| Abstrak/Abstract |
Indonesia has a wide variety of shark species distributed almost in all waters. Sharks have long been as the target species of capture fisheries due to its high economic value. This study aimed to determine the species composition and biological aspects of shark landed in PPN Brondong East Java. The observations of sharks were conducted during November 2016 until January 2017; totally 1924 individual was used in this research. Each sample collected was identified, measure its length and weight, determined the sex and maturity. Results of this research showed that the sharks are not the main target species, but as a by-catch besides the others demersal fishes. Most of the sharks caught have a relatively small size. Fishermen use the non-selective fishing gear with small mesh sizes, which is allowing catching various sizes of fish. The number of shark species landed at Brondong Fishing Port was 29 species belonging to 20 genera. Chiloscyllium punctatum and Sphyrna lewini are the most frequently caught, 15% and 14.9% respectively. While others species which were found in lower proportions were Hemigaleus microstoma (9.9%), Atelomycterus marmoratus (9.3%) and Carcharhinus sealei (8.4%). The length of the Chiloscyllium punctatum ranged from 34-97 cm, S. lewini ranged from 38-228 cm, H. microstoma ranged from 30-308 cm, A. marmoratus ranged from 30-68 cm, and Carcharhinus sealei ranged from 25-92 cm. Each species of a shark has variations in terms of sex ratio and maturity. Based on the size of the length, most of the sharks caught have not reached yet the reproductive phase. |
