PDF(Pubmed)
Abstract：
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.
METHODS: 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.
METHODS: 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.
摘要：
背景：人类捕鱼活动对海洋生态系统的环境问题有重大影响，海洋哺乳动物的保护，和人类健康。沿海鲸目动物极易摄入渔具，通过捕捉，或者纠缠，所有这些对这些动物来说都是致命的。特别是,某些沿海海豚和海豚受到渔具如垂钓渔具或渔网等渔具的严重影响，因为它们的食物经常与人类渔业的目标鱼种重叠。
方法：本研究提供了一个在济州岛海岸搁浅的印度-太平洋江豚（Neopocaenaphocaenoides）的案例，大韩民国,摄入渔具和严重的Anisakis感染。尽管该物种栖息在从波斯湾到台湾的水域中，近年来，济州岛报道了几具搁浅的尸体。验尸计算机断层扫描显示前胃有一束四个钓鱼钩，以及尼龙线和带连接器的钢线，被认为是济州带鱼（Trichiuruslepturus）的垂钓装备。进一步的坏死检查显示，前胃中含有大量的Anisakisspp。（线虫：异象科）。组织学检查显示前胃壁增厚，伴有精确的火山溃疡，一层增厚的复层鳞状上皮,鳞状上皮中的间质浸润。
结论：这项研究强调迫切需要解决捕捞活动对海洋哺乳动物的影响，海洋垃圾污染，以及韩国海水中的兼捕问题。此外,在将来的地理生态学或兽医病理学研究中，以及在更新其分布时，应提高济州岛周围海水中的N.phocaenoides的发生率。
方法：本研究提供了一个在济州岛海岸搁浅的印度-太平洋江豚（Neopocaenaphocaenoides）的案例，大韩民国,摄入渔具和严重的Anisakis感染。尽管该物种栖息在从波斯湾到台湾的水域中，近年来，济州岛报道了几具搁浅的尸体。验尸计算机断层扫描显示前胃有一束四个钓鱼钩，以及尼龙线和带连接器的钢线，被认为是济州带鱼（Trichiuruslepturus）的垂钓装备。进一步的坏死检查显示，前胃中含有大量的Anisakisspp。（线虫：异象科）。组织学检查显示前胃壁增厚，伴有精确的火山溃疡，一层增厚的复层鳞状上皮,鳞状上皮中的间质浸润。
结论：这项研究强调迫切需要解决捕捞活动对海洋哺乳动物的影响，海洋垃圾污染，以及韩国海水中的兼捕问题。此外,在将来的地理生态学或兽医病理学研究中，以及在更新其分布时，应提高济州岛周围海水中的N.phocaenoides的发生率。
