Dear colleagues,

on behalf of my co-authors, I am pleased to announce our most recent
publication:


Bezamat C, Simões-Lopes PC, Castilho PV, Daura-Jorge FG. 2018. The
influence of cooperative foraging with fishermen on the dynamics of a
bottlenose dolphin population. Marine Mammal Science,
doi:10.1111/mms.12565.

https://onlinelibrary.wiley.com/doi/10.1111/mms.12565


Abstract

Recent years have seen an increasing interest in individual behavioral
variation. However, the implications of such variation for population
dynamics are often unknown. We studied the dynamics of a bottlenose dolphin
(*Tursiops truncatus gephyreus*) population from southern Brazil, where
some individuals forage cooperatively with artisanal fishermen. We fitted
mark‐recapture models to 10 yr of photo‐identification data to investigate
the influence of this foraging specialization on dolphins’ population
parameters, controlling for sex and ranging behavior. We estimated adult
survival to be high (0.949 ± 0.015 SE), weakly influenced by home range
size, sex or the frequency of interaction with fishermen. The slightly
higher survival probability for individuals with smaller home ranges could
stem from the benefits of reduced spatial requirements implied by the
specialized foraging. Foraging also influenced the probability of
resighting individuals, and there was no temporary or permanent emigration.
Abundance fluctuated slightly over the years from 54 (95% CI = 49–59) to 60
(95% CI = 52–69) individuals, with no evident population trend. Despite
such apparent population stability, we confirm this population remains
small and geographically isolated which may threaten its viability and the
viability of its unusual, localized foraging specialization. Our study also
illustrates how accounting for individual variation can portray animal
population dynamics more realistically.


If you have any questions or comments about the publication, please contact
me at: [email protected]


Cheers,


MSc Carolina Bezamat

PhD candidate

Laboratório de Mamíferos Aquáticos (LAMAq)

Departamento de Ecologia e Zoologia

Universidade Federal de Santa Catarina

Brazil
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