scholarly journals Transgenerational effects decrease larval resilience to ocean acidification and warming but juvenile European sea bass could benefit from higher temperatures in the NE Atlantic

2021 ◽  
Author(s):  
Sarah Howald ◽  
Marta Moyano ◽  
Amélie Crespel ◽  
Louise Cominassi ◽  
Guy Claireaux ◽  
...  
Keyword(s):  
Metabolic Rate ◽  
Ocean Acidification ◽  
Larval Growth ◽  
Sea Bass ◽  
Standard Metabolic Rate ◽  
Routine Metabolic Rate ◽  
Juvenile Growth ◽  
European Sea Bass ◽  
Larval Size ◽  
Size At Metamorphosis

The aim of this study was to investigate the effect of ocean acidification (OA) and warming (OW) as well as the transgenerational effect of OA on larval and juvenile growth and metabolism of a large economically important fish species with a long generation time. Therefore we incubated European sea bass from Brittany (France) for two generations (>5 years in total) under current and predicted OA conditions (PCO2: 650 and 1700 μatm). In the F1 generation both OA condition were crossed with OW (temperature: 15-18 °C and 20-23 °C). We found that OA alone did not affect larval or juvenile growth and OW increased developmental time and growth rates, but OAW decreased larval size at metamorphosis. Larval routine metabolic rate (RMR) and juvenile standard metabolic rate (SMR) were significantly lower in cold compared to warm conditioned fish and also lower in F0 compared to F1 fish. We did not find any effect of OA on RMR or SMR. Juvenile PO2crit was not affected by OA, OW or OAW in both generations. We discuss the potential underlying mechanisms resulting in beneficial effects of OW on F1 larval growth and RMR and in resilience of F0 and F1 larvae and juveniles to OA, but on the other hand resulting in vulnerability of F1, but not F0 larvae to OAW. With regard to the ecological perspective, we conclude that recruitment of larvae and early juveniles to nursery areas might decrease under OAW conditions but individuals reaching juvenile phase might benefit from increased performance at higher temperatures.

scholarly journals An investigation of links between metabolic rate and feed efficiency in European sea bass Dicentrarchus labrax

2021 ◽  
Author(s):  
Charles Rodde ◽  
Hugues de Verdal ◽  
Marc Vandeputte ◽  
François Allal ◽  
Julie Nati ◽  
...  
Keyword(s):  
Body Weight ◽  
Metabolic Rate ◽  
Feed Efficiency ◽  
Dicentrarchus Labrax ◽  
Sea Bass ◽  
Effect Of Temperature ◽  
Routine Metabolic Rate ◽  
Intermittent Flow ◽  
European Sea Bass ◽  
Ad Libitum

Abstract Feed efficiency (FE) is the amount of body weight gain for a given feed intake. Improving FE through selective breeding is key for sustainable finfish aquaculture but its evaluation at individual level is technically challenging. We therefore investigated whether individual routine metabolic rate (RMR) was a predictor of individual FE in the European sea bass Dicentrarchus labrax, a major species in European mariculture. The European sea bass has three genetically distinct populations across its geographical range, namely Atlantic Ocean (AT), West Mediterranean (WM) and East Mediterranean (EM). We compared FE and RMR of fish from these three populations at 18°C or 24°C. We held 200 fish (62 AT, 66 WM and 72 EM) in individual aquaria and fed them from ad libitum down to fasting. Feed efficiency was assessed for an ad libitum feeding rate and for a fixed restricted ration (1% of metabolic body weight.day -1, with metabolic body weight = body weight 0.8). After being refed 12 weeks in a common tank, individual RMR was measured over 36h by intermittent flow respirometry. There was a significant effect of temperature whereby fish at 18°C had greater mean FE (P < 0.05) and lower RMR (P < 0.001). There was also a significant effect of population, where AT fish had lower FE (P < 0.05) and greater RMR (P < 0.001) than WM and EM, at both temperatures. Despite these differences in temperature and population means, individual FE and RMR were not significantly correlated (P > 0.05). Therefore, although the results provide evidence of an association between metabolic rate and FE, RMR was not a predictor of individual FE, for reasons that require further investigation.

scholarly journals The development of contemporary European sea bass larvae (Dicentrarchus labrax) is not affected by projected ocean acidification scenarios

2017 ◽  
Vol 164 (7) ◽  
Author(s):  
Amélie Crespel ◽  
José-Luis Zambonino-Infante ◽  
David Mazurais ◽  
George Koumoundouros ◽  
Stefanos Fragkoulis ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Dicentrarchus Labrax ◽  
Sea Bass ◽  
European Sea Bass ◽  
Sea Bass Larvae

A relationship between metabolic rate and risk-taking behaviour is revealed during hypoxia in juvenile European sea bass

2011 ◽  
Vol 26 (1) ◽  
pp. 134-143 ◽  
Author(s):  
Shaun S. Killen ◽  
Stefano Marras ◽  
Mary R. Ryan ◽  
Paolo Domenici ◽  
David J. McKenzie
Keyword(s):  
Metabolic Rate ◽  
Risk Taking ◽  
Sea Bass ◽  
European Sea Bass

scholarly journals Long-term effects of ocean acidification upon energetics and oxygen transport in the European sea bass (Dicentrarchus labrax, Linnaeus)

2019 ◽  
Vol 166 (9) ◽  
Author(s):  
Amélie Crespel ◽  
Katja Anttila ◽  
Pernelle Lelièvre ◽  
Patrick Quazuguel ◽  
Nicolas Le Bayon ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Oxygen Transport ◽  
Dicentrarchus Labrax ◽  
Sea Bass ◽  
Long Term Effects ◽  
European Sea Bass

scholarly journals European sea bass, <i>Dicentrarchus labrax</i>, in a changing ocean

2014 ◽  
Vol 11 (9) ◽  
pp. 2519-2530 ◽  
Author(s):  
E. C. Pope ◽  
R. P. Ellis ◽  
M. Scolamacchia ◽  
J. W. S. Scolding ◽  
A. Keay ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Early Life ◽  
Dicentrarchus Labrax ◽  
Sea Bass ◽  
Life Stages ◽  
Daily Mortality ◽  
Early Life Stages ◽  
European Sea Bass ◽  
Carbon Dioxide Co2 ◽  
Global Threat

Abstract. Ocean acidification, caused by rising concentrations of carbon dioxide (CO2), is widely considered to be a major global threat to marine ecosystems. To investigate the potential effects of ocean acidification on the early life stages of a commercially important fish species, European sea bass (Dicentrarchus labrax), 12 000 larvae were incubated from hatch through metamorphosis under a matrix of two temperatures (17 and 19 °C) and two seawater pCO2 levels (ambient and 1,000 μatm) and sampled regularly for 42 days. Calculated daily mortality was significantly affected by both temperature and pCO2, with both increased temperature and elevated pCO2 associated with lower daily mortality and a significant interaction between these two factors. There was no significant pCO2 effect noted on larval morphology during this period but larvae raised at 19 °C possessed significantly larger eyes and lower carbon:nitrogen ratios at the end of the study compared to those raised under 17 °C. Similarly, when the incubation was continued to post-metamorphic (juvenile) animals (day 67–69), fish raised under a combination of 19 °C and 1000 μatm pCO2 were significantly heavier. However, juvenile D. labrax raised under this combination of 19 °C and 1000 μatm pCO2 also exhibited lower aerobic scopes than those incubated at 19 °C and ambient pCO2. Most studies investigating the effects of near-future oceanic conditions on the early life stages of marine fish have used incubations of relatively short durations and suggested that these animals are resilient to ocean acidification. Whilst the increased survival and growth observed in this study supports this view, we conclude that more work is required to investigate whether the differences in juvenile physiology observed in this study manifest as negative impacts in adult fish.

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