Critical thermal maximum (CTmax) and hematology of shortnose sturgeons (Acipenser brevirostrum) acclimated to three temperatures

2014 ◽  
Vol 92 (3) ◽  
pp. 215-221 ◽  
Author(s):  
Yueyang Zhang ◽  
James D. Kieffer
Keyword(s):  
Thermal Stress ◽  
Eastern Coast ◽  
Acclimation Temperature ◽  
Critical Thermal Maximum ◽  
Shortnose Sturgeon ◽  
Thermal Biology ◽  
Acipenser Brevirostrum ◽  
Future Studies ◽  
Thermal Maximum ◽  
Biological Impacts

Quantifying a species thermal tolerance is critical to assessing biological impacts of anticipated increases in temperature (e.g., climate change). Although many studies have documented the critical thermal maximum (CTmax) of fish, there is a paucity of research on thermal biology of sturgeon. The shortnose sturgeon (Acipenser brevirostrum LeSueur, 1818) is a threatened species that exists along the eastern coast of North America. They can be exposed to temperatures ranging from freezing to above 25 °C. Using a heating rate of 6 °C/h, CTmax and the associated hematological responses of shortnose sturgeon acclimated to 10, 15, and 20 °C were determined. There was a significant positive relationship between CTmax and body mass, and CTmax increased significantly with increases in acclimation temperature (Ta). In general, hematology of thermally stressed fish was modified relative to control (nonstressed) fish. Hematocrit, plasma lactate, and plasma Na+ and Cl– of fish were all significantly influenced by thermal stress and Ta. Glucose and K+ were only significantly influenced by thermal stress. Future studies should address the importance of other stressors, such as salinity and toxicants, on thermal relationships of sturgeon.

scholarly journals The effects of repeat acute thermal stress on the critical thermal maximum (CTmax) and physiology of juvenile shortnose sturgeon (Acipenser brevirostrum)

2019 ◽  
Vol 97 (6) ◽  
pp. 567-572
Author(s):  
Brittany Bard ◽  
James D. Kieffer
Keyword(s):  
Thermal Stress ◽  
Thermal Tolerance ◽  
Thermal Stresses ◽  
Recovery Period ◽  
Critical Thermal Maximum ◽  
Shortnose Sturgeon ◽  
Acipenser Brevirostrum ◽  
Time Period ◽  
Thermal Maximum ◽  
Plasma Chloride

The shortnose sturgeon (Acipenser brevirostrum Lesueur, 1818) is a species of special concern in Canada, but little is known about their thermal biology. Information on the upper thermal tolerance of shortnose sturgeon becomes valuable for predicting future survival particularly with climate change and improving species management. Using a modified critical thermal maximum (CTmax) methodology, the objective is to determine whether previous thermal stress affects the thermal tolerance of juvenile shortnose sturgeon when exposed to a second thermal stress event. Prior exposure to thermal stress (CTmax1) did not affect the thermal tolerance (CTmax2) of juvenile shortnose sturgeon when a 24 h recovery period was allotted between tests. However, a significant increase in thermal tolerance occurred when the recovery time between the two thermal challenges was 1 h. Plasma glucose, lactate, and osmolality were all significantly affected by thermal stress, but values returned to control levels within 24 h. Hematocrit and plasma chloride concentrations were not significantly affected by thermal stress. All fish survived the CTmax testing. The data indicate that the thermal tolerance of juvenile shortnose sturgeon is modified when multiple thermal stresses occur closer together (1 h) but not if separated by a longer time period (24 h).

scholarly journals Effects of warming rate, acclimation temperature and ontogeny on the critical thermal maximum of temperate marine fish larvae

PLoS ONE ◽  
2017 ◽  
Vol 12 (7) ◽  
pp. e0179928 ◽  
Author(s):  
Marta Moyano ◽  
Caroline Candebat ◽  
Yannick Ruhbaum ◽  
Santiago Álvarez-Fernández ◽  
Guy Claireaux ◽  
...  
Keyword(s):  
Marine Fish ◽  
Fish Larvae ◽  
Acclimation Temperature ◽  
Critical Thermal Maximum ◽  
Marine Fish Larvae ◽  
Thermal Maximum ◽  
Warming Rate

scholarly journals Growth, thermal preference and critical thermal maximum for Totoaba macdonaldi: effect of acclimation temperature and inclusion of soybean meal in the diet

2021 ◽  
Vol 49 (2) ◽  
pp. 258-271
Author(s):  
Eloy Eduardo Yen Ortega ◽  
Juan Gabriel Correa Reyes ◽  
Mónica Hernández Rodríguez
Keyword(s):  
Weight Gain ◽  
Soybean Meal ◽  
Biological Indicators ◽  
Acclimation Temperature ◽  
Critical Thermal Maximum ◽  
Preferred Temperature ◽  
Thermal Maximum ◽  
Diet Control ◽  
Totoaba Macdonaldi ◽  
Species Performance

We studied the interaction effect between temperature 23 and 26°C, and replacing fishmeal for soybean meal (SBM): 32, 43, and 56% vs. a diet control on culture performance, thermal behavior, and critical thermal maximum (CTMax) of juvenile Totoaba macdonaldi. Fish were fed to apparent satiation three times daily for 61 days. The results showed that temperature had a significant effect (P < 0.05) on weight gain, percent weight gain, and specific growth rate, which were all higher in fish acclimated at 26°C. The preferred temperature ranged between 26.4 and 27.7°C, significantly influenced by acclimation temperature (P < 0.05) but not by diet. CTMax was influenced by acclimation temperature and SBM in the diet. Fish resistance decreased when the percent SBM in the diet was higher. Information on biological indicators for T. macdonaldi adds to the knowledge of a key Mexican species. Our study demonstrated that the use of SBM as an alternative to fishmeal in the diet and the interaction with temperature as a factor could affect this species' performance.

scholarly journals Temperature acclimation affects thermal preference and tolerance in three Eremias lizards (Lacertidae)

2009 ◽  
Vol 55 (4) ◽  
pp. 258-265 ◽  
Author(s):  
Hong Li ◽  
Zheng Wang ◽  
Wenbin Mei ◽  
Xiang Ji
Keyword(s):  
High Temperatures ◽  
Low Temperatures ◽  
Temperature Acclimation ◽  
Acclimation Temperature ◽  
Critical Thermal Maximum ◽  
Thermal Preference ◽  
Lower Body ◽  
Adult Males ◽  
Thermal Maximum ◽  
Selected Body Temperature

Abstract We acclimated adult males of three Eremias lizards from different latitudes to 28°C, 33 °C or 38°C to examine whether temperature acclimation affects their thermal preference and tolerance and whether thermal preference and tolerance of these lizards correspond with their latitudinal distributions. Overall, selected body temperature (Tsel) and viable temperature range (VTR) were both highest in E. brenchleyi and lowest in E. multiocellata, with E. argus in between; critical thermal minimum (CTMin) was highest in E. multiocellata and lowest in E. brenchleyi, with E. argus in between; critical thermal maximum (CTMax) was lower in E. multiocellata than in other two species. Lizards acclimated to 28°C and 38 °C overall selected lower body temperatures than those acclimated to 33°C; lizards acclimated to high temperatures were less tolerant of low temperatures, and vice versa; lizards acclimated to 28 °C were less tolerant of high temperatures but had a wider VTR range than those acclimated to 33°C and 38°C. Lizards of three species acclimated to the three temperatures always differed from each other in CTMin, but not in Tsel, CTMax and VTR. Our results show that: temperature acclimation plays an important role in influencing thermal preference and tolerance in the three Eremias lizards, although the degrees to which acclimation temperature affects thermal preference and tolerance differ among species; thermal preference rather than tolerance of the three Eremias lizards corresponds with their latitudinal distributions.

Evaluation of four methods of transmitter attachment on shortnose sturgeon, Acipenser brevirostrum

2002 ◽  
Vol 18 (4-6) ◽  
pp. 491-494 ◽  
Author(s):  
M. R. Collins ◽  
D. W. Cooke ◽  
T. I. J. Smith ◽  
W. C. Post ◽  
D. C. Russ ◽  
...  
Keyword(s):  
Shortnose Sturgeon ◽  
Acipenser Brevirostrum

Critical thermal maximum in mice

1976 ◽  
Vol 40 (5) ◽  
pp. 683-687 ◽  
Author(s):  
G. L. Wright
Keyword(s):  
Heat Stress ◽  
Cooling Capacity ◽  
Heating Time ◽  
Critical Thermal Maximum ◽  
Thermal Limit ◽  
Ambient Temperatures ◽  
Thermal Maximum ◽  
Righting Reflex ◽  
Colonic Temperature ◽  
Extended Exposure

The critical thermal maximum (the colonic temperature of heat-induced convulsion and righting reflex loss) and thermoregulatory response of male mice were examined following I, exposure to colonic temperature (Tco) 42 degrees C; II, a single exposure to the critical thermal maximum (Tco 44 degrees C); AND III, acclimation at ambient temperatures of 15 or 30 degrees C for 14 days. The critical thermal maximum (CTM) was greater in 30 degrees C acclimated mice than 15 degrees C acclimated mice but was unchanged in mice surviving exposure to Tco 42 degrees C or the CTM. The heating time to apparent breakdown of thermoregulation coincident with an explosive rise in the Tco during exposure to ambient temperature 40.8 degrees C was increased (100%) during the 48-h period following exposure to Tco 42 degrees. It appeared that mice exposed to severe, short-term heat stress (Tco 42 degrees) undergo a compensatory increase in their thermoregulatory cooling capacity with little or no change in the upper temperature tolerated. The animals did, however, exhibit the capability for adaptive adjustments of the upper thermal limit during extended exposure to the more prolonged and less severe environmental heat stress of acclimation at 30 degrees C.

scholarly journals Water temperature affects aggressive interactions in a Neotropical cichlid fish

2018 ◽  
Vol 16 (1) ◽  
Author(s):  
Manuela L. Brandão ◽  
Gisele Colognesi ◽  
Marcela C. Bolognesi ◽  
Roselene S. Costa-Ferreira ◽  
Thaís B. Carvalho ◽  
...  
Keyword(s):  
Aggressive Behavior ◽  
Water Temperature ◽  
Elevated Temperatures ◽  
Cichlid Fish ◽  
Aquatic Organisms ◽  
Swimming Activity ◽  
Critical Thermal Maximum ◽  
Physiological Mechanisms ◽  
Aggressive Interactions ◽  
Thermal Maximum

ABSTRACT Changes in water temperature may affect the aggressive behavior of aquatic organisms, such as fish, either by changing some physiological mechanisms or by increasing the probability of encounters between individuals as a result of variation in their swimming activity. In our study, we evaluated the influence of increasing and decreasing temperature on the aggressive behavior of the Neotropical cichlid fish Cichlasoma paranaense. Firstly, we tested the critical thermal maximum (CTMax) tolerated by this species. Then, we tested the effect of decreasing or increasing the water temperature in 6o C (starting at 27° C) on the aggressive interactions of fish under isolation or housed in groups. We found a CTMax value of 39° C for C. paranaense. We also observe that a 6° C decrease in water temperature lowers swimming activity and aggressive interactions in both isolated and group-housed fish, as expected. On the other hand, the increase in temperature had no effect on the fish’s aggressive behavior, neither for isolated nor for grouped fish. We concluded that C. paranaense shows high tolerance to elevated temperatures and, in turn, it does not affect aggressive behavior. Nevertheless, we cannot dismiss possible effects of elevated temperatures on aggressive interactions over longer periods.

Overwintering habitat use of shortnose sturgeon (Acipenser brevirostrum): defining critical habitat using a novel underwater video survey and modeling approach

2007 ◽  
Vol 64 (9) ◽  
pp. 1248-1257 ◽  
Author(s):  
Xinhai Li ◽  
Matthew K Litvak ◽  
John E. Hughes Clarke
Keyword(s):  
Habitat Use ◽  
Linear Models ◽  
Video Camera ◽  
Sampling Procedure ◽  
Shortnose Sturgeon ◽  
Underwater Video ◽  
Camera System ◽  
Critical Habitat ◽  
Acipenser Brevirostrum ◽  
Modeling Approach

The overwintering habitat use of shortnose sturgeon (Acipenser brevirostrum) was investigated from January to March 2005 in the upper Kennebecasis River, New Brunswick, Canada, using a novel underwater video camera system and modeling approach. Following a random sampling procedure, 187 holes were drilled into the ice, and 234 sturgeon were counted and video-recorded. We found that sturgeon concentrated in a 2 ha area at the confluence of the Kennebecasis and Hammond rivers on a flat sandy substrate at a depth of 3.1–6.9 m. Generalized linear models were developed to describe the relationship of shortnose sturgeon density and habitat variables. The model indicated that the shortnose sturgeon had significant preference to deeper areas within this region. The total abundance of shortnose sturgeon in the area was estimated to be 4836 ± 69 (mean ± standard error) using the ordinary kriging method to interpolate sturgeon density at unsampled sites. This overwintering habitat of shortnose sturgeon can be defined as critical habitat following the identification policies of the Canadian Species at Risk Act (SARA).

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