Ochre star mortality during the 2014 wasting disease epizootic: role of population size structure and temperature.
Ochre star mortality during the 2014 wasting disease epizootic: role of population size structure and temperature.
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DOI：
10.1098/rstb.2015.0212
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发表时间：
2016-03-05
期刊：
影响因子：
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通讯作者：
Harvell CD
中科院分区：
文献类型：
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作者：
Eisenlord ME;Groner ML;Yoshioka RM;Elliott J;Maynard J;Fradkin S;Turner M;Pyne K;Rivlin N;van Hooidonk R;Harvell CD
2013年和2014年，从墨西哥到阿拉斯加，有20多个小行星物种被一种与浓核病毒有关的海洋星星消耗病（SSWD）流行病摧毁。对于来自圣胡安群岛、南普吉特湾和华盛顿外海岸的赭腹鱼，时间序列监测显示疾病传播迅速，2014年死亡率高，2015年幸存者的消瘦程度持续。16个地点的疾病高峰患病率范围为100%，总体平均为61%。纵向数据分析表明，疾病风险与规模和温度相关，并导致人口规模结构的变化;成年人口下降到爆发前丰度的四分之一。在实验室实验中，疾病体征发展和死亡之间的时间受到成年人而不是青少年的温度影响，与较低温度处理相比，19°C处理的成年人死亡率高出18%。虽然较大的赭石星比青少年更快地出现疾病迹象，但患病的青少年比患病的成年人死亡更快。异常的2-3°C温暖温度异常与2014年夏季的死亡率一致。我们认为这些温暖的沃茨可能增加了华盛顿州SSWD的疾病进展和死亡率。
Over 20 species of asteroids were devastated by a sea star wasting disease (SSWD) epizootic, linked to a densovirus, from Mexico to Alaska in 2013 and 2014. For Pisaster ochraceus from the San Juan Islands, South Puget Sound and Washington outer coast, time-series monitoring showed rapid disease spread, high mortality rates in 2014, and continuing levels of wasting in the survivors in 2015. Peak prevalence of disease at 16 sites ranged to 100%, with an overall mean of 61%. Analysis of longitudinal data showed disease risk was correlated with both size and temperature and resulted in shifts in population size structure; adult populations fell to one quarter of pre-outbreak abundances. In laboratory experiments, time between development of disease signs and death was influenced by temperature in adults but not juveniles and adult mortality was 18% higher in the 19°C treatment compared to the lower temperature treatments. While larger ochre stars developed disease signs sooner than juveniles, diseased juveniles died more quickly than diseased adults. Unusual 2–3°C warm temperature anomalies were coincident with the summer 2014 mortalities. We suggest these warm waters could have increased the disease progression and mortality rates of SSWD in Washington State.