guianensis, in the State of Ceará, Northeastern Brazil

Meirelles, Ana Carolina Oliveira de; Ribeiro, Alexandre C.; Silva, C. P. N.; Soares-Filho, Aldeney Andrade

doi:10.5597/lajam00157

Cited by 24 publications

(34 citation statements)

References 16 publications

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“…In addition, this area is strongly influenced by intense coastal upwelling. Similar results were found by Meirelles et al (2006) off the Ceará coast. killer whales, Orcinus orca) are attracted to feed in this area and could predate on marine tucuxi dolphins (Siciliano et al, 1999(Siciliano et al, , 2006.…”

Section: R E S U L T S a N D Discussionsupporting

confidence: 87%

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Marine tucuxi dolphin ( Sotalia guianensis) and its interaction with passive gill-net fisheries along the northern coast of the Rio de Janeiro State, Brazil

Moura

Sholl

Rodrigues

et al. 2009

Mar. Biodivers. Rec.

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During a monitoring programme of stranded marine mammals conducted along the north-east coast of the Rio de Janeiro State, Brazil, we collected marine tucuxi dolphins (Sotalia guianensis) stranded along the beach. We examined the carcasses to identify characteristic evidences of fishery by-catch. From July 2001 to August 2007 43 S. guianensis were found in the study area, with an annual mean of 6.1 stranding events. Dolphins stranded with evidence of fishery interaction ('by-catch') occurred in almost every year (annual mean ¼ 2). The majority of the by-catch events occurred during winter and spring. Most of the stranded dolphins were sexually mature. From 43 S. guianensis stranded from 2001 to 2007, 32.5% (N ¼ 14) of these presented evidence of by-catch. Twenty-nine other dolphins did not show clear evidence of by-catch or it could not be evaluated. Most of the by-caught dolphins occurred in the northern zones of the study area where gill-net use is intense.

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Section: R E S U L T S a N D Discussionsupporting

confidence: 87%

“…In Ceará State Monteiro-Neto et al (2000) showed that by-catch was more frequent in marine tucuxi dolphins that were .160 cm total body length. Santos et al (2003) and Meirelles et al (2006) also found similar results from the south-east and north-east coast of Brazil, respectively.…”

Section: R E S U L T S a N D Discussionsupporting

confidence: 53%

Marine tucuxi dolphin ( Sotalia guianensis) and its interaction with passive gill-net fisheries along the northern coast of the Rio de Janeiro State, Brazil

Moura

Sholl

Rodrigues

et al. 2009

Mar. Biodivers. Rec.

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“…Conversely, santos et al (2002) reported a higher proportion of male strandings for franciscanas in the coast of São Paulo state. For Guiana dolphins, the higher number of stranded males (0,58F:1M, p = 0.0262) was also different from studies in other regions of the Brazilian coast, suggesting a high prevalence of female strandings (Moura et al 2009, Meirelles et al 2010). …”

Section: Sexual Distribution Of Strandings and Presumed Causes Of Deathmentioning

confidence: 68%

“…A higher number of strandings during winter months was observed by Meirelles et al (2010) on the coast of Ceará state, also on the northeastern coast of Brazil. The latter authors suggest the high mortality during this time could be related with fisheries bycatch, since this is one of the periods of the year with stronger fishing activity.…”

Section: Sexual Distribution Of Strandings and Presumed Causes Of Deathmentioning

confidence: 96%

Review of thirty-two years of toothed whale strandings in Santa Catarina, southern Brazil (Cetacea: Odontoceti)

Vianna

Loch

Castilho

et al. 2016

Zoologia (Curitiba)

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“…Therefore, evidence of bycatch such as nets and rope marks and lesions were not possible to be identified. The interaction between cetaceans and fisheries in northern Brazil is mainly reported for the Guiana dolphin (Monteiro-Neto et al, 2000;Tosi et al, 2007;Meirelles et al, 2010), but it is also reported for rough-toothed dolphin, Steno bredanensis, Clymene dolphin Stenella clymene, Atlantic spotted dolphin Stenella frontalis, melon-headed whale Peponocephala electra and short-finned pilot whale Globicephala macrorhynchus (Meirelles et al, 2009). The same authors reported a bottlenose dolphin carcass in which eyes, dorsal fin and meat had been removed.…”

Section: Discussionmentioning

confidence: 99%

Reports of strandings and sightings of bottlenose dolphins (Tursiops truncatus) in northeastern Brazil and Brazilian oceanic islands

Meirelles

Campos

Marcondes

et al. 2017

Lat. Am. J. Aquat. Mamm.

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This study revises and updates information on bottlenose dolphin Tursiops truncatusstrandings and sightings in northeastern Brazil. A total of 72 strandings were recorded from 1992 to 2010, and 51 sightings were recorded from 1988 to 2010 along the states from Ceará to Bahia, including Fernando de Noronha and São Pedro and São Paulo archipelagos, Rocas Atoll and Abrolhos Bank. Most strandings were recorded in the states of Pernambuco, Bahia and Rio Grande do Norte. The number of reports was higher during summer, but no statistically significant difference was found between summer and other seasons. The majority of the stranded animals were adults (70.6%). Stranded calves were not observed. Total body length ranged from 138 to 321cm: 138 to 310cm for males; and 168 to 288cm for females. The average adult body length was 281cm (SD = 0.22). For stranding events where sex was determined (n = 29), a highly statistically significant difference was found between the number of males (n = 21) and females (n = 8). A total of six animals (8.3%) showed evidence of fisheries interactions such as net marks or removal of meat, blubber and eyes. Twenty-two sightings were recorded in the northeastern region, mostly in small islands and Rocas Atoll. This finding shows that the bottlenose dolphin is mainly an oceanic species in the region. More efforts are needed to improve our understanding of the populations and conservation status of bottlenose dolphins in this region.

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Records of Guiana dolphin, Sotalia guianensis, in the State of Ceará, Northeastern Brazil

Cited by 24 publications

References 16 publications

Marine tucuxi dolphin ( Sotalia guianensis) and its interaction with passive gill-net fisheries along the northern coast of the Rio de Janeiro State, Brazil

Marine tucuxi dolphin ( Sotalia guianensis) and its interaction with passive gill-net fisheries along the northern coast of the Rio de Janeiro State, Brazil

Review of thirty-two years of toothed whale strandings in Santa Catarina, southern Brazil (Cetacea: Odontoceti)

Reports of strandings and sightings of bottlenose dolphins (Tursiops truncatus) in northeastern Brazil and Brazilian oceanic islands

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