Abstract
ABSTRACTThe six Naupliar, three Protozoea, three Mysis and first post-larval forms of the western school prawn Metapenaeus dalli Racek, 1957 were cultured in the laboratory. These stages were described in detail and compared to those of other metapenaeids. The ontogenetic development occurred in 12 days at 26°C, with both the growth rate and morphological patterns of development in M. dalli broadly following those recorded for other metapenaeids. Differences were found between M. dalli and other metapenaeids at corresponding stages of larval development, with these being the number, location and composition of individual setae and other minor spinal development.
Highlights
The morphological development of many of the ~29 metapenaeid species, which occur exclusively throughout the Indo-West Pacific (De Grave and Fransen 2011; De Grave 2014 ), have yet to be fully described
The larval development of M dalli can be subdivided into six Naupliar, three Protozoea and three Mysis stages before individuals metamorphose into the post-larval form
This ontogenetic development occurs in ~12 days at 26°C, with both the growth rate and morphological patterns of development in M. dalli described here showing, at a broad level, similarity among congeners
Summary
The morphological development of many of the ~29 metapenaeid species, which occur exclusively throughout the Indo-West Pacific (De Grave and Fransen 2011; De Grave 2014 ), have yet to be fully described. Milne Edwards, 1837 (Lakra et al 2010) and Metapenaeus dobsoni Miers, 1878 (Mishra et al 2009), this method requires the taxonomic identification of reference stock prior to development of genetic markers. Historical literature is often inconsistent in its reporting of the larval metapenaeid taxonomy required for such identifications. Species such as Metapenaeus ensis De Haan, 1844 (Leong et al 1992; Ronquillo and Saisho 1993), Metapenaeus joyneri Miers, 1880 (Lee and Lee 1968), Metapenaeus macleayi Haswell, 1879 (Preston 1985), Metapenaeus bennettae Racek & Dall, 1965 (Preston 1985) and Metapenaeus brevicornis H. Characterising larval development in detail is crucial both for developing and comparing aquaculture rearing techniques and distinguishing between congeners with overlapping geographical distributions (Rothlisberg et al 1983; Jackson and Rothlisberg 1994)
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