The effect of temperature and body size on metabolic scope of activity in juvenile Atlantic cod Gadus morhua L.

Tirsgaard, Bjørn; Behrens, Jane; Steffensen, John F.

doi:10.1016/j.cbpa.2014.09.033

Cited by 52 publications

(65 citation statements)

References 64 publications

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“…At 30°C, there was an observed increase in haemoglobin levels, probably due to the higher metabolic demand at higher temperatures (Souza & Bonilla‐Rodriguez, ; Tirsgaard, Behrens, & Steffensen, ; Xie et al, ). This was observed in the goldfish Carassius aurata (Chudzik & Houston, ) and in Oreochromis niloticus juveniles when exposed to different temperatures, but it was concluded that water temperature directly influences the concentration of haemoglobin (Qiang, Yang, Wang, Kpundeh, & Xu, ).…”

Section: Discussionmentioning

confidence: 99%

Haematological and oxidative stress responses inPiaractus mesopotamicusunder temperature variations in water

et al. 2019

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In this study, the influence of temperature variation on the blood and oxidative stress parameters of pacu Piaractus mesopotamicus juveniles was evaluated. Fish were subjected to gradual changes of temperature, over 5 days, by 24°C until reaching to experimental temperatures 18, 21, 24 (control), 27 and 30°C. There were significant differences (p < .05) in glucose and lactate of blood in both the haematological relationships and oxidative stress parameters. Glucose levels increased at 30°C and decreased at 21°C. Lactate levels were highest at 18°C. While the haematocrit was higher at all altered temperatures, haemoglobin levels decreased at 21°C and increased at 30°C, causing alterations in haematimetric indices. In the liver, glutathione‐S‐transferase (GST) activity was reduced at 18°C while antioxidant capacity against peroxyl radicals (ACAP) was highest at 30°C. Thiobarbituric acid reactive substances (TBARS) increased at 18, 21 and 27°C. In the muscle, ACAP decreased at 27 and 30°C and TBARS increased at 30°C. The results indicate that the species shows sensitivity to temperature variations. Accordingly, we conclude that with short‐term temperature variations >3°C, it is possible to induce higher alterations in the observed parameters in pacu juveniles.

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Section: Discussionmentioning

confidence: 99%

Haematological and oxidative stress responses inPiaractus mesopotamicusunder temperature variations in water

et al. 2019

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“…A study on tropical bridled monocle bream Scolopsis bilineata (Bloch 1793) reported that the maximum

\overset{M}{true}

O 2 at 28° C obtained during a U crit protocol (239 µmol O 2 min −1 kg −1 ) was 57% higher than the

\overset{M}{true}

O 2 obtained immediately after a 15 min exhaustive chase (152 µmol O 2 min −1 kg −1 ) and 30% higher than the

\overset{M}{true}

O 2 obtained after a combined 3 min exhaustive chase and 1 min air exposure test (184 µmol O 2 min −1 kg −1 ) (Roche et al ., ). Scolopsis bilineata is described as a strong endurance swimmer (Roche et al ., ), willing to swim steadily in the swim‐flume respirometer, whereas G. morhua can be reluctant to swim inside a flume (Soofiani & Priede, ; Tirsgaard et al ., ) and rarely reach high speeds. Reluctance to swim inside a flume was also reported by Killen et al .…”

Section: Which Methods Work Best?mentioning

confidence: 99%

Measurement and relevance of maximum metabolic rate in fishes

Norin

Clark

2015

Journal of Fish Biology

331

353

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Maximum (aerobic) metabolic rate (MMR) is defined here as the maximum rate of oxygen consumption (ṀO 2max ) that a fish can achieve at a given temperature under any ecologically relevant circumstance. Different techniques exist for eliciting MMR of fishes, of which swim-flume respirometry (critical swimming speed tests and burst-swimming protocols) and exhaustive chases are the most common. Available data suggest that the most suitable method for eliciting MMR varies with species and ecotype, and depends on the propensity of the fish to sustain swimming for extended durations as well as its capacity to simultaneously exercise and digest food. MMR varies substantially (>10 fold) between species with different lifestyles (i.e. interspecific variation), and to a lesser extent (

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“…If there were insurmountable geometric constraints on the size of the gills that limited oxygen uptake in larger fishes, this would by necessity show up as a drop in FAS with increasing body mass. While the present analysis includes different species, a similar pattern has also been observed within species (Killen et al ., ; Norin & Malte, , ; Clark et al ., ; Huang et al ., ; Mager et al ., ; Zhang et al ., ; Luo et al ., ; Tirsgaard et al ., ; Messmer et al ., ).…”

Section: Oxygen Demand Vs Oxygen Supply and How They Scale With Bodymentioning

confidence: 99%

Models projecting the fate of fish populations under climate change need to be based on valid physiological mechanisms

Lefevre

McKenzie

Nilsson

2017

Global Change Biology

131

155

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Some recent modelling papers projecting smaller fish sizes and catches in a warmer future are based on erroneous assumptions regarding (i) the scaling of gills with body mass and (ii) the energetic cost of 'maintenance'. Assumption (i) posits that insurmountable geometric constraints prevent respiratory surface areas from growing as fast as body volume. It is argued that these constraints explain allometric scaling of energy metabolism, whereby larger fishes have relatively lower mass-specific metabolic rates. Assumption (ii) concludes that when fishes reach a certain size, basal oxygen demands will not be met, because of assumption (i). We here demonstrate unequivocally, by applying accepted physiological principles with reference to the existing literature, that these assumptions are not valid. Gills are folded surfaces, where the scaling of surface area to volume is not constrained by spherical geometry. The gill surface area can, in fact, increase linearly in proportion to gill volume and body mass. We cite the large body of evidence demonstrating that respiratory surface areas in fishes reflect metabolic needs, not vice versa, which explains the large interspecific variation in scaling of gill surface areas. Finally, we point out that future studies basing their predictions on models should incorporate factors for scaling of metabolic rate and for temperature effects on metabolism, which agree with measured values, and should account for interspecific variation in scaling and temperature effects. It is possible that some fishes will become smaller in the future, but to make reliable predictions the underlying mechanisms need to be identified and sought elsewhere than in geometric constraints on gill surface area. Furthermore, to ensure that useful information is conveyed to the public and policymakers about the possible effects of climate change, it is necessary to improve communication and congruity between fish physiologists and fisheries scientists.

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The effect of temperature and body size on metabolic scope of activity in juvenile Atlantic cod Gadus morhua L.

Cited by 52 publications

References 64 publications

Haematological and oxidative stress responses inPiaractus mesopotamicusunder temperature variations in water

Haematological and oxidative stress responses inPiaractus mesopotamicusunder temperature variations in water

Measurement and relevance of maximum metabolic rate in fishes

Models projecting the fate of fish populations under climate change need to be based on valid physiological mechanisms

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