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Differences in Attack Avoidance and Mating Success between Strains Artificially Selected for Dispersal Distance in Tribolium castaneum.

Matsumura K, Miyatake T - PLoS ONE (2015)

Bottom Line: Individuals of both dispersal and non-dispersal types (disperser and non-disperser) are found in a population, suggesting that each type has both costs and benefits for fitness.L-strain males had significantly increased mating success compared to S-strain males, but females did not show a significant difference between the strains.The current results showed the existence of a trade-off between predation avoidance and mating success associated with dispersal types at a genetic level only in males.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Evolutionary Ecology, Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan.

ABSTRACT
Individuals of both dispersal and non-dispersal types (disperser and non-disperser) are found in a population, suggesting that each type has both costs and benefits for fitness. However, few studies have examined the trade-off between the costs and benefits for the types. Here, we artificially selected for walking distance, i.e., an indicator of dispersal ability, in the red flour beetle Tribolium castaneum and established strains with longer (L-strains) or shorter (S-strains) walking distances. We then compared the frequency of predation by the assassin bug Amphibolus venator and the mating frequency of the selected strains. L-strain beetles suffered higher predation risk, than did S-strain beetles. L-strain males had significantly increased mating success compared to S-strain males, but females did not show a significant difference between the strains. The current results showed the existence of a trade-off between predation avoidance and mating success associated with dispersal types at a genetic level only in males. This finding can help to explain the maintenance of variation in dispersal ability within a population.

No MeSH data available.


Related in: MedlinePlus

The number of matings in selected strains (results of selection in the twelfth generation).Filled and open bars show L and S strains, respectively. Error bars show SE.
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pone.0127042.g003: The number of matings in selected strains (results of selection in the twelfth generation).Filled and open bars show L and S strains, respectively. Error bars show SE.

Mentions: Fig 3 (S3 Table) shows the number of matings for the selected strains. Mating success rates for 15 min were significantly different between the L-strains (male: 4.07 ± 0.47, female: 1.96 ± 0.14) and S-strains (male: 3.27 ± 0.38, female: 1.93 ± 0.10, strain: F = 4.27, P = 0.0403). Females had lower mating success than males in all strains (sex: F = 74.94, P < 0.0001), and no significant difference in mating success was found between the selected strains in females (Student’s t-test). No other significant effect was found (strain*sex: F = 3.82, P = 0.0522).


Differences in Attack Avoidance and Mating Success between Strains Artificially Selected for Dispersal Distance in Tribolium castaneum.

Matsumura K, Miyatake T - PLoS ONE (2015)

The number of matings in selected strains (results of selection in the twelfth generation).Filled and open bars show L and S strains, respectively. Error bars show SE.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4430303&req=5

pone.0127042.g003: The number of matings in selected strains (results of selection in the twelfth generation).Filled and open bars show L and S strains, respectively. Error bars show SE.
Mentions: Fig 3 (S3 Table) shows the number of matings for the selected strains. Mating success rates for 15 min were significantly different between the L-strains (male: 4.07 ± 0.47, female: 1.96 ± 0.14) and S-strains (male: 3.27 ± 0.38, female: 1.93 ± 0.10, strain: F = 4.27, P = 0.0403). Females had lower mating success than males in all strains (sex: F = 74.94, P < 0.0001), and no significant difference in mating success was found between the selected strains in females (Student’s t-test). No other significant effect was found (strain*sex: F = 3.82, P = 0.0522).

Bottom Line: Individuals of both dispersal and non-dispersal types (disperser and non-disperser) are found in a population, suggesting that each type has both costs and benefits for fitness.L-strain males had significantly increased mating success compared to S-strain males, but females did not show a significant difference between the strains.The current results showed the existence of a trade-off between predation avoidance and mating success associated with dispersal types at a genetic level only in males.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Evolutionary Ecology, Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan.

ABSTRACT
Individuals of both dispersal and non-dispersal types (disperser and non-disperser) are found in a population, suggesting that each type has both costs and benefits for fitness. However, few studies have examined the trade-off between the costs and benefits for the types. Here, we artificially selected for walking distance, i.e., an indicator of dispersal ability, in the red flour beetle Tribolium castaneum and established strains with longer (L-strains) or shorter (S-strains) walking distances. We then compared the frequency of predation by the assassin bug Amphibolus venator and the mating frequency of the selected strains. L-strain beetles suffered higher predation risk, than did S-strain beetles. L-strain males had significantly increased mating success compared to S-strain males, but females did not show a significant difference between the strains. The current results showed the existence of a trade-off between predation avoidance and mating success associated with dispersal types at a genetic level only in males. This finding can help to explain the maintenance of variation in dispersal ability within a population.

No MeSH data available.


Related in: MedlinePlus