Habitat selection by kokanee salmon and smallmouth bass in thermally heterogeneous environments: The importance of growth maximization to diel habitat shifts

Technical Report · Tue May 01 00:00:00 EDT 1990

OSTI ID:6001781

Bevelhimer, M S

Diel habitat shifts consisting of vertical or horizontal movements are common in both marine and freshwater fishes. Hypothesis proposed to explain this behavior include maximizing food consumption, minimizing risk of predation, and maximizing bioenergetic efficiency. The bioenergetic hypothesis is often considered under conditions of thermal heterogeneity within the environment. The general objective of this study was to evaluate the importance of bioenergetic efficiency (i.e., maximization of net energy assimilation) as an influence on habitat selection and diel habitat shifts of two fishes. The vertical distribution and movement patterns of the planktivorous kokanee salmon (Oncorhynchus nerka) were monitored in Nantahala Lake, North Carolina, with vertical gill nets and hydroacoustics surveys. The daily movement patterns of adult smallmouth bass (Micropterus dolomieu) were monitored in Melton Hill Reservoir, Tennessee.

• Research Organization: Tennessee Univ., Knoxville, TN (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-76OR00033; AC05-84OR21400
• OSTI ID: 6001781
• Report Number(s): DOE/OR/00033-T458; ON: DE92004766
• Resource Relation: Other Information: Thesis (Ph.D.)
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
13 HYDRO ENERGY
54 ENVIRONMENTAL SCIENCES
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
HABITAT
DAILY VARIATIONS
SALMON
POPULATION DYNAMICS
BIOLOGICAL MODELS
DAMS
DIGESTION
FOOD
GILLS
LAKES
LIMNOLOGY
MATHEMATICAL MODELS
MIGRATION
NORTH CAROLINA
PREDATOR-PREY INTERACTIONS
SAMPLING
TEMPERATURE GRADIENTS
TENNESSEE
ZOOPLANKTON
ANADROMOUS FISHES
ANIMALS
AQUATIC ORGANISMS
DEVELOPED COUNTRIES
FEDERAL REGION IV
FISHES
NORTH AMERICA
PLANKTON
RESPIRATORY SYSTEM
SURFACE WATERS
USA
VARIATIONS
VERTEBRATES
550100* - Behavioral Biology
130600 - Hydro Energy- Environmental Aspects
540350 - Environment
Aquatic- Site Resource & Use Studies- (1990-)
990200 - Mathematics & Computers