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首页> 外文期刊>Marine Mammal Science >Short-term survival of Steller sea lion (Eumetopias jubatus) pups: Investigating the effect of health status on survival
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Short-term survival of Steller sea lion (Eumetopias jubatus) pups: Investigating the effect of health status on survival

机译：斯特勒海狮幼崽的短期存活：调查健康状况对存活的影响

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摘要

We estimated survival probabilities for Steller sea lion (Eumetopias jubatus) pups from 3 wk to 6 wk old and from 6 wk to 1 yr at three rookeries in southeastern Alaska. We also investigated the effect of mass, body condition, health variables, and the genetic origin on 3-6 wk survival. Survival differed substantially among rookeries and between sexes, with survival lowest at Hazy Islands, intermediate at White Sisters, and highest at Graves Rocks and survival lower for males than females. Body mass, body condition, and hematocrit were positively related to survival and blood % H2O and haptoglobin level (for females; no relationship for males) were negatively related to survival. Taking predictor variables collectively, sea lion pups at Hazy Islands, which had the lowest survival probability, had the lowest mass, hematocrit, and hemoglobin, and had high levels of blood % H2O, and hookworm infection. Values from Graves Rocks, which had the highest survival, were the opposite of those from Hazy Island (e.g., high mass, body condition, hematocrit, and hemoglobin), while those from White Sisters (intermediate survival) had varying means (e.g., high hematocrit and hemoglobin and low hookworms, but also low body condition); these patterns suggest that physiological factors potentially underlie rookery differences in survival.
机译：我们估计了阿拉斯加东南部三个群中3周龄至6周龄和6周龄至1年的斯特勒海狮幼崽的生存概率。我们还研究了体重，身体状况，健康变量和遗传起源对3-6周生存率的影响。各个种群之间和性别之间的生存率差异很大，在朦胧群岛的生存率最低，在白姐妹岛的生存率最高，在格雷夫斯岩礁的生存率最高，男性的生存率低于女性。体重，身体状况和血细胞比容与存活率呈正相关，血液中的H2O和触珠蛋白水平（女性）;与男性无相关性与血液存活率呈负相关。综合考虑预测变量，朦胧岛上的海狮幼崽存活率最低，质量，血细胞比容和血红蛋白最低，血液中的％H2O和钩虫感染水平高。 Graves Rocks存活率最高的值与朦胧岛的值相反（例如，高质量，身体状况，血细胞比容和血红蛋白），而White Sisters的值（中等生存）具有不同的平均值（例如，高血细胞比容和血红蛋白和低钩虫，但身体状况低下）;这些模式表明，生理因素可能是群体生存差异的基础。

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