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Design, construction, and use of a new light trap for sampling larval coral reef fishes
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2006
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Description:"A variety of methods have been developed in order to sample the larval stages of marine fishes, including towed nets (Tucker, 1951; Miller, 1961; McGowan and Brown, 1966; Weibe et al., 1976; Methot, 1988), purse-seines (Kingsford and Choat, 1985), channel nets (Shenker et al., 1993), crest nets (Dufour and Galzin, 1993), settlement coils (Leis et al., 2002), and light traps (Doherty, 1987). However, light traps have become the preferred gear for many who work in tropical reef environments, especially when live specimens of late stage larvae are needed for grow-out (Doherty, 1994; Doherty et al., 1994; Hair and Doherty, 2003; Watson et al., 2001), behavioral (Leis et al., 1996; Stobutzki and Bellwood, 1994; Stobutzki and Bellwood, 1997), or tagging work (Watson et al., 2002). The high quality of the condition of specimens collected by light traps is also an important consideration when the material is used in construction of developmental series for taxonomic work, for identification of new characters for phylogenetic analysis, and sources of material for otolith-based ageing and microchemical analyses. Light traps also offer some additional advantages over the more traditional methods that rely on towed nets by allowing workers to sample multiple locations simultaneously (Wolanski et al., 1997; Doherty and Carleton, 1997; Carleton et al., 2001), make collections in areas where it is impractical to pull a net (Brogan, 1994; Dennis et al., 1991; Hernandez and Shaw, 2003; Strydom, 2003), and sample older larvae which, due to net avoidance, are usually under represented (Doherty, 1987; Gregory and Powles, 1988; Choat et al., 1993; Hickford and Schiel, 1999). The latter should be of particular concern when sampling the oligotrophic waters surrounding coral reefs, as gear avoidance by larval fishes has been shown to be a function of water clarity (Brander and Thompson, 1989)"--Introduction.
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