The sharks and rays at Singapore’s fishery ports

Clark‐Shen, Naomi; Tingting, Kathy Xu; Rao, Madhu; Cosentino-Roush, Shannon; Sandrasegeren, Rajkumar; Gajanur, Anya R.; Chapman, Demian D.; Ying, Esther Lee Xin; Flowers, Kathryn I.; Feldheim, Kevin A.; Manjaji‐Matsumoto, B. Mabel; Hui, Sirius Ng Zheng

doi:10.1016/j.fishres.2020.105805

Cited by 9 publications

(19 citation statements)

References 42 publications

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“…bags, belts, wallets and jewellery), and they have a high economic value (Karthikeyan et al, 2009; Sahubawa, Pertiwiningrum & Rahmadian, 2018). Additionally, stingrays remain a major fishery export from Indonesia with stingray meat being consumed throughout the region, resulting in growing conservation concerns for species such as M. gerrardi and M. macrura (Clark‐Shen et al, 2021). This targeted fishing pressure on the stingrays may also be causing population declines.…”

Section: Discussionmentioning

confidence: 99%

“…To ensure the sustainable use of wedgefish, giant guitarfish and stingrays in Indonesia, management will be needed across multiple levels, from fisheries to exporters, with strategic and evidence‐based methods (Booth et al, 2020). Improved trade monitoring and traceability, as well as awareness campaigns, will be key to reduce fishing mortality, utilization and trade (Clark‐Shen et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

“…This complication in species differentiation is an ongoing issue that confounds efforts to quantify species‐specific catch and consumption (e.g. Clark‐Shen et al, 2021). The lack of species‐specific reporting was thought to have masked the known global declines for wedgefish and giant guitarfish throughout their distribution.…”

Section: Discussionmentioning

confidence: 99%

“…Scientific advice and information (e.g. monitoring of fisheries landings, supply chains) will be required to make management decisions for elasmobranch fisheries in South‐East Asia (Clark‐Shen et al, 2021). Indonesia has complex fisheries supply and trade chains, from fishers to buyers to exporters, which have intricate interactions and different drivers occurring throughout the chain (Rusandi et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…It is also the third largest exporter of shark fins with regards to quantity, with an average annual export of 1,235 tonnes, and the sixth largest in value, worth an average of US$10 million per year (Dent & Clarke, 2015). Elasmobranch meat is an important source of protein for communities in South-East Asia (Ahmad et al, 2016), and a large volume of elasmobranch products, particularly stingrays, continue to be exported to regional markets such as Singapore (Clark-Shen et al, 2021). In Indonesia, wedgefishes and guitarfishes are caught as bycatch in a variety of fisheries, but they are also specifically targeted in the tangle net fishery, with bottlenose wedgefish Rhynchobatus australiae the main target species.…”

Section: Introductionmentioning

confidence: 99%

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Untangling the Indonesian tangle net fishery: Describing a data‐poor fishery targeting large, threatened rays (Superorder Batoidea)

D’Alberto

White

Chin

et al. 2021

Aquatic Conservation

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Shark‐like rays (Order Rhinopristiformes) are among the most threatened families of marine fish, yet little is known about their populations. These rays are normally taken as opportunistic catch in fisheries targeting other species and are thus poorly reported. One exception is the Indonesian tangle net fishery, which targets shark‐like rays. Market surveys of Muara Angke landing site in Jakarta, north‐western Java were conducted between 2001 and 2005, and the landed catch from the tangle net fishery was recorded (the Muara Angke landing site includes landings from more than one fishery). In total, 1,559 elasmobranchs (sharks and rays) were recorded, comprising 24 species of rays and nine species of sharks. The most abundant species landed were the pink whipray Pateobatis fai and the bottlenose wedgefish Rhynchobatus australiae, the latter being the main target species. Catch composition varied based on differences in species catchability and may also be indicative of localized declines. The fishery was highly selective for larger sized individuals, while smaller size classes of many ray species, including the target species, were also caught in other Indonesian fisheries, resulting in fishing pressure across all age classes. The decline of tangle net vessels in the fishery and the potential shift in catch composition in the Indonesian tangle net fishery increase concerns about the status of shark‐like rays and stingrays in Indonesia.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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