Thermal acclimation to cold alters myosin content and contractile properties of rainbow smelt, Osmerus mordax, red muscle

Coughlin, David J.; Shiels, Lisa P.; Nuthakki, Seshuvardhan; Shuman, Jacie L.

doi:10.1016/j.cbpa.2016.02.021

Cited by 18 publications

(16 citation statements)

References 36 publications

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“…For both experimental temperatures, red muscle bundles from CA fish had an increase in the oscillation frequency at which power output was maximized, although the effect size was relatively modest. This higher F opt correlates to a higher tailbeat frequency at maximum steady swimming speed, previously reported in CA smelt (Coughlin, Shiels et al, ). Trout showed no significant variation in F opt with thermal acclimation in the factorial analysis.…”

Section: Discussionsupporting

confidence: 78%

“…Sample sizes were n = 15 WA trout, n = 10 CA trout, n = 5 WA smelt, and n = 6 CA smelt. Smelt data are from Coughlin, Shiels et al (). CA: cold acclimated; U crit : swimming speed; WA: warm acclimation [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Resultsmentioning

confidence: 99%

“…A significant difference in maximum shortening velocity between acclimation groups correlates with a change in the myosin expression due to thermal acclimation. Previous studies have reported variations in smelt myosin due to thermal acclimation (Coughlin, Shiels et al, ; Woytanowski & Coughlin, ). The significantly faster maximum shortening velocity seen in CA smelt red muscle bundles leads to a prediction of a shift in myosin heavy chain composition of the red muscle—that red muscle of CA smelt will contain a greater proportion of fast MyHC isoform(s).…”

Section: Discussionmentioning

confidence: 97%

“…Analysis of these contractions determined whether to keep or discard the muscle bundle. Bundles were kept if the maximum muscle tension produced was greater than 20 N/m 2 ; prior research has demonstrated that muscle with at least this level of tension will maintain function over the approximately 3 hr period of muscle mechanics measurements (Coughlin, Shiels, Nuthakki, & Shuman, ). From the isometric contraction experiments, twitch time (TW90 in ms) was defined as the time from stimulation to 90% relaxation (10% of peak force left).…”

Section: Methodsmentioning

confidence: 99%

“…Because of the freeze resistance measures used by smelt, they are able to take advantage of a nutrient‐rich location that many other fish are unable to use (Driedzic & Ewart, ). A thermal acclimation response of the muscle to cold water permits an active feeding even in the coldest of winter months (Coughlin, Long, Gezzi, Modi, & Woluko, ; Woytanowski & Coughlin, ). Trout are relatively stenothermal in comparison with smelt—trout prefer temperatures ranging from 12 to 16°C but are known to survive in water temperature ranging from 5 to 24°C (Candiotto, Bo, & Fenoglio, ).…”

Section: Introductionmentioning

confidence: 99%

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Red muscle function and thermal acclimation to cold in rainbow smelt, Osmerus mordax, and rainbow trout, Oncorhynchus mykiss

Shuman

Coughlin

2018

J Exp Zool Pt A

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Climate change affects the thermal environment of aquatic organisms. Changes in the thermal environment may affect muscle function in the eurythermal rainbow smelt, Osmerus mordax, and relatively more stenothermal rainbow trout, Oncorhynchus mykiss. Literature suggests that the trout will be more sensitive to changes in environmental temperature, as they experience a more limited range of environmental temperatures. To examine the effects of thermal environment on red muscle function, both the smelt and trout were thermally acclimated to either a warm (12-15°C) or cold (4-5°C) temperature, after which studies of swimming performance and muscle mechanics were performed. The data on swimming performance and maximum muscle shortening velocity in rainbow smelt were previously published. In both species, cold-acclimated (CA) fish swam with a significantly faster maximum aerobic swimming speed than warm-acclimated fish, when tested at a common temperature of 10°C. Similarly, CA smelt and trout had faster red muscle contraction kinetics. However, smelt displayed a greater shift in contractile properties, such as having a significant shift in maximum muscle shortening velocity that was not observed in trout. The smelt red muscle outperformed trout, with twitch and tetanic times of relaxation being significantly faster for CA smelt compared with CA trout, especially when contraction kinetics were tested at 2°C. The smelt shows a greater thermal acclimation response compared with trout, with more robust increases in maximum swimming speed and faster muscle contractile properties. These differences in acclimation response may contribute to understanding how smelt and trout cope with climate change.

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Section: Discussionsupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Red muscle function and thermal acclimation to cold in rainbow smelt, Osmerus mordax, and rainbow trout, Oncorhynchus mykiss

Shuman

Coughlin

2018

J Exp Zool Pt A

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Climate change and anadromous fish: How does thermal acclimation affect the mechanics of the myotomal muscle of the Atlantic salmon, Salmo salar?

2021

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In response to accelerated temperature shifts due to climate change, the survival of many species will require forms of thermal acclimation to their changing environment. We were interested in how climate change will impact a commercially and recreationally important species of fish, Atlantic salmon (Salmo salar). As climate change alters the thermal environment of their natal streams, we asked how their muscle function will be altered by extended exposure to both warm and cold temperatures. We performed a thermal acclimation study of S. salar muscle mechanics of both fast‐twitch, or white, and slow‐twitch, or red, myotomal muscle bundles to investigate how temperature acclimated Atlantic salmon would respond across a range of different temperatures. Isometric contraction properties, maximum shortening velocity, and oscillatory power output were measured and compared amongst three groups of salmon—warm acclimated (20°C), cold‐acclimated (2°C), and those at their rearing temperature (12°C). The Atlantic salmon showed limited thermal acclimation in their contraction kinetics, and some of the shifts in contractile properties that were observed would not be predicted to mitigate the impact of a warming environment. For instance, the maximum shortening velocity at a common test temperature was higher in the warm acclimated group and lower in the cold‐acclimated group. In addition, critical swimming speed did not vary with temperature of acclimation when tested at a common temperature (12°C). Our results suggest that Atlantic salmon populations will continue to struggle in response to a warming environment.

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Identification of wild and farmed broadhead catfish ( Clarias macrocephalus Günther, 1864) based on morphometry, digestive indexes and flesh quality

et al. 2018

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Thermal acclimation to cold alters myosin content and contractile properties of rainbow smelt, Osmerus mordax, red muscle

Cited by 18 publications

References 36 publications

Red muscle function and thermal acclimation to cold in rainbow smelt, Osmerus mordax, and rainbow trout, Oncorhynchus mykiss

Red muscle function and thermal acclimation to cold in rainbow smelt, Osmerus mordax, and rainbow trout, Oncorhynchus mykiss

Climate change and anadromous fish: How does thermal acclimation affect the mechanics of the myotomal muscle of the Atlantic salmon, Salmo salar?

Identification of wild and farmed broadhead catfish ( Clarias macrocephalus Günther, 1864) based on morphometry, digestive indexes and flesh quality

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