Spinner dolphinsStenella longirostrisoff south-west Mauritius: abundance and residency

Autor:	VG Cockcroft, Imogen Webster, Adèle Cadinouche
Rok vydání:	2015
Předmět:	Mark and recapture Fishery Identification rate education.field_of_study Abundance (ecology) Stenella longirostris biology.animal Photo identification Population Aquatic Science Biology education Ecology Evolution Behavior and Systematics
Zdroj:	African Journal of Marine Science. 37:115-124
ISSN:	1814-2338 1814-232X
DOI:	10.2989/1814232x.2015.1017004
Popis:	Spinner dolphins Stenella longirostris longirostris off the south-west coast of Mauritius are subject to ongoing anthropogenic disturbance in the form of daily dolphin tourism, which has intensified since 1998. Abundance of this species was estimated using photo-identification data and mark-recapture analysis. Between April 2008 and June 2010, identification photographs were collected from dolphins occurring along a 30 km length of the coast of south-west Mauritius. A total of 250 groups were encountered over 229 survey days. Mark-recapture analyses were performed on a photographic dataset of more than 8 000 good- and excellent-quality images and 83 animals were identified as distinctively marked individuals. The majority (85.5%) were seen more than once and resightings indicated a resident population. The compiled version of SOCPROG 2.4 was used to investigate the lagged identification rate. The fitted model supported a mostly resident population with additional animals moving in and out of the study are...
Databáze:	OpenAIRE
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