Foraging Behavior of Hatchery-Produced Coho Salmon (Oncorhynchus kisutch) Smolts on Live Prey
Foraging Behavior of Hatchery-Produced Coho Salmon (Oncorhynchus kisutch) Smolts on Live Prey
复制标题
孵化场生产的银鲑鱼 (Oncorhynchus kisutch) 小鲑鱼对活猎物的觅食行为
DOI：
10.1139/f85-237
复制
发表时间：
1985
影响因子：
2.4
通讯作者：
B. L. Olla
中科院分区：
文献类型：
--
作者：
C. Paszkowski;B. L. Olla
我们提出了三组幼稚孵化场生产，颗粒饲养银鲑（Oncorhynchus kisutch）与活的，自然的猎物，并观察他们的觅食行为。26个人检查，20捕获一个或多个Crangon（沙虾）在1小时内，他们第一次接触到这些猎物。 六个老年人加速小鲑鱼（一岁以下）表现出改善觅食性能的经验，捕捉他们的第一个克兰贡早在他们的第二次，与他们的第一次，曝光。四个五这些鱼成功地捕获沙矛（Ammodytes hexapterus）在1小时内，他们的第一次介绍。 两组10个最近孵出的鱼种（<190 mm TL），一个加速和一个常规饲养（一岁鱼），用于选择实验，同时提供相等质量的Crangon和颗粒。 六个加速和七个传统饲养的鱼吃更多的克兰贡比颗粒，所有20条鱼在克兰贡比在颗粒更多的打击。我们的研究结果表明，…
We presented three groups of naive hatchery-produced, pellet-reared coho salmon (Oncorhynchus kisutch) with live, natural prey and observed their foraging behavior. Of 26 individuals examined, 20 captured one or more Crangon (sand shrimp) within 1 h of their first exposure to these prey. Six older accelerated smolts (underyearlings) displayed improved foraging performances with experience, capturing their first Crangon sooner during their second, compared with their first, exposure. Four of five of these fish successfully captured sand lance (Ammodytes hexapterus) within 1 h of their first presentation. Two groups of 10 recently smolted fingerlings (< 190 mm TL), one accelerated and one conventionally reared (yearlings), were used in choice experiments and simultaneously offered equal masses of Crangon and pellets. Six of the accelerated and seven of the conventionally reared fish ate larger amounts of Crangon than pellets, with all 20 fish striking more at Crangon than at pellets. Our results suggest tha...