Abstract
Exaggerated traits can be costly and are often trade-off against other characters, such as life-history traits. Thus, the evolution of an exaggerated trait is predicted to affect male life-history strategies. However, there has been very little experimental evidence of the impact of the evolution of sexually selected traits on life-history traits. This study investigated whether increased investment in exaggerated traits can generate evolutionary changes in the life-history strategy for armed males. Male flour beetles, Gnatocerus cornutus, have enlarged mandibles that are used in male-male competition, but females lack this character exaggeration completely. We subjected these weapons to 11 generations of bidirectional selection and found a correlated response in pupal survival but not in larval survival or adult longevity in the male. That is, selecting for male mandibles negatively impacted survival during the production of mandibles. There is no correlated response in the life-history traits of the female.
| Original language | English |
|---|---|
| Pages (from-to) | 1737-1743 |
| Number of pages | 7 |
| Journal | Journal of Evolutionary Biology |
| Volume | 24 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 2011 |
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Keywords
- Horned beetle
- Resource allocation
- Sexual selection
- Trade-off
- Weapon
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
Cite this
Immature performance linked with exaggeration of a sexually selected trait in an armed beetle. / Okada, Kensuke; Katsuki, M.; Okada, Y.; Miyatake, Takahisa.
In: Journal of Evolutionary Biology, Vol. 24, No. 8, 08.2011, p. 1737-1743.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Immature performance linked with exaggeration of a sexually selected trait in an armed beetle
AU - Okada, Kensuke
AU - Katsuki, M.
AU - Okada, Y.
AU - Miyatake, Takahisa
PY - 2011/8
Y1 - 2011/8
N2 - Exaggerated traits can be costly and are often trade-off against other characters, such as life-history traits. Thus, the evolution of an exaggerated trait is predicted to affect male life-history strategies. However, there has been very little experimental evidence of the impact of the evolution of sexually selected traits on life-history traits. This study investigated whether increased investment in exaggerated traits can generate evolutionary changes in the life-history strategy for armed males. Male flour beetles, Gnatocerus cornutus, have enlarged mandibles that are used in male-male competition, but females lack this character exaggeration completely. We subjected these weapons to 11 generations of bidirectional selection and found a correlated response in pupal survival but not in larval survival or adult longevity in the male. That is, selecting for male mandibles negatively impacted survival during the production of mandibles. There is no correlated response in the life-history traits of the female.
AB - Exaggerated traits can be costly and are often trade-off against other characters, such as life-history traits. Thus, the evolution of an exaggerated trait is predicted to affect male life-history strategies. However, there has been very little experimental evidence of the impact of the evolution of sexually selected traits on life-history traits. This study investigated whether increased investment in exaggerated traits can generate evolutionary changes in the life-history strategy for armed males. Male flour beetles, Gnatocerus cornutus, have enlarged mandibles that are used in male-male competition, but females lack this character exaggeration completely. We subjected these weapons to 11 generations of bidirectional selection and found a correlated response in pupal survival but not in larval survival or adult longevity in the male. That is, selecting for male mandibles negatively impacted survival during the production of mandibles. There is no correlated response in the life-history traits of the female.
KW - Horned beetle
KW - Resource allocation
KW - Sexual selection
KW - Trade-off
KW - Weapon
UR - http://www.scopus.com/inward/record.url?scp=80955180006&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80955180006&partnerID=8YFLogxK
U2 - 10.1111/j.1420-9101.2011.02303.x
DO - 10.1111/j.1420-9101.2011.02303.x
M3 - Article
C2 - 21615586
AN - SCOPUS:80955180006
VL - 24
SP - 1737
EP - 1743
JO - Journal of Evolutionary Biology
JF - Journal of Evolutionary Biology
SN - 1010-061X
IS - 8
ER -