Intraspecific individual variation of temperature tolerance associated with oxygen demand in the European sea bass (<i>Dicentrarchus labrax</i>)

Ozolina, Karlina; Shiels, Holly A.; Ollivier, Hélène; Claireaux, Guy

doi:10.1093/conphys/cov060

Cited by 20 publications

(20 citation statements)

References 50 publications

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“…In the open ocean, fish often experience cold, hypoxic conditions during oscillatory dives which approach or extend beyond the depths at which the mixed layer ends and the oxygen minimum zone begins (Bernal et al., ). Segregation of vertical habitat use of open ocean fishes is driven by the physiological ability of species to maintain sufficient cardiorespiratory capacity for active behaviours under these challenging conditions (Bernal et al., , ), a trait governed by a suite of physiological factors which are known to show interindividual variation (Joyce et al., ; Ollivier, Marchant, Le Bayon, Servili, & Claireaux, ; Ozolina, Shiels, Ollivier, & Claireaux, ). This variation may ultimately manifest as differences in the maximum depth attainable by individual fish, or the amount of time fish spend at a given depth, and so give rise to intraspecific differences in vertical habitat use (Cosgrove, Arregui, Arrizabalaga, Goni, & Sheridan, ; Quayle, Righton, Hetherington, & Pickett, ; Vaudo et al., ), with implications for whether individuals are available to gears deployed at specific depths (Olsen, Heupel, Simpfendorfer, & Moland, ).…”

Section: The Capture Process and Selection On Physiological Traitsmentioning

confidence: 99%

A physiological perspective on fisheries‐induced evolution

Hollins

Thambithurai

Koeck

et al. 2018

Evolutionary Applications

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There is increasing evidence that intense fishing pressure is not only depleting fish stocks but also causing evolutionary changes to fish populations. In particular, body size and fecundity in wild fish populations may be altered in response to the high and often size‐selective mortality exerted by fisheries. While these effects can have serious consequences for the viability of fish populations, there are also a range of traits not directly related to body size which could also affect susceptibility to capture by fishing gears—and therefore fisheries‐induced evolution (FIE)—but which have to date been ignored. For example, overlooked within the context of FIE is the likelihood that variation in physiological traits could make some individuals within species more vulnerable to capture. Specifically, traits related to energy balance (e.g., metabolic rate), swimming performance (e.g., aerobic scope), neuroendocrinology (e.g., stress responsiveness) and sensory physiology (e.g., visual acuity) are especially likely to influence vulnerability to capture through a variety of mechanisms. Selection on these traits could produce major shifts in the physiological traits within populations in response to fishing pressure that are yet to be considered but which could influence population resource requirements, resilience, species’ distributions and responses to environmental change.

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Section: The Capture Process and Selection On Physiological Traitsmentioning

confidence: 99%

A physiological perspective on fisheries‐induced evolution

Hollins

Thambithurai

Koeck

et al. 2018

Evolutionary Applications

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show abstract

“…However, adjustments at any of these stages may result in physiological, functional and/or fitness-related trade-offs. For example, sea bass (Dicentrarchus labrax) that had higher temperature tolerance had better cardiac function and lower SMR, but also had reduced critical swimming speed compared with those with lower temperature tolerance (Ozolina et al, 2016).…”

Section: Metabolic Variables Are Affected By Exposure Timementioning

confidence: 99%

Elevated temperature and acclimation time affect metabolic performance in the heavily exploited Nile perch of Lake Victoria

Nyboer

Chapman

2017

Journal of Experimental Biology

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Increasing water temperatures owing to anthropogenic climate change are predicted to negatively impact the aerobic metabolic performance of aquatic ectotherms. Specifically, it has been hypothesized that thermal increases result in reductions in aerobic scope (AS), which lead to decreases in energy available for essential fitness and performance functions. Consequences of warming are anticipated to be especially severe for warm-adapted tropical species as they are thought to have narrow thermal windows and limited plasticity for coping with elevated temperatures. In this study we test how predicted warming may affect the aerobic performance of Nile perch (), a commercially harvested fish species in the Lake Victoria basin of East Africa. We measured critical thermal maxima (CT) and key metabolic variables such as AS and excess post-exercise oxygen consumption (EPOC) across a range of temperatures, and compared responses between acute (3-day) exposures and 3-week acclimations. CT increased with acclimation temperature; however, 3-week-acclimated fish had higher overall CT than acutely exposed individuals. Nile perch also showed the capacity to increase or maintain high AS even at temperatures well beyond their current range; however, acclimated Nile perch had lower AS compared with acutely exposed fish. These changes were accompanied by lower EPOC, suggesting that drops in AS may reflect improved energy utilization after acclimation, a finding that is supported by improvements in growth at high temperatures over the acclimation period. Overall, the results challenge predictions that tropical species have limited thermal plasticity, and that high temperatures will be detrimental because of limitations in AS.

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“…Atlantic salmon, [ 10 ]). We have shown separately [ 21 ] that robust performance under one environmental challenge test does not necessarily correlate with success in another (thermal tolerance and swimming capacity; and also see [ 9 ]). Moreover, there was no correlation between HCT performance and swimming performance in a preliminary study conducted on this cohort of sea bass (data not shown).…”

Section: Discussionmentioning

confidence: 99%

Individual variation in whole-animal hypoxia tolerance is associated with cardiac hypoxia tolerance in a marine teleost

et al. 2016

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Hypoxia is a pervasive problem in coastal environments and is predicted to have enduring impacts on aquatic ecosystems. Intraspecific variation in hypoxia tolerance is well documented in fish; however, the factors underlying this variation remain unknown. Here, we investigate the role of the heart in individual hypoxia tolerance of the European sea bass (Dicentrarchus labrax). We found individual whole-animal hypoxia tolerance is a stable trait in sea bass for more than 18 months (duration of study). We next examined in vitro cardiac performance and found myocardial muscle from hypoxia-tolerant individuals generated greater force, with higher rates of contraction and relaxation, than hypoxic-sensitive individuals during hypoxic exposure. Thus, whole-animal hypoxia tolerance is associated with cardiac hypoxia tolerance. As the occurrence of aquatic hypoxia is expected to increase in marine ecosystems, our experimental data suggest that cardiac performance may influence fish survival and distribution.

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Intraspecific individual variation of temperature tolerance associated with oxygen demand in the European sea bass (Dicentrarchus labrax)

Cited by 20 publications

References 50 publications

A physiological perspective on fisheries‐induced evolution

A physiological perspective on fisheries‐induced evolution

Elevated temperature and acclimation time affect metabolic performance in the heavily exploited Nile perch of Lake Victoria

Individual variation in whole-animal hypoxia tolerance is associated with cardiac hypoxia tolerance in a marine teleost

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