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On-board study of gas embolism in marine turtles caught in bottom trawl fisheries in the Atlantic Ocean.
Scientific Reports ( IF 3.8 ) Pub Date : 2020-03-27 , DOI: 10.1038/s41598-020-62355-7
M L Parga 1 , J L Crespo-Picazo 2 , D Monteiro 3 , D García-Párraga 2 , J A Hernandez 4 , Y Swimmer 5 , S Paz 3 , N I Stacy 6
Affiliation  

Decompression sickness (DCS) was first diagnosed in marine turtles in 2014. After capture in net fisheries, animals typically start showing clinical evidence of DCS hours after being hauled on-board, often dying if untreated. These turtles are normally immediately released without any understanding of subsequent clinical problems or outcome. The objectives of this study were to describe early occurrence and severity of gaseous embolism (GE) and DCS in marine turtles after incidental capture in trawl gear, and to provide estimates of on-board and post-release mortality. Twenty-eight marine turtles were examined on-board fishing vessels. All 20 turtles assessed by ultrasound and/or post-mortem examination developed GE, independent of season, depth and duration of trawl and ascent speed. Gas emboli were obvious by ultrasound within 15 minutes after surfacing and worsened over the course of 2 hours. Blood data were consistent with extreme lactic acidosis, reduced glomerular filtration, and stress. Twelve of 28 (43%) animals died on-board, and 3 of 15 (20%) active turtles released with satellite tags died within 6 days. This is the first empirically-based estimate of on-board and post-release mortality of bycaught marine turtles that has until now been unaccounted for in trawl fisheries not equipped with turtle excluder devices.



中文翻译:

对大西洋底拖网渔业中捕获的海龟中的气体栓塞进行的船上研究。

减压病(DCS)最早在2014年在海龟中被诊断出来。在网捕鱼中捕获后,动物通常在船上拖曳数小时后就开始显示DCS的临床证据,如果不加以治疗,通常会死亡。这些乌龟通常会立即释放,而对随后的临床问题或后果一无所知。这项研究的目的是描述在拖网渔具中意外捕获后海龟中气体栓塞(GE)和DCS的早期发生和严重程度,并提供船上和释放后死亡率的估计值。在船上的渔船上检查了28只海龟。通过超声和​​/或验尸检查评估的所有20只海龟均发育GE,而与季节,拖网深度和持续时间以及上升速度无关。堆焊后15分钟内,超声检查可见气体栓塞,并在2小时内恶化。血液数据与极端乳酸性酸中毒,肾小球滤过减少和压力一致。28只动物中有12只(43%)在船上死亡,而15只(20%)带有卫星标签的活动龟中有3只在6天内死亡。这是对基于经验的首次捕获的海龟的船上和释放后死亡率的第一个基于经验的估计,到目前为止,在没有配备海龟排除器的拖网渔业中,这还没有得到证实。

更新日期:2020-03-27
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