Relating cold tolerance to winterkill for spotted seatrout at its northern latitudinal limits

Ellis, Timothy A.; Buckel, Jeffrey A.; Hightower, Joseph E.; Poland, Stephen J.

doi:10.1016/j.jembe.2017.01.010

Cited by 10 publications

(10 citation statements)

References 43 publications

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“…The larger number of DEGs under acute cold stress as compared to actuate heat stress could be an artifact of the endpoint temperature chosen for this study. Ellis et al (2017) conducted cold tolerance experiments on adult spotted seatrout in North Carolina and found that spotted seatrout could tolerate water temperatures to 5°C for up to five days, after which mortality increased rapidly, and a study by Anweiler et al. (2014) found 91% mortality in juvenile spotted seatrout held at 4.25°C for five days, suggesting that this is the lower limit of temperature tolerance.…”

Section: Discussionmentioning

confidence: 99%

“…Spotted seatrout, Cynoscion nebulosus , is a teleostean fish distributed from coastal waters in New York to the Gulf of Mexico (Bortone, 2002). This species is uncommon north of Chesapeake Bay, most likely due to its low survival in water temperatures below 5°C (Ellis et al, 2017). Spotted seatrout is comprised of several genetically distinct populations throughout its geographic range (Anderson & Karel, 2009; Seyoum et al, 2018; Weinstein & Yerger, 1976), which provides an ideal opportunity to study differences in thermal plasticity among populations.…”

Section: Introductionmentioning

confidence: 99%

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Comparative transcriptomics of spotted seatrout (Cynoscion nebulosus) populations to cold and heat stress

Song

McDowell

2020

Ecology and Evolution

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Resilience to climate change depends on a species' adaptive potential and phenotypic plasticity. The latter can enhance survival of individual organisms during short periods of extreme environmental perturbations, allowing genetic adaptation to take place over generations. Along the U.S. East Coast, estuarine‐dependent spotted seatrout (Cynoscion nebulosus) populations span a steep temperature gradient that provides an ideal opportunity to explore the molecular basis of phenotypic plasticity. Genetically distinct spotted seatrout sampled from a northern and a southern population were exposed to acute cold and heat stress (5 biological replicates in each treatment and control group), and their transcriptomic responses were compared using RNA‐sequencing (RNA‐seq). The southern population showed a larger transcriptomic response to acute cold stress, whereas the northern population showed a larger transcriptomic response to acute heat stress compared with their respective population controls. Shared transcripts showing significant differences in expression levels were predominantly enriched in pathways that included metabolism, transcriptional regulation, and immune response. In response to heat stress, only the northern population significantly upregulated genes in the apoptosis pathway, which could suggest greater vulnerability to future heat waves in this population as compared to the southern population. Genes showing population‐specific patterns of expression, including hpt, acot, hspa5, and hsc71, are candidates for future studies aiming to monitor intraspecific differences in temperature stress responses in spotted seatrout. Our findings contribute to the current understanding of phenotypic plasticity and provide a basis for predicting the response of a eurythermal fish species to future extreme temperatures.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative transcriptomics of spotted seatrout (Cynoscion nebulosus) populations to cold and heat stress

Song

McDowell

2020

Ecology and Evolution

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“…However, overwintering mortality is particularly important in temperate systems like Northwest Atlantic estuarine and coastal waters where sea surface temperature can fluctuate by 20˚C or more between summer and winter [72,73]. Therefore, estimates of overwintering mortality are increasingly important for building more informative population models [18] and to develop better management plans that are able to meet fisheries management goals. Identifying the temperature thresholds where overwintering mortality is entirely temperature dependent are potentially less difficult to incorporate into population models because additional information on food availability, fish size and energy reserves are not needed to quantify mortality.…”

Section: Plos Onementioning

confidence: 99%

“…For many species in seasonal environments, winter months are associated with little or no growth, weight loss and size-selective mortality [14][15][16]. Consequently, recruitment and year-class strength can be strongly controlled by environmental conditions in the winter months [11,[17][18][19]. Furthermore, species assemblages respond rapidly to winter temperature and as such, it is likely important for explaining biogeography and range shifts in the context of global climate change [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Overwintering survivorship and growth of young-of-the-year black sea bass Centropristis striata

2020

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Overwintering conditions have long been known to affect fish survival and year-class strength as well as determine the poleward range limit of many temperate fishes. Despite this known importance, mechanisms controlling overwintering mortality are poorly understood and the tolerance of marine fishes to the combined effects of winter temperature, salinity, and size is rarely quantified. In recent years, higher abundances of the temperate Serranid, black sea bass Centropristis striata, have been observed at latitudes further north than their traditional range suggesting that warming water temperatures, particularly during winter, may be facilitating the establishment of a population at more northern latitudes. To examine overwintering survival of C. striata, the combined effects of temperature, salinity and body mass were quantified in laboratory experiments. We identified 6˚C as the lower incipient lethal temperature for C. striata, below which fish cease feeding, lose weight rapidly and die within 32 days. A short cold exposure experiment indicated that temperatures below 5˚C resulted in mortality events that continued even as the temperature increased slowly to 10˚C, indicating that even short cold snaps can impact survival and recruitment in this species. Importantly, fish in lower salinity lived significantly longer than fish at higher salinity at both 3˚C and 5˚C, suggesting that osmoregulatory stress plays a role in overwintering mortality in this species. Size was not a critical factor in determining overwintering survival of young-of-the-year (YOY) C. striata. Overwintering survival of YOY C. striata can be effectively predicted as a function of temperature and salinity and their interaction with an accelerated failure model to project future range limits. Identifying temperature thresholds may be a tractable way to incorporate environmental factors into population models and stock assessment models in fishes.

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“…In North Carolina, all winter mortality events of telemetered spotted seatrout in their natural environment occurred in water temperatures below 7 °C, and a precipitous increase in natural mortality occurred at water temperatures below ~ 4 °C [52]. Cold tolerance experiments using fish from both North Carolina and South Carolina show that when fish are exposed to water temperatures below ~4 °C, survival is short-term and physiological impairments due to acute cold stress are largely irreversible [53,54].…”

Section: Discussionmentioning

confidence: 99%

Plasticity in Standard and Maximum Aerobic Metabolic Rates in Two Populations of an Estuarine Dependent Teleost, Spotted Seatrout (Cynoscion nebulosus)

Song

Brill

McDowell

2019

Biology

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We studied the effects of metabolic cold adaptation (MCA) in two populations of a eurythermal species, spotted seatrout (Cynoscion nebulosus) along the U.S. East Coast. Fish were captured from their natural environment and acclimated at control temperatures 15 °C or 20 °C. Their oxygen consumption rates, a proxy for metabolic rates, were measured using intermittent flow respirometry during acute temperature decrease or increase (2.5 °C per hour). Mass-specific standard metabolic rates (SMR) were higher in fish from the northern population across an ecologically relevant temperature gradient (5 °C to 30 °C). SMR were up to 37% higher in the northern population at 25 °C and maximum metabolic rates (MMR) were up to 20% higher at 20 °C. We found evidence of active metabolic compensation in the southern population from 5 °C to 15 °C (Q10 < 2), but not in the northern population. Taken together, our results indicate differences in metabolic plasticity between the northern and southern populations of spotted seatrout and provide a mechanistic basis for predicting population-specific responses to climate change.

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Relating cold tolerance to winterkill for spotted seatrout at its northern latitudinal limits

Cited by 10 publications

References 43 publications

Comparative transcriptomics of spotted seatrout (Cynoscion nebulosus) populations to cold and heat stress

Comparative transcriptomics of spotted seatrout (Cynoscion nebulosus) populations to cold and heat stress

Overwintering survivorship and growth of young-of-the-year black sea bass Centropristis striata

Plasticity in Standard and Maximum Aerobic Metabolic Rates in Two Populations of an Estuarine Dependent Teleost, Spotted Seatrout (Cynoscion nebulosus)

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