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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

Schematic of flow‐through seawater ocean acidification experimental system for conducting CO2 exposure studies with marine fish.
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ece31678-fig-0001: Schematic of flow‐through seawater ocean acidification experimental system for conducting CO2 exposure studies with marine fish.

Mentions: Thirty‐five fish (0.5–1.5 g each) were randomly stocked into nine separate 76‐L aquaria. The aquaria were randomly placed into one large black tank (5.9 × 1.2 × 0.5 m). Light intensity (1000 lux) and photoperiod (9 L: 15 D) were held constant for the duration of the experiment. Carbon dioxide and air were delivered to equilibrium chambers from a tank of compressed research grade CO2 and an air compressor, respectively, using mass flow controllers (Aalborg Instruments and Controls, Orangeburg, NY) (Fig. 1). The equilibrium chambers contained flow‐through temperature‐controlled (21.4 ± 0.07°C) sand‐filtered seawater that provided each aquarium with a supply of seawater. The same mixture of air (control) and air–CO2 was also constantly bubbled into each corresponding aquarium.


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)

Schematic of flow‐through seawater ocean acidification experimental system for conducting CO2 exposure studies with marine fish.
© Copyright Policy - creativeCommonsBy
Related In: Results  -  Collection

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

ece31678-fig-0001: Schematic of flow‐through seawater ocean acidification experimental system for conducting CO2 exposure studies with marine fish.
Mentions: Thirty‐five fish (0.5–1.5 g each) were randomly stocked into nine separate 76‐L aquaria. The aquaria were randomly placed into one large black tank (5.9 × 1.2 × 0.5 m). Light intensity (1000 lux) and photoperiod (9 L: 15 D) were held constant for the duration of the experiment. Carbon dioxide and air were delivered to equilibrium chambers from a tank of compressed research grade CO2 and an air compressor, respectively, using mass flow controllers (Aalborg Instruments and Controls, Orangeburg, NY) (Fig. 1). The equilibrium chambers contained flow‐through temperature‐controlled (21.4 ± 0.07°C) sand‐filtered seawater that provided each aquarium with a supply of seawater. The same mixture of air (control) and air–CO2 was also constantly bubbled into each corresponding aquarium.

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