제주해역에 서식하는 남방큰돌고래의 공간적 분포와 적합 서식처의 환경적 요인

Title
제주해역에 서식하는 남방큰돌고래의 공간적 분포와 적합 서식처의 환경적 요인
Alternative Title
Environmental predictors of habitat suitability and spatial distribution of Indo-Pacific bottlenose dolphin (Tursiops aduncus) in Jeju waters
Author(s)
안소언; 유신재; 김현우
KIOST Author(s)
Ahn, Soeon(안소언)
Publication Year
2017-09-29
Abstract
The Indo-Pacific bottlenose dolphin population in Jeju waters is resident in the region and its size is estimated to 100-110 individuals. To conserve this endangered species, the urgent challenge is to understand their habitatrange and habitat preference well enough to maintain this population in the face of the pressures resulting from environmental changes. The aim of this study is to use species distribution models to investigate the distribution of Tursiops aduncus and the effects of environmental variables on the habitat suitability of this species. We compiled interannual dataset (2004-2016) comprised of annual cetacean sighting data from Cetacean Research Institute and Jeju National University. We selected environmental variables such as mean SST, salinity, pH and water depth which are likely to be primary drivers for dolphin distribution and these were obtained from Bio-Oracle global environmental data packages (5 arcmin) and the General Bathymetric Chart of the Oceans (GEBCO) dataset. The result indicated that water depth was a main driver to affect the distribution of Indo-Pacific bottlenose dolphin. Therefore, the area of northern part of Jeju coast waters was predicted to be a highly suitable habitat. Maxentmodel generated for Tursiops aduncus returned the area under the ROC curve (AUC) values higher than 0.9.tat preference well enough to maintain this population in the face of the pressures resulting from environmental changes. The aim of this study is to use species distribution models to investigate the distribution of Tursiops aduncus and the effects of environmental variables on the habitat suitability of this species. We compiled interannual dataset (2004-2016) comprised of annual cetacean sighting data from Cetacean Research Institute and Jeju National University. We selected environmental variables such as mean SST, salinity, pH and water depth which are likely to be primary drivers for dolphin distribution and these were obtained from Bio-Oracle global environmental data packages (5 arcmin) and the General Bathymetric Chart of the Oceans (GEBCO) dataset. The result indicated that water depth was a main driver to affect the distribution of Indo-Pacific bottlenose dolphin. Therefore, the area of northern part of Jeju coast waters was predicted to be a highly suitable habitat. Maxentmodel generated for Tursiops aduncus returned the area under the ROC curve (AUC) values higher than 0.9.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23798
Bibliographic Citation
2017 PICES Annual meeting, pp.28, 2017
Publisher
PICES
Type
Conference
Language
English
Publisher
PICES
Related Researcher
Research Interests

Marine envrionment,Marine biology,해양환경,해양생물

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