[MARMAM] New publication: Steno bredanensis in shallow waters of southeastern Brazil

Rafael Ramos de Carvalho carvalho.ramos at yahoo.com.br
Fri Nov 6 13:04:53 PST 2020


 

Dear colleagues,

My co-authors and I are pleased to share our recentpublication in Marine Mammal Science:

Carvalho RR, Lailson-Brito J Jr., Kajin M, et al.Shallow-water habitat use and population parameters of rough-toothed dolphins, Stenobredanensis (G. Cuvier in Lesson, 1828) in southeastern Brazil. Mar Mam Sci.2020;1–16.


The publication is available through the followinglink: http://dx.doi.org/10.1111/mms.12762

 Abstract
The rough-toothed-dolphin (Steno bredanensis) is a poorly known species along its distributionespecially in the Southern hemisphere where data on habitat use and populationparameters are scarce. Boat-based surveys were conducted from 2009 to 2017 in ashallow water environment in southeastern Brazil. During focal-groupobservations, S. bredanensis was morecommonly found in mean depths of 22 m with varying group size and composition.Generalized additive models showed that group size was influenced byenvironmental variables such as sea surface and bottom temperatures, depth andseason. Photo-identification effort allowed us to catalogue 173 well distinctmarked individuals. Population parameters estimate showed high and constantsurvival (Φ = 0.99) corroborating site fidelity but time varyingcapture probabilities (p = 0.03 – 0.71). Open population model also indicated asmall abundance estimate (Nt = 218)of S. bredanensis in the study areaimproving knowledge for this species in shallow water environments of theSouthwestern Atlantic Ocean.

Kind regards,
Rafael Carvalho
--  

BiólogoDoutor em Ecologia e Evolução-PPGEE/UERJ Laboratório de Mamíferos Aquáticos e Bioindicadores "Izabel Gurgel" - MAQUA Faculdade de Oceanografia Universidade do Estado do Rio de Janeiro - UERJ  tel.: (21) 2334-0065 / 2334-0795 cel.: (21) 99802-3536http://lattes.cnpq.br/6546679825444246


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