Population size estimate of Indo-Pacific bottlenose dolphins in the Algoa Bay region, South Africa
Population size estimate of Indo-Pacific bottlenose dolphins in the Algoa Bay region, South Africa
This study estimates the population size of Indo-Pacific bottlenose dolphins (Tursiops aduncus) in the Algoa Bay region on the Eastern Cape coast of South Africa. Mark-recapture analyses were performed on photo-identification data collected on 54 occasions during a 3-yr-study period. Using a photographic data set of over 10,000 ID-images, 1,569 individuals were identified, 131 of which were photographed on more than one occasion. Using the POPAN formulation in the software program MARK, a total population of approximately 28,482 individuals (95% CI = 16,220-40,744; CV = 0.220), was estimated (estimate corrected for the proportion of distinctive individuals in the population). This is the largest population estimate to date for this species along the South African coast, suggesting that the bottlenose dolphins inhabiting the Algoa Bay region represent part of a substantially larger population that ranges along a considerable length of the South African coast.
Algoa Bay-Eastern Cape-South Africa, Indo-Pacific bottlenose dolphin, Mark-recapture analyses, Population estimate, Tursiops aduncus
86-97
Reisinger, Ryan R.
4eaf9440-48e5-41fa-853f-d46457e5444e
Karczmarski, Leszek
8f73374b-d547-4f60-a3b7-7cd4d4bcc519
January 2010
Reisinger, Ryan R.
4eaf9440-48e5-41fa-853f-d46457e5444e
Karczmarski, Leszek
8f73374b-d547-4f60-a3b7-7cd4d4bcc519
Reisinger, Ryan R. and Karczmarski, Leszek
(2010)
Population size estimate of Indo-Pacific bottlenose dolphins in the Algoa Bay region, South Africa.
Marine Mammal Science, 26 (1), .
(doi:10.1111/j.1748-7692.2009.00324.x).
Abstract
This study estimates the population size of Indo-Pacific bottlenose dolphins (Tursiops aduncus) in the Algoa Bay region on the Eastern Cape coast of South Africa. Mark-recapture analyses were performed on photo-identification data collected on 54 occasions during a 3-yr-study period. Using a photographic data set of over 10,000 ID-images, 1,569 individuals were identified, 131 of which were photographed on more than one occasion. Using the POPAN formulation in the software program MARK, a total population of approximately 28,482 individuals (95% CI = 16,220-40,744; CV = 0.220), was estimated (estimate corrected for the proportion of distinctive individuals in the population). This is the largest population estimate to date for this species along the South African coast, suggesting that the bottlenose dolphins inhabiting the Algoa Bay region represent part of a substantially larger population that ranges along a considerable length of the South African coast.
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Published date: January 2010
Keywords:
Algoa Bay-Eastern Cape-South Africa, Indo-Pacific bottlenose dolphin, Mark-recapture analyses, Population estimate, Tursiops aduncus
Identifiers
Local EPrints ID: 469035
URI: http://eprints.soton.ac.uk/id/eprint/469035
ISSN: 0824-0469
PURE UUID: dafd7f21-a633-4019-8ab5-8fd89fc0712c
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Date deposited: 05 Sep 2022 16:57
Last modified: 17 Mar 2024 04:08
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Author:
Leszek Karczmarski
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