Acclimation temperature and temperature tolerance in fingerling largemouth bass (Micropterus salmoides)

Genetic differences exist among 90 largemouth bass (Micropterus salmoides) populations from different geographic regions of the United States. Genetic variation at 28 loci was determined through the use of vertical starch gel electrophoretic analyses. Allelic polymorphism was observed at 16 of these loci. Marked differences in allele frequencies at six of these loci exist among the populations. Distinct north–south clinal distributions of the alleles at the MDH-B, SOD-A, IDH-B, and AAT-B loci suggest a possible involvement of the associated enzymes in the thermal tolerance/preference limits for this species.We conclude that one or more of these enzymes may be directly involved in temperature tolerance/preference or indirectly associated with temperature-related effects. In either instance, selection (if occurring) may be acting upon the enzyme locus or genes closely linked to it. Through a combination of ecological and genetic principles, it is becoming increasingly feasible to select or construct specific populations of marine or freshwater fish optimally suited for specific environments. Fisheries management programs would benefit from the application of these principles. Multidisciplinary approaches of this nature are essential to maximize the successful conservation and management of our natural resources.Key words: largemouth bass, allele, loci, polymorphism, selection, population

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Low-temperature dormancy in fish

AJP Regulatory Integrative and Comparative Physiology ◽

10.1152/ajpregu.1984.246.4.r479 ◽

1984 ◽

Vol 246 (4) ◽

pp. R479-R486 ◽

Cited By ~ 11

Author(s):

L. I. Crawshaw

Keyword(s):

Food Intake ◽

Ambient Temperature ◽

Largemouth Bass ◽

Breathing Pattern ◽

Brain Temperature ◽

Micropterus Salmoides ◽

Acclimation Temperature ◽

Acid Base ◽

Ictalurus Nebulosus ◽

The Relationship

The importance of low ambient temperature in the physiology of winter dormancy was studied in the brown bullhead (Ictalurus nebulosus) and the largemouth bass (Micropterus salmoides). The bullheads frequently entered a sleep-like state at low temperatures; the likelihood of being aroused from this state was inversely proportional to the ambient temperature. Spontaneous activity for both species was relatively constant from 17 to 7 degrees C; at lower temperatures activity decreased. The selected temperature was lowered in both species as a consequence of acclimation to 3 degrees C; if given the opportunity, fish of both species moved to temperatures above 25 degrees C within 1 day in spite of the consequent acid-base and metabolic imbalances. In bass, food intake was very low for acclimation temperatures of 8 degrees C and below; at higher temperatures the relationship between food intake and acclimation temperature required 4 wk to stabilize. Quiescent brown bullheads exhibited discontinuous breathing. Alteration of brain temperature with implanted thermodes indicated that the main locus of control of this breathing pattern is in the medulla; lesser influences emanate from the anterior hypothalamus and the midbrain. Metabolism was measured at a series of acclimation temperatures between 3 and 17 degrees C for both species. No evidence of a discontinuous function (metabolic shutdown) was seen for either species.

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The role of acclimation temperature in the induction of torpidity in the largemouth bass (Micropterus salmoides)

Cryobiology ◽

10.1016/0011-2240(81)90020-1 ◽

1981 ◽

Vol 18 (1) ◽

pp. 87-88

Author(s):

D.E. Lemons ◽

L.I. Crawshaw

Keyword(s):

Largemouth Bass ◽

Micropterus Salmoides ◽

Acclimation Temperature

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Temperature and Scale Size Errors in the Use of [14C]Glycine Uptake by Scales as a Growth Index

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f82-184 ◽

1982 ◽

Vol 39 (10) ◽

pp. 1366-1372 ◽

Cited By ~ 4

Author(s):

Carl M. Smagula ◽

Ira R. Adelman

Keyword(s):

Largemouth Bass ◽

Incubation Temperature ◽

Micropterus Salmoides ◽

Response Surfaces ◽

Body Growth ◽

Acclimation Temperature ◽

Surface Model ◽

Glycine Uptake ◽

Scale Size ◽

Uptake Data

Measurement of glycine uptake by largemouth bass (Micropterus salmoides) scales at several acclimation (14, 20, and 26 °C) and incubation (14–32 °C, 3 °C increments) temperatures revealed significant interaction between these factors (P < 0.005). Therefore, comparison of uptake data from several acclimation groups could not be made at any arbitrary "standard" incubation temperature without introducing error. An error-free scale incubation criterion was tentatively proposed as optimum incubation temperature for each fish acclimation temperature, determined from a laboratory response surface model. Incubation temperature of maximum uptake was associated with temperature of maximum body growth of bass which suggests that uptake may be integrated with growth. Use of scale weight to express uptake relative to scale size will probably introduce systematic error, and scale area should provide the "best" measure for normalization of uptake data. Glycine uptake by 14, 20, and 26 °C acclimated scales was linearly related to body growth on a loge–loge basis (P < 0.05); however, within acclimation groups significant correlation was not noted.Key words: acclimation temperature, incubation temperature, response surfaces, largemouth bass, Micropterus salmoides

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