Abundance and Composition of Fish Larvae in the Southern Indian Ocean of Java and its Environmental Aspects
Muhammad Taufik(1), Yoke Hany R(2), Thomas Hidayat(1), Asep Makmun(3), Nurulludin(1), Karsono Wagiyo(1), Anthony Sisco P(1), Prihatiningsih(1)

1)Research Center for Fishery, National Research and Innovation Agency.
2)Research Center for Oceanography, National Research and Innovation Agency.
3)Faculty of Marine Science and Fisheries, Raja Ali Haji Maritime University.

Abstract

The study of ichthyoplankton regarding the abundance and distribution of fish larvae is important to study because the mortality it experiences greatly affects the success in the recruitment process of adult fish as well as fishery resources. Fish larvae samples were collected in the southern waters of Java using the Baruna Jaya IV research vessel in September - October 2015. Fish larvae were collected from 36 stations using bongo-net and oceanographic data such as temperature and salinity were collected using CTD while chlorophyll-a using Aqua MODIS satellite L3. The results showed the range of fish larvae abundance was 0 - 2,074 ind/1000 m3 with an average of 117 ind/1000 m3. The fish eggs were found with an abundance of 0 - 1,601 eggs/1000 m3 with average of 213 eggs/1000 m3. The composition of fish larvae recorded 22 families, with 5 dominant families are Scombridae (28.60%), Bregmacerotidae (22.96%), Carangidae (7.93), Blennidae (7.52%), and Gobiidae (7.52%). The highest abundance of fish larvae was found at stasion 11 had SST 23.50 0C- SSS 34.56 PSU- and CHL-a 0.33 mg/m3 with Bregmacerotidae as the single taxon. The diversity of fish larvae was most prevalent at station 28 (SST 26.7 0C- SSS 34.4 PSU- and CHL-a 0.43 mg/m3) and station 36 (SST 27.4 0C- SSS 34.4 PSU) each found 9 familiesScombridae was mostly found at stasion 22 with sea surface temperature (SST) 26.52 0C - sea surface salinity (SSS) 34.28 PSU- and sea surface chlorophyll-a (CHL-a) 0.41 mg/m3 which is located in the southern waters of Lombok.

Keywords: fish larvae, Indian Ocean, SST, Salinity, abundance, fishery

Topic: Marine Resources, and Conservation