Metabolic Scope in Fishes

Priede, Imants George

doi:10.1007/978-94-011-7918-8_2

Cited by 251 publications

(286 citation statements)

References 51 publications

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“…In addition, the scaling of standard weight-specific metabolic rate with size (Brett and Groves 1979) should provide larger fishes with increased metabolic scope to avoid exceeding metabolic limits during periods of high stress (Priede 1985). Our findings indicate that older and slower-growing bluefish will experience lower probability of mortality during catchand-release angling.…”

Section: Discussionmentioning

confidence: 80%

Factors Affecting Catch‐and‐Release Mortality of Bluefish

Fabrizio¹,

Scharf

Shepherd

et al. 2008

N American J Fish Manag

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Abstract.-Recreational harvests of bluefish Pomatomus saltatrix along the U.S. coast from Maine to Florida exceed commercial harvests, and in recent years about 60-70% of angler-captured fish are released alive. The proportion of fish that survive hooking, handling, and release back to the ocean is unknown; however, if catch-and-release mortality is high, it may represent a significant component of the overall bluefish mortality rate. We estimated long-term (21-d) hooking mortality rates of field-captured bluefish and investigated the effects of various factors on postrelease mortality. Age, length, and the occurrence of bleeding were significant factors associated with catch-and-release mortality, which we estimated to be 38.8%. About 65% of the mortality was initial mortality, and the remainder was delayed mortality. We also performed a laboratory study to examine the physiological response of bluefish to two independent processes (hooking and release versus transfer in coolers to the laboratory) relevant to the field study. Laboratory-held fish that were hooked and released exhibited elevated concentrations of potassium in their blood, suggesting that they experienced either an osmotic imbalance or cellular damage. Laboratory-held fish exposed to the transfer treatment only exhibited osmotic imbalance (elevated plasma sodium concentration) and evidence of anaerobic metabolism (elevated plasma lactate concentration). Our findings indicate that bluefish age and size contribute to variable levels of metabolic stress and that delayed postrelease mortality is considerable.

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Section: Discussionmentioning

confidence: 80%

Factors Affecting Catch‐and‐Release Mortality of Bluefish

Fabrizio¹,

Scharf

Shepherd

et al. 2008

N American J Fish Manag

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“…In addition, the strategy most probably incurs other costs. For instance, a lowstandard metabolism is normally associated with a low maximum workload, both in terms of locomotion, digestion and food conversion (Priede 1985). Nevertheless, given the large number of trophic polymorphisms in ¢shes (Smith & Sku¨lason 1996;Schluter 1998), modi¢ca-tions of the SMR could be a commonly occurring strategy for reducing the impact of the hydrodynamical disadvantages caused by, for example, gape-limited predation (Pettersson & BrÎnmark 1997 or sexual selection (Quinn & Foote 1994).…”

Section: Discussionmentioning

confidence: 99%

Energetics, cost reduction and functional consequences of fish morphology

Pettersson¹,

Hedenström²

2000

Proc. R. Soc. Lond. B

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Cost reduction strategies are often invoked as explanations when studies of adaptation fail to ¢nd predicted costs. This might seem discouraging, o¡ering little opportunity for further investigation. In this paper, we demonstrate that cost reduction strategies can themselves be investigated by arguments from design. Recent work on inducible morphological defences has shown that hydrodynamical disadvantages (e.g. high drag) in ¢shes can be compensated for by standard metabolic rate (SMR) adjustments. Here, we theoretically investigate the possibilities and limitations for swimming cost compensation through SMR adjustment. We continue by modelling how intraspeci¢c power curve variation a¡ects the optimal swimming velocity between food patches. Our results show that, even though SMR modi¢cations may compensate for hydrodynamical disadvantages, low-drag ¢shes will nevertheless have a marked advantage under high food abundance. The relative advantage will decrease with decreasing food levels. We also show that hydrodynamical properties of ¢shes can be used to predict their propensity to become foraging (or swimming) specialists. Low-drag ¢shes can use a broad range of swimming velocities without substantial increases in swimming cost, whereas the cost of deviating from the optimal swimming velocity increases markedly in high-drag ¢shes. The results have important implications for the evolution of morphological diversity in ¢shes.

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“…Chinese bream is thus a typical model of the so-called locomotion−metabolic type of fish (i.e. fish species with a high locomotive but low digestive metabolism; Priede 1985). Chinese bream frequently forage on grass of low nutritive value in either open water bodies with a high risk of predation or in rivers with rapid currents.…”

Section: Swimming Performancementioning

confidence: 99%

Effects of temperature and digestion on the swimming performance of juvenile Chinese bream

Peng¹,

Cao²,

Fu³

2014

Aquat. Biol.

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Fish that are active foragers usually perform routine activities while digesting their food; thus, postprandial swimming capacity might be ecologically important. To test whether digestion affected swimming performance in an active forager and whether the possible effects varied with temperature, we investigated the critical swimming speed (U crit ) and the resting and active metabolic rate (MO 2 ) of fasted and fed juvenile Chinese bream Parabramis pekinensis after 30 d exposure to 3 temperatures (15, 20, and 25°C). In fasted fish, U crit , resting and active MO 2 all increased with temperature. Digestion elicited a significant increase in MO 2 , which was enhanced at higher temperatures. Compared to fasted fish, fed fish exhibited significantly lower U crit in both the 25 and 20°C groups, whereas no significant difference in U crit was observed between fasted and fed fish in the 15°C group. Furthermore, digestion resulted in a significantly higher active MO 2 in the 15°C group, whereas no significant difference in active MO 2 was observed between fasted and fed fish in the 20 and 25°C groups. This suggests that the bream adopted an additive metabolic mode, i.e. digestion and swimming were performed independently at low temperatures, but shifted to a digestion-priority mode at higher temperatures due to a shortage of oxygen resulting from an increased digestive and locomotive oxygen demand. The present study contradicted our hypothesis that an active cyprinid with high swimming per formance would give priority to locomotion when the oxygen supply was insufficient to meet the metabolic demands of both digestion and swimming.

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Metabolic Scope in Fishes

Cited by 251 publications

References 51 publications

Factors Affecting Catch‐and‐Release Mortality of Bluefish

Factors Affecting Catch‐and‐Release Mortality of Bluefish

Energetics, cost reduction and functional consequences of fish morphology

Effects of temperature and digestion on the swimming performance of juvenile Chinese bream

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