Abandoned, lost, or discarded fishing gear at urban coastlines

Gajanur, Anya R.; Jaafar, Zeehan

doi:10.1016/j.marpolbul.2022.113341

Cited by 20 publications

(6 citation statements)

References 44 publications

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“…Along this Strait, approximately 600m wide at the narrowest point, there are 108 sea-based mariculture farms registered with the Singapore Government. A total of seven Abandoned, Lost or Discarded Fishing Gears (ALDFGs), identified as mariculturecage nets, have washed up on Singapore's coastlines along the eastern Johor Strait between 2000 to 2019 (Gajanur and Jaafar, 2022). While fishing law enforcement has been shown to effectively reduce fishing related dugong mortality (Marsh, 2000), this issue remains in areas such as the Johor Strait, which abuts two countries with different sets of legislations and multiple stakeholders occupying the shorelines (Ponnampalam et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Dugongs (Dugong dugon) along hyper-urbanized coastlines

Ow²,

Jaafar³

2022

Front. Mar. Sci.

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Coastal development and the increased anthropogenic use of sea spaces have rapidly degraded coastal habitats throughout Southeast Asia. We study how these activities impact dugong (Dugong dugon) population(s) along hyper-urbanized coastlines of the Johor and Singapore Straits through literature reviews and field surveys. Our review recovered sixty-nine live observations and carcass observations of dugongs between 1820 and 2021. The eastern Johor Strait is identified as a dugong hotspot. We observed peaks in observations coincident with the Northeast and Southwest monsoons. Distribution patterns of dugong observations were likely driven by a combination of natural and anthropogenic factors such as seasonality in seagrass abundance, tidal cycles, wind patterns and vessel traffic. Our field surveys ascertained active foraging sites along the anthropogenically disturbed Johor Strait and western Singapore Strait. Evident from our study is the importance of reef-associated seagrass meadows as refugia for foraging dugongs along areas of high anthropogenic use. This study provides an ecological baseline for dugong research along the Johor and Singapore Straits—within the data-poor western Malay Archipelago—, and aids in the design of sustainable management strategies and conservation programs for dugongs along areas where urbanization is commonplace.

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Section: Discussionmentioning

confidence: 99%

Dugongs (Dugong dugon) along hyper-urbanized coastlines

Ow²,

Jaafar³

2022

Front. Mar. Sci.

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“…Attributing plastics pollution to sources beyond empirical observations remains challenging and often contested among marine stakeholders and indeed fisheries researchers. In this context there has been increasing recognition of the need to address adverse ecological and socioeconomic effects of ALDFG particularly in urbanized coastlines g [23][24][25] such as those of Hong Kong. Quantifying beach plastic litter worldwide through field surveys is also complicated, as plastic debris littered on inaccessible beaches might be excluded [26] .…”

Section: Discussionmentioning

confidence: 99%

Fishing Production and Fishing Changes in Hong Kong after the Ground Trawl Ban of 31st December 2012: A Geospatial Evaluation

Coleby

Grist

2023

j. of geogr. res.

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From data published by the Hong Kong SAR (HKSAR) government in their two sole fisheries surveys of 2006 and 2016/2017, the authors produced regional maps using spatial interpolation to more accurately describe and estimate the geographic coverage of changes in fishing production in Hong Kong waters since the ground trawl ban of 2012 December 31st. These suggest the fishing industry has adapted to smaller craft, and that fishing production increased in several areas in the period after the ground trawl ban came into effect. In addition, the maps enable a smoother assessment to be made of the geospatial changes in fishing production which have occurred since the ground trawl ban and suggest a ‘workaround’ by fishermen. In particular, small fishing craft known as sampans are able to take advantage by being more suitable vessels for areas such as narrower or shallower bays. Marine plastics pollution is also a proxy indicator of these activities, as evidenced by discarded fishing gear that includes plastic nets, floats, and other fishing boat equipment.

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“…It transpired through the expert elicitation that cases exist as unpublished for far more species than is currently described in the published literature, although new publications filling in those gaps have emerged since our literature search was performed (e.g. Gajanur and Jaafar, 2022;Ng et al, 2022;Prampramote et al, 2022;Yong et al, 2021). Green and leatherback turtles were the only two species for which published cases of both entanglement and ingestion were available from the SE Asian countries.…”

Section: Taxonomic Groupsmentioning

confidence: 99%