Limits...
Juvenile Atlantic cod behavior appears robust to near-future CO2 levels.

Jutfelt F, Hedgärde M - Front. Zool. (2015)

Bottom Line: These effects appear to alter many different types of sensory and cognitive functions; if widespread and persistent, they have the potential to cause ecosystem changes.We found no effect of CO2 treatment on any of the four behaviors tested: activity (F = 1.61, p = 0.33), emergence from shelter (F = 0.13, p = 0.76), relative lateralization (F = 2.82, p = 0.50), and absolute lateralization (F = 0.80, p = 0.26).Our results indicate that the behavior of Atlantic cod could be resilient to the impacts of near-future levels of water CO2.

View Article: PubMed Central - PubMed

Affiliation: Department of Biological and Environmental Sciences, University of Gothenburg, PO Box 463, SE-405 30 Göteborg, Sweden ; The Lovén Centre Kristineberg, Kristineberg 566, SE-451 78 Fiskebäckskil, Sweden.

ABSTRACT

Background: Ocean acidification caused by the anthropogenic release of CO2 is considered a major threat to marine ecosystems. One unexpected impact of elevated water CO2 levels is that behavioral alterations may occur in tropical reef fish and certain temperate fish species. These effects appear to alter many different types of sensory and cognitive functions; if widespread and persistent, they have the potential to cause ecosystem changes.

Methods: We investigated whether economically and ecologically important Atlantic cod also display behavioral abnormalities by exposing 52 juvenile cod to control conditions (500 μatm, duplicate tanks) or an end-of-the-century ocean acidification scenario (1000 μatm, duplicate tanks) for one month, during which time the fish were examined for a range of behaviors that have been reported to be affected by elevated CO2 in other fish. The behaviors were swimming activity, as measured by number of lines crossed per minute, the emergence from shelter, determined by how long it took the fish to exit a shelter after a disturbance, relative lateralization (a measure of behavioral turning side preference), and absolute lateralization (the strength of behavioral symmetry).

Results: We found no effect of CO2 treatment on any of the four behaviors tested: activity (F = 1.61, p = 0.33), emergence from shelter (F = 0.13, p = 0.76), relative lateralization (F = 2.82, p = 0.50), and absolute lateralization (F = 0.80, p = 0.26).

Conclusion: Our results indicate that the behavior of Atlantic cod could be resilient to the impacts of near-future levels of water CO2.

No MeSH data available.


Related in: MedlinePlus

Atlantic cod swimming activity in control and high CO2 water. Mean activity levels of Atlantic cod measured as lines crossed per minute during a 30-minute period. The fish were exposed to either control water or high-pCO2 water for 12–19 days prior to testing (ncontrol = 22, nCO2 = 23). The data represent the mean ± SEM
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
getmorefigures.php?uid=PMC4940919&req=5

Fig1: Atlantic cod swimming activity in control and high CO2 water. Mean activity levels of Atlantic cod measured as lines crossed per minute during a 30-minute period. The fish were exposed to either control water or high-pCO2 water for 12–19 days prior to testing (ncontrol = 22, nCO2 = 23). The data represent the mean ± SEM

Mentions: In the activity trial, a significant tank effect was observed, with fish from one CO2-treated tank exhibiting higher activity than the fish from the other three tanks (p = 0.012). The cause of this increased activity is unknown but could be caused by random size differences, as the higher-activity tank contained two of the largest individuals. However, despite the higher activity in one CO2 tank, there was no significant effect of the treatment (Figure 1) (nested ANOVA; F = 1.61, p = 0.332, ncontrol = 22, nCO2 = 23).Figure 1


Juvenile Atlantic cod behavior appears robust to near-future CO2 levels.

Jutfelt F, Hedgärde M - Front. Zool. (2015)

Atlantic cod swimming activity in control and high CO2 water. Mean activity levels of Atlantic cod measured as lines crossed per minute during a 30-minute period. The fish were exposed to either control water or high-pCO2 water for 12–19 days prior to testing (ncontrol = 22, nCO2 = 23). The data represent the mean ± SEM
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4940919&req=5

Fig1: Atlantic cod swimming activity in control and high CO2 water. Mean activity levels of Atlantic cod measured as lines crossed per minute during a 30-minute period. The fish were exposed to either control water or high-pCO2 water for 12–19 days prior to testing (ncontrol = 22, nCO2 = 23). The data represent the mean ± SEM
Mentions: In the activity trial, a significant tank effect was observed, with fish from one CO2-treated tank exhibiting higher activity than the fish from the other three tanks (p = 0.012). The cause of this increased activity is unknown but could be caused by random size differences, as the higher-activity tank contained two of the largest individuals. However, despite the higher activity in one CO2 tank, there was no significant effect of the treatment (Figure 1) (nested ANOVA; F = 1.61, p = 0.332, ncontrol = 22, nCO2 = 23).Figure 1

Bottom Line: These effects appear to alter many different types of sensory and cognitive functions; if widespread and persistent, they have the potential to cause ecosystem changes.We found no effect of CO2 treatment on any of the four behaviors tested: activity (F = 1.61, p = 0.33), emergence from shelter (F = 0.13, p = 0.76), relative lateralization (F = 2.82, p = 0.50), and absolute lateralization (F = 0.80, p = 0.26).Our results indicate that the behavior of Atlantic cod could be resilient to the impacts of near-future levels of water CO2.

View Article: PubMed Central - PubMed

Affiliation: Department of Biological and Environmental Sciences, University of Gothenburg, PO Box 463, SE-405 30 Göteborg, Sweden ; The Lovén Centre Kristineberg, Kristineberg 566, SE-451 78 Fiskebäckskil, Sweden.

ABSTRACT

Background: Ocean acidification caused by the anthropogenic release of CO2 is considered a major threat to marine ecosystems. One unexpected impact of elevated water CO2 levels is that behavioral alterations may occur in tropical reef fish and certain temperate fish species. These effects appear to alter many different types of sensory and cognitive functions; if widespread and persistent, they have the potential to cause ecosystem changes.

Methods: We investigated whether economically and ecologically important Atlantic cod also display behavioral abnormalities by exposing 52 juvenile cod to control conditions (500 μatm, duplicate tanks) or an end-of-the-century ocean acidification scenario (1000 μatm, duplicate tanks) for one month, during which time the fish were examined for a range of behaviors that have been reported to be affected by elevated CO2 in other fish. The behaviors were swimming activity, as measured by number of lines crossed per minute, the emergence from shelter, determined by how long it took the fish to exit a shelter after a disturbance, relative lateralization (a measure of behavioral turning side preference), and absolute lateralization (the strength of behavioral symmetry).

Results: We found no effect of CO2 treatment on any of the four behaviors tested: activity (F = 1.61, p = 0.33), emergence from shelter (F = 0.13, p = 0.76), relative lateralization (F = 2.82, p = 0.50), and absolute lateralization (F = 0.80, p = 0.26).

Conclusion: Our results indicate that the behavior of Atlantic cod could be resilient to the impacts of near-future levels of water CO2.

No MeSH data available.


Related in: MedlinePlus