Muscle Remodeling and the Exercise Physiology of Fish

McClelland, Grant B.

doi:10.1097/jes.0b013e3182571e2c

Cited by 24 publications

(18 citation statements)

References 41 publications

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“…Does terrestrial exercise in fishes (e.g. mudskippers on a treadmill; Jew et al, 2013) lead to the same training effect as observed with swimming (McClelland, 2012)? Do fishes need to balance trade-offs when adjusting locomotor performance for aquatic versus terrestrial locomotion and, if so, how do lag times in the induction and reversal of these responses influence the scope of plasticity in fishes with different amphibious habits ( Fig.…”

Section: Buoyancy Gravity and Movement On Landmentioning

confidence: 96%

Amphibious fishes: evolution and phenotypic plasticity

Wright

Turko

2016

Journal of Experimental Biology

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Amphibious fishes spend part of their life in terrestrial habitats. The ability to tolerate life on land has evolved independently many times, with more than 200 extant species of amphibious fishes spanning 17 orders now reported. Many adaptations for life out of water have been described in the literature, and adaptive phenotypic plasticity may play an equally important role in promoting favourable matches between the terrestrial habitat and behavioural, physiological, biochemical and morphological characteristics. Amphibious fishes living at the interface of two very different environments must respond to issues relating to buoyancy/gravity, hydration/ desiccation, low/high O 2 availability, low/high CO 2 accumulation and high/low NH 3 solubility each time they traverse the air-water interface. Here, we review the literature for examples of plastic traits associated with the response to each of these challenges. Because there is evidence that phenotypic plasticity can facilitate the evolution of fixed traits in general, we summarize the types of investigations needed to more fully determine whether plasticity in extant amphibious fishes can provide indications of the strategies used during the evolution of terrestriality in tetrapods.

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Section: Buoyancy Gravity and Movement On Landmentioning

confidence: 96%

Amphibious fishes: evolution and phenotypic plasticity

Wright

Turko

2016

Journal of Experimental Biology

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“…Data: Swim training generally increases (Davison 1997;Anttila et al 2006), but may have no effect (e.g., Lemoine et al 2010;Martin-Perez et al 2012;McClelland 2012;He et al 2013;Magnoni et al 2013). Dependent on muscle fiber-type (reviewed by Davison 1997).…”

Section: Datamentioning

confidence: 99%

Adaptation and acclimation of aerobic exercise physiology in Lake Whitefish ecotypes (Coregonus clupeaformis)

et al. 2015

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The physiological mechanisms underlying local adaptation in natural populations of animals, and whether the same mechanisms contribute to adaptation and acclimation, are largely unknown. Therefore, we tested for evolutionary divergence in aerobic exercise physiology in laboratory bred, size-matched crosses of ancestral, benthic, normal Lake Whitefish (Coregonus clupeaformis) and derived, limnetic, more actively swimming "dwarf" ecotypes. We acclimated fish to constant swimming (emulating limnetic foraging) and control conditions (emulating normal activity levels) to simultaneously study phenotypic plasticity. We found extensive divergence between ecotypes: dwarf fish generally had constitutively higher values of traits related to oxygen transport (ventricle size) and use by skeletal muscle (percent oxidative muscle, mitochondrial content), and also evolved differential plasticity of mitochondrial function (Complex I activity and flux through Complexes I-IV and IV). The effects of swim training were less pronounced than differences among ecotypes and the traits which had a significant training effect (ventricle protein content, ventricle malate dehydrogenase activity, and muscle Complex V activity) did not differ among ecotypes. Only one trait, ventricle mass, varied in a similar manner with acclimation and adaptation and followed a pattern consistent with genetic accommodation. Overall, the physiological and biochemical mechanisms underlying acclimation and adaptation to swimming activity in Lake Whitefish differ.

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“…Many researchers have hypothesized that exercise could potentially represent a natural, noninvasive, and economical approach to improve fish growth (Schwebel, 2017). With extensive research and experimentation, fish have become a powerful model for exercise training and muscle development (McClelland, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…However, white fibers may also be recruited to a lesser extent (Palstra & Planas, 2011). Since there is such a clear anatomical separation between the muscle masses, fiber type-specific responses to exercise can be determined more easily (McClelland, 2012).…”

Section: Introductionmentioning

confidence: 99%

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The Physiological Effects of Exercise on California Yellowtail (Seriola dorsalis) White Muscle

Giannini¹

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California yellowtail (Seriola dorsalis) is a species of ray-finned fish that demonstrates a significant increase in muscle mass in response to sustained exercise at optimal swimming speed. In this study, three groups of yellowtail have been analyzed for a 6-month period to determine if the length of exercise affects white muscle fiber development and if these changes persist when the exercised fish have been returned to a normal "resting" condition. Gene analysis was performed to test if MyoD, a myogenic regulatory factor, was upregulated in response to exercise. To test these questions, the groups compared included a control group (not exercised), a 3-week exercise group, and a 4-week exercise group. Samples of the yellowtail white muscle were taken monthly and analyzed microscopically to measure fiber areas and to determine if any of the groups were undergoing hypertrophy or hyperplasia. Hypertrophy is arbitrarily classified as fibers 7000+ μm 2 and hyperplasia is marked by presence of newly recruited fibers (0-1000 μm 2). The results show that immediately following the exercise period, the 4-week exercise group had the highest average fiber area (3365.5 ± 113.5 μm 2) and the control group had the smallest (3034.8 ± 103 μm 2). However, at the end of the 6-months, the average fiber area of the 4-week exercise, 3-week exercise, and control were more similar in size (4249.4 ± 149.2 μm 2 , 4046.1 ± 134.6 μm 2 , 4121.4 ±161.7 μm 2) with no significant difference. When comparing the patterning of the fibers, all three groups demonstrated a general trend of hypertrophy over the 6month period. In contrast, the control group had the greatest amount of hyperplasia, but there was not a noticeable trend in the amount of fibers that were recruited over the 6-month period. MyoD was upregulated at the start of the racing procedure compared to samples that were collected one month post-exercise.

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Muscle Remodeling and the Exercise Physiology of Fish

Cited by 24 publications

References 41 publications

Amphibious fishes: evolution and phenotypic plasticity

Amphibious fishes: evolution and phenotypic plasticity

Adaptation and acclimation of aerobic exercise physiology in Lake Whitefish ecotypes (Coregonus clupeaformis)

The Physiological Effects of Exercise on California Yellowtail (Seriola dorsalis) White Muscle

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