Temperature and salinity effects on whole-organism and cellular level stress responses of the sub-Antarctic notothenioid fish Patagonotothen cornucola yolk-sac larvae

Bruno, Daniel Osvaldo; Barrantes, María Eugenia; Lattuca, María Eugenia; Nardi, Cristina Fernanda; Diaz, Marina V.; Wolinski, Laura; Sacristán, Hernán Javier; Vanella, Fabián Alberto; Fernández, Daniel A.

doi:10.1007/s10695-022-01057-5

Cited by 3 publications

(1 citation statement)

References 72 publications

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“…Studies on the thermal tolerance and physiology of larval and juvenile cryonotothenioids are limited to just two Antarctic nototheniid species (Evans et al 2012;Davis et al 2018;Naslund et al 2021) and one bathydraconid species (Flynn et al 2015;Flynn and Todgham 2018), all of which were collected from the McMurdo Sound HAZ region. We summarize current information on thermal tolerance for juvenile, larval, and egg stages of cryonotothenioids and one sub-Antarctic larval notothenioid (Bruno et al 2022) in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Thermal tolerance of larval Antarctic cryonotothenioid fishes

Corso,

Mowatt-Larssen,

Brill

et al. 2024

Polar Biol

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Cryonotothenioids constitute a subgroup of notothenioid fishes endemic to the Southern Ocean that are specialized to exist in a narrow range of near-freezing temperatures. Due to the challenges of reliably collecting and maintaining larval cryonotothenioids in good condition, most thermal tolerance studies have been limited to adult and juvenile stages. With increasing environmental pressures from climate change in Antarctic ecosystems, it is important to better understand the impacts of a warming environment on larval stages as well. In this study, we determine the critical thermal maxima (CTmax) of cryonotothenioid larvae collected in pelagic net tows during three research cruises near the western Antarctic Peninsula. We sampled larvae of seven species representing three cryonotothenioid families—Nototheniidae, Channichthyidae, and Artedidraconidae. For channichthyid and nototheniid species, CTmax values ranged from 8.6 to 14.9 °C and were positively correlated with body length, suggesting that younger, less motile larvae may be especially susceptible to rapid warming events such as marine heatwaves. To our knowledge, this is the first published test of acute thermal tolerance for any artedidraconid, with CTmax ranging from 13.2 to 17.8 °C, which did not correlate with body length. Of the two artedidraconid species we collected, Neodraco skottsbergi showed remarkable tolerance to warming and was the only species to resume normal swimming following trials. We offer two hypotheses as to why N. skottsbergi has such an elevated thermal tolerance: (1) their unique green coloration serves as camouflage within near-surface phytoplankton blooms, suggesting they occupy an especially warm near-surface niche, and (2) recent insights into their evolutionary history suggest that they are derived from taxa that may have occupied warm tide-pool habitats. Collectively, these results establish N. skottsbergi and larval channichthyids as groups of interest for future physiological studies to gain further insights into the vulnerability of cryonotothenioids to a warming ocean.

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Section: Introductionmentioning

confidence: 99%

Thermal tolerance of larval Antarctic cryonotothenioid fishes

Corso,

Mowatt-Larssen,

Brill

et al. 2024

Polar Biol

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Biochemical composition and transcriptome analysis revealed nutrients consumption and physiological characteristics of Chinese sturgeon larvae during yolk-sac stage

Li,

Zhou,

Jiang

et al. 2025

Aquaculture

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Influence of coastal oceanography on early life history traits of larval Patagonian sprat, Sprattus fuegensis along southeastern Pacific Ocean

López‐Soto,

Ord,

Castillo

et al. 2024

Fisheries Oceanography

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Early life history traits of small pelagic fish are usually affected by environmental conditions. Patagonian sprat, Sprattus fuegensis, is a small pelagic fish that inhabits the continental shelf, fjords and channels of Patagonia. Their larvae are usually exposed to large variations in physical and biological conditions. We evaluated the effects of environmental conditions on early life history traits of this key species encompassing over 20 years of information. The characterization of oceanographic features, larval abundance and distribution was carried out in western Patagonia between 1996 and 2019, while the growth and mortality rates were estimated for the austral spring 2019 between 49°54′S and 53°55′S. Larval abundance decreased three to ten times from 1996 to 1997 to the rest of the study period (2008–2010 and 2014–2019), with larger abundances being found over the shelf. In spring 2019, the growth rate was 0.20 ± 0.05 mm d−1 for larvae between 9 and 19 days after hatching. The growth rate was similar in partially stratified (7–50 J m−3) and stratified waters (50–100 J m−3), but slower in mixed waters (< 7 J m−3). GAM modelling showed that the faster larval growth occurred in partially stratified waters with temperatures above 7.5°C. Natural mortality rates were higher in partially stratified waters (24% of daily loss), lower in stratified areas (14%) and the lowest in the mixed water column (12%). Accordingly, larvae living in channels had faster growth rates but higher daily mortality, while those that hatched or were advected to water parcels on the continental shelf had slower growth but lower daily mortality. Finally, these latter traits may be an example of an inverse growth‐selective survival strategy.

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Temperature and salinity effects on whole-organism and cellular level stress responses of the sub-Antarctic notothenioid fish Patagonotothen cornucola yolk-sac larvae

Cited by 3 publications

References 72 publications

Thermal tolerance of larval Antarctic cryonotothenioid fishes

Thermal tolerance of larval Antarctic cryonotothenioid fishes

Biochemical composition and transcriptome analysis revealed nutrients consumption and physiological characteristics of Chinese sturgeon larvae during yolk-sac stage

Influence of coastal oceanography on early life history traits of larval Patagonian sprat, Sprattus fuegensis along southeastern Pacific Ocean

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