IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Environmental predictors of habitat suitability and biogeographical range of Franciscana dolphins (Pontoporia blainvillei)
Gomez, J.J.; Cassini, M.H. (2015). Environmental predictors of habitat suitability and biogeographical range of Franciscana dolphins (Pontoporia blainvillei). Global Ecology and Conservation 3: 90-99. hdl.handle.net/10.1016/j.gecco.2014.11.007
In: Global Ecology and Conservation. Elsevier: Amsterdam. ISSN 2351-9894, more
Peer reviewed article  

Available in Authors 

Keyword
    Marine
Author keywords
    Species distribution model; Marine mammal; Temperature; Salinity; Food preference

Authors  Top 
  • Gomez, J.J.
  • Cassini, M.H.

Abstract
    The aim of this study was to use species distribution models to estimate the effects of environmental variables on the habitat suitability of river dolphins Pontoporia blainvillei (franciscanas) along their overall biogeographical distribution. Based on the literature, we selected six environmental variables to be included in the models; four climatic factors (surface sea temperature, salinity, turbidity and productivity) and two biotic factors (prey availability and fishing effort). We determined that the biographic range is under the following limits: temperature less than 19°C, a salinity of 36 psu and a minimal probability of the occurrence of fish C. guatucupa of 0.297. In the discussion, we postulate hypotheses on the behavioural and physiological mechanisms that cause these associations between environmental predictors and Franciscanas distribution. There was a good fit between the distribution predicted by the species distribution model and the one proposed by the experts of the International Union for Conservation of Nature; however, our analysis failed to highlight the fundamental role of bycatch as the main threat to this dolphin species.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors