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Title: The biology and ecology of small tropical scorpaenoids inhabiting shallow coastal habitats in Singapore
Keywords: Biology, Ecology, Small scorpaenoids, Coastal, Singapore
Issue Date: 29-Aug-2011
Source: KWIK TEIK BENG, JEFFREY (2011-08-29). The biology and ecology of small tropical scorpaenoids inhabiting shallow coastal habitats in Singapore. ScholarBank@NUS Repository.
Abstract: Life history theory predicts a range of generic responses in life history traits with increasing organism size, among the most important of which are relationships between body size and growth, mortality and life span. Size-dependent bias in global extinction risk has recently been identified in fishes, with smaller fish thought to be at greater risk from habitat degradation. Potential relationships between body size, local extinction and ecological and life-history traits were investigated in common scorpaenoids inhabiting local coastal habitats. Sympatry in Paracentropogon longispinis and Trachicephalus uranoscopus is likely to be supported by partitioning of food resources, which may also have contributed to slightly disparate growth trajectories. Although some differences in growth and reproductive biology were detected between the two small species P. longispinis, T. uranoscopus and the larger Synanceia horrida, similarities in growth rates appeared to be associated with size-dependent life history strategies, while reproductive timing was associated with optimum conditions for larval survivorship during the northeast monsoonal season. Moreover, variations in life history tactics in both the small tropical scorpaenoids appeared to be associated with increased survivorship from either better physiological tolerances or defensive potentials, and occurred for both juveniles and adults inhabiting shallow estuarine habitats that are challenging habitats for many other fish species. The findings are discussed in terms of implications for risk of local extinction/vulnerability, and life history strategy adaptations along coastal habitats, given the rapid rate of coastal development in Singapore.
Appears in Collections:Ph.D Theses (Open)

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