Journal
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM
Volume 90, Issue 8, Pages 1493-1500Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0025315410001141
Keywords
franciscana; Pontoporia blainvillei; growth; age estimation; South America; dolphin; Cetacea
Categories
Funding
- Fundo Nacional do Meio Ambiente (FNMA)
- Yaqu Pacha Foundation
- Coordenacao de Aperfeicoamento de Pessoal em Ensino Superior (PEC-PG-CAPES)
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available