[MARMAM] New publication about harbour porpoises habitat use and interspecific competition
Bruno Diaz Lopez
bruno at thebdri.com
Fri Apr 27 08:23:12 PDT 2018
My co-author Séverine Methion and I are pleased to announce our new publication:
Bruno Díaz López & Séverine Methion (2018) Does interspecific competition drive patterns of habitat use and relative density in harbour porpoises? Marine Biology (2018) 165:92. http://doi.org/10.1007/s00227-018-3345-8
Determining the drivers that are responsible for the ﬁne-scale distribution of cetacean species is fundamental to understand better how they respond to changes in their environment. We utilized information theoretic approach to carry out a compre-hensive investigation of the key environmental and anthropogenic correlates of habitat use and relative density of harbour porpoises. In all, 273 daily boat surveys over a period of 38 months, between April 2014 and November 2017, were spent in the ﬁeld monitoring 9417 km along the coastal and shelf waters of Northwest Spain. Throughout this period, there were 70 encounters with harbour porpoises and 712 encounters with common bottlenose dolphins. The observed unequal use of available habitat indicates that harbour porpoises present a ﬁne-scale pattern of habitat selection along the study area, which is likely related to the variation in oceanographic variables and human disturbance mainly caused by marine traﬃc and ﬁsheries. While diﬀerences in habitat use between harbour porpoises and bottlenose dolphins were observed, interspeciﬁc competition with bottlenose dolphins (as competitive exclusion hypotheses) did not appear to play an important role in the distribution and relative density of harbour porpoises. These ﬁndings highlight the importance of considering both environmental and anthropogenic variables in ecological studies, in addition to highlighting the importance of using a multi-species ecology approach in research and conservation management planning.
A read-only version of the paper is available here: https://rdcu.be/MItq
Please do not hesitate to ask me for any question regarding our study or to request a PDF copy of the article: bruno at thebdri.com
Bruno Díaz López Ph.D
Chief biologist and Director
The Bottlenose Dolphin Research Institute BDRI
Avenida Beiramar 192, O Grove 36980, Pontevedra, Spain
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