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首页> 外文期刊>Harmful Algae >Brevetoxin exposure, superoxide dismutase activity and plasma protein electrophoretic profiles in wild-caught Kemp's ridley sea turtles (Lepidochelys kempii) in southwest Florida
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Brevetoxin exposure, superoxide dismutase activity and plasma protein electrophoretic profiles in wild-caught Kemp's ridley sea turtles (Lepidochelys kempii) in southwest Florida

机译：佛罗里达州西南部野生捕获的坎普里德利海龟（Lepidochelys kempii）的短毒素毒素暴露，超氧化物歧化酶活性和血浆蛋白电泳图谱

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Because of their vulnerable population status, assessing exposure levels and impacts of toxins on the health status of Gulf of Mexico marine turtle populations is critical. From 2011 to 2013, two large blooms of the red tide dinoflagellate, Karenia brevis, occurred along the west coast of Florida USA (from October 2011 to January 2012 and October 2012 to April 2013). Other than recovery of stranded individuals, it is unknown how harmful algal blooms affected the Kemp's ridley sea turtles (Lepidochelys kempii) inhabiting the affected coastal waters. It is essential to gather information regarding brevetoxin exposure in these turtles to determine if it poses a threat to marine turtle health and survival. From April 2012 to May 2013, we collected blood from 13 immature Kemp's ridley turtles captured in the Pine Island Sound region of the Charlotte Harbor estuary. Nine turtles were sampled immediately after or during the red tide events (bloom group) while four turtles were sampled between the events (non-bloom group). Plasma was analyzed for total brevetoxins (reported as ng PbTx-3 eq/mL), superoxide dismutase (SOD) activity, total protein concentration and protein electrophoretic profiles (albumin, alpha-, beta- and gamma-globulins). Brevetoxin concentrations ranged from 7.0 to 33.8 ng PbTx-3 eq/ mL. Plasma brevetoxin concentrations in the nine turtles sampled during or immediately after the red tide events were significantly higher (by 59%, P = 0.04) than turtles sampled between events. No significant correlations were observed between plasma brevetoxin concentrations and plasma proteins or SOD activity, most likely due to the small sample size; however alpha-globulins tended to increase with increasing brevetoxin concentrations in the bloom group. Smaller (carapace length and mass) bloom turtles had higher plasma brevetoxin concentrations than larger bloom turtles, possibly due to a growth dilution effect with increasing size. The research presented here improves the current understanding of potential impacts of environmental brevetoxin exposure on marine turtle health and survival.
机译：由于其脆弱的种群状况，评估暴露水平和毒素对墨西哥湾海龟种群健康状况的影响至关重要。从2011年到2013年，美国佛罗里达州西海岸（从2011年10月到2012年1月以及从2012年10月到2013年4月）发生了两次大潮红藻鞭毛，短小红花。除了恢复滞留的个体外，尚不清楚有害藻华如何影响栖息在受灾沿海水域的肯普的里德利海龟（Lepidochelys kempii）。收集有关这些龟中短毒素的信息至关重要，以确定它是否对海龟的健康和生存构成威胁。从2012年4月到2013年5月，我们从在夏洛特港河口的松岛湾地区捕获的13只未成熟的坎普的里德利龟中收集了血液。在赤潮事件发生后或之中立即采样了九只海龟（水华组），而在两次赤潮事件之间（非水华组）则对四只海龟进行了采样。分析血浆中的总短毒素（报告为ng PbTx-3当量/毫升），超氧化物歧化酶（SOD）活性，总蛋白浓度和蛋白电泳图谱（白蛋白，α-，β-和γ-球蛋白）。短毒素的浓度范围为7.0至33.8 ng PbTx-3当量/毫升。在赤潮事件期间或之后取样的九只海龟的血浆短肠毒素浓度显着高于两次活动之间取样的海龟（高59％，P = 0.04）。血浆短肠毒素浓度与血浆蛋白或SOD活性之间未发现显着相关性，这很可能是由于样本量小所致。然而，在开花组中，随着球藻毒素浓度的增加，α-球蛋白倾向于增加。较小（甲壳长度和质量）的bloom龟比较大的bloom龟具有更高的血浆短毒素浓度，这可能是由于随着大小的增长而产生的稀释效应。此处提出的研究提高了当前对环境短杆菌毒素暴露对海龟健康和生存的潜在影响的了解。

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