Kelimpahan Larva Udang Penaeid pada Ekosistem Mangrove di Desa Pasar Banggi, Kabupaten Rembang

Abstract

The role of mangrove ecosystems as the breeding and feeding area for shrimp larvae can be used by farmers naturally. Therefore, the existence of penaeid shrimp larvae can provide information about the distribution of the larvae. The purpose of this study is to determine the type of penaeid shrimp larvae in the mangrove ecosystem, to determine the abundance and dominance of penaeid shrimp larvae and to determine the results of multicoliniearity test and multiple regression analysisof penaeid shrimp larvae in the mangrove ecosystem in Pasar Banggi Village, Rembang. The study was conducted on April-Mei 2016. The location of research consists of mangrove age of 50 years, mangrove age of 7 years and mangrove age of 3 years. The sampling technique for collecting the shrimp larvae is stratified sampling method. Penaeid shrimp larvae sampling was done by pushing scoop net as far as 50 meters, mesh size of 0.5 mm. Penaeid shrimp larvae type that were found during the researchare Sicyonia, Trachypenaeus, Xyphopenaeus, Penaeus and unidentified larvae. Larvae genus Trachypenaeus and Penaeus always appear in the all three areas, while the genus Sicyonia and Xyphopenaeus do not appear once in mangrove age of 7 years and mangrove age of 3 years. The highest abundance of penaeid shrimp larvae obtained during the study in mangrove age of 3 years followed mangrove age of 7 years and the lowest abundance in mangrove age of 50 years. Penaeid shrimp larvae type most commonly found are Penaeus 76.559%, while the least is Sicyonia 0.215%. Dominance index values ranged from 0.371 to 0.523. Based on the results of multi-coliniearity test, temperature, current speed, brightness and salinity have strong correlation. Multiple regression analysis showed that the relation between temperature, current speed, brightness with the abundance of penaeid shrimp larvae are positive, while the relation between salinity with the abundance of penaeid shrimp larvae is negative