[MARMAM] new paper on franciscana dolphin

Silvina Botta silbotta at argentina.com
Sun Aug 29 11:05:21 PDT 2010

Dear Colleagues,

This is to announce a new paper:

Botta, S., Secchi, E.R., Muelbert, M.M.C., Danilewicz, D., Negri, M.F., Cappozzo, H.L. and Hohn, A. 2010. Age and growth of franciscana dolphins,  Pontoporia blainvillei (Cetacea - Pontoporiidae) incidentally caught off southern Brazil and northern Argentina. Journal of the Marine Biological Association of the UK. doi:10.1017/S0025315410001141

Age and length data of 291 franciscana dolphins (Pontoporia blainvillei) incidentally captured on the coast of Rio Grande do
Sul State (RS), southern Brazil, were used to fit growth curves using Gompertz and Von Bertalanffy growth models. A small
sample of franciscanas (N =35) from Buenos Aires Province (BA), Argentina, were used to see if there are apparent growth
differences between the populations. Male and female franciscana samples from both areas were primarily (78–85%) ,4
years of age. The Von Bertalanffy growth model with a data set that excluded animals ,1 year of age provided the best
fit to data. Based on this model, dolphins from the RS population reached asymptotic length at 136.0 cm and 158.4 cm,
for males and females, respectively. No remarkable differences were observed in the growth trajectories of males and
females between the RS and BA populations.

For a copy, you can contact: silbotta at yahoo.com


Silvina Botta

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