期刊
AQUATIC LIVING RESOURCES
卷 31, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/alr/2018006
关键词
Aquarium trade; Amphiprion percula; Premnas biaculeatus; Papua New Guinea; management; consumer demand
资金
- Australian Centre for International Agriculture Research (ACIAR)
- National Fisheries Authority (NFA) through ACIAR project Mariculture Development in New Ireland, Papua New Guinea [FIS/2010/054]
As fish stocks become depleted, exploitation eventually fails to be cost-efficient. However, species or morphs of species can suffer from continual exploitation if their rarity results in increased value, justifying the cost-efficiency of targeted or opportunistic exploitation. The trade in coral reef fishes for public and private aquaria is an industry in which naturally rare species and rare morphs of species command high prices. Here we investigate the relationship between price and the natural prevalence of colour morphs of two highly demanded clownfish species using a localised case study. The export prices for colour morphs increased with decreasing prevalence of occurrence (y = 4.60x(-0 51), R-2 = 0.43), but price increase was inversely less than the observed reduction in prevalence. This renders rare colour morphs (i.e., those at relatively low prevalence) at risk of opportunistic exploitation. Using ecological data, we also demonstrate how this increased value can subject rare colour morphs with aggregated distributions to targeted exploitation. These findings are discussed in relation to the broader marine aquarium trade, identifying taxa potentially at risk from exploitation motivated by rarity and addressing potential management strategies.
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