7921 ‎(2)‎

• UCREFRP Catalog Number: 7921
• Author: Trembly, T. L. and G. A. Gould.
• Title: Opportunities To Protect Instream Flows In Colorado And Wyoming.
• USFW Year: 1987.
• USFW - Doc Type: Biological Report 87‎(10)‎,
• Copyright Material: NO

Summer habitat selected by adults in Tennessee Reservoirs indicates an
average occupied temperature near 20° C (68° F) when warmer, oxygenated waters
were available (Schaich 1979; Waddle 1979; Cheek 1982). Adults were found to
occupy cool-water refuges (21.0° C; 69.8° F) in the Apalachicola River,
Florida, during summer while surface water temperatures rose to 31° C (87.8° F)
(Crateau et al. 1981; Wooley and Crateau 1983). It appears that the
temperature niche for adult striped bass in lacustrine habitat may vary by
several degrees (Crance 1985). This may be due to a number of factors,
including experimental variability, differences among fish stocks, geographic
location, age of fish, and the ranges of water temperature and dissolved
oxygen concentration available to the fish.
Juvenile (temperature, V4~. Juvenile striped bass select and grow
optimally at higher temperatures than are optimal for eggs, larvae, or adults
(Cox and Coutant 198.1, 1985). Juveniles can tolerate temperatures from 3 to
34° C (37.4 to 93.2° F) (Davies 1970). About 34.4 to 35° C (94 to 95° F)
appears to be the upper lethal temperature range (Loeber 1951; Dorfman and
Westman 1970). Growth apparently ceases at about 33.5° C (92.3° F) (Cox and
Coutant 1981). Otwell and Merriner (1975) reported the greatest growth of
juveniles at 24° C (75.2° F), which is within the range of 23.0 to 26.0° C
(73.4 to 78.4° F) indicated as optimal for growth by Cox and Coutant (1981).
Kellog and Gift (1983) reported that 26.9 to 30.3° C (80.5 to 86.6° F) was the
optimum growth temperature range for striped bass that were 8.7 mm and 28.9 mm
long at the start and end of the test period, respectively. However, it was
reported that juveniles held in brackish water ponds in Alabama at 12 mg/1
salinity and 33° C (91.4° F) actively fed and grew well (Crance 1985).
Larval (temperature, Vl~. Temperature requirements of striped bass
larvae in lacustrine habitat are assumed to be equal to temperature require-
ments of larvae in riverine habitat. However, once larvae reach the lacustrine
habitat, they are generally a few days older and are likely to survive and do
well at slightly higher temperatures than they do at a younger age in riverine
habitat.
Dissolved oxygen concentration (UZ~. Dissolved oxygen concentration
requirements for all life stages of striped bass are assumed to be equal
whether they occur in lacustrine or riverine habitat.
Adult (dissolved oxygen, VZ~. Refuges most frequently occupied by adults
in Cherokee Reservoir, Tennessee, had 5 mg/1 or more dissolved oxygen (Schaich
1979; Waddle 1979).
Juvenile (dissolved oxygen, UZ~. Krouse (1968) observed no mortality of
juveniles (2.8 to 13.0 cm TL; 1 to 4.4 inches) after 72 hours exposure to
5.0 mg/1 dissolved oxygen. Mortality increased at 3.0 mg/1, and no fish
survived at 1.0 mg/1. Chittenden (1971b) concluded that about 3.0 mg/1 at
16.0° C (60.8° F) probably represents the minimum oxygen concentration for
normal existence of juveniles and that 3.0 mg/1 may be insufficient to maintain
optimum populations of the species. Dorfman and Westman (1970) and Klyashtorin
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