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The Importance of Understanding the Current Status of Critically Endangered Species in Shark Fisheries in Muncar, Indonesia

Authors :
Osmaleli Osmaleli
Adrianto Luky
Kusumastanto Tridoyo
Yulianto Gatot
Salim Muhammad
Rizka Antika
Tawang Firmansyah
Larasati Chindy
Fadloli Ahmad
Booth Hollie
Source :
BIO Web of Conferences, Vol 134, p 06006 (2024)
Publication Year :
2024
Publisher :
EDP Sciences, 2024.

Abstract

One-third of all elasmobranch species are classified as globally threatened (i.e., vulnerable, endangered, or critically endangered) according to the IUCN Red List of Threatened Species, The Sphyrnidae family, once among the most abundant shark species complexes, now faces one of highest extinction risks by the IUCN in 2019. This study aimed to analyse the total catch of Sphyrnidae in Muncar, East Java, Indonesia, from 2020 to 2023, and to evaluate the proportion of Sphyrnidae catches relative to other shark during this period. The research utilized both primary and secondary data sources, with daily enumeration conducted, using guidebooks, rulers, hand scales, cameras, code tags, plastic mats, and identification books. The results revealed that most Sphyrnidae catches over the past four years were Sphyrna lewini, with 653 females and 433 males recorded. In contrast, Sphyrna mokarran and Sphyrna zygaena were only landed in minimal numbers over the entire period. Furthermore, S. lewini accounted for less than 15% of the total shark catch, with an average of 58 shark species caught annually. The use of fishing gear by fishers operating vessels under 5 Gross Tonnage (GT) with gillnets in the 10-28 GT range with longlines was identified as significant factor influencing catch composition.”

Details

Language :
English, French
ISSN :
21174458
Volume :
134
Database :
Directory of Open Access Journals
Journal :
BIO Web of Conferences
Publication Type :
Academic Journal
Accession number :
edsdoj.bfbdbfbcb514b409f35892be064ae9b
Document Type :
article
Full Text :
https://doi.org/10.1051/bioconf/202413406006