Thermal tolerance varies in tropical and sub-tropical populations of barramundi (Lates calcarifer) consistent with local adaptation

Newton, James R.; Smith-Keune, Carolyn; Jerry, Dean R.

doi:10.1016/j.aquaculture.2010.05.040

Cited by 30 publications

(23 citation statements)

References 12 publications

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“…The fish were left to recover in their holding tank for 2 days after which they were fed to satiation. Once post-absorptive (~48 h post-feeding; 4 days after initial trials), the same respirometry protocol was repeated at 38°C (temperature increased from 29°C at 2°C h −1 ) to establish SMR and MMR at a temperature approaching the assumed upper thermal limit of the species (see Katersky and Carter, 2005;Newton et al, 2010). An additional fish (M b =19.9 g) was included in the eighth respirometer for these subsequent experiments, as the initial measurements with an empty respirometer revealed only minor background respiration.…”

Section: Research Articlementioning

confidence: 99%

Aerobic scope does not predict the performance of a tropical eurythermal fish at elevated temperatures

Norin

Malte

Clark

2013

Journal of Experimental Biology

216

227

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Climate warming is predicted to negatively impact fish populations through impairment of oxygen transport systems when temperatures exceed those which are optimal for aerobic scope (AS). This concept of oxygen-and capacity-limited thermal tolerance (OCLTT) is rapidly gaining popularity within climate change research and has been applied to several fish species. Here, we evaluated the relevance of aerobic performance of juvenile barramundi (Lates calcarifer) in the context of thermal preference and tolerance by (1) measuring standard and maximum metabolic rates (SMR and MMR, respectively) and AS of fish acclimated to 29°C and acutely exposed to temperatures from 23 to 38°C, (2) allowing the fish to behaviourally select a preferred temperature between 29 and 38°C, and (3) quantifying alterations to AS after 5 weeks of acclimation to 29 and 38°C. SMR and MMR both increased continuously with temperature in acutely exposed fish, but the increase was greater for MMR such that AS was highest at 38°C, a temperature approaching the upper lethal limit (40-41°C). Despite 38°C eliciting maximum AS, when given the opportunity the fish selected a median temperature of 31.7±0.5°C and spent only 10±3% of their time at temperatures >36°C. Following acclimation to 38°C, AS measured at 38°C was decreased to the same level as 29°C-acclimated fish measured at 29°C, suggesting that AS may be dynamically modulated independent of temperature to accommodate the requirements of daily life. Together, these results reveal limited power of the OCLTT hypothesis in predicting optimal temperatures and effects of climate warming on juvenile barramundi.

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Section: Research Articlementioning

confidence: 99%

Aerobic scope does not predict the performance of a tropical eurythermal fish at elevated temperatures

Norin

Malte

Clark

2013

Journal of Experimental Biology

216

227

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“…A recent study by Newton et al (2010) demonstrated that barramundi from a similar tropical population (Darwin, NT) posses greater thermal tolerance than barramundi from a more southern sub-tropical population (Gladstone, QLD), ultimately separated by 11°of latitude. More specifically, time to loss of swimming equilibrium (LOSE) occurred significantly faster in sub-tropical (452.8 ± 8 min; mean ± SD) than tropical (518.5 ± 8 min) barramundi at 40°C (Newton et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…More specifically, time to loss of swimming equilibrium (LOSE) occurred significantly faster in sub-tropical (452.8 ± 8 min; mean ± SD) than tropical (518.5 ± 8 min) barramundi at 40°C (Newton et al 2010). The ratio of dead/live cells in heat stressed (40°C, 1 h) and dissociated caudal fin cells was also found to be 2.3 times higher in the sub-tropical barramundi and significantly correlated with mean time to LOSE (Newton et al 2010). These differences in upper thermal tolerance between similar tropical and sub-tropical barramundi populations are consistent with differences in mortality rate and mean U crit speed (at 35°C) observed in our low latitude (Darwin, NT) and high latitude (Bowen, QLD) populations (Edmunds et al 2010).…”

Section: Discussionmentioning

confidence: 99%

“…Two major genetic clades have been identified between the eastern (Queensland, QLD) and northern (Northern Territory, NT) coasts (Chenoweth et al 1998), as well as a third genetic clade encompassing the west coast (Western Australia, WA; Doupé et al 1999). Moreover, a tropical population (Darwin, NT) was recently shown to maintain swimming equilibrium 66 min longer than a subtropical population (Gladstone, QLD) when subjected to heat-stress (40°C) conditions, indicating population-specific tolerances to upper thermal limits (Newton et al 2010).…”

Section: Introductionmentioning

confidence: 99%

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Exposing local adaptation: synergistic stressors elicit population-specific lactate dehydrogenase-B (ldh-b) expression profiles in Australian barramundi, Lates calcarifer

et al. 2011

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The molecular response of fish to independently and/or concurrently applied ecological stressors (e.g. thermal and/or aerobic stress) can be quantified at the level of transcript abundance (i.e. gene expression). In temperate fish, the expression of the metabolic candidate gene lactate dehydrogenase-B (ldh-b) responds to both aerobic swimming challenge and extended acclimation to various ecologically relevant temperatures. We examined hepatic ldh-b expression in juvenile Lates calcarifer from two geographically, genetically and thermally distinct Australian populations to determine if similar environmental stressors also influence the transcription of this locus in a tropical fish. Hepatic ldh-b expression was quantified following 28-day acclimation to ecologically relevant temperatures (20, 25, 30 and 35°C). Expression was also quantified in L. calcarifer subjected to aerobic swimming challenge at these temperatures. Fish from southern (high latitude) and northern (low latitude) populations within this species' Australian distribution exhibited a significant increase in hepatic ldh-b expression following aerobic swimming challenge at native temperatures of 25 and 30°C, respectively (p \ 0.001). Southern and northern fish also exhibited significant increase in hepatic ldh-b expression (p \ 0.001 and p \ 0.01, respectively) following 28-day acclimation to heat-stress (35°C). However, only southern fish exhibited significant increase in expression (p \ 0.001) following 28-day acclimation to cold-stress (20°C). The novel evidence presented herein suggests that (a) transcription of hepatic ldh-b is responsive to both aerobic and thermal stress when applied independently, and (b) southern Australian L. calcarifer populations may be locally adapted to cooler seasonal water temperatures.

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Thermal Tolerance and Temperature‐Dependent Feeding Behavior of F1 Gulf and Atlantic Coast Striped Bass Strains

Kenter

Berlinsky

2022

N American J Aquac

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To evaluate the pond culture potential of purebred Striped Bass Morone saxatilis, the thermal stress tolerance and associated feeding behavior of Atlantic coast (Delaware River; DE) and Gulf of Mexico (Florida; FL) strains (~1.0-1.6 kg) were evaluated. In the first experiment, critical thermal maxima (CTmax) temperatures were determined by gradually increasing the water temperature of individual fish that were housed in 311-L insulated containers (0.3°C/ min) and determining when the fish experienced loss of equilibrium (n = 6/strain). The results indicated that the fish from the FL strain had a higher CTmax value (36.7 ± 0.32°C) than did those from the DE strain (35.7 ± 0.57°C). In the second experiment, feeding behavior and feed consumption were evaluated during simulated summer temperature fluctuations by increasing the water temperature from 26°C to 34°C by 2°C every 2 d (n = 30 fish/strain). Feed consumption decreased inversely with temperature in both strains until a mortality event occurred at 34°C. The results suggest that there are physiological adaptations to elevated temperatures among Striped Bass strains and they may be suitable for pond culture if feeding is restricted at high temperatures (>30°C).

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Thermal tolerance varies in tropical and sub-tropical populations of barramundi (Lates calcarifer) consistent with local adaptation

Cited by 30 publications

References 12 publications

Aerobic scope does not predict the performance of a tropical eurythermal fish at elevated temperatures

Aerobic scope does not predict the performance of a tropical eurythermal fish at elevated temperatures

Exposing local adaptation: synergistic stressors elicit population-specific lactate dehydrogenase-B (ldh-b) expression profiles in Australian barramundi, Lates calcarifer

Thermal Tolerance and Temperature‐Dependent Feeding Behavior of F1 Gulf and Atlantic Coast Striped Bass Strains

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