High organochlorine accumulation in blubber of Guiana dolphin, Sotalia guianensis, from Brazilian coast and its use to establish geographical differences among populations

Lailson‐Brito, José; Dorneles, Paulo R.; Azevedo-Silva, Cláudio E.; Azevedo, Alexandre F.; Vidal, Lara G.; Zanelatto, Regina Celia; Lozinski, C.P.C.; Azeredo, Antônio; Fragoso, Ana Bernadete Lima; Cunha, Haydée A.; Torres, João Paulo Machado; Malm, Olaf

doi:10.1016/j.envpol.2009.11.002

Cited by 79 publications

(47 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Di Beneditto and Ramos (2004) observed that age range was zero -21 years for males and 0.5 -33 years for females in northern Rio de Janeiro state, Brazil. Lailson-Brito et al (2010) reported that maximum age for S. guianensis was 14 years for one male in Guanabara Bay, 13 years for one male in Sepetiba Bay, and 20 years for one female in Paranaguá Bay, all of which are in Brazil. These values are similar, and suggest higher life expectancy for females of the species.…”

Section: Discussionmentioning

confidence: 99%

Variation of age and total length in Sotalia guianensis (Van Bénéden, 1864) (Cetacea, Delphinidae), on the coast of Espírito Santo state, Brazil

et al. 2016

View full text Add to dashboard Cite

Variations of age and total length of Sotalia guianensis from the state of Espírito Santo, Brazil, were evaluated. Specimens were found stranded. Age and total length of 44 Guiana dolphins were assessed based on tooth analysis. Age varied between 0.5 year and 33 years (mean = 8.23 years). Most specimens were between zero and 6 years old (47%). Total length varied from 119 cm to 198 cm, with mean of 172.52 cm. Asymptotic length was reached at 185 cm and approximately 5-6 years of age. Mean total length and age were higher than in other regions of the distribution range of the species. Nevertheless, more studies have to be carried out to evaluate the morphological variations in S. guianensis populations in the study area and Brazil.Keywords: Guiana dolphin, age, total length. Variação etária e de comprimento total de

show abstract

Section: Discussionmentioning

confidence: 99%

Variation of age and total length in Sotalia guianensis (Van Bénéden, 1864) (Cetacea, Delphinidae), on the coast of Espírito Santo state, Brazil

et al. 2016

View full text Add to dashboard Cite

show abstract

“…As both species of cetaceans are composed of small populations foraging in Babitonga Bay and are threatened by several anthropogenic impacts (Cremer 2007, Danilewicz et al 2010, Lailson-Brito et al 2010, Yogui et al 2010, detailed information about the feeding ecology of these species and other species linked to them is important in order to establish effective conservation initiatives. In previous studies on the population distribution of Franciscana dolphins in the bay, Cremer & Simões-Lopes (2005 suggested that the population is resident, which has increased the level of concern for their conservation.…”

Section: Introductionmentioning

confidence: 99%

Use of carbon and nitrogen stable isotopes to study the feeding ecology of small coastal cetacean populations in southern Brazil

et al. 2013

View full text Add to dashboard Cite

of carbon and nitrogen stable isotopes to study the feeding ecology of small coastal cetacean populations in southern Brazil. Biota Neotrop. 13(4): http://www.biotaneotropica.org.br/v13n4/en/abstract?article+bn01413042013Abstract: Samples from individuals of the populations of Sotalia guianensis (Guiana) and Pontoporia blainvillei (Franciscana) dolphins living in the Babitonga Bay estuary (26° 28' S/48° 50' W), and samples from individuals of a second population of P. blainvillei from a nearshore area (26° 38' S/48° 41' W), were collected and analyzed along with their prey between 2000 and 2006, to determine the carbon and nitrogen stable isotope ratios and to verify differences in their feeding ecology. No differences were found in the median ð 15 N values of Guiana (15.2‰) and Franciscana (15.9‰) dolphins living in Babitonga Bay, nor of nearshore Franciscana (15.0‰) individuals, suggesting no variation in the trophic level of these populations. However, the lack of more information on the isotopic compositions of their putative prey in the nearshore areas prevents the ability to draw definitive conclusions on this issue. The estuarine Franciscana and Guiana dolphin populations presented mean ð 13 C values of approximately -15.7‰, which were not statistically different from nearshore Franciscana individuals (-14.8‰). Based on stomach content analyses of these species from a previous study, it was reported that there was little overlap in the diet of estuarine Franciscanas and Guiana dolphins. However, based on the similarity of the ð 13 C values between these two species and of their putative prey, it appears that in fact there is an overlap in the diet of these two species. Based solely on stable isotope analysis, it was not possible to differentiate between estuarine and nearshore Franciscana populations, making it difficult to conclude whether captured nearshore specimens were indeed yearlong residents of these areas. Finally, this study suggests that Franciscana and Guiana dolphin populations are sharing the same resources, mostly L. brevis, D. rhombeus, and S. rastrifer. Therefore, the combination of resource sharing and commercial exploitation of their prey makes these two cetacean species vulnerable. Keywords: Pontoporia blainvillei, Sotalia guianensis, Babitonga Bay, feeding ecology, trophic level.HARDT, F.A.S., CREMER, M.J., TONELLO JUNIOR, A.J., BELLANTE, A., BUFFA, G., BUSCAINO, G., MAZZOLA, S., BARRETO, A.S., MARTINELLI, L.A. & ZUPPI, G.M. O uso dos isótopos estáveis de carbono e nitrogênio para o estudo da ecologia de populações de pequenos cetáceos costeiros no sul do Brasil. Biota Neotrop. 13(4): http://www.biotaneotropica.org.br/v13n4/pt/abstract?article+bn01413042013Resumo: Amostras de tecido de indivíduos pertencentes às populações de Sotalia guianensis (boto-cinza) e Pontoporia blainvillei (toninha) que vivem no estuário da Baía da Babitonga (26° 28' S/48° 50' W) e de uma segunda população de P. blainvillei da área costeira (26° 38' S/48° 41' W) foram coletadas entre os anos 2000 e 2006 para ...

show abstract

“…heavy metals, polychlorinated biphenyls and chlorinated pesticides) biomagnify through food chains, reaching high concentration in top-order predators, such as marine mammals (Gray, 2002;Lailson-Brito et al, 2010;2012;Bisi et al, 2011). Limited information has been published on contamination levels for the genus Tursiops in the SWAO.…”

Section: Bioaccumulation Of Pollutantsmentioning

confidence: 99%

“…A high hepatic total tin concentration was found in three bottlenose dolphins off the RJ coast (Dorneles et al 2008a), indicating they were exposed to organotin compounds (Table 3). The mean total tin concentration was considered low only when compared to the Guiana dolphin (Sotalia guianensis) from Guanabara Bay (RJ), which is a highly polluted environment (Kjerfve et al, 1997;Dorneles et al, 2007;2008a, b;Lailson-Brito et al, 2010). Organotin compounds have been widely used as antifouling agents in boats and they undergo bioaccumulation through food chains, reaching high concentrations in top predators (Tanabe, 1999).…”

Section: Heavy Metals Southeast Brazilmentioning

confidence: 99%

Report of the Working Group on Interactions between Humans and Tursiops truncatus in the Southwest Atlantic Ocean

Fruet

Zappes

Bisi

et al. 2017

Lat. Am. J. Aquat. Mamm.

View full text Add to dashboard Cite

In this work we compiled the available information about humans and bottlenose dolphin interactions in the Southwest Atlantic Ocean (SWAO), including issues as historical direct takes, incidental captures in fisheries, positive interactions with fisheries, interactions of dolphins with tourism and boat traffic, habitat modification or degradation, and environmental pollution. The data compiled in this review demonstrated that coastal bottlenose dolphins are under anthropogenic pressure in the SWAO. Direct take of bottlenose dolphins in the wild does not appear to be an issue of conservation concern in the SWAO. Although the species is exposed to bioaccumulation of micropollutants, it is suggested that contamination level is lower when compared to bottlenose dolphins from other continents. Coastal works can impact bottlenose dolphin behavior and habitat use in a short-term, but those seem to be reversible when works stop. Bycatch occurs throughout the species distribution and seems to be occasional in Uruguayan and Argentinean waters, where there is evidence of a historic decline in dolphin sightings. In Brazil, bycatch is apparently low in the northeast and southeast coasts, but is frequent in certain areas of southern Brazil. Studies on the subject are scarce or preliminary and a great effort is still required to understand the real impact of human activities on bottlenose dolphins in the SWAO.

show abstract

High organochlorine accumulation in blubber of Guiana dolphin, Sotalia guianensis, from Brazilian coast and its use to establish geographical differences among populations

Cited by 79 publications

References 48 publications

Variation of age and total length in Sotalia guianensis (Van Bénéden, 1864) (Cetacea, Delphinidae), on the coast of Espírito Santo state, Brazil

Variation of age and total length in Sotalia guianensis (Van Bénéden, 1864) (Cetacea, Delphinidae), on the coast of Espírito Santo state, Brazil

Use of carbon and nitrogen stable isotopes to study the feeding ecology of small coastal cetacean populations in southern Brazil

Report of the Working Group on Interactions between Humans and Tursiops truncatus in the Southwest Atlantic Ocean

Contact Info

Product

Resources

About