Post-exercise metabolic rate in Atlantic cod and its dependence upon the method of exhaustion

Reidy, Shannon P.

doi:10.1006/jfbi.1995.0145

Cited by 54 publications

(83 citation statements)

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“…3A). It should be noted that a similar exhaustive exercise protocol as the one used in this study elicited a higher maximum in Atlantic cod ( Gadus morhua ) than did a Ucrit test [31]. Furthermore, the values for peak in this study are only slightly lower than the values of maximum reported for full-size coho salmon exercising in a swim tunnel at the same temperature [24], and this difference could quite easily be associated with methodological rather than biological differences.…”

Section: Discussionmentioning

confidence: 48%

Physiological Benefits of Being Small in a Changing World: Responses of Coho Salmon (Oncorhynchus kisutch) to an Acute Thermal Challenge and a Simulated Capture Event

et al. 2012

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Evidence is building to suggest that both chronic and acute warm temperature exposure, as well as other anthropogenic perturbations, may select for small adult fish within a species. To shed light on this phenomenon, we investigated physiological and anatomical attributes associated with size-specific responses to an acute thermal challenge and a fisheries capture simulation (exercise+air exposure) in maturing male coho salmon (Oncorhynchus kisutch). Full-size females were included for a sex-specific comparison. A size-specific response in haematology to an acute thermal challenge (from 7 to 20°C at 3°C h−1) was apparent only for plasma potassium, whereby full-size males exhibited a significant increase in comparison with smaller males (‘jacks’). Full-size females exhibited an elevated blood stress response in comparison with full-size males. Metabolic recovery following exhaustive exercise at 7°C was size-specific, with jacks regaining resting levels of metabolism at 9.3±0.5 h post-exercise in comparison with 12.3±0.4 h for full-size fish of both sexes. Excess post-exercise oxygen consumption scaled with body mass in male fish with an exponent of b = 1.20±0.08. Jacks appeared to regain osmoregulatory homeostasis faster than full-size males, and they had higher ventilation rates at 1 h post-exercise. Peak metabolic rate during post-exercise recovery scaled with body mass with an exponent of b∼1, suggesting that the slower metabolic recovery in large fish was not due to limitations in diffusive or convective oxygen transport, but that large fish simply accumulated a greater ‘oxygen debt’ that took longer to pay back at the size-independent peak metabolic rate of ∼6 mg min−1 kg−1. Post-exercise recovery of plasma testosterone was faster in jacks compared with full-size males, suggesting less impairment of the maturation trajectory of smaller fish. Supporting previous studies, these findings suggest that environmental change and non-lethal fisheries interactions have the potential to select for small individuals within fish populations over time.

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Section: Discussionmentioning

confidence: 48%

Physiological Benefits of Being Small in a Changing World: Responses of Coho Salmon (Oncorhynchus kisutch) to an Acute Thermal Challenge and a Simulated Capture Event

et al. 2012

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“…The time until the experiment began was approximately 60 s, and the first ṀO 2 measurement taken with wait period of 60 s and a measuring period of 150 s. The background ṀO 2 from before the trial was subtracted from this initial ṀO 2 value, which was then considered MMR [99, 100]. …”

Section: Methodsmentioning

confidence: 99%

Evaluating dispersal potential of an invasive fish by the use of aerobic scope and osmoregulation capacity

2017

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Non-indigenous species (NIS) can impact marine biodiversity and ecosystem structure and function. Once introduced into a new region, secondary dispersal is limited by the physiology of the organism in relation to the ambient environment and by complex interactions between a suite of ecological factors such as presence of predators, competitors, and parasites. Early prediction of dispersal potential and future ‘area of impact’ is challenging, but also a great asset in taking appropriate management actions. Aerobic scope (AS) in fish has been linked to various fitness-related parameters, and may be valuable in determining dispersal potential of aquatic invasive species in novel environments. Round goby, Neogobius melanostomus, one of the most wide-ranging invasive fish species in Europe and North America, currently thrives in brackish and fresh water, but its ability to survive in high salinity waters is unknown to date. We show that AS in round goby is reduced by 30% and blood plasma osmolality increased (indicating reduced capacity for osmoregulation) at salinities approaching oceanic conditions, following slow ramping (5 PSU per week) and subsequent long-term acclimation to salinities ranging between 0 and 30 PSU (8 days at final treatment salinities before blood plasma osmolality measurements, 12–20 additional days before respirometry). Survival was also reduced at the highest salinities yet a significant proportion (61%) of the fish survived at 30 PSU. Reduced physiological performance at the highest salinities may affect growth and competitive ability under oceanic conditions, but to what extent reduced AS and osmoregulatory capacity will slow the current 30 km year-1 rate of advance of the species through the steep salinity gradient from the brackish Baltic Sea and into the oceanic North Sea remains speculative. An unintended natural experiment is in progress to test whether the rate of advance slows down. At the current rate of advance the species will reach the oceanic North Sea by 2018/2019, therefore time for taking preventative action is short.

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“…Critical swimming velocity and burst swimming protocols (Reidy et al ., 1995; Killen et al ., 2007; Clark et al ., 2013; Norin and Clark, 2016) were used to determine MMR. They began between 08.00 and 09.00 h and lasted 2–6 h. For the critical swimming velocity test, water velocity was gradually increased until the fish continuously swam at 30 cm s −1 for 20 min.…”

Section: Methodsmentioning

confidence: 99%

High thermal tolerance of a rainbow trout population near its southern range limit suggests local thermal adjustment

Verhille

English²,

Cocherell

et al. 2016

Conserv Physiol

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California is the southern limit for indigenous rainbow trout. We studied wild-caught, Endangered Species Act (ESA)-listed fish beside their home stream and showed that the thermal aerobic performance capacity of these fish remains at 95% of peak aerobic scope across temperatures of 17.8–24.6°C. This range represents an unusually high temperature tolerance compared with conspecifics and congeneric species from northern latitudes.

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Post-exercise metabolic rate in Atlantic cod and its dependence upon the method of exhaustion

Cited by 54 publications

References 0 publications

Physiological Benefits of Being Small in a Changing World: Responses of Coho Salmon (Oncorhynchus kisutch) to an Acute Thermal Challenge and a Simulated Capture Event

Physiological Benefits of Being Small in a Changing World: Responses of Coho Salmon (Oncorhynchus kisutch) to an Acute Thermal Challenge and a Simulated Capture Event

Evaluating dispersal potential of an invasive fish by the use of aerobic scope and osmoregulation capacity

High thermal tolerance of a rainbow trout population near its southern range limit suggests local thermal adjustment

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