A Study on Species Compositions and Morphological Changes of the Fish Larvae in Brackishwater

Abstract

A study on species compositions and morphological changes of the fish larvae was conducted for two years and the work was done at the mouth of the Klong Wan Canal; Prachuab Khirikhan Province, and the laboratory of the Faculty of Fisheries, Kasetsart University in Bangkok. From this study, there were at least 34 species but fairly good information was obtained only from the larvae of Chanos chanos, Megalops cyprinoidies and Therapon jarbua. The results were shown in Table 1 and Table 2 in which temperatures and salinity of water during the periods of collections were added. Morphological changes, however, were shown in Plate 1, 2 and 3. The changes of the larvae of Chanos chanos, Megalops cyprinoides, and Therapon jarbua took about 60, 50 and 21 days after collected , respectively.