[MARMAM] New publication on La Plata dolphins (Pontoporia blainvillei)
sotalia at gmail.com
Sat Mar 7 16:08:25 PST 2020
Dear Marmamers, on behalf of all authors I'm sharing this notification on
the publication of a recent investigation on the feeding habits of La Plata
dolphins (Pontoporia blainvillei).
Campos, LB, Lopes, XM, da Silva, E & Santos, MCO. 2020. Feeding habits of
the franciscana dolphins (*Pontoporia blainvillei*) of south-eastern
Brazil. Journal of the Marine Biological Association, UK.
Published online by Cambridge University Press: 27 February 2020
Abstract: This study evaluated the feeding habits of the franciscana
dolphin (Pontoporia blainvillei) in south-eastern Brazil. Stomach contents
were collected from a total of 145 dead specimens found incidentally caught
by fishing vessels or stranded between 2005 and 2015. Fish otoliths,
cephalopod beaks and whole non-digested prey were used for prey species
identification. A total of 9337 prey items were identified, including 26
species of teleost fishes and three species of cephalopods. The most
important prey families were Sciaenidae among fish and Loliginidae among
cephalopods. Franciscana dolphins tended to feed on small fish (mean = 5.25
cm) and cephalopods (mean = 8.57 cm). The index of relative importance
(IRI) showed that Pellona harroweri and Doryteuthis plei were the most
important prey for both males and females. The PERMANOVA test confirmed
that there is no significant difference between the feeding habits of
different sexes, but detected a significant difference among seasons.
Overall, our results show that franciscana dolphins are predominantly
ichthyophagous and non-selective in relation to the type of prey, feeding
on pelagic, demersal and pelagic-demersal prey.
Prof. Marcos Cesar de Oliveira Santos
Laboratorio de Biologia da Conservacao de Mamiferos Aquaticos (LABCMA)
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