Thermal tolerance of a northern population of striped bass Morone saxatilis

Abstract

Thermal tolerance of age 0þ year Shubenacadie River (Nova Scotia, Canada) striped bass Morone saxatilis juveniles (mean AE S.E. fork length, L F , 19Á2 AE 0Á2 cm) acclimated in fresh water to six temperatures from 5 to 30°C was measured by both the incipient lethal technique (72 h assay), and the critical thermal method (C m ). The lower incipient lethal temperature ranged from 2Á4 to 11Á3°C, and the upper incipient lethal temperature (I U ) from 24Á4 to 33Á9°C. The area of thermal tolerance was 618°C 2 . In a separate experiment, the I U of large age 2þ year fish (34Á4 AE 0Á5 cm L F ) was 1Á2 and 0Á6°C lower (P < 0Á01) than smaller age 1þ year fish (21Á8 AE 0Á5 cm L F ) at acclimation temperatures of 16 and 23°C. Using the C m , loss of equilibrium occurred at 27Á4-37Á7°C, loss of righting response at 28Á1-38Á4°C and onset of spasms at 28Á5-38Á8°C, depending on acclimation temperature. The linear regression slopes for these three responses were statistically similar (0Á41; P > 0Á05), but the intercepts differed (25Á3, 26Á0 and 26Á5°C; P < 0Á01). The thermal tolerance of this northern population appears to be broader than southern populations.

Diel Behavior of Adult Striped Bass Using Tailwater Habitat as Summer Refuge

“…The minimum water temperature available in the study area during any diel-tracking event was at most 1.18C higher at the end of the generation period than that at the end of pumped storage period (i.e., an increase from 17.98C to 19.08C during the first event in 2004). Adult striped bass should tolerate a daily change of 1.18C without negative physiological consequences (Cooke et al 2006), especially given the opportunity for behavioral thermoregulation within the tailwater. Water temperatures less than 248C were always present in the study area during each diel-tracking event across both STRIPED BASS DIEL BEHAVIOR summers.…”

Effects of holding temperature and handling stress on the upper thermal tolerance of threadfin shad Dorosoma petenense

“… Thermal tolerance polygons for Dorosoma petenense [, area = 419° C 2 , data from current manuscript, Strawn (1965) and Griffith (1978) Hypomesus transpacificus ], [, area = 349° C 2 , data from Swanson & Cech (1995)] and 10 non‐native species resident to the Sacramento–San Joaquin Delta, California (, area = 647° C 2 ). Non‐native SSJD fish thermal tolerance polygons were developed with data from Ictalurus punctatus (Currie et al , 1998; Diaz & Buckle, 1999), Carassius auratus (Ford & Beitinger, 2005), Micropterus salmoides (Guest, 1985; Currie et al , 1998), Morone saxatilis (Lutterschmidt & Hutchinson, 1997 b ; Cook et al , 2006), Cyprinella lutrensis (Matthews & Maness, 1979; King et al , 1985; Smale & Rabeni, 1995; Lutterschmidt & Hutchinson, 1997 b ; Carveth et al , 2006), Pimephales promelas (Carrier & Beitinger, 1988), Lepomis macrochirus (Holland et al , 1974; Dent & Lutterschmidt, 2003; Carveth et al , 2006), Notemigonus crysoleucas (Lutterschmidt & Hutchinson, 1997 b ), Menidia beryllina (Lutterschmidt & Hutchinson, 1997 b ) and Lepomis cyanellus (Smale & Rabeni, 1995; Carveth et al , 2006; Cortemeglia & Beitinger, 2008). …”

Life-history and thermal tolerance traits display different thermal plasticities and relationships with temperature in the marine polychaete Ophryotrocha labronica La Greca and Bacci (Dorvilleidae)

“…However, the positive correlation between heat tolerance and body size, as well as between heat tolerance and reproductive traits, has to be considered cautiously, as each variable was also positively correlated with temperature. Although body size has been recognised as a potential mechanism to face temperature changes (Clémencet et al, 2009;Cook et al, 2006;Gaston and Spicer, 1998), here we may assume that the correlations observed among these traits are determined by their relative relationship with temperature (i.e. a by-product of colinearity).…”