Scientia Marina, Vol 70, No S2 (2006)

Individual-based dispersal patterns of larval gobies in an estuary as indicated by otolith elemental fingerprints


https://doi.org/10.3989/scimar.2006.70s2165

Mei-Yu Chang
Institute of Fisheries Sciences, College of Life Science, National Taiwan University, Taipei, Taiwan R.O.C., Taiwan, Province of China

Chia-Hui Wang
Institute of Biodiversity, National Cheng Kung University, Tainam, Taiwan R.O.C., Taiwan, Province of China

Chen-Feng You
Department of Earth Sciences, National Cheng Kung University, Tainan, Taiwan R.O.C., Taiwan, Province of China

Wann-Nian Tzeng
Institute of Fisheries Sciences, College of Life Science, National Taiwan University, Taipei, Taiwan R.O.C., Taiwan, Province of China

Abstract


Otolith trace elements were used as natural tags to study the dispersal patterns of goby larvae in an estuary. Ninety-six larval gobies representing 10 species were collected in the estuary of Gongshytyan Creek in northwestern Taiwan in September 1997. Fifteen trace elements in fish otoliths were analysed with solution-based ICPMS. Trace elemental composition in otoliths differed significantly among the species. Habitat use by the larvae of the 10 species can be divided into four groups, based on principal component analysis of otolith elemental composition. All 10 goby species used the estuary as a nursery area irrespective of the fish being amphidromous or non-amphidromous. A part of the population may be lost during larval dispersal, as indicated from trace elemental composition recorded in the otolith.

Keywords


trace element; otolith; gobies; ICPMS; estuary; larval dispersal

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