Density-dependent survival as a function of size in juvenile salmonids in streams
Density-dependent survival as a function of size in juvenile salmonids in streams
复制标题
溪流中鲑鱼幼鱼的密度依赖性生存与大小的关系
DOI：
10.1139/f95-013
复制
发表时间：
1995
影响因子：
2.4
通讯作者：
L. Crowder
中科院分区：
文献类型：
--
作者：
E. Marschall;L. Crowder
利用密度、食物可利用性和个体大小之间的关系，对食物有限的溪流系统中幼鱼密度依赖性生存的生物能量机制进行了建模。与消耗率函数估计从实验室实验中的文献报道，我们开发了一个函数来预测最大密度的流居民少年鲑不同大小。因此，该函数可以根据鱼的数量和大小预测有效密度。从这个机械功能的密度预测并没有不同的预测文献中的经验得出的功能描述的最小领土大小和身体大小之间的关系在年龄为0鲑鱼在流，但它确实表明了这些关系的生物能量机制，连接大小和消费率的可用食物。最后，我们提出了一个模型的人均存活率作为一个函数的数量和大小在一个队列的流居民少年鲑鱼。
The bioenergetic mechanism of density-dependent survival in juvenile stream salmonids was modeled using the relationship between density, food availability, and body size for a food-limited stream system. With a consumption-rate function estimated from laboratory experiments reported in the literature, we developed a function to predict maximum density of stream-resident juvenile salmonids of different sizes. This function can thus predict effective density based on both numbers and sizes of fish. Density predictions from this mechanistic function did not differ from predictions in the literature based on an empirically derived function describing the relationship between minimum territory size and body size in age-0 salmonids in streams, but it did suggest a bioenergetic mechanism for these relationships, linking size and consumption rate to the available food. Finally, we proposed a model of per capita survival rate as a function of the numbers and sizes in a cohort of stream-resident juvenile salmonids.