The potential impact of ocean acidification upon eggs and larvae of yellowfin tuna (Thunnus albacares)

Don Bromhead, Vernon Scholey, Simon Nicol, Daniel Margulies, Jeanne Wexler, Maria Stein, Simon Hoyle, Cleridy Lennert-Cody, Jane Williamson, Jonathan Havenhand, Tatiana Ilyina, Patrick Lehodey

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Anthropogenic carbon dioxide (CO2) emissions are resulting in increasing absorption of CO2 by the earth's oceans, which has led to a decline in ocean pH, a process known as ocean acidification (OA). Evidence suggests that OA may have the potential to affect the distribution and population dynamics of many marine organisms. Early life history processes (e.g. fertilization) and stages (eggs, larvae, juveniles) may be relatively more vulnerable to potential OA impacts, with implications for recruitment in marine populations. The potential impact of OA upon tuna populations has not been investigated, although tuna are key components of pelagic ecosystems and, in the Pacific Ocean, form the basis of one of the largest and most valuable fisheries in the world. This paper reviews current knowledge of potential OA impacts on fish and presents results from a pilot study investigating how OA may affect eggs and larvae of yellowfin tuna, Thunnus albacares. Two separate trials were conducted to test the impact of pCO2 on yellowfin egg stage duration, larval growth and survival. The pCO2 levels tested ranged from present day (~400μatm) to levels predicted to occur in some areas of the spawning habitat within the next 100 years (<2500μatm) to 300 years (~<5000μatm) to much more extreme levels (~10,000μatm). In trial 1, there was evidence for significantly reduced larval survival (at mean pCO2 levels≥4730μatm) and growth (at mean pCO2 levels≥2108μatm), while egg hatch time was increased at extreme pCO2 levels≥10,000μatm (*intermediate levels were not tested). In trial 2, egg hatch times were increased at mean pCO2 levels≥1573μatm, but growth was only impacted at higher pCO2 (≥8800μatm) and there was no relationship with survival. Unstable ambient conditions during trial 2 are likely to have contributed to the difference in results between trials. Despite the technical challenges with these experiments, there is a need for future empirical work which can in turn support modeling-based approaches to assess how OA will affect the ecologically and economically important tropical tuna resources.

Original languageEnglish
Pages (from-to)268-279
Number of pages12
JournalDeep-Sea Research Part II: Topical Studies in Oceanography
Volume113
DOIs
Publication statusPublished - Mar 2015
Externally publishedYes

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egg
larva
ocean
pelagic ecosystem
ocean acidification
population dynamics
spawning
life history
carbon dioxide
fishery
trial
habitat
resource
fish
modeling
experiment

Cite this

Bromhead, Don ; Scholey, Vernon ; Nicol, Simon ; Margulies, Daniel ; Wexler, Jeanne ; Stein, Maria ; Hoyle, Simon ; Lennert-Cody, Cleridy ; Williamson, Jane ; Havenhand, Jonathan ; Ilyina, Tatiana ; Lehodey, Patrick. / The potential impact of ocean acidification upon eggs and larvae of yellowfin tuna (Thunnus albacares). In: Deep-Sea Research Part II: Topical Studies in Oceanography. 2015 ; Vol. 113. pp. 268-279.
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abstract = "Anthropogenic carbon dioxide (CO2) emissions are resulting in increasing absorption of CO2 by the earth's oceans, which has led to a decline in ocean pH, a process known as ocean acidification (OA). Evidence suggests that OA may have the potential to affect the distribution and population dynamics of many marine organisms. Early life history processes (e.g. fertilization) and stages (eggs, larvae, juveniles) may be relatively more vulnerable to potential OA impacts, with implications for recruitment in marine populations. The potential impact of OA upon tuna populations has not been investigated, although tuna are key components of pelagic ecosystems and, in the Pacific Ocean, form the basis of one of the largest and most valuable fisheries in the world. This paper reviews current knowledge of potential OA impacts on fish and presents results from a pilot study investigating how OA may affect eggs and larvae of yellowfin tuna, Thunnus albacares. Two separate trials were conducted to test the impact of pCO2 on yellowfin egg stage duration, larval growth and survival. The pCO2 levels tested ranged from present day (~400μatm) to levels predicted to occur in some areas of the spawning habitat within the next 100 years (<2500μatm) to 300 years (~<5000μatm) to much more extreme levels (~10,000μatm). In trial 1, there was evidence for significantly reduced larval survival (at mean pCO2 levels≥4730μatm) and growth (at mean pCO2 levels≥2108μatm), while egg hatch time was increased at extreme pCO2 levels≥10,000μatm (*intermediate levels were not tested). In trial 2, egg hatch times were increased at mean pCO2 levels≥1573μatm, but growth was only impacted at higher pCO2 (≥8800μatm) and there was no relationship with survival. Unstable ambient conditions during trial 2 are likely to have contributed to the difference in results between trials. Despite the technical challenges with these experiments, there is a need for future empirical work which can in turn support modeling-based approaches to assess how OA will affect the ecologically and economically important tropical tuna resources.",
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author = "Don Bromhead and Vernon Scholey and Simon Nicol and Daniel Margulies and Jeanne Wexler and Maria Stein and Simon Hoyle and Cleridy Lennert-Cody and Jane Williamson and Jonathan Havenhand and Tatiana Ilyina and Patrick Lehodey",
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Bromhead, D, Scholey, V, Nicol, S, Margulies, D, Wexler, J, Stein, M, Hoyle, S, Lennert-Cody, C, Williamson, J, Havenhand, J, Ilyina, T & Lehodey, P 2015, 'The potential impact of ocean acidification upon eggs and larvae of yellowfin tuna (Thunnus albacares)', Deep-Sea Research Part II: Topical Studies in Oceanography, vol. 113, pp. 268-279. https://doi.org/10.1016/j.dsr2.2014.03.019

The potential impact of ocean acidification upon eggs and larvae of yellowfin tuna (Thunnus albacares). / Bromhead, Don; Scholey, Vernon; Nicol, Simon; Margulies, Daniel; Wexler, Jeanne; Stein, Maria; Hoyle, Simon; Lennert-Cody, Cleridy; Williamson, Jane; Havenhand, Jonathan; Ilyina, Tatiana; Lehodey, Patrick.

In: Deep-Sea Research Part II: Topical Studies in Oceanography, Vol. 113, 03.2015, p. 268-279.

Research output: Contribution to journalArticle

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T1 - The potential impact of ocean acidification upon eggs and larvae of yellowfin tuna (Thunnus albacares)

AU - Bromhead, Don

AU - Scholey, Vernon

AU - Nicol, Simon

AU - Margulies, Daniel

AU - Wexler, Jeanne

AU - Stein, Maria

AU - Hoyle, Simon

AU - Lennert-Cody, Cleridy

AU - Williamson, Jane

AU - Havenhand, Jonathan

AU - Ilyina, Tatiana

AU - Lehodey, Patrick

PY - 2015/3

Y1 - 2015/3

N2 - Anthropogenic carbon dioxide (CO2) emissions are resulting in increasing absorption of CO2 by the earth's oceans, which has led to a decline in ocean pH, a process known as ocean acidification (OA). Evidence suggests that OA may have the potential to affect the distribution and population dynamics of many marine organisms. Early life history processes (e.g. fertilization) and stages (eggs, larvae, juveniles) may be relatively more vulnerable to potential OA impacts, with implications for recruitment in marine populations. The potential impact of OA upon tuna populations has not been investigated, although tuna are key components of pelagic ecosystems and, in the Pacific Ocean, form the basis of one of the largest and most valuable fisheries in the world. This paper reviews current knowledge of potential OA impacts on fish and presents results from a pilot study investigating how OA may affect eggs and larvae of yellowfin tuna, Thunnus albacares. Two separate trials were conducted to test the impact of pCO2 on yellowfin egg stage duration, larval growth and survival. The pCO2 levels tested ranged from present day (~400μatm) to levels predicted to occur in some areas of the spawning habitat within the next 100 years (<2500μatm) to 300 years (~<5000μatm) to much more extreme levels (~10,000μatm). In trial 1, there was evidence for significantly reduced larval survival (at mean pCO2 levels≥4730μatm) and growth (at mean pCO2 levels≥2108μatm), while egg hatch time was increased at extreme pCO2 levels≥10,000μatm (*intermediate levels were not tested). In trial 2, egg hatch times were increased at mean pCO2 levels≥1573μatm, but growth was only impacted at higher pCO2 (≥8800μatm) and there was no relationship with survival. Unstable ambient conditions during trial 2 are likely to have contributed to the difference in results between trials. Despite the technical challenges with these experiments, there is a need for future empirical work which can in turn support modeling-based approaches to assess how OA will affect the ecologically and economically important tropical tuna resources.

AB - Anthropogenic carbon dioxide (CO2) emissions are resulting in increasing absorption of CO2 by the earth's oceans, which has led to a decline in ocean pH, a process known as ocean acidification (OA). Evidence suggests that OA may have the potential to affect the distribution and population dynamics of many marine organisms. Early life history processes (e.g. fertilization) and stages (eggs, larvae, juveniles) may be relatively more vulnerable to potential OA impacts, with implications for recruitment in marine populations. The potential impact of OA upon tuna populations has not been investigated, although tuna are key components of pelagic ecosystems and, in the Pacific Ocean, form the basis of one of the largest and most valuable fisheries in the world. This paper reviews current knowledge of potential OA impacts on fish and presents results from a pilot study investigating how OA may affect eggs and larvae of yellowfin tuna, Thunnus albacares. Two separate trials were conducted to test the impact of pCO2 on yellowfin egg stage duration, larval growth and survival. The pCO2 levels tested ranged from present day (~400μatm) to levels predicted to occur in some areas of the spawning habitat within the next 100 years (<2500μatm) to 300 years (~<5000μatm) to much more extreme levels (~10,000μatm). In trial 1, there was evidence for significantly reduced larval survival (at mean pCO2 levels≥4730μatm) and growth (at mean pCO2 levels≥2108μatm), while egg hatch time was increased at extreme pCO2 levels≥10,000μatm (*intermediate levels were not tested). In trial 2, egg hatch times were increased at mean pCO2 levels≥1573μatm, but growth was only impacted at higher pCO2 (≥8800μatm) and there was no relationship with survival. Unstable ambient conditions during trial 2 are likely to have contributed to the difference in results between trials. Despite the technical challenges with these experiments, there is a need for future empirical work which can in turn support modeling-based approaches to assess how OA will affect the ecologically and economically important tropical tuna resources.

KW - Carbon dioxide

KW - Growth

KW - Mortality

KW - Ocean acidification

KW - Tuna fisheries

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