St Andrews Research Repository

St Andrews University Home
View Item 
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  • Register / Login
JavaScript is disabled for your browser. Some features of this site may not work without it.

Estimating survival and abundance in a bottlenose dolphin population taking into account transience and temporary emigration

Thumbnail
View/Open
Silva2009MarEcolProgSer392p263.pdf (187.9Kb)
Date
2009
Author
Silva, Mónica
Magalhães, S
Prieto, R
Santos, RS
Hammond, Philip Steven
Keywords
Pollock’s robust design
Open models
Abundance
Survival
Transience
Temporary emigration
Capture-recapture data
Bottlenose dolphins
QL Zoology
SDG 10 - Reduced Inequalities
Metadata
Show full item record
Abstract
Knowledge of demographic parameters of most cetacean populations is scarce because of problems associated with sampling open populations of wide-ranging animals. In recent years, capture–recapture models have been developed to address these problems. We used a photo-identification dataset collected from a population of bottlenose dolphins Tursiops truncatus between 1999 and 2004 around 2 islands of the Azores archipelago, to demonstrate the use of some of these methods. A variety of open models and Pollock’s robust design were applied to estimate population size, survival probability and emigration rates. Using only the estimates with the lowest coefficients of variation, the annual abundance of adult dolphins varied between 202 (95% CI: 148 to 277) and 334 (95% CI: 237 to 469), according to the Jolly-Seber method, and between 114 (95% CI: 85 to 152) and 288 (95% CI: 196 to 423), according to the robust design. The number of subadult individuals varied from 300 (95% CI: 232 to 387) to 434 (95% CI: 316 to 597) based on the Jolly-Seber method. The open models yielded estimates of adult survival (0.970 ± 0.029 SE) that were significantly higher than those for subadults (0.815 ± 0.083 SE). Movement patterns of dolphins in the Azores seem to follow a Markovian model, in which dolphins seen in the study area in 1 yr show higher probability of emigrating in the following year. Despite some limitations, this is the first study to model transience and temporary emigration in a dolphin population.
Citation
Silva , M , Magalhães , S , Prieto , R , Santos , RS & Hammond , P S 2009 , ' Estimating survival and abundance in a bottlenose dolphin population taking into account transience and temporary emigration ' , Marine Ecology Progress Series , vol. 392 , pp. 263-276 . https://doi.org/10.3354/meps08233
Publication
Marine Ecology Progress Series
Status
Peer reviewed
DOI
https://doi.org/10.3354/meps08233
ISSN
0171-8630
Type
Journal article
Rights
Copyright © 2009 Inter-Research.
Collections
  • University of St Andrews Research
URL
http://www.scopus.com/inward/record.url?scp=70350348691&partnerID=8YFLogxK
URI
http://hdl.handle.net/10023/4107

Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

Advanced Search

Browse

All of RepositoryCommunities & CollectionsBy Issue DateNamesTitlesSubjectsClassificationTypeFunderThis CollectionBy Issue DateNamesTitlesSubjectsClassificationTypeFunder

My Account

Login

Open Access

To find out how you can benefit from open access to research, see our library web pages and Open Access blog. For open access help contact: openaccess@st-andrews.ac.uk.

Accessibility

Read our Accessibility statement.

How to submit research papers

The full text of research papers can be submitted to the repository via Pure, the University's research information system. For help see our guide: How to deposit in Pure.

Electronic thesis deposit

Help with deposit.

Repository help

For repository help contact: Digital-Repository@st-andrews.ac.uk.

Give Feedback

Cookie policy

This site may use cookies. Please see Terms and Conditions.

Usage statistics

COUNTER-compliant statistics on downloads from the repository are available from the IRUS-UK Service. Contact us for information.

© University of St Andrews Library

University of St Andrews is a charity registered in Scotland, No SC013532.

  • Facebook
  • Twitter