Marine debris ingestion by odontocete species from the Southwest Atlantic Ocean: Absence also matter

Padula, Antonella Daira; Machado, Rodrigo; Milmann, Lucas; León, Alberto Ponce de; Gana, Joaquín C. M.; Wickert, Janaína Carrion; Argañaraz, María Eugenia; Bastida, Ricardo; Rodríguez, Diego H.; Denuncio, Pablo

doi:10.1016/j.marpolbul.2022.114486

Cited by 5 publications

(1 citation statement)

References 67 publications

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“…ALDFG poses a significant threat to the top predators in marine ecosystems, such as marine mammals, reptiles, elasmobranchs, and birds, in several ways [ 10 – 12 ]. Coastal cetaceans, including several dolphin and porpoise species, are particularly vulnerable to ingestion of fishing gear [ 13 ] and being bycaught [ 14 ] because of their proximity to the coastline and their prey species targeted by human fisheries. In general, entanglement or marine debris can be more fatal in deep-diving pelagic cetaceans [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Ingestion of fishing gear and Anisakis sp. infection in a beached Indo-Pacific finless porpoise (Neophocaena phocaenoides) in the Jeju Island, Republic of Korea: findings from post-mortem computed tomography and necropsy

Lee,

Yuen,

Kim

et al. 2024

BMC Vet Res

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Background Human fishing activities have significantly affect environmental concern for marine ecosystems, conservation of marine mammals, and human health. Coastal cetaceans are highly vulnerable to ingestion of fishing gear, bycatching, or entanglement, all of which can be fatal for these animals. In particular, certain coastal dolphins and porpoises are heavily impacted by fishing gear such as angling gear or stownet, as their food often overlap with the target fish species of human fisheries. Case presentation This study presents a case of an Indo-Pacific finless porpoise (Neophocaena phocaenoides) beached on the coast of Jeju Island, Republic of Korea, with ingestion of fishing gear and severe Anisakis infection. Although this species inhabits waters ranging from the Persian Gulf to Taiwan, several stranded carcasses have been reported on Jeju Island in recent years. Post-mortem computed tomography revealed a bundle of four fishing hooks in the forestomach, along with nylon lines and steel lines with connectors, which were assumed to be angling gear for Jeju hairtail (Trichiurus lepturus). Further necroscopic investigation revealed that the forestomach contained a large number of Anisakis spp. (Nematoda: Anisakidae). Histological examination revealed a thickened forestomach wall with pinpoint and volcanic ulcerations, a thickened layer of stratified squamous epithelium, and infiltrated stroma in the squamous epithelium. conclusions This study emphasizes the urgent need to address the impact of fishing activities on marine mammals, marine litter pollution, and the bycatch problem in Korean seawater. In addition, the occurrence of N. phocaenoides in seawater around Jeju Island should be raised in future geographical ecology or veterinary pathology studies and when its distribution is updated.

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