期刊
MARINE POLLUTION BULLETIN
卷 86, 期 1-2, 页码 111-121出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2014.07.035
关键词
Cage fish farming; Stable isotope; Damselfish; Pelagic food chain; Pomacentrus vaiuli; Chromis margaritifer
资金
- National Science Council of the Republic of China [NSC93-2311-B-001-051, 93-2621-B-001-005, 96-2621-B-001-009-MY3]
- Biodiversity Research Center, Academia Sinica
To assess the effect of cage fish-farming on the coral reef ecosystem off Xiaoliuchiu Island, southern Taiwan, geographical differences in the food chain of each of two damselfishes, Pomacentrus vaiuli and Chromis margaritifer, were examined using a stable-isotope approach. For each damselfish, individuals were found to consume similar foods at all sites. However, specimens collected at sites near the cage farm (as the experimental sites) exhibited lower delta C-13 and higher delta N-15 signatures compared to those from reference sites. Similar trends also occurred in the zooplankton and detritus, two major food sources for both damselfishes. This finding indicates that particulate organic matter released by the farm may have entered the coral reef ecosystem through the pelagic food chain. Artificial reef emplacement is recommended to provide extra habitats under cage farms to support additional pelagic-feeding fish populations, thereby reducing environmental impacts of cage farming on coral reefs. (C) 2014 Elsevier Ltd. All rights reserved.
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