Cold, Northern Winters: The Importance of Temperature to Overwinter Mortality of Age-0 White Crappies
Cold, Northern Winters: The Importance of Temperature to Overwinter Mortality of Age-0 White Crappies
复制标题
寒冷的北方冬季：温度对 0 岁白鲈越冬死亡率的重要性
DOI：
10.1577/t02-118
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发表时间：
2003
影响因子：
1.4
通讯作者：
R. Stein
中科院分区：
文献类型：
--
作者：
A. McCollum;D. Bunnell;R. Stein
在生命的第一个冬天的生存会影响许多鱼类的招募。采用田间取样和室内实验相结合的方法，探讨了环斑Pomoxis环状波斑蝶（Pomoxis annularis）首次冬季生长和存活的机制。我们在冬季前从俄亥俄州的四个水库中采集了0岁的白垃圾，以评估大型个体是否比小型个体具有更高的能量密度（kJ/g），以及水库之间的平均能量密度是否存在差异。在所有的水库中，能量密度随着鱼的大小而增加，这表明如果能量储存在冬季变得有限，小鱼可能会更早死亡。不同储层的平均能量密度也不同，这表明冬前能量储备可能通过对冬季饥饿的影响影响储层的补充变异。我们的实验室实验评估了鱼的大小（小或大）、摄食水平（饥饿或喂食）和冬季严重程度（轻微或严重）如何相互作用，以影响…
Abstract Survival during the first winter of life can influence the recruitment of many fishes. We used field sampling and laboratory experiments to explore the mechanisms underlying first winter growth and survival of white crappie Pomoxis annularis, which exhibits variable recruitment. We sampled age-0 white crappies from four Ohio reservoirs before winter to evaluate whether large individuals had a greater energy density (kJ/g) than small ones and whether mean energy density differed among reservoirs. Energy density increased with fish size in all reservoirs, suggesting that small fish could die earlier if energy stores become limiting during winter. Mean energy density varied among reservoirs as well, suggesting that prewinter energy reserves could influence recruitment variability across reservoirs through their effects on winter starvation. Our laboratory experiment evaluated how fish size (small or large), feeding level (starved or fed), and winter severity (mild or severe) interact to influence th...