Could future ocean acidification be affecting the energy budgets of marine fish?

Conservation Physiology, Год журнала: 2024, Номер 12(1)

Опубликована: Янв. 1, 2024

Abstract With the unprecedented environmental changes caused by climate change including ocean acidification, it has become crucial to understand responses and adaptive capacity of fish better predict directional in ecological landscape future. We conducted a systematic literature review examine if simulated acidification (sOA) could influence growth reproduction within dynamic energy budget theory framework. As such, we chose metabolic rate, locomotion, food assimilation early life stages (i.e. larvae juvenile) adults. Our goal was evaluate acclimatization sOA any these traits explore potential implications for energetic trade-offs reproduction. found that had negligible effects on expenditure maintenance aerobic metabolism due robust physiological regulating acid–base ion perturbations but substantive growth. demonstrated evidence significantly reduced performance stages, which may have resulted from intake digestion efficiency. Also, our results showed enhance with increased numbers offspring although this come at cost altered reproductive behaviours or fitness. While indicate budgets because sOA, heterogeneity suggests neural mechanisms need be clearly elucidated future studies. Lastly, most studies been necessitates more should adults success thus cohort population dynamics under ongoing change.

Язык: Английский

---

Parental thermal conditions affect the brain activity response to alarm cue in larval zebrafish

PeerJ, Год журнала: 2024, Номер 12, С. e18241 - e18241

Опубликована: Окт. 10, 2024

Temperature is a crucial factor affecting the physiology of ectothermic animals, but exposure to elevated temperature during specific life stages and across generations may confer fish resilience through phenotypic plasticity. In this study, we investigate effects developmental parental on brain activity response an olfactory cue in larval zebrafish, Danio rerio . We exposed parents reproduction their offspring development control (28 °C) or (30 observed telencephalon alarm using live calcium imaging. Parental decreased time till maximum regardless offspring’s temperature, revealing that thermal conditions can affect excitability neural circuitry. Furthermore, duration was affected by interaction between conditions, where longer seen when either were temperature. Conversely, found shorter same as parents, both This could represent anticipatory effect influencing match environment, early occurring within susceptible short window post-fertilization. Overall, our results suggest warming alter processes involved transmission show aid preparation respond stimuli environment.

Язык: Английский

---

Comment on egusphere-2024-616

Опубликована: Май 9, 2024

Abstract. Anthropogenic warming and nutrient over-enrichment of our oceans have resulted in significant, often catastrophic, reductions dissolved oxygen (deoxygenation). Stress on water-breathing animals from this deoxygenation has been shown to occur at all levels biological organization: cellular; organ; individual; species; population; community; ecosystem. Most climate forecasts predict increases ocean deoxygenation, thus it is essential develop reliable indicators stress that can be used by regional global monitoring efforts detect assess the impacts life. This review focuses low-oxygen are manifest different organization a variety spatial temporal scales. We compare particular attributes these threshold response, time-scales sensitive life stages taxa, ability scale response across organization. Where there available evidence, we discuss interactions other abiotic stressors stress. address utility, confounding effects, implementation for both research societal applications. Our hope further refinement dissemination will provide more direct support environmental managers, fisheries mariculture scientists, conservation professionals, policy makers confront challenges deoxygenation. An improved understanding sensitivity species, communities ecosystems low empower design programs, ecosystem health, management guidelines, track conditions, events.

Язык: Английский

---

Comment on egusphere-2024-616

Опубликована: Июль 24, 2024

Abstract. Anthropogenic warming and nutrient over-enrichment of our oceans have resulted in significant, often catastrophic, reductions dissolved oxygen (deoxygenation). Stress on water-breathing animals from this deoxygenation has been shown to occur at all levels biological organization: cellular; organ; individual; species; population; community; ecosystem. Most climate forecasts predict increases ocean deoxygenation, thus it is essential develop reliable indicators stress that can be used by regional global monitoring efforts detect assess the impacts life. This review focuses low-oxygen are manifest different organization a variety spatial temporal scales. We compare particular attributes these threshold response, time-scales sensitive life stages taxa, ability scale response across organization. Where there available evidence, we discuss interactions other abiotic stressors stress. address utility, confounding effects, implementation for both research societal applications. Our hope further refinement dissemination will provide more direct support environmental managers, fisheries mariculture scientists, conservation professionals, policy makers confront challenges deoxygenation. An improved understanding sensitivity species, communities ecosystems low empower design programs, ecosystem health, management guidelines, track conditions, events.

Язык: Английский

---

Ocean acidification

Oxford University Press eBooks, Год журнала: 2024, Номер unknown, С. 72 - 96

Опубликована: Дек. 26, 2024

Abstract Ocean acidification describes the decline in pH of marine environments as they continue to absorb anthropogenically-derived carbon dioxide (CO2). Research over past ~15 years has reported that levels ocean forecasted for end century (CO2 ~800–1000 µatm; ~7.6–7.7) can severely impair behaviours animals, including fishes and invertebrates. Impaired most concern are those linked with neural sensory systems, such capacity respond appropriately predators. However, after an initial proliferation studies reporting dire behavioural disturbances, finding negligible effects end-of-century began accumulate. We have now reached a point where there is little consensus on whether, how much, will impact animal behaviour. Here, we outline existing knowledge regarding behaviour, discuss chronology discoveries controversies field, provide guidance improving rigour transparency ecology more broadly.

Язык: Английский

---

Effects of Hypoxia on Anti-Predator Behavior of English Sole (Parophrys vetulus) and Speckled Sanddabs (Citharichthys stigmaeus)

Опубликована: Янв. 1, 2023

Predator detection and successful escape behaviors are critical to the survival of juvenile fish. However, rising temperatures increased nutrient pollution result in more frequent hypoxic events (i.e., low dissolved oxygen levels), which may impact fish health survival. This research examined effects hypoxia on two flatfish species commonly found Elkhorn Slough, an important nursery habitat central California. English sole speckled sanddabs were exposed five DO treatments ranging from 8.0 mg/L (normoxic) 1.0 (severely hypoxic). A startle response trial was used examine increasingly conditions reactions a simulated predator. To evaluate whether visual olfactory senses for predator affected by increasing levels hypoxia, underwent two-part presence trial. understand if exposure impacts ability predators, placed direct predation displayed altered including declines responsiveness, slower movements, shifts failure avoid predation. Changes anti-predator behavior these likely have further negative function population replenishment offshore fishery. Quantifying organismal tolerance environmental change can be develop effective management strategies.

Язык: Английский

---