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Milk composition of franciscana dolphin (Pontoporia blainvillei) from Rio Grande do Sul, southern Brazil

Published online by Cambridge University Press:  17 March 2008

Glauco Caon ,
Eduardo Resende Secchi ,
Edison Capp  and
Luiz Carlos Kucharski
Glauco Caon*
Affiliation:
Laboratório de Metabolismo e Endocrinologia Comparada, Departamento de Fisiologia, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite 500, 2° andar, Campus Centro, 90050-170, Porto Alegre, RS, Brazil Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul, R. Felipe Neri, 382 cj. 203, 90550-190, Bairro Auxiliadora, Porto Alegre, RS, Brazil
Eduardo Resende Secchi
Affiliation:
Laboratório de Tartarugas e Mamíferos Marinhos, Departamento de Oceanografia, Fundação Universidade Federal do Rio Grande—FURG, Cx. Postal 474, Rio Grande—RS, 96200-970, Brazil Laboratório de Mamíferos Marinhos, Museu Oceanográfico ‘Prof. E.C. Rios’—FURG, Cx. Postal 379, Rio Grande—RS, 96200-970, Brazil
Edison Capp
Affiliation:
Laboratório de Ginecologia e Obstetrícia, Hospital de Clínicas de Porto Alegre, Departamento de Ginecologia e Obstetrícia—FAMED/UFRGS, Porto Alegre, RS, Brazil
Luiz Carlos Kucharski
Affiliation:
Laboratório de Metabolismo e Endocrinologia Comparada, Departamento de Fisiologia, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite 500, 2° andar, Campus Centro, 90050-170, Porto Alegre, RS, Brazil
*
Correspondence should be addressed to: Glauco Caon, Laboratório de Metabolismo e Endocrinologia Comparada, Departamento de Fisiologia, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite 500, 2° andar Campus Centro, 90050-170, Porto Alegre, RS, Brazil email: [email protected]
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Abstract

Milk is the only external energy source for mammals in their early stages of life. Its composition varies during lactation in baleen whales and pinnipeds, while only descriptive studies are available for odontocetes. The aim of this work was to identify the components of the milk of franciscana, Pontoporia blainvillei, from southern Brazil. Samples were manually collected from lactating females (N = 5) incidentally caught in the gill-net fishery. The amount of fat, protein, carbohydrate, mineral and trace metal content, and caloric value of the samples were estimated. Milk of the franciscana dolphin presented mean fat, protein and carbohydrate concentrations similar to those described for other coastal species. A significant increase in fat concentration was observed in winter months, with a higher energy density. Potassium was the mineral found in higher amounts. Zinc, mercury and copper were detected in low concentrations. Due to different habitat conditions along the species distribution, the presence of a highly seasonal reproductive period and inter-population genetic variability, studies on milk composition in other areas is recommended.

Keywords

milk compositionminerals, contaminantsfranciscanaPontoporia blainvilleiBrazil
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 88 , Special Issue 6: Marine Mammals , September 2008 , pp. 1099 - 1101
Copyright
Copyright © Marine Biological Association of the United Kingdom 2008

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References

REFERENCES

AOAC (1975) Official methods of analysis of the AOAC, 10th edn.Washington DC: Association of Official Analytical Chemists.Google Scholar
AOAC (1990) Official methods of analysis of the AOAC, 15th edn.Washington DC: Association of Official Analytical Chemists.Google Scholar
AOAC (1995) Official methods of analysis of the AOAC, 16 edn.Washington DC: Association of Official Analytical Chemists.Google Scholar
Chaplin, M.F. (1986) Monosaccharides. In Chaplid, M.F. and Kennedy, J.F. (eds) Carbohydrate analysis. Oxford: IRL Press, pp. 1–36.Google Scholar
Danilewicz, D. (2003) Reproduction of female franciscana (Pontoporia blainvillei) in Rio Grande do Sul, southern Brazil. Latin American Journal of Aquatic Mammals 2, 67–78.CrossRefGoogle Scholar
Frodello, J.P., Viale, D. and Marchand, B. (2002) Metal concentrations in the milk and tissues of a nursing Tursiops truncatus female. Marine Pollution Bulletin 44, 551–576.CrossRefGoogle ScholarPubMed
Oftedal, O.T. (1997) Lactation in whales and dolphins: evidence of divergence between baleen- and toothed-species. Journal of Mammary Gland Biology and Neoplasia 2, 205–230.CrossRefGoogle ScholarPubMed
Peddemors, V.M., Muelenaere, H.J.H. and Devchand, K. (1989) Comparative milk composition of the bottlenosed dolphin (Tursiops truncatus), humpback dolphin (Souza plumbea) and common dolphin (Delphinus delphis) from Southern African waters. Comparative Biochemistry and Physiology 94A, 639–641.CrossRefGoogle Scholar
Rosas, F.C.W. and Lehti, K.K. (1996) Nutritional and mercury content of milk of the Amazon River Dolphin, Inia geoffrensis. Comparative Biochemistry and Physiology 115A, 117–119.CrossRefGoogle Scholar
Secchi, E.R., Danilewicz, D. and Ott, P.H. (2003) Applying the phylogeographic concept to identify franciscana dolphin stocks: implications to meet management objectives. Journal of Cetacean Research and Management 5, 61–68.Google Scholar
Secchi, E.R., Ott, P.H. and Danilewicz, D. (2002) Report of the Fourth Workshop for the Coordinated Research and Conservation of the Franciscana Dolphin (Pontoporia blainvillei) in the Western South Atlantic. Latin American Journal of Aquatic Mammals (Special Issue) 1, 11–20.Google Scholar