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Does Reproductive Investment Decrease Telomere Length in Menidia menidia?

Gao J, Munch SB - PLoS ONE (2015)

Bottom Line: Given finite resources, intense investment in one life history trait is expected to reduce investment in others.However, we did find that more fecund fish tended to have both reduced life expectancy and shorter telomeres.This result is consistent with the hypothesis that there is a trade-off between telomere maintenance and reproductive output.

View Article: PubMed Central - PubMed

Affiliation: Department of Ecology and Evolution, Stony Brook University, Stony Brook, NY, United States of America.

ABSTRACT
Given finite resources, intense investment in one life history trait is expected to reduce investment in others. Although telomere length appears to be strongly tied to age in many taxa, telomere maintenance requires energy. We therefore hypothesize that telomere maintenance may trade off against other life history characters. We used natural variation in laboratory populations of Atlantic silversides (Menidia menidia) to study the relationship between growth, fecundity, life expectancy, and relative telomere length. In keeping with several other studies on fishes, we found no clear dependence of telomere length on age. However, we did find that more fecund fish tended to have both reduced life expectancy and shorter telomeres. This result is consistent with the hypothesis that there is a trade-off between telomere maintenance and reproductive output.

No MeSH data available.


Related in: MedlinePlus

The egg production over time in the four replicates from day 150 to day 200.
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pone.0125674.g006: The egg production over time in the four replicates from day 150 to day 200.

Mentions: The apparent trade-off between reproductive investment and telomere length was also present in total egg production (Fig 4). The average telomere length in the muscle tissue decreased significantly with the average fecundity (slope = -0.0090+/-0.02, R2 = 0.93, p<0.001). Similarly RTL in brain tissue decreased with fecundity, though this result was not significant (slope = -0.0040+/-0.003, R2 = 0.61, p = 0.40). The weekly egg counts in each tank are shown in Fig 6. Eggs were produced in large quantity from day 150 to 178 days and then at a very low rate until the end of the experiment.


Does Reproductive Investment Decrease Telomere Length in Menidia menidia?

Gao J, Munch SB - PLoS ONE (2015)

The egg production over time in the four replicates from day 150 to day 200.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4418813&req=5

pone.0125674.g006: The egg production over time in the four replicates from day 150 to day 200.
Mentions: The apparent trade-off between reproductive investment and telomere length was also present in total egg production (Fig 4). The average telomere length in the muscle tissue decreased significantly with the average fecundity (slope = -0.0090+/-0.02, R2 = 0.93, p<0.001). Similarly RTL in brain tissue decreased with fecundity, though this result was not significant (slope = -0.0040+/-0.003, R2 = 0.61, p = 0.40). The weekly egg counts in each tank are shown in Fig 6. Eggs were produced in large quantity from day 150 to 178 days and then at a very low rate until the end of the experiment.

Bottom Line: Given finite resources, intense investment in one life history trait is expected to reduce investment in others.However, we did find that more fecund fish tended to have both reduced life expectancy and shorter telomeres.This result is consistent with the hypothesis that there is a trade-off between telomere maintenance and reproductive output.

View Article: PubMed Central - PubMed

Affiliation: Department of Ecology and Evolution, Stony Brook University, Stony Brook, NY, United States of America.

ABSTRACT
Given finite resources, intense investment in one life history trait is expected to reduce investment in others. Although telomere length appears to be strongly tied to age in many taxa, telomere maintenance requires energy. We therefore hypothesize that telomere maintenance may trade off against other life history characters. We used natural variation in laboratory populations of Atlantic silversides (Menidia menidia) to study the relationship between growth, fecundity, life expectancy, and relative telomere length. In keeping with several other studies on fishes, we found no clear dependence of telomere length on age. However, we did find that more fecund fish tended to have both reduced life expectancy and shorter telomeres. This result is consistent with the hypothesis that there is a trade-off between telomere maintenance and reproductive output.

No MeSH data available.


Related in: MedlinePlus