Reproduction ecology of an emerging fishery resource, the amphibious mudskipper Periophthalmus chrysospilos, in the Mekong Delta

The Gold-Spotted mudskipper Periophthalmus chrypsospilos is a potential aquarium pet living in the mudflats in coastal and estuarine regions, but populations of this mudskipper within the Mekong Delta are facing extirpation risks due to indiscriminate harvesting for the growing aquarium and food-fish trade. Consequently, this research aims to provide first reproductive references such as spawning type and season, length at first mature, batch fecundity, being used in conservation and artificially propagation research. Analysis results from 1,031 individuals (523 males and 508 females) reveal that the sex ratio of total individuals recorded is 1:1 (523 males and 508 females) (c2=0.22, p=0.64). The GSI values are found to exhibit a non-normal distribution (Shapiro-Wilk Test, NJ=0.87, p<0.01) and change by gender (Mann-Whitney U, Z=27.04, p<0.01), season (Z=6.17, p<0.01) and site (Kruskal-Wallis H, c2=40.72, p<0.01).  A combination of GSIs and the monthly appearance of mature g...