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Abdullah, Agung Sobri
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Agriculture, Biological Sciences & Forestry Chemistry Earth & Planetary Sciences Environmental Science Immunology & microbiology

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Selectivity and Effectiveness of Multilevel Wall Traps for Capturing Lobsters (Panulirus Spp) at Laboratory Scale Abdullah, Agung Sobri; Suharyanto, Suharyanto; Soeboer, Deni Achmad
Journal La Lifesci Vol. 6 No. 3 (2025): Journal La Lifesci
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallalifesci.v6i3.2334

Abstract

Krendet, gill nets, and traps are fishing gear commonly used to catch lobsters (Panulirus spp) by Indonesian fishermen, but there are many issues related to the use of non-selective and environmentally unfriendly fishing gear. This laboratory research aims to develop selective and effective lobster capture technology, in line with the implementation of PERMEN KP No. 27 of 2024 regarding lobster management. The data obtained were analyzed using the Independent Sample t-Test to evaluate the differences in selectivity and effectiveness between the HDPE multilevel wall traps and the standard foldable traps in capturing legal-sized lobsters. The analysis results showed that the multilevel wall traps performed better, with a total of 56 lobsters captured, all of which were legal-sized (≥ 200 grams), while the foldable traps only captured 26 legal lobsters and 20 illegal ones, accounting for approximately 43.48% of illegal catches. This shows that the tiered wall trap is more selective and environmentally friendly. In terms of the proportion of legal catches, the use of multilevel wall traps increased the number of legal catches by 77.8% compared to foldable traps, which is highly significant for the sustainability of lobster resources. Statistical tests also show that the average weight of lobsters caught by tiered wall traps is significantly higher, with a mean difference of 173.02 grams (p 0.000) and a 95% confidence interval between 126.99 and 219.04 grams.
Desain of Multilevel Wall Trap For Selectivity of the Capture Spiny Lobster Abdullah, Agung Sobri; Suharyanto, Suharyanto; Soeboer, Deni Achmad
Journal La Lifesci Vol. 6 No. 5 (2025): Journal La Lifesci
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallalifesci.v6i5.2673

Abstract

The challenge faced by fishermen involved in lobster fishing is the decline in population due to overfishing and unsustainable practices. Intensive lobster fishing can disrupt the balance of the ecosystem, especially if the fishing gear used is not environmentally friendly. Lost fishing gear can continue to catch lobsters and other species unintentionally, a phenomenon known as ghost fishing. The methods applied in this research include literature review and experimental design. The literature review was conducted by examining data and the development of lobster traps from research publications and various books related to fishing. The analysis of the development of existing trap designs before the modification process is a key factor in selecting the standard trap design. This aims to develop lobster traps that are selective for legal sizes. The tiered wall trap has two entrances, one at the top in the shape of a cylinder with a width of 15 cm and a length of 20 cm, cylindrical in shape and without any hole patterns. It is expected that the trapped lobsters will not be able to escape because the length of the entrance itself is longer than the leg size of the catchable lobsters, where lobsters with a carapace length of 8.3 cm have a front leg length of 8 cm, making it impossible for the caught lobsters to climb out. The design of the tiered wall trap with a perforated pattern on the base of the trap at 8 cm is expected to allow catchable lobsters to climb into the trap's mouth. The tiered walls help lobsters to easily climb up to the mouth, thereby increasing the effectiveness and selectivity of the trap for catchable-sized lobsters. However, this design still needs to be tested in lobster catching areas or in laboratory scale.
Co-Authors Soeboer, Deni Achmad Suharyanto