Low-temperature dormancy in fish

1984 ◽  
Vol 246 (4) ◽  
pp. R479-R486 ◽  
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.

scholarly journals Walleye recruitment success is less resilient to warming water temperatures in lakes with abundant largemouth bass populations

2018 ◽  
Vol 75 (1) ◽  
pp. 106-115 ◽  
Author(s):  
Gretchen J.A. Hansen ◽  
Stephen R. Midway ◽  
Tyler Wagner
Keyword(s):  
Largemouth Bass ◽  
Micropterus Salmoides ◽  
Degree Days ◽  
Large Lakes ◽  
Recruitment Success ◽  
Annual Water ◽  
Catch Rates ◽  
The Relationship ◽  
Annual Water Temperature ◽  
Specific Food

Lakes respond heterogeneously to climate, with implications for fisheries management. We analyzed walleye (Sander vitreus) recruitment to age-0 in 359 lakes in Wisconsin, USA, to (i) quantify the relationship between annual water temperature degree days (DD) and walleye recruitment success and (ii) identify the influence of lake characteristics — area, conductivity, largemouth bass (Micropterus salmoides) catch rates, and mean DD — on this relationship. The relationship between walleye recruitment and annual DD varied among lakes and was not distinguishable from zero overall (posterior mean = −0.11, 90% CI = −0.34, 0.15). DD effects on recruitment were negative in 198 lakes (55%) and positive in 161 (45%). The effect of annual DD was most negative in lakes with high largemouth bass densities, and, on average, the probability of recruitment was highest in large lakes with low largemouth bass densities. Conductivity and mean DD influenced neither recruitment nor the effect of annual DD. Walleye recruitment was most resilient to warming in lakes with few largemouth bass, suggesting that the effects of climate change depend on lake-specific food-web and habitat contexts.

scholarly journals Coarse woody habitat does not predict largemouth bass young of year mortality during the open-water season

2019 ◽  
Vol 76 (6) ◽  
pp. 998-1005 ◽  
Author(s):  
Jacob P. Ziegler ◽  
Colin J. Dassow ◽  
Stuart E. Jones ◽  
Alexander J. Ross ◽  
Christopher T. Solomon
Keyword(s):  
Mortality Rate ◽  
Freshwater Fish ◽  
Largemouth Bass ◽  
Micropterus Salmoides ◽  
Open Water ◽  
Mortality Rates ◽  
In Situ Tests ◽  
Coarse Woody Habitat ◽  
The Relationship

Littoral structure is often assumed to provide refuge to young of year (YOY) freshwater fish species, but empirical in situ tests of this relationship are lacking. We estimated mortality rates of YOY largemouth bass (Micropterus salmoides) over the open-water season in 13 lakes in northern Wisconsin and Michigan using repeated snorkel surveys. Our goal was to test the hypothesis that mortality rate is negatively related to the abundance of littoral coarse woody habitat, which ranged from 3 to 1500 pieces of wood per kilometre of shoreline in these lakes. Instantaneous mortality rates were well-constrained and ranged from 0.04 to 0.19 among the 13 lakes. Mortality was not related to coarse woody habitat abundance. Our results suggest that the relationship between coarse woody habitat and YOY mortality might not be as strong or universal as is often assumed.

Effect of Temperature and Feeding Rate on the Liver–Somatic Index of the Largemouth Bass, Micropterus salmoides

1977 ◽  
Vol 34 (5) ◽  
pp. 633-638 ◽  
Author(s):  
Roy C. Heidinger ◽  
Steven D. Crawford
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Largemouth Bass ◽  
Micropterus Salmoides ◽  
Liver Weight ◽  
Effect Of Temperature ◽  
Lepomis Cyanellus ◽  
Feeding Regime ◽  
Liver Somatic Index ◽  
Somatic Index

At a controlled food intake level after 14 days at a given feeding regime, the liver–somatic index (liver weight as a percentage of body weight) of largemouth bass, Micropterus salmoides, was positively correlated with daily food intake. At temperatures of 20.0 and 28.0 °C there was no overlap in the ranges of the liver–somatic index of bass fed 0, 2, and 4% of their body weight in live green sunfish (Lepomis cyanellus) per day. Within a given feeding regime, increased temperature lowered the liver–somatic index.

Mechanisms of Acid-Base Adjustment in Dogfish (Scyliorhinus Stellaris) Subjected to Long-Term Temperature Acclimation

1980 ◽  
Vol 85 (1) ◽  
pp. 89-98
Author(s):  
N. HEISLER ◽  
P. NEUMANN ◽  
G. F. HOLETON
Keyword(s):  
Temperature Acclimation ◽  
Temperature Adaptation ◽  
Acclimation Temperature ◽  
Acid Base ◽  
Temperature Changes ◽  
Base Parameters ◽  
Intracellular Compartments ◽  
Relationship Of ◽  
The Relationship

Specimens of Larger Spotted Dogfish (Scyliorhinus stellaris) were acclimated to a range of temperatures for 22–28 days. The relationships of pH to acclimation temperature in the extracellular space and in three intracellular compartments were essentially the same as previously observed in 24 h acclimated dogfish (Heisler, Weitz & Weitz, 1976). In dogfish subjected to elevated inspired PCO2 during acclimation to low temperature, there was an inversion in the relationship of acclimation temperature to plasma PCO2, and in that to plasma bicarbonate, whereas the relationships to pH values were unchanged. It is concluded that the temperature adaptation of the acid-base parameters is complete after 24 h of temperature acclimation. At least the following mechanisms are involved in the adjustment of pH with changes of temperature: changes of PCO2, changes of buffer pK values, and transmembrane transfer of bicarbonate. Apparently only one of them, the transmembrane transfer of bicarbonate, can be modulated in a sufficient range and is responsible for the final pH adjustment.

Apparent Specific Dynamic Action of Largemouth Bass, Micropterus salmoides

1974 ◽  
Vol 31 (11) ◽  
pp. 1763-1769 ◽  
Author(s):  
F. W. H. Beamish
Keyword(s):  
Body Weight ◽  
Oxygen Consumption ◽  
Food Intake ◽  
Largemouth Bass ◽  
Micropterus Salmoides ◽  
Specific Dynamic Action ◽  
Feeding Level ◽  
Dynamic Action ◽  
Time Required ◽  
Ration Size

Oxygen consumption attributable to apparent specific dynamic action (SDA) was measured in relation to feeding level and body weight in largemouth bass, Micropterus salmoides, forced to swim at 1.7 body lengths/s (BL/s). Apparent SDA rose curvilinearly with ration size, the coefficient increasing with weight of bass. For a ration of fixed percent body weight/day, apparent SDA increased curvilinearly with weight of bass, the rate being most pronounced at higher levels of food intake. Apparent SDA expressed in energy units as a percent of ration ingested did not differ significantly with weight of fish or meal size. The overall mean apparent SDA ± SD was 14.19 ± 4.19% of the energy ingested. Time required for oxygen consumption to subside to pre-feeding levels increased with ration size and weight of bass.Over the range of swimming speeds from 1.4 to 2.5 BL/s, there were no differences in apparent SDA of similar size bass fed a ration of 4% body weight/day. Similarly, time for elevated levels of oxygen consumption to return to prefeeding rates was independent of swimming speed.

Experimental whole-lake dissolved organic carbon increase alters fish diet and density but not growth or productivity

2018 ◽  
Vol 75 (11) ◽  
pp. 1859-1867 ◽  
Author(s):  
Shuntaro Koizumi ◽  
Nicola Craig ◽  
Jacob A. Zwart ◽  
Patrick T. Kelly ◽  
Jacob P. Ziegler ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Largemouth Bass ◽  
Micropterus Salmoides ◽  
Experimental Tests ◽  
Fish Diet ◽  
Preferred Habitat ◽  
Doc Concentration ◽  
The Relationship ◽  
Fish Productivity

Negative relationships between dissolved organic carbon (DOC) concentration and fish productivity have been reported from correlative studies across lakes, but to date there have not been experimental tests of these relationships. We increased the DOC concentration in a lake by 3.4 mg·L−1, using a before–after control–impact design, to quantify the effects on the productivity and population structure of largemouth bass (Micropterus salmoides). Greater DOC reduced the volume of the epilimnion, the preferred habitat of largemouth bass, resulting in increased bass density. The likelihood that adult bass had empty diets decreased despite this increase in bass density; diet composition also changed. There was no apparent change in bass growth or condition. Overall, there was no net change in largemouth bass productivity. However, changes in young of year and juvenile recruitment and feeding success suggest the possibility that future effects could occur. Our results are the first to examine the effects of an increase in DOC on fish productivity through a 5-year temporal lens, which demonstrates that the relationship between DOC and fish productivity is multidimensional and complex.

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