美国得克萨斯州南部海龟在短裸甲藻赤潮期间接触短裸甲藻毒素的情况。

Brevetoxin exposure in sea turtles in south Texas (USA) during Karenia brevis red tide.

作者信息

Walker Jennifer Shelby, Shaver Donna J, Stacy Brian A, Flewelling Leanne J, Broadwater Margaret H, Wang Zhihong

机构信息

National Park Service, Padre Island National Seashore, Division of Sea Turtle Science and Recovery, PO Box 181300, Corpus Christi, TX 78480, USA.

出版信息

Dis Aquat Organ. 2018 Jan 31;127(2):145-150. doi: 10.3354/dao03194.

DOI:10.3354/dao03194

PMID:29384484

Abstract

Five green (Chelonia mydas) and 11 Kemp's ridley (Lepidochelys kempii) sea turtles found dead, or that died soon after stranding, on the southern Texas (USA) coast during 2 Karenia brevis blooms (October 2015, September-October 2016) were tested for exposure to brevetoxins (PbTx). Tissues (liver, kidney) and digesta (stomach and intestinal contents) were analyzed by ELISA. Three green turtles found alive during the 2015 event and 2 Kemp's ridley turtles found alive during the 2016 event exhibited signs of PbTx exposure, including lethargy and/or convulsions of the head and neck. PbTx were detected in 1 or more tissues or digesta in all 16 stranded turtles. Detected PbTx concentrations ranged from 2 to >2000 ng g-1. Necropsy examination and results of PbTx analysis indicated that 10 of the Kemp's ridleys and 2 of the green turtles died from brevetoxicosis via ingestion. This is the first documentation of sea turtle mortality in Texas attributed to brevetoxicosis.

摘要

在2次短裸甲藻藻华事件（2015年10月、2016年9 - 10月）期间，在美国得克萨斯州南部海岸发现5只绿海龟（蠵龟）和11只肯氏龟（丽龟）死亡，或在搁浅后不久死亡，对它们进行了短裸甲藻毒素（PbTx）暴露检测。通过酶联免疫吸附测定法（ELISA）分析了组织（肝脏、肾脏）和消化物（胃和肠内容物）。在2015年事件中发现的3只存活绿海龟和2016年事件中发现的2只存活肯氏龟表现出短裸甲藻毒素暴露迹象，包括嗜睡和/或头颈抽搐。在所有16只搁浅海龟的1种或更多组织或消化物中检测到了短裸甲藻毒素。检测到的短裸甲藻毒素浓度范围为2至>2000纳克/克。尸检检查和短裸甲藻毒素分析结果表明，10只肯氏龟和2只绿海龟因摄入短裸甲藻毒素中毒死亡。这是得克萨斯州首次记录到海龟因短裸甲藻毒素中毒死亡。