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Effect of ocean acidification on growth and otolith condition of juvenile scup, Stenotomus chrysops.

Perry DM, Redman DH, Widman JC, Meseck S, King A, Pereira JJ - Ecol Evol (2015)

Bottom Line: Elevated levels of pCO2 (1200-2600 μatm) had no statistically significant effect on growth, survival, or otolith condition after 8 weeks of rearing.X-ray analysis of the fish revealed a slightly higher incidence of hyperossification in the vertebrae of a few scup from the highest treatments compared to fish from the control treatments.Our results show that juvenile scup are tolerant to increases in seawater pCO2, possibly due to conditions this species encounters in their naturally variable environment and their well-developed pH control mechanisms.

View Article: PubMed Central - PubMed

Affiliation: U.S. Department of Commerce National Oceanic and Atmospheric Administration Northeast Fisheries Science Center Milford Laboratory 212 Rogers Avenue Milford Connecticut 06460.

ABSTRACT
Increasing amounts of atmospheric carbon dioxide (CO2) from human industrial activities are causing changes in global ocean carbonate chemistry, resulting in a reduction in pH, a process termed "ocean acidification." It is important to determine which species are sensitive to elevated levels of CO2 because of potential impacts to ecosystems, marine resources, biodiversity, food webs, populations, and effects on economies. Previous studies with marine fish have documented that exposure to elevated levels of CO2 caused increased growth and larger otoliths in some species. This study was conducted to determine whether the elevated partial pressure of CO2 (pCO2) would have an effect on growth, otolith (ear bone) condition, survival, or the skeleton of juvenile scup, Stenotomus chrysops, a species that supports both important commercial and recreational fisheries. Elevated levels of pCO2 (1200-2600 μatm) had no statistically significant effect on growth, survival, or otolith condition after 8 weeks of rearing. Field data show that in Long Island Sound, where scup spawn, in situ levels of pCO2 are already at levels ranging from 689 to 1828 μatm due to primary productivity, microbial activity, and anthropogenic inputs. These results demonstrate that ocean acidification is not likely to cause adverse effects on the growth and survivability of every species of marine fish. X-ray analysis of the fish revealed a slightly higher incidence of hyperossification in the vertebrae of a few scup from the highest treatments compared to fish from the control treatments. Our results show that juvenile scup are tolerant to increases in seawater pCO2, possibly due to conditions this species encounters in their naturally variable environment and their well-developed pH control mechanisms.

No MeSH data available.


Related in: MedlinePlus

Mean length (±SE) versus time for juvenile scup exposed to elevated levels of CO2. Error bars are SE of three replicate groups per treatment.
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ece31678-fig-0003: Mean length (±SE) versus time for juvenile scup exposed to elevated levels of CO2. Error bars are SE of three replicate groups per treatment.

Mentions: Although there was an observable trend toward a greater weight and length gain in the scup from the higher CO2, low‐pH treatments, these results were not statistically significant (HPD interval, P > 0.05, Figs 2 and 3). Specific growth rates (%/day ± SE) were 5.37 ± 0.07, 5.23 ± 0.05, and 5.27 ± 0.03 for fish from the high‐level, mid‐level, and control treatments, respectively. Scup exposed to both the high‐ and mid‐level treatments of CO2 gained the most weight over the course of the experiment (Fig. 2). Juvenile scup from the high exposure treatments increased in mean (±SE) weight from 1.03 ± 0.03 g to 20.90 ± 0.3 g, a gain of 19.87 g. Fish from the mid‐level treatments began with an initial mean (±SE) weight of 1.06 ± 0.03 g and grew to a final mean (±SE) weight of 19.80 ± 0.3 g, a gain of 18.7 g. Scup from the control treatments gained the least weight with an initial mean (±SE) weight of 0.99 ± 0.03 g and a final mean (±SE) weight of 18.83 ± 0.3 g, a gain of 17.84 g (Fig. 2).


Effect of ocean acidification on growth and otolith condition of juvenile scup, Stenotomus chrysops.

Perry DM, Redman DH, Widman JC, Meseck S, King A, Pereira JJ - Ecol Evol (2015)

Mean length (±SE) versus time for juvenile scup exposed to elevated levels of CO2. Error bars are SE of three replicate groups per treatment.
© Copyright Policy - creativeCommonsBy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4588644&req=5

ece31678-fig-0003: Mean length (±SE) versus time for juvenile scup exposed to elevated levels of CO2. Error bars are SE of three replicate groups per treatment.
Mentions: Although there was an observable trend toward a greater weight and length gain in the scup from the higher CO2, low‐pH treatments, these results were not statistically significant (HPD interval, P > 0.05, Figs 2 and 3). Specific growth rates (%/day ± SE) were 5.37 ± 0.07, 5.23 ± 0.05, and 5.27 ± 0.03 for fish from the high‐level, mid‐level, and control treatments, respectively. Scup exposed to both the high‐ and mid‐level treatments of CO2 gained the most weight over the course of the experiment (Fig. 2). Juvenile scup from the high exposure treatments increased in mean (±SE) weight from 1.03 ± 0.03 g to 20.90 ± 0.3 g, a gain of 19.87 g. Fish from the mid‐level treatments began with an initial mean (±SE) weight of 1.06 ± 0.03 g and grew to a final mean (±SE) weight of 19.80 ± 0.3 g, a gain of 18.7 g. Scup from the control treatments gained the least weight with an initial mean (±SE) weight of 0.99 ± 0.03 g and a final mean (±SE) weight of 18.83 ± 0.3 g, a gain of 17.84 g (Fig. 2).

Bottom Line: Elevated levels of pCO2 (1200-2600 μatm) had no statistically significant effect on growth, survival, or otolith condition after 8 weeks of rearing.X-ray analysis of the fish revealed a slightly higher incidence of hyperossification in the vertebrae of a few scup from the highest treatments compared to fish from the control treatments.Our results show that juvenile scup are tolerant to increases in seawater pCO2, possibly due to conditions this species encounters in their naturally variable environment and their well-developed pH control mechanisms.

View Article: PubMed Central - PubMed

Affiliation: U.S. Department of Commerce National Oceanic and Atmospheric Administration Northeast Fisheries Science Center Milford Laboratory 212 Rogers Avenue Milford Connecticut 06460.

ABSTRACT
Increasing amounts of atmospheric carbon dioxide (CO2) from human industrial activities are causing changes in global ocean carbonate chemistry, resulting in a reduction in pH, a process termed "ocean acidification." It is important to determine which species are sensitive to elevated levels of CO2 because of potential impacts to ecosystems, marine resources, biodiversity, food webs, populations, and effects on economies. Previous studies with marine fish have documented that exposure to elevated levels of CO2 caused increased growth and larger otoliths in some species. This study was conducted to determine whether the elevated partial pressure of CO2 (pCO2) would have an effect on growth, otolith (ear bone) condition, survival, or the skeleton of juvenile scup, Stenotomus chrysops, a species that supports both important commercial and recreational fisheries. Elevated levels of pCO2 (1200-2600 μatm) had no statistically significant effect on growth, survival, or otolith condition after 8 weeks of rearing. Field data show that in Long Island Sound, where scup spawn, in situ levels of pCO2 are already at levels ranging from 689 to 1828 μatm due to primary productivity, microbial activity, and anthropogenic inputs. These results demonstrate that ocean acidification is not likely to cause adverse effects on the growth and survivability of every species of marine fish. X-ray analysis of the fish revealed a slightly higher incidence of hyperossification in the vertebrae of a few scup from the highest treatments compared to fish from the control treatments. Our results show that juvenile scup are tolerant to increases in seawater pCO2, possibly due to conditions this species encounters in their naturally variable environment and their well-developed pH control mechanisms.

No MeSH data available.


Related in: MedlinePlus