Diet of the bottlenose dolphin (Tursiops truncatus, Montagu 1821) in the northeastern Adriatic Sea

Sprčić, Alena (2011) Diet of the bottlenose dolphin (Tursiops truncatus, Montagu 1821) in the northeastern Adriatic Sea. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

Bottlenose dolphins (Tursiops truncatus) are the only regular component of the Adriatic Sea cetacean fauna. They are opportunistic feeders, consuming fish, cephalopods and crustaceans depending on abundance and ability. Stomach content of 9 bottlenose dolphins stranded in the period 1.1.2006 – 31.12.2008 in Cres-Lošinj archipelago were analyzed. Identification of the prey was based on the morphological differences of sagittal otoliths of teleost fish and Cephalopod beaks present inside the stomachs. A reference catalogue was made for purpose of this study, which facilitated analysis and reduced the possibility of misidentification of prey. The aim of the study was to determine on which prey species dolphins of this area feed. The prey inhabits all water layers. On the family level most numerous fish are Sparidae,and the most abundant species is hake (Merluccius merluccius). The most numerous Cephalopod orders are Octopoda and Teuthoidea. These data are consistent with results of other studies on diet habits of this species in the Mediterranean Sea.

Item Type: Thesis (Diploma thesis)
Keywords: Bottlenose dolphin, Tursiops truncatus, diet, otoliths
Supervisor: Mustafić, Perica
Date: 2011
Number of Pages: 27
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Grozdana Sirotic
Date Deposited: 07 Jul 2014 11:23
Last Modified: 18 Sep 2014 10:52
URI: http://digre.pmf.unizg.hr/id/eprint/2444

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