Impact of a simulated marine heatwave in the hematological profile of a temperate shark (Scyliorhinus canicula)

Pegado, Maria Rita; Santos, Catarina; Raffoul, Dayanne; Konieczna, Marta; Sampaio, Eduardo; Maulvault, Ana Luísa; Diniz, Mário; Rosa, Rui

doi:10.1016/j.ecolind.2020.106327

Cited by 14 publications

(11 citation statements)

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“…In addition to increasing oxygen demands, oxygen affinity typically decreases with temperature (Nikinmaa et al, 2019), and several elasmobranch species have been shown to adjust their hematological profile in response to environmental challenges, namely temperature (Butler and Taylor, 1975;Neale et al, 1977;Bouyoucos et al, 2020a;Pegado et al, 2020b). However, no significant overall effect was detected for EW or EA for the endpoints analyzed here, with insufficient data to conduct the analysis for EWA (Figure 5E; Supplementary Table 3).…”

Section: Oxygen Transportmentioning

confidence: 86%

“…Excluded were studies (or individual responses) that (i) lacked a suitable control treatment, TABLE 1 | Summary of the references including in the analysis across the different treatments, namely experimental warming (EW), acidification (EA), deoxygenation (ED), and their combination (EWA and EWD). Neale et al, 1977;Du Preez et al, 1988;Fangue and Bennett, 2003;Tullis and Baillie, 2005;Mull et al, 2008;Rodda and Seymour, 2008;Dabruzzi et al, 2013;Rosa et al, 2014Rosa et al, , 2016aDi Santo, 2015, 2016Pistevos et al, 2015;Johnson et al, 2016;Whitney et al, 2016;Lear et al, 2017;Pistevos et al, 2017Pistevos et al, , 2019Luongo and Lowe, 2018;Pouca et al, 2018Pouca et al, , 2019Di Santo, 2019;Hume, 2019;Schwieterman et al, 2019;Bouyoucos et al, 2020a,c;Crear et al, 2020;Musa et al, 2020;Pegado et al, 2020b;Gervais et al, 2021;Wheeler et al, 2021 EA Green andJutfelt, 2014;Heinrich et al, 2014Heinrich et al, , 2016Rosa et al, 2014Rosa et al, , 2016aDi Santo, 2015, 2016Dixson et al, 2015;Pistevos et al, 2015Pistevos et al, , 2017…”

Section: Literature Searchmentioning

confidence: 99%

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Elasmobranch Responses to Experimental Warming, Acidification, and Oxygen Loss—A Meta-Analysis

et al. 2021

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Despite the long evolutionary history of this group, the challenges brought by the Anthropocene have been inflicting an extensive pressure over sharks and their relatives. Overexploitation has been driving a worldwide decline in elasmobranch populations, and rapid environmental change, triggered by anthropogenic activities, may further test this group's resilience. In this context, we searched the literature for peer-reviewed studies featuring a sustained (>24 h) and controlled exposure of elasmobranch species to warming, acidification, and/or deoxygenation: three of the most pressing symptoms of change in the ocean. In a standardized comparative framework, we conducted an array of mixed-model meta-analyses (based on 368 control-treatment contrasts from 53 studies) to evaluate the effects of these factors and their combination as experimental treatments. We further compared these effects across different attributes (lineages, climates, lifestyles, reproductive modes, and life stages) and assessed the direction of impact over a comprehensive set of biological responses (survival, development, growth, aerobic metabolism, anaerobic metabolism, oxygen transport, feeding, behavior, acid-base status, thermal tolerance, hypoxia tolerance, and cell stress). Based on the present findings, warming appears as the most influential factor, with clear directional effects, namely decreasing development time and increasing aerobic metabolism, feeding, and thermal tolerance. While warming influence was pervasive across attributes, acidification effects appear to be more context-specific, with no perceivable directional trends across biological responses apart from the necessary to achieve acid-base balance. Meanwhile, despite its potential for steep impacts, deoxygenation has been the most neglected factor, with data paucity ultimately precluding sound conclusions. Likewise, the implementation of multi-factor treatments has been mostly restricted to the combination of warming and acidification, with effects approximately matching those of warming. Despite considerable progress over recent years, research regarding the impact of these drivers on elasmobranchs lags behind other taxa, with more research required to disentangle many of the observed effects. Given the current levels of extinction risk and the quick pace of global change, it is further crucial that we integrate the knowledge accumulated through different scientific approaches into a holistic perspective to better understand how this group may fare in a changing ocean.

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Section: Oxygen Transportmentioning

confidence: 86%

Section: Literature Searchmentioning

confidence: 99%

Elasmobranch Responses to Experimental Warming, Acidification, and Oxygen Loss—A Meta-Analysis

et al. 2021

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“…For instance, both subcontinental and marine heat waves have been shown to markedly alter the ecosystem structure, composition, and function ( Ruthrof et al 2018 ; Sanford et al 2019 ). On an organismal level, heat waves were demonstrated to induce the production of heat shock proteins ( Olabarria et al 2016 ) and change hematological parameters ( Pegado et al 2020 ), as well as negatively impact fitness-relevant traits, such as body condition and mortality ( Leung et al 2017 ; Abarca et al 2019 ) or sperm quality and function ( Hurley et al 2018 ; Sales et al 2018 ). However, the susceptibility of animals to all these effects largely depends on their immediate behavioral responses to heat waves, which ultimately dictate the extent to which essential traits, such as longevity or fertility are affected ( Huey et al 2012 ; Beever et al 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Heat wave effects on the behavior and life-history traits of sedentary antlions

2020

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Research on the behavioral responses of animals to extreme weather events, such as heat wave, is lacking even though their frequency and intensity in nature are increasing. Here, we investigated the behavioral response to a simulated heat wave in two species of antlions (Neuroptera: Myrmeleontidae). These insects spend the majority of their lives as larvae and live in sandy areas suitable for a trap-building hunting strategy. We used larvae of Myrmeleon bore and Euroleon nostras, which are characterized by different microhabitat preferences—sunlit in the case of M. bore and shaded in the case of E. nostras. Larvae were exposed to fluctuating temperatures (40 °C for 10 h daily and 25 °C for the remaining time) or a constant temperature (25 °C) for an entire week. We found increased mortality of larvae under heat. We detected a reduction in the hunting activity of larvae under heat, which corresponded to changes in the body mass of individuals. Furthermore, we found long-term consequences of the simulated heat wave, as it prolonged the time larvae needed to molt. These effects were pronounced in the case of E. nostras but did not occur or were less pronounced in the case of M. bore, suggesting that microhabitat-specific selective pressures dictate how well antlions handle heat waves. We, thus, present results demonstrating the connection between behavior and the subsequent changes to fitness-relevant traits in the context of a simulated heat wave. These results illustrate how even closely related species may react differently to the same event.

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“…Since most sharks are ectothermic, sudden changes in temperature can be particularly harmful due to altered thermal windows and impairment of vital functions (Bernal et al, 2018; Pegado et al, 2020). However, even endothermic species (as is the case of some species reported in the present study) can be harmed by abrupt alterations as relocating metabolic substrates to maintain body temperature can lead to immunosuppression and subsequent vulnerability to pathogens (Carlisle et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Global assessment of shark strandings

et al. 2022

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Marine wildlife stranding is a global phenomenon that affects both invertebrates and vertebrates (Chan et al., 2017;Cockcroft, 2001). Many definitions are available, being guided mostly by the taxonomic group affected. The National Oceanic and Atmospheric Administration (NOAA) recognizes three main taxonomical categories of strandings: cetaceans, pinnipeds and sea turtles. Stranded animals may be found dead (either on land or floating) or alive but unable to return to sea due to injury or illness. Broader definitions are also available and do not consider taxonomic groups, but simply the presence of an aquatic animal on land, whether dead or alive (but physiologically/physically unable to return to the sea) (

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Impact of a simulated marine heatwave in the hematological profile of a temperate shark (Scyliorhinus canicula)

Cited by 14 publications

References 57 publications

Elasmobranch Responses to Experimental Warming, Acidification, and Oxygen Loss—A Meta-Analysis

Elasmobranch Responses to Experimental Warming, Acidification, and Oxygen Loss—A Meta-Analysis

Heat wave effects on the behavior and life-history traits of sedentary antlions

Global assessment of shark strandings

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