Assessing the growth rate of endangered Franciscana dolphin in Argentina, South America

Cetacean populations are vulnerable to decline due to anthropogenic threats and life history traits. The Franciscana dolphin (Pontoporia blainvillei) has been considered the most affected small dolphin in the Southwestern Atlantic Ocean. In this study a method is presented for estimating the growth...

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Bibliographic Details
Published in:Regional studies in marine science 2020-11, Vol.40, p.101479, Article 101479
Main Authors: Cáceres, Manuel O., Cáceres-Saez, Iris, Secchi, Eduardo R., Negri, M. Fernanda, Panebianco, M. Victoria, Cappozzo, H. Luis
Format: Article
Language:English
Subjects:
Bycatch
Cetaceans
Growth rate
Incidental mortality
Leslie’s approach
Population dynamics
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Summary:Cetacean populations are vulnerable to decline due to anthropogenic threats and life history traits. The Franciscana dolphin (Pontoporia blainvillei) has been considered the most affected small dolphin in the Southwestern Atlantic Ocean. In this study a method is presented for estimating the growth rate of the Franciscana dolphin affected by incidental mortality (bycatch) in coastal marine areas of Argentina, South America. We used a general approach based on vital parameters information such as reproductive rates and survival probabilities for an age-structured population. The Franciscana’s growth rate was estimated using Leslie’s approach through an algorithm implemented in a 14 × 14 matrix model. Then, the population was characterized analysing the discrete-time evolution of the age–population vector. We found that the potential growth rate
ISSN:2352-4855
2352-4855
DOI:10.1016/j.rsma.2020.101479