THERMAL REQUIREMENTS OF THE BONYTAIL (GILA ELEGANS): APPLICATION TO PROPAGATION AND THERMAL-REGIME MANAGEMENT OF RIVERS OF THE COLORADO RIVER BASIN

被引：11

作者：

Kappenman, Kevin M. ^{[1
]}

Cureton, Elijah S. ^{[1
]}

Ilgen, Jason ^{[1
]}

Toner, Matt ^{[1
]}

Fraser, William C. ^{[1
]}

Kindschi, Greg A.

机构：

[1] US Fish & Wildlife Serv, Bozeman Fish Technol Ctr, 4050 Bridger Canyon Rd, Bozeman, MT 59715 USA

来源：

SOUTHWESTERN NATURALIST | 2012年 / 57卷 / 04期

关键词：

PERCH PERCA-FLAVESCENS; RAZORBACK SUCKERS; OVERWINTER MORTALITY; ENDANGERED BONYTAILS; WATER TEMPERATURE; NATIVE FISHES; GROWTH; SURVIVAL; SIZE; POPULATION;

D O I：

10.1894/0038-4909-57.4.421

中图分类号：

X176 [生物多样性保护];

学科分类号：

090705 ;

摘要：

We performed experimental trials on hatchery-reared juvenile bonytails (Gila elegans) using the acclimated-chronic-exposure method. Bonytails were exposed to 8-30 degrees C for 112 days to determine effects on growth, condition factor, composition of body, and survival. Survival was >= 98% for all treatments. The predicted temperature was 25.9 degrees C for maximum gain in weight and 14.2 degrees C for zero gain. Temperatures <14 degrees C depressed growth, 14-20 degrees C provided incremental growth, and 22-26 degrees C allowed accelerated growth. We hypothesize that temperatures during propagation and seasonal temperatures of rivers that are 22-26 degrees C, or both, would maximize growth of juveniles and might promote higher survival because bonytails would be less vulnerable to predation, and have greater energy reserves and increased metabolic efficiency.

引用

页码：421 / 429

页数：9