Exercise training does not affect heat tolerance in Chinook salmon (Oncorhynchus tshawytscha)

Isaza, Daniel F. Gomez; Rodgers, Essie M.

doi:10.1016/j.cbpa.2022.111229

Cited by 5 publications

(3 citation statements)

References 78 publications

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“…Observations of cross-protection have recently led researchers to explore the possibility of engineering cultured agricultural/ aquaculture species that are resistant to warmer environments (Foyer et al, 2016;Gomez Isaza and Rodgers, 2022;Pettinau et al, 2022;Rodgers and Gomez Isaza, 2022). Cross-protection studies suggest that economically valuable species could potentially be primed with a mild stressor, so they are better prepared for future heat stress.…”

Section: Adaptive Significance Of Cross-protectionmentioning

confidence: 99%

The mechanistic basis and adaptive significance of cross-tolerance: a ‘pre-adaptation’ to a changing world?

Rodgers

Isaza

2023

Journal of Experimental Biology

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Protective responses are pivotal in aiding organismal persistence in complex, multi-stressor environments. Multiple-stressor research has traditionally focused on the deleterious effects of exposure to concurrent stressors. However, encountering one stressor can sometimes confer heightened tolerance to a second stressor, a phenomenon termed ‘cross-protection’. Cross-protection has been documented in a wide diversity of taxa (spanning the bacteria, fungi, plant and animal kingdoms) and habitats (intertidal, freshwater, rainforests and polar zones) in response to many stressors (e.g. hypoxia, predation, desiccation, pathogens, crowding, salinity, food limitation). Remarkably, cross-protection benefits have also been shown among emerging, anthropogenic stressors, such as heatwaves and microplastics. In this Commentary, we discuss the mechanistic basis and adaptive significance of cross-protection, and put forth the idea that cross-protection will act as a ‘pre-adaptation’ to a changing world. We highlight the critical role that experimental biology has played in disentangling stressor interactions and provide advice for enhancing the ecological realism of laboratory studies. Moving forward, research will benefit from a greater focus on quantifying the longevity of cross-protection responses and the costs associated with this protective response. This approach will enable us to make robust predictions of species' responses to complex environments, without making the erroneous assumption that all stress is deleterious.

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Section: Adaptive Significance Of Cross-protectionmentioning

confidence: 99%

The mechanistic basis and adaptive significance of cross-tolerance: a ‘pre-adaptation’ to a changing world?

Rodgers

Isaza

2023

Journal of Experimental Biology

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“…Intermittent training, where fish are exercised for short periods each day (e.g., 6 h d −1 ) appear to be insufficient in stimulating higher growth rates. For example, growth remained unchanged in Chinook salmon ( Oncorhynchus tshawytscha ) exercised at 4.1 BL s −1 for 60 min day −1 for 3 weeks 66 . Potentially, the workload of intermittent exercise is too low to stimulate significant gains in muscle mass, or detraining effects may occur during rest periods 67 .…”

Section: Discussionmentioning

confidence: 99%

“…For example, growth remained unchanged in Chinook salmon (Oncorhynchus tshawytscha) exercised at 4.1 BL s À1 for 60 min day À1 for 3 weeks. 66 Potentially, the workload of intermittent exercise is too low to stimulate significant gains in muscle mass, or detraining effects may occur during rest periods. 67 Intermittent training regimes may also preclude beneficial behavioural changes that occur in fish exposed to continuous exercise, like fewer agnostic interactions and a more even distribution of food.…”

Section: Identifying Optimal Exercise Regimesmentioning

confidence: 99%

The growth‐promoting effects of exercise in finfish: A systematic review and meta‐analysis

Rodgers,

Gomez Isaza

2023

Reviews in Aquaculture

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Exercise training may be an effective tool for promoting growth and production efficiency in finfish aquaculture. Yet, changes in growth and feed conversion ratios (FCR) following periods of exercise can be varied and context dependent. Variation in species and training protocols (duration, intensity and regime) can misalign interpretations, and individual studies hold limited statistical power. To remedy this, we compiled data from 69 studies spanning 31 species to quantify the effects of exercise training on growth rates and FCRs. Using meta‐analytic tools, we show that exercise training significantly increases growth rates across a range of taxonomically diverse finfish. Optimal training regimes were identified; effects were strongest when fish were exercised continuously rather than intermittently, at target swimming speeds ≤ 2 body lengths s−1, for longer durations of time. These results are most applicable to juvenile fish (mean length of fish in the analyses = 16 cm). Exercise training was also shown to decrease variability in growth rates, leading to fish that are more uniform in size. FCRs were unaffected by exercise, showing that exercised‐ and control‐fish were equally efficient at converting food into body mass. Overall, our analyses show that exercise is a powerful management tool in promoting rapid growth, where fish can reach marketable sizes faster.

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Resetting thermal limits: 10-year-old white sturgeon display pronounced but reversible thermal plasticity

Weber,

Dichiera,

Brauner

2024

Journal of Thermal Biology

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Exercise training does not affect heat tolerance in Chinook salmon (Oncorhynchus tshawytscha)

Cited by 5 publications

References 78 publications

The mechanistic basis and adaptive significance of cross-tolerance: a ‘pre-adaptation’ to a changing world?

The mechanistic basis and adaptive significance of cross-tolerance: a ‘pre-adaptation’ to a changing world?

The growth‐promoting effects of exercise in finfish: A systematic review and meta‐analysis

Resetting thermal limits: 10-year-old white sturgeon display pronounced but reversible thermal plasticity

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