The differences of depth on the species composition of Spiny Lobster Puerulus on South Pacitan Regency, East Java

Abstract

Lobster resources is the one of renewable resources but if catches are increasing without any control will cause a depleted resource. Catching lobsters is not only for adult phase but for all phases are captured. The purpose of this study to determine composition of lobster seeds between depths which has a high value of lobster seeds collection so that it can be used as a reference for lobster protection in nature. This research was conducted in January – February 2019, located in Wawaran beach waters, Pacitan. The statistical method used in this research are Chi-Square and Kruskall-Wallis analysis. Based on the results of atractror puerulus lobster in two different depths (14 and 20 meter) in Wawaran beach waters found that there are 4 species puerulus, i.e. Panulirus homarus, Panulirus penicillatus, Panulirus ornatus and Panulirus versicolor. It was found that different depths did not affect the composition of the collected puerulus species. Then the Kruskal-Wallis test at 14 meters and 20 meters depth found a significant difference in the value of each type of lobster. The type of puerulus from Panulirus homarus has the dominant results compared than the other three species.

Growth Patterns and Mortality of Lobster Panulirus ornatus from the Catch of Bottom Gill Net Fishers in the Western Waters of Tarakan Island

“…Additionally, P. ornatus lobsters prefer rocky, shallow, and murky waters. (Saputra et al 2020;Setyanto et al 2018Setyanto et al , 2019Setyanto et al , 2020Setyanto et al , 2021 explained that the species has a critical economic value; therefore, management is needed to protect the sustainability of the species in Indonesian waters. The species has a relatively high economic value with a price of approximately IDR 600,000/kg, which increased to IDR 1,300,000/ kg in December 2021 due to a decrease in catches.…”