Responses to artificial selection for locomotor activity: A focus on death feigning in red flour beetle
Responses to artificial selection for locomotor activity: A focus on death feigning in red flour beetle
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DOI：
10.1111/jeb.14012
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发表时间：
2022-05-04
影响因子：
2.1
通讯作者：
Miyatake，Takahisa
中科院分区：
文献类型：
--
作者：
Matsumura，Kentarou;Sasaki，Ken;Miyatake，Takahisa
Whole‐organism performance, including locomotor activity, is an important fitness trait in many animals. Locomotor activity is often classified into sprint speed and locomotor endurance and differences in sprint speed and locomotor endurance affect on other traits such as life‐history traits. Previous studies found that locomotor endurance, sprint speed and brain dopamine (DA) levels are correlated with artificial selection for death feigning (an anti‐predator behaviour that we refer to as ‘death‐feigning syndrome’) in some insect species. Thus, if the syndrome has a genetic basis, death feigning, sprint speed and brain DA levels may be affected by artificial selection for locomotor endurance. We artificially selected for locomotor endurance over 10 generations in the red flour beetleTribolium castaneum, and established higher (H) and lower activity (L) strains, then compared their death‐feigning behaviour, sprint speed and brain DA levels. H‐strain beetles exhibited significantly shorter duration of death‐feigning, and significantly higher sprint speeds, suggesting variation in death‐feigning syndrome. Surprisingly, although brain DA expression affects various animal behaviours, we found no significant differences in the brain DA expressions of H‐ and L‐strain beetles. Thus, our results imply genetic correlations between locomotor endurance, sprint speed and death feigning, but not with brain DA expression, suggesting that differences in the biogenic amine results of our and previous studies may reflect differences in behavioural expression mechanisms.AbstractWe investigated effects of artificial selection for locomotor activity on the death‐feigning behavior, sprint speed, and biogenic amines in the red flour beetleTribolium castaneum. There were significantly differences in death‐feigning behavior and sprint speed between selected strains, but not biogenic amines.
