Thermal effects on red muscle contractile performance in deep-diving, large-bodied fishes

Stoehr, Ashley A.; Donley, Jeanine M.; Aalbers, Scott A.; Syme, Douglas A.; Sepúlveda, Chugey A.; Bernal, Diego

doi:10.1007/s10695-020-00831-7

Cited by 12 publications

(12 citation statements)

References 71 publications

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“…These findings are similar to those for a bigeye thresher tagged previously in the Gulf of Mexico and one tagged in Hawai'i [40], and to those tagged in the northeast Atlantic [37], where bigeye threshers exhibit clear diel diving patterns with deeper dives during the day. Bigeye threshers have a rete mirabile that allows them to conserve warmth around their brain and eye region, providing physiological benefits during time spent at deeper, colder depths likely for reasons due to feeding [36,37,41,51]. The bigeye thresher shark described here may have been exhibiting diel vertical migrations for feeding purposes, similar to previous studies; however, a larger sample size would be beneficial in describing GOM regionspecific behavioral and physiological strategies for this species.…”

Section: Bigeye Thresher Shark Discussionsupporting

confidence: 60%

Diel Vertical Habitat Use Observations of a Scalloped Hammerhead and a Bigeye Thresher in the Northern Gulf of Mexico

Anderson

Meese

Drymon

et al. 2022

Fishes

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Understanding habitat use of elasmobranchs in pelagic environments is complicated due to the mobility of these large animals and their ability to move great distances in a three-dimensional environment. The Gulf of Mexico is a region where many highly migratory pelagic shark species occur, while in close proximity to coastal, anthropogenic activity including recreational and commercial fisheries. This study provides summary information on the vertical habitat use for a single male scalloped hammerhead and a single male bigeye thresher that were each caught and tagged with an archiving satellite tag. The scalloped hammerhead occupied shallow depths (<100 m) over the continental shelf during the 90 d deployment. The bigeye thresher exhibited strong patterns of diel vertical migrations by occupying depths below the thermocline (>350 m) during the day, then occupying shallower depths (50–100 m) during the night. By providing summary information, this note urges future research to provide scientific information on pelagic, highly migratory species for management efforts in the Gulf of Mexico region.

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Section: Bigeye Thresher Shark Discussionsupporting

confidence: 60%

Diel Vertical Habitat Use Observations of a Scalloped Hammerhead and a Bigeye Thresher in the Northern Gulf of Mexico

Anderson

Meese

Drymon

et al. 2022

Fishes

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“…With this refinement in technique, power output of ventricular muscle at a given contraction frequency ( f H ) is not highly sensitive to temperature, and maximal power tends to increase with temperature. This limited temperature sensitivity of power output from the myocardium is likely associated with the relatively slow contraction rates of cardiac muscle in most fish, similar to the low thermal sensitivity of power in red muscle of very large fishes with relatively slow tail beat frequencies ( Stoehr et al, 2020 ). Likewise, the lengthening power of ventricular muscle was not very temperature dependent ( …”

Section: Discussionmentioning

confidence: 98%

Temperature effects on the contractile performance and efficiency of oxidative muscle from a eurythermal versus a stenothermal salmonid

Gamperl

Syme

2021

Journal of Experimental Biology

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We compared the thermal sensitivity of oxidative muscle function between the eurythermal Atlantic salmon (Salmo salar) and the more stenothermal Arctic char (Salvelinus alpinus; which prefers cooler waters). Power output was measured in red skeletal muscle strips and myocardial trabeculae, and efficiency (net work/energy consumed) was measured for trabeculae, from cold (6oC) and warm (15oC) acclimated fish at temperatures from 2-26oC. The mass-specific net power produced by char red muscle was greater than in salmon, by 2-5 fold depending on test temperature. Net power first increased, then decreased, when the red muscle of 6oC-acclimated char was exposed to increasing temperature. Acclimation to 15oC significantly impaired mass-specific power in char (by ∼40-50%) from 2 to 15oC, but lessened its relative decrease between 15 and 26oC. In contrast, maximal net power increased, and then plateaued, with increasing temperature in salmon from both acclimation groups. Increasing test temperature resulted in a ∼3-5 fold increase in maximal net power produced by ventricular trabeculae in all groups, and this effect was not influenced by acclimation temperature. Nonetheless, lengthening power was higher in trabeculae from warm acclimated char, and char trabeculae could not contract as fast as those from salmon. Finally, the efficiency of myocardial net work was approximately 2-fold greater in 15oC acclimated salmon than char (∼15 vs. 7%), and highest at 20oC in salmon. This study provides several mechanistic explanations as to their inter-specific difference in upper thermal tolerance, and potentially why southern char populations are being negatively impacted by climate change.

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“…Among these, one of the most effective is the rete mirabile , a circulatory apparatus that maintains higher temperatures for selected organs in the predator’s body. These include brain, eyes, muscles, kidneys, and stomachs, enhancing prey detection, swimming, and digestion respectively (Burne 1924; Block 1986; Brill 1994; Weng and Block 2004; Fritsches et al 2005; Stoehr et al 2020). We approximate the degree of thermoregulation by quantifying the number of physiological adaptations for each species (Supplementary Table S3).…”

Section: Methodsmentioning

confidence: 99%

Patterns and drivers of the diving behavior of large pelagic predators

Nuno

Guiet

Baranek

et al. 2022

Preprint

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Many large pelagic predators, including shark, tuna, and billfish, periodically dive to deep oceanic layers, connecting the surface and mesopelagic ecosystems. However, the patterns and drivers of deep dives across species remain poorly understood. To close this gap, we conduct a meta-analysis of the diving behavior of 24 pelagic predator species from the global ocean, resulting in 671 independent diving depth estimates from 87 tagging studies. Our analysis reveals consistent large-scale patterns in diving depths, with predators diving deeper offshore and during the day, and shallower closer to the coast and during the night. Deep diving species show similar diving depths during the night, with deeper dives for sharks, and shallower dives for tuna and swordfish. These patterns are reversed during the day, widening the gap between day and night vertical ranges for these groups. In contrast, shallow diving species show smaller variations between day and night dives, with sharks diving slightly deeper on average, followed by tuna and billfish. Correlations with co-located environmental variables suggest an important predictive role for proxies of prey abundance and light availability, as well as variables that influence physiology, such as oxygen and temperature. These relationships are more robust for deep divers during the day, and shallow divers at night. Our analysis highlights the value of tagging observations for the development of a mechanistic, quantitative characterization of vertical habitat use of large marine predators and its environmental constraints.

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Thermal effects on red muscle contractile performance in deep-diving, large-bodied fishes

Cited by 12 publications

References 71 publications

Diel Vertical Habitat Use Observations of a Scalloped Hammerhead and a Bigeye Thresher in the Northern Gulf of Mexico

Diel Vertical Habitat Use Observations of a Scalloped Hammerhead and a Bigeye Thresher in the Northern Gulf of Mexico

Temperature effects on the contractile performance and efficiency of oxidative muscle from a eurythermal versus a stenothermal salmonid

Patterns and drivers of the diving behavior of large pelagic predators

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