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Lookup NU author(s): Dr Ellen Barrowclift-Mahon, Professor Per Berggren
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2024 The Authors. Indonesian coastal waters include several marine megafauna biodiversity hotspots. Several fish populations of ecological and socio-economic importance, such as elasmobranchs (sharks and rays), have experienced rapid decline due to unsustainable human activities, primarily overfishing. Small-scale fisheries (SSF) are currently exempt from governmental fisheries management measures despite contributing a significant proportion of a total catch. The Generalised Additive Models were used to investigate the effect of variations in oceanographic parameters of the Teluk Penyu fishing ground, south of central Java, on the magnitude of Mobulidae (Mobula spp.) catch based on its landings data over ten years (2009–2018) from one of Indonesia's largest ports, Cilacap, Central Java, Indonesia. Mobulidae catch from Teluk Penyu fishing ground was generally higher from June to November when the water exhibited relatively high sea surface salinity (sal >34.1 ‰), chlorophyll (0.32–0.45 mg/m3), and nitrate (nit >0.0045 mg NO3/m3), water speed (>0.29 m/s) and eddy kinetic energy (>0.04 m3/s2) levels, and relatively low sea surface temperature (<28 °C), oxygen (<0.182 mg O2/m3) and sea surface height (<0.9 m) levels than the other months of the year. This study reveals that satellite Earth Observation (EO) data provided a preliminary relationship between oceanographic conditions and the amount of catch for developing more effective management and conservation measures for endangered species like Mobulidae. Utilizing EO data may also be applied to help inform much-needed ecosystem-based management measures, including habitat protection and bycatch reduction for conserving endangered Mobulidae species in the Southeast Indian Ocean. The in-situ onboard ocean observation and temporal species-specific catch data will greatly complement the current work.
Author(s): Khan AMA, Barrowclift E, Xu Y, Hong G, Purba NP, Pasaribu B, Dewanti LP, Ismail MR, Taofiqurohman A, Berggren P
Publication type: Article
Publication status: Published
Journal: Journal of Sea Research
Year: 2024
Volume: 201
Print publication date: 01/10/2024
Online publication date: 30/08/2024
Acceptance date: 27/08/2024
Date deposited: 10/09/2024
ISSN (print): 1385-1101
ISSN (electronic): 1873-1414
Publisher: Elsevier BV
URL: https://doi.org/10.1016/j.seares.2024.102534
DOI: 10.1016/j.seares.2024.102534
Data Access Statement: The data that has been used is confidential.
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