Effects of environmental anoxia and different periods of reoxygenation on oxidative balance in gills of the estuarine crab Chasmagnathus granulata

Oliveira, Ubirajara; Araújo, Alex Sander da Rosa; Belló‐Klein, Adriane; Silva, Roselis S.M. da; Kucharski, Luiz Carlos

doi:10.1016/j.cbpc.2004.09.026

Cited by 106 publications

(48 citation statements)

References 29 publications

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“…In fact, the HSC70/HSP70 concentrations were higher in hatchlings under the near-future warming scenario (for both P CO2 treatments). Their increased oxygen demands in the pelagic realm may be associated with radical oxygen species (ROS) formation, and HSPs are among the molecules that are expressed in response to ROS formation (de Oliveira et al, 2005). Yet, the HSP levels were not indicative of the LT 50 or LT 100 values observed for the two life stages surveyed.…”

Section: Discussionmentioning

confidence: 99%

Differential impacts of ocean acidification and warming on winter and summer progeny of a coastal squid (Loligo vulgaris)

Rosa

Trübenbach

Pimentel

et al. 2014

Journal of Experimental Biology

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Little is known about the capacity of early life stages to undergo hypercapnic and thermal acclimation under the future scenarios of ocean acidification and warming. Here, we investigated a comprehensive set of biological responses to these climate changerelated variables (2°C above winter and summer average spawning temperatures and ΔpH=0.5 units) during the early ontogeny of the squid Loligo vulgaris. Embryo survival rates ranged from 92% to 96% under present-day temperature (13-17°C) and pH (8.0) scenarios. Yet, ocean acidification (pH 7.5) and summer warming (19°C) led to a significant drop in the survival rates of summer embryos (47%, P<0.05). The embryonic period was shortened by increasing temperature in both pH treatments (P<0.05). Embryo growth rates increased significantly with temperature under present-day scenarios, but there was a significant trend reversal under future summer warming conditions (P<0.05). Besides pronounced premature hatching, a higher percentage of abnormalities was found in summer embryos exposed to future warming and lower pH (P<0.05). Under the hypercapnic scenario, oxygen consumption rates decreased significantly in late embryos and newly hatched paralarvae, especially in the summer period (P<0.05). Concomitantly, there was a significant enhancement of the heat shock response (HSP70/HSC70) with warming in both pH treatments and developmental stages. Upper thermal tolerance limits were positively influenced by acclimation temperature, and such thresholds were significantly higher in late embryos than in hatchlings under present-day conditions (P<0.05). In contrast, the upper thermal tolerance limits under hypercapnia were higher in hatchlings than in embryos. Thus, we show that the stressful abiotic conditions inside the embryo's capsules will be exacerbated under near-future ocean acidification and summer warming scenarios. The occurrence of prolonged embryogenesis along with lowered thermal tolerance limits under such conditions is expected to negatively affect the survival success of squid early life stages during the summer spawning period, but not winter spawning.

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Section: Discussionmentioning

confidence: 99%

Differential impacts of ocean acidification and warming on winter and summer progeny of a coastal squid (Loligo vulgaris)

Rosa

Trübenbach

Pimentel

et al. 2014

Journal of Experimental Biology

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“…It has been suggested that such responses may be a strategy to prepare the organisms for oxidative stress in an effort to protect tissues against oxidative damage during re-oxygenation. An important decrease in SOD activity (which occurred after aerobic recuperation) was also detected; and it could have been caused by the accumulation of hydrogen peroxide production during re-oxygenation (de Oliveira et al, 2005). At normoxia, the small levels of ROS produced by the metabolism in normal animal mitochondria come from carrying electrons along the mitochondrial complexes I, II, and III (Turrens, 2003).…”

Section: How Do Invertebrates Face Hypoxia?mentioning

confidence: 95%

Invertebrates Mitochondrial Function and Energetic Challenges

Martínez‐Cruz¹,

Sánchez‐Paz²,

García‐Carreño³

et al. 2012

Bioenergetics

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“…We specifically quantify the capacity to prevent oxidative stress, which results from an imbalance between the rate of production of reactive oxygen species (ROS) and the cell's antioxidant capacity. The rate of production of ROS is inherently linked to metabolism [32,33], and it tends to increase when organisms are pushed towards their thermal limits and/or when they are exposed to cycles of hypoxia and reoxygenation [32][33][34][35]. Although mussels' physiologies appear well suited to the oxidative stress potentially engendered by their intermittently warm and hypoxic lifestyle (coinciding when the shell valves are closed at low tide; [36,37]), available data support a role for variation in susceptibility to oxidative stress in setting different thermal tolerance limits among Mytilus congeners [38,39].…”

Section: Introductionmentioning

confidence: 99%

Micro-scale environmental variation amplifies physiological variation among individual mussels

et al. 2015

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The contributions of temporal and spatial environmental variation to physiological variation remain poorly resolved. Rocky intertidal zone populations are subjected to thermal variation over the tidal cycle, superimposed with micro-scale variation in individuals' body temperatures. Using the sea mussel (Mytilus californianus), we assessed the consequences of this microscale environmental variation for physiological variation among individuals, first by examining the latter in field-acclimatized animals, second by abolishing micro-scale environmental variation via common garden acclimation, and third by restoring this variation using a reciprocal outplant approach. Common garden acclimation reduced the magnitude of variation in tissuelevel antioxidant capacities by approximately 30% among mussels from a wave-protected (warm) site, but it had no effect on antioxidant variation among mussels from a wave-exposed (cool) site. The field-acclimatized level of antioxidant variation was restored only when protected-site mussels were outplanted to a high, thermally stressful site. Variation in organismal oxygen consumption rates reflected antioxidant patterns, decreasing dramatically among protected-site mussels after common gardening. These results suggest a highly plastic relationship between individuals' genotypes and their physiological phenotypes that depends on recent environmental experience. Corresponding context-dependent changes in the physiological meanvariance relationships within populations complicate prediction of responses to shifts in environmental variability that are anticipated with global change.

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Effects of environmental anoxia and different periods of reoxygenation on oxidative balance in gills of the estuarine crab Chasmagnathus granulata

Cited by 106 publications

References 29 publications

Differential impacts of ocean acidification and warming on winter and summer progeny of a coastal squid (Loligo vulgaris)

Differential impacts of ocean acidification and warming on winter and summer progeny of a coastal squid (Loligo vulgaris)

Invertebrates Mitochondrial Function and Energetic Challenges

Micro-scale environmental variation amplifies physiological variation among individual mussels

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