Biological aspect of double-spined rock lobster (Panulirus penicillatus) in Wonogiri Regency waters, Central Java, Indonesia

Abstract

Spiny lobsters (Panulirus spp.) are an economically important species in the fishery industry and continuously being exploited, particularly in the South of Java. Lobsters in Wonogiri Regency waters have decreased in number, and the average size lobsters caught is also getting smaller. Double-spined rock lobster (Panulirus penicillatus) is the dominant species caught by the fishermen but has limited biological information. The objective of this study is to identify several factors affecting double-spined rock lobster (P. penicillatus) population in terms of growth parameters, mortality rates, and exploitation rates. This study was conducted in August 2018-January 2019. The analysis uses the FAO-ICLARM Stock Assessment Tool (FISAT II) program. The growth rates (K) of P. penicillatus male and female lobsters are 0.32 year-1 and 0.37 year-1. The mortality rates (Z) 2.35 year-1 for males and 2.84 year-1 for females. The exploitation rate of males 0.77 and females 0.77 and 0.78, respectively. It has exceeded the optimal level (0.5) and reached overfishing value. The management of lobster fisheries needs to be done by several approaches, including a reduction of fishing efforts and prohibited from catching lobster in berry (with eggs) conditions to sustain their population naturally.

Spawning potential ratio of comercially important spiny lobster in Donggala Waters Central Sulawesi

“…Dari ketujuh spesies yang ada, beberapa diantaranya dilaporkan telah mengalami penangkapan berlebih di perairan Indonesia seperti P. homarus (Kembaren & Nurdin, 2015;Zairion et al, 2017), P. versicolor dan P. longipes (Tirtadanu et al, 2021a;Tirtadanu et al, 2021b) dan P. penicillatus (Beni et al, 2020).…”

Nursery of sand lobster, Panulirus homarus (Linnaeus 1758) in rearing tanks with some shelter combinations

“…The high market demand for scalloped spiny lobsters will pressure the preservation of their stocks in the wild [1]. Overfishing pressure is indicated by the decrease in the number of catches [3] and the smaller size of lobsters caught in some locations in Indonesia [4]. As a result, the latest data shows that the lobster production trends in some areas are static [5].…”

Carapace length-frequency distribution and carapace length-weight correlation of ornate spiny lobster (Panulirus ornatus) in Sebatik Island Waters – Indonesia

“…Indonesia has a high level of endemicity and diversity of lobster species with 19 species of lobster known genus of Panulirus which have high commercial value among other crustacean or fisheries commodities 1,2,3,4,5,6 . Indonesia is a hotspot for lobster biodiversity, and Sebatik Island Waters is one of them 7,8,9 . Lobster (Panulirus spp) is known by local communities in Sebatik Island as udang karang or udang barong, because there find and catch this commodity in coral areas.…”