Incorporating climate-readiness into fisheries management strategies

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 918, P. 170684 - 170684

Published: Feb. 4, 2024

Tropical oceans are among the first places to exhibit climate change signals, affecting habitat distribution and abundance of marine fish. These changes stocks, subsequent impacts on fisheries production, may have considerable implications for coastal communities dependent food security livelihoods. Understanding tropical is therefore an important step towards developing sustainable, climate-ready management measures. We apply established method spatial meta-analysis assess species modelling datasets key targeted by Philippines capture fisheries. analysed under two global emissions scenarios (RCP4.5 RCP8.5) varying degrees fishing pressure quantify potential vulnerability target community. found widespread responses in pelagic particular, with abundances projected decline across much case study area, highlighting challenges maintaining face a rapidly changing climate. argue that sustainable can only be achieved through strategies allow mitigation of, adaptation to, pressures already locked into system near term. Our analysis support this, providing managers means identify hotspots, bright spots refugia, thereby supporting development plans.

Language: Английский

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Fish embryo vulnerability to combined acidification and warming coincides with low capacity for homeostatic regulation

Journal of Experimental Biology, Journal Year: 2020, Volume and Issue: unknown

Published: Jan. 1, 2020

The vulnerability of fish embryos and larvae to environmental factors is often attributed a lack adult-like organ systems (gills) thus insufficient homeostatic capacity. However, experimental data supporting this hypothesis are scarce. Here, by using Atlantic cod (Gadus morhua) as model, the relationship between embryo (to projected ocean acidification warming) capacity was explored through parallel analyses stage-specific mortality in vitro activity expression major ion pumps (ATP-Synthase, Na+/K+-ATPase, H+-ATPase) co-transporters (NBC1, NKCC1). Immunolocalization these transporters used study ionocyte morphology newly-hatched larvae. Treatment-related until hatch (+20% due occurred primarily during an early period (gastrulation) characterized extremely low transport capacities. Thereafter, decreased with exponential increase all investigated transporters. Significant changes transporter response (+15% activity) warming (-30% expression) indicate some potential for short-term acclimatization, although likely associated energetic trade-offs. Interestingly, whole-larvae enzyme capacities (supported abundant epidermal ionocytes) reached levels similar those previously measured gill tissue adult cod, suggesting that early-life stages without functional gills better equipped terms homeostasis than thought. This implies gastrulation represents critical transition from inherited (maternal) defenses active regulation, which facilitates enhanced resilience later factors.

Language: Английский

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Viability of coastal fish larvae under ocean alkalinity enhancement: from organisms to communities

Published: Feb. 15, 2024

Abstract. Ocean alkalinity enhancement (OAE) stands as a promising carbon dioxide removal technology. Yet, this solution to climate change entails shifts in water chemistry with unknown consequences for marine fish that are critical ecosystem health and food security. With laboratory mesocosm experiment, we show early life stages of can be resistant OAE. We examined metabolic rate, swimming behavior, growth survival Atlantic herring (Clupea harengus) other temperate coastal species. Neither direct physiological nor indirect web-mediated impacts OAE were apparent. This was despite non-CO2-equilibrated (ΔTA = +600 µmol kg-1) induces strong perturbations (ΔpH +0.7, pCO2 75 µatm) compared alternative deployment scenarios. Whilst our results give cause optimism regarding the large-scale application OAE, history (embryos) habitats (open ocean) may prove more vulnerable. Still, study across ecological scales (organism community) exposure times (short- long-term) suggests some populations, including key fisheries species, resilient carbonate changes under

Language: Английский

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Developmental plasticity of the cardiovascular system in oviparous vertebrates: effects of chronic hypoxia and interactive stressors in the context of climate change

Journal of Experimental Biology, Journal Year: 2024, Volume and Issue: 227(20)

Published: Aug. 7, 2024

Animals at early life stages are generally more sensitive to environmental stress than adults. This is especially true of oviparous vertebrates that develop in variable environments with little or no parental care. These organisms regularly experience fluctuations as part their natural development, but climate change increasing the frequency and intensity these events. The developmental plasticity will therefore play a critical role determining future fitness survival. In this Review, we discuss compare phenotypic consequences chronic hypoxia on cardiovascular system vertebrates. particular, focus species-specific responses, windows, thresholds for responses interactive effects other stressors, such temperature hypercapnia. Although important progress has been made, our Review identifies knowledge gaps need be addressed if fully understand impact vertebrate system.

Language: Английский

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The digestive tract as an essential organ for water acquisition in marine teleosts: lessons from euryhaline eels

Zoological Letters, Journal Year: 2021, Volume and Issue: 7(1)

Published: June 21, 2021

Abstract Adaptation to a hypertonic marine environment is one of the major topics in animal physiology research. Marine teleosts lose water osmotically from gills and compensate for this loss by drinking surrounding seawater absorbing intestine. This situation contrast that mammals, which experience net osmotic after seawater. Water absorption fishes made possible (1) removal monovalent ions (desalinization) esophagus, (2) divalent as carbonate (Mg/CaCO 3 ) precipitates promoted HCO − secretion, (3) facilitation NaCl diluted intestine using suite unique transporters. As result, 70–85% ingested absorbed during its passage through digestive tract. Thus, tract an essential organ teleost survival environment. The eel species has been frequently used osmoregulation research laboratories worldwide. possesses many advantages experimental studies, outstanding euryhalinity, enables researchers examine changes structure function direct transfer freshwater In recent years, molecular mechanisms ion transport across epithelial cells (the transcellular route) tight junctions paracellular have elucidated esophagus Thanks rapid progress analytical methods genome databases on teleosts, including eel, identities transporters, channels, pumps junctional proteins clarified at isoform level. 10 y passed since previous reviews subject, it seems relevant timely summarize eels compare with those other mammals comparative evolutionary viewpoints. We also propose future directions field achieve integrative understanding role adaptation regard pathways/mechanisms route, absorption, metabolon formation cellular trafficking Notably, some these already attracted practical attention laboratories.

Language: Английский

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Diel pCO₂ fluctuations alter the molecular response of coral reef fishes to ocean acidification conditions

Molecular Ecology, Journal Year: 2021, Volume and Issue: 30(20), P. 5105 - 5118

Published: Aug. 17, 2021

Environmental partial pressure of CO2 (pCO2 ) variation can modify the responses marine organisms to ocean acidification, yet underlying mechanisms for this effect remain unclear. On coral reefs, environmental pCO2 fluctuates on a regular day-night cycle. Effects future acidification reef fishes might therefore depend their response diel cycle . To evaluate effects brain molecular response, we exposed two common (Acanthochromis polyacanthus and Amphiprion percula) projected levels (750 1,000 µatm) under both stable fluctuating conditions. We found signature elevated species, which included downregulation immediate early genes, indicating lower activity. The transcriptional programme was more strongly affected by higher average in treatment than treatments, but largest difference between treatments. This indicates that change conditions is different living environments. differential regulation related steroid hormones circadian rhythm (CR). Both species exhibited marked expression CR genes among possibly accommodating flexible adaptive approach changes. Our results suggest fluctuations enable phase-shift clocks anticipate changes, thereby avoiding impairments successfully adjust

Language: Английский

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Warming-induced “plastic floors” improve hypoxia vulnerability, not aerobic scope, in red drum (Sciaenops ocellatus)

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 922, P. 171057 - 171057

Published: Feb. 18, 2024

Language: Английский

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Ocean acidification alters the acute stress response of a marine fish

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 858, P. 159804 - 159804

Published: Oct. 28, 2022

Language: Английский

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The extensive transgenerational transcriptomic effects of ocean acidification on the olfactory epithelium of a marine fish are associated with a better viral resistance

BMC Genomics, Journal Year: 2022, Volume and Issue: 23(1)

Published: June 17, 2022

Progressive CO2-induced ocean acidification (OA) impacts marine life in ways that are difficult to predict but likely become exacerbated over generations. Although fishes can balance acid-base homeostasis efficiently, indirect ionic regulation alter neurosensory systems result behavioural abnormalities. In invertebrates, OA also affect immune system function, whether this is the case not fully understood. Farmed fish highly susceptible disease outbreak, yet strategies for overcoming such threats wake of wanting. Here, we exposed two generations European sea bass (Dicentrarchus labrax) end-of-century predicted pH levels (IPCC RCP8.5), with parents (F1) being four years and their offspring (F2) 18 months. Our design included a transcriptomic analysis olfactory rosette (collected from F2) viral challenge (exposing F2 betanodavirus) where assessed survival rates.We discovered trade-offs both sensory after long-term transgenerational exposure OA. Specifically, RNA-Seq rosette, peripheral organ, 18-months-old revealed extensive genes involved ion transport neuronal signalling, including GABAergic signalling. We detected OA-induced up-regulation associated odour transduction, synaptic plasticity, neuron excitability wiring down-regulation energy metabolism. Furthermore, OA-exposure induced innate antiviral immunity (pathogen recognition receptors interferon-stimulated genes) combination protein biosynthetic machinery. Consistently, OA-exposed challenged betanodavirus, which causes damage nervous fish, had acquired improved resistance.F2 acclimation showed superior resistance, though as metabolic transduction programs were altered, odour-mediated behaviours might be consequently impacted. it unveil how propagated between generations, our results reveal that, across plastic responses core feature epithelium transcriptome offspring, will have important consequences cultured wild interacts its environment.

Language: Английский

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Impaired hatching exacerbates the high CO2 sensitivity of embryonic sand lance Ammodytes dubius

Marine Ecology Progress Series, Journal Year: 2022, Volume and Issue: 687, P. 147 - 162

Published: Feb. 3, 2022

Rising oceanic partial pressure of CO 2 (pCO ) could affect many traits in fish early life stages, but only few species to date have shown direct -induced survival reductions. This might partly be because from less -variable, offshore environments higher latitudes are currently underrepresented the literature. We conducted new experimental work on northern sand lance Ammodytes dubius , a key forage Northwest Atlantic banks, which was recently suggested highly -sensitive. In complementary trials, we produced embryos wild, Gulf Maine spawners and reared them at several pCO levels (~400-2000 µatm) combination with static (6, 7, 10°C) dynamic (10→5°C) temperature treatments. Again, consistently observed large, reductions hatching success (-23% 1000 µatm, -61% ~2000 µatm), effects were temperature-independent. To distinguish during development potential impacts itself, some switched between high control treatments just prior hatch. indeed altered patterns, consistent -impaired hypothesis. High also delayed day first hatch one trial peak other, where later-hatched larvae similar size progressively endogenous energy reserves. For context, extracted seasonal projections for Stellwagen Bank (Gulf Maine) regional ensemble simulations, indicated reduction 71% contemporary by 2100. The species’ unusual sensitivity has large ecological scientific ramifications that warrant future in-depth research.

Language: Английский

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