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.

scholarly journals Is the perceived resiliency of fish larvae to ocean acidification masking more subtle effects?

2013 ◽  
Vol 10 (10) ◽  
pp. 17043-17070 ◽  
Author(s):  
E. C. Pope ◽  
R. P. Ellis ◽  
M. Scolamacchia ◽  
J. W. S. Scolding ◽  
A. Keay ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Early Life ◽  
Fish Larvae ◽  
Dicentrarchus Labrax ◽  
Sea Bass ◽  
Life Stages ◽  
Daily Mortality ◽  
Early Life Stages ◽  
European Sea Bass ◽  
Near Future

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 pCO2s (400 and 750 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. These results suggest that D. labrax larvae are resilient to near-future oceanic conditions. However, when the incubation was continued to post-metamorphic (juvenile) animals (day 67–69), fish raised under a combination of 19 °C and 750 μatm pCO2 were significantly heavier and exhibited lower aerobic scopes than those incubated at 19 °C and 400 μatm. Most other 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 these animals are resilient to ocean acidification. We propose the durations of these other studies may be insufficient for more subtle effects, such as those observed in this study, to become apparent. These findings may have important implications for both sea bass in a changing ocean and also for the interpretation of results from other studies that have shown resiliency in marine teleosts exposed to higher atmospheric concentrations of CO2.

Survival, growth and feeding in early life stages of European sea bass (Dicentrarchus labrax) intensively cultured under different stocking densities

Aquaculture ◽  
2002 ◽  
Vol 205 (1-2) ◽  
pp. 89-102 ◽  
Author(s):  
A. Hatziathanasiou ◽  
M. Paspatis ◽  
M. Houbart ◽  
P. Kestemont ◽  
S. Stefanakis ◽  
...  
Keyword(s):  
Early Life ◽  
Dicentrarchus Labrax ◽  
Sea Bass ◽  
Life Stages ◽  
Early Life Stages ◽  
European Sea Bass

Otolith Sr Concentration Analyzed by PIXE in Ariake Estuary-Dependent Sea Bass Juveniles

1997 ◽  
Vol 07 (03n04) ◽  
pp. 147-151 ◽  
Author(s):  
TARO OHTA ◽  
NOBUAKI ARAI ◽  
MASARU TANAKA ◽  
KOJI YOSHIDA
Keyword(s):  
Early Life ◽  
Sea Bass ◽  
Life Stages ◽  
Early Life Stages ◽  
Lateolabrax Japonicus ◽  
X Ray ◽  
Chikugo River ◽  
Freshwater Environments ◽  
Japanese Sea Bass ◽  
Ambient Salinity

Japanese sea bass (Lateolabrax japonicus) is a typical euryhaline marine fish and frequently migrates from salt to freshwater environments during early life stages. We hypothesized that strontium concentrations in the otolith could be a useful index to examine freshwater entry because of its lower concentration in freshwater. Otoliths of Japanese sea bass juveniles collected in the Chikugo river and estuary were analyzed by Particle Induced X-ray Emission (PIXE) to see relationship between strontium concentration and ambient salinity. Strontium concentrations in otoliths of sea bass juveniles are significantly lower in the river samples than in brackish water samples.

scholarly journals Combined impacts of elevated CO2 and anthropogenic noise on European sea bass (Dicentrarchus labrax)

2016 ◽  
Vol 74 (4) ◽  
pp. 1230-1236 ◽  
Author(s):  
Danielle A. Poulton ◽  
Cosima S. Porteus ◽  
Stephen D. Simpson
Keyword(s):  
Elevated Co2 ◽  
Low Frequency ◽  
Dicentrarchus Labrax ◽  
Sea Bass ◽  
Ventilation Rate ◽  
Anthropogenic Noise ◽  
Pile Driving ◽  
European Sea Bass ◽  
Ventilatory Responses ◽  
Carbon Dioxide Co2

Ocean acidification (OA) and anthropogenic noise are both known to cause stress and induce physiological and behavioural changes in fish, with consequences for fitness. OA is also predicted to reduce the ocean's capacity to absorb low-frequency sounds produced by human activity. Consequently, anthropogenic noise could propagate further under an increasingly acidic ocean. For the first time, this study investigated the independent and combined impacts of elevated carbon dioxide (CO2) and anthropogenic noise on the behaviour of a marine fish, the European sea bass (Dicentrarchus labrax). In a fully factorial experiment crossing two CO2 levels (current day and elevated) with two noise conditions (ambient and pile driving), D. labrax were exposed to four CO2/noise treatment combinations: 400 µatm/ambient, 1000 µatm/ambient, 400 µatm/pile-driving, and 1000 µatm/pile-driving. Pile-driving noise increased ventilation rate (indicating stress) compared with ambient noise conditions. Elevated CO2 did not alter the ventilation rate response to noise. Furthermore, there was no interaction effect between elevated CO2 and pile-driving noise, suggesting that OA is unlikely to influence startle or ventilatory responses of fish to anthropogenic noise. However, effective management of anthropogenic noise could reduce fish stress, which may improve resilience to future stressors.

scholarly journals Effects of Offshore Wind Farms on the Early Life Stages of Dicentrarchus labrax

2016 ◽  
pp. 197-204
Author(s):  
Elisabeth Debusschere ◽  
Bert De Coensel ◽  
Sofie Vandendriessche ◽  
Dick Botteldooren ◽  
Kris Hostens ◽  
...  
Keyword(s):  
Early Life ◽  
Dicentrarchus Labrax ◽  
Wind Farms ◽  
Offshore Wind ◽  
Life Stages ◽  
Early Life Stages ◽  
Offshore Wind Farms

scholarly journals Early Life Stages in Japanese sea bass-II. Developmental Changes in Multiple Oil Globules of Japanese Sea Bass Eggs.

1999 ◽  
Vol 65 (2) ◽  
pp. 268-277 ◽  
Author(s):  
Naoshi Makino ◽  
Masashi Uchiyama ◽  
Shigeyuki Iwanami ◽  
Tadatugu Tohyama ◽  
Masaru Tanaka
Keyword(s):  
Early Life ◽  
Sea Bass ◽  
Developmental Changes ◽  
Life Stages ◽  
Early Life Stages ◽  
Japanese Sea Bass

scholarly journals Effect of ocean acidification on early life stages of Atlantic herring (<i>Clupea harengus</i> L.)

2011 ◽  
Vol 8 (12) ◽  
pp. 3697-3707 ◽  
Author(s):  
A. Franke ◽  
C. Clemmesen
Keyword(s):  
Ocean Acidification ◽  
Linear Relationship ◽  
Early Life ◽  
Clupea Harengus ◽  
Control Treatment ◽  
Future Research ◽  
Atlantic Herring ◽  
Life Stages ◽  
Early Life Stages ◽  
Newly Hatched Larvae

Abstract. Due to atmospheric accumulation of anthropogenic CO2 the partial pressure of carbon dioxide (pCO2) in surface seawater increases and the pH decreases. This process known as ocean acidification might have severe effects on marine organisms and ecosystems. The present study addresses the effect of ocean acidification on early developmental stages, the most sensitive stages in life history, of the Atlantic herring (Clupea harengus L.). Eggs of the Atlantic herring were fertilized and incubated in artificially acidified seawater (pCO2 1260, 1859, 2626, 2903, 4635 μatm) and a control treatment (pCO2 480 μatm) until the main hatch of herring larvae occurred. The development of the embryos was monitored daily and newly hatched larvae were sampled to analyze their morphometrics, and their condition by measuring the RNA/DNA ratios. Elevated pCO2 neither affected the embryogenesis nor the hatch rate. Furthermore the results showed no linear relationship between pCO2 and total length, dry weight, yolk sac area and otolith area of the newly hatched larvae. For pCO2 and RNA/DNA ratio, however, a significant negative linear relationship was found. The RNA concentration at hatching was reduced at higher pCO2 levels, which could lead to a decreased protein biosynthesis. The results indicate that an increased pCO2 can affect the metabolism of herring embryos negatively. Accordingly, further somatic growth of the larvae could be reduced. This can have consequences for the larval fish, since smaller and slow growing individuals have a lower survival potential due to lower feeding success and increased predation mortality. The regulatory mechanisms necessary to compensate for effects of hypercapnia could therefore lead to lower larval survival. Since the recruitment of fish seems to be determined during the early life stages, future research on the factors influencing these stages are of great importance in fisheries science.

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