Effects of global warming on fishes and fisheries

McKenzie, David; Geffroy, Benjamin; Farrell, Anthony P.

doi:10.1111/jfb.14762

Cited by 34 publications

(14 citation statements)

References 39 publications

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“…It is expected that during gonad maturation broodstock fish have to meet an increased energy demand for gamete production while the capacity of the cardiorespiratory (energy) supply system remains the same (Pörtner & Farrell, 2008). This line of thought implies that energy constraints occur relatively early in fish with mature gonads (often >30% additional body mass), resulting in a relatively narrow thermal tolerance range and increased sensitivity to additional stressors like CO 2 (McKenzie et al ., 2021; Pörtner, 2021). This hypothesis is supported by experiments with Atlantic silversides ( Minidia menidia ), indicating that energy limitations due to warming and elevated p CO 2 led to a significant reduction in female fecundity (Concannon et al ., 2021).…”

Section: Discussionmentioning

confidence: 99%

Broodstock exposure to warming and elevated pCO₂ impairs gamete quality and narrows the temperature window of fertilisation in Atlantic cod

Dahlke

Puvanendran

Mortensen³

et al. 2022

Journal of Fish Biology

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Impacts of global warming and CO2‐related ocean acidification (OA) on fish reproduction may include chronic effects on gametogenesis and gamete quality, as well as acute effects on external fertilisation. Here, temperature thresholds and OA‐sensitivity of gametogenesis and fertilisation were investigated in Atlantic cod, Gadus morhua. Three broodstock groups of farmed cod (FC 1–3) were exposed for 3 months to three maturation conditions (FC 1: control, 6°C/400 μatm CO2; FC 2: warming, 9.5°C/400 μatm; FC 3: warming and OA, 9.5°C/1100 μatm). In addition, a broodstock group of wild cod (WC) was kept at control conditions to compare the acute temperature window of fertilisation with that of farmed cod (FC 1). Fertilisations were conducted in a temperature‐gradient table at 10 temperatures (between −1.5 and 12°C) and two CO2 levels (400/1100 μatm). In FC 1 and WC, fertilisation success was relatively high between 0.5°C and 11°C (TRange of c. 10.5°C), indicating similar gamete quality in farmed and wild broodstocks kept at control conditions. Exposure of farmed broodstocks to warming (FC 2) and the combination of warming and OA (FC 3) impaired gamete quality, causing a reduction in fertilisation success of −20% (FC 2) and − 42% (FC 3) compared to FC 1. The acute temperature window of fertilisation narrowed from FC 1 (TRange = 10.4°C) to FC 2 (TRange = 8.8°C) and FC 3 (TRange = 5.9°C). Acute effects of CO2 on fertilisation success were not significant. This study demonstrates potential climate change impacts on gametogenesis and fertilisation in Atlantic cod, suggesting the loss of spawning habitat in the coming decades.

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Section: Discussionmentioning

confidence: 99%

Broodstock exposure to warming and elevated pCO₂ impairs gamete quality and narrows the temperature window of fertilisation in Atlantic cod

Dahlke

Puvanendran

Mortensen³

et al. 2022

Journal of Fish Biology

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“…Nevertheless, other reasons are also given for wildfires, such as lightning, volcanic eruptions, sparks from falling rocks and spontaneous combustion (Scott, 2000). Nevertheless, heat waves, droughts, periodic climate changes such as El Niño, and regional weather patterns at the edge of high-pressure air can increase the risk of forest fires and fundamentally change how they occur (Mckenzie et al, 2021).…”

Section: Wildfire and Global Warmingmentioning

confidence: 99%

The role of wildfires in a sustainable future

Sharifi¹

2022

10.5267/j.jfs

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Climate change and global warming have led to many risks and changes for the Earth, including the increase in natural fires, floods, air pollution, unusual seasons, etc. The increase in the trend of global warming may bring many countries underwater. For instance, the populous Asian nation of Bangladesh is most vulnerable to rising sea levels. It is estimated that a rise of just one meter in sea level is enough to submerge 30,000 square kilometres of the coastal areas of Bangladesh and displace 15 million people. Therefore, it is crucial to determine the effects of different factors on global warming and take possible actions to reduce the damage. Among various factors, natural fires are believed to be responsible for up to 20% of greenhouse gas production in the world. The source of 80% of fresh water in the United States is believed to be forest lands, which means the effect of natural fires can be disastrous not only for drinking water but also for aquatic habitats. In this paper, we present a survey on the impacts of forest fires on global warming.

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“…increased basal cortisol production caused by increased metabolism. Due to the central role of the HPI axis in coping abilities, understanding the link between basal cortisol level and temperature in fishes is of primary importance for reaching sustainable growth of the aquaculture sector and fisheries industries in the context of global warming (Goikoetxea et al ., 2021; McKenzie et al ., 2021).…”

Section: Introductionmentioning

confidence: 99%

Water temperature explains part of the variation in basal plasma cortisol level within and between fish species

Alfonso

Houdelet

Bessa

et al. 2023

Journal of Fish Biology

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Within the thermal tolerance range of fish, metabolism is known to escalate with warming. Rapid thermic changes also trigger a series of physiological responses, including activation of the stress axis, producing cortisol. Fish have adapted to their environment by producing a low level of plasmatic cortisol when unstressed (basal), so that thriving in their natural temperature should not impact their basal cortisol levels. Yet, surprisingly, little is known on how temperature affects cortisol within and between fish species. Here, we conducted a phylogenetic meta‐analysis to (1) test whether temperature can explain the differences in basal cortisol between species and (2) evaluate the role of temperature on differences in cortisol levels between individuals of a same species. To do this, we retrieved basal plasma cortisol data from 126 studies, investigating 33 marine and freshwater fish species, and correlated it to water temperature. Intra‐species variability in basal plasma cortisol levels was further investigated in two species: the European sea bass Dicentrarchus labrax and the Nile tilapia Oreochromis niloticus. Factors such as life stage, sex and weight were also considered in the analyses. Overall, our phylogenetic analysis revealed a clear positive correlation between basal cortisol level and the temperature at which the fish live. The role of temperature has also been confirmed within D. labrax, while it failed to be significant in O. niloticus. In this paper, the influence of habitat, life stage, sex and weight on basal plasma cortisol levels is also discussed. Since some abiotic parameters were not included in the analysis, our study is a call to encourage scientists to systematically report other key factors such as dissolved oxygen or salinity to fully depict the temperature‐cortisol relationship in fishes.

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Effects of global warming on fishes and fisheries

Cited by 34 publications

References 39 publications

Broodstock exposure to warming and elevated pCO₂ impairs gamete quality and narrows the temperature window of fertilisation in Atlantic cod

Broodstock exposure to warming and elevated pCO₂ impairs gamete quality and narrows the temperature window of fertilisation in Atlantic cod

The role of wildfires in a sustainable future

Water temperature explains part of the variation in basal plasma cortisol level within and between fish species

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Effects of global warming on fishes and fisheries

Cited by 34 publications

References 39 publications

Broodstock exposure to warming and elevated pCO2 impairs gamete quality and narrows the temperature window of fertilisation in Atlantic cod

Broodstock exposure to warming and elevated pCO2 impairs gamete quality and narrows the temperature window of fertilisation in Atlantic cod

The role of wildfires in a sustainable future

Water temperature explains part of the variation in basal plasma cortisol level within and between fish species

Contact Info

Product

Resources

About

Broodstock exposure to warming and elevated pCO₂ impairs gamete quality and narrows the temperature window of fertilisation in Atlantic cod

Broodstock exposure to warming and elevated pCO₂ impairs gamete quality and narrows the temperature window of fertilisation in Atlantic cod