Premating Isolation Is Determined by Larval‐Rearing Substrates in Cactophilic Drosophila mojavensis. V. Deep Geographic Variation in Epicuticular Hydrocarbons among Isolated Populations

2001 ◽  
Vol 158 (6) ◽  
pp. 585-598 ◽  
Author(s):  
William J. Etges ◽  
Mitchell A. Ahrens
Keyword(s):  
Geographic Variation ◽  
Larval Rearing ◽  
Drosophila Mojavensis ◽  
Isolated Populations ◽  
Premating Isolation ◽  
Cactophilic Drosophila

scholarly journals Does Larval Rearing Diet Lead to Premating Isolation in Spodoptera litura (Fabricius) (Lepidoptera: Noctuidae)?

Insects ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 203
Author(s):  
Xue-Yuan Di ◽  
Bin Yan ◽  
Cheng-Xu Wu ◽  
Xiao-Fei Yu ◽  
Jian-Feng Liu ◽  
...  
Keyword(s):  
Mate Choice ◽  
Spodoptera Litura ◽  
Artificial Diet ◽  
Survival Rates ◽  
Intrinsic Rate Of Increase ◽  
Larval Rearing ◽  
Population Parameters ◽  
Premating Isolation ◽  
Behavioral Isolation ◽  
Rate Of Increase

Host plant preference during the larval stage may help shape not only phenotypic plasticity but also behavioral isolation. We assessed the effects of diet on population parameters and mate choice in Spodoptera litura. We raised larvae fed on tobacco, Chinese cabbage, or an artificial diet, and we observed the shortest developmental time and highest fecundity in individuals fed the artificial diet. However, survival rates were higher for larvae on either of the natural diets. Population parameters including intrinsic rate of increase and finite rate of increase were significantly higher with the artificial diet, but this diet led to a lower mean generation time. Copulation duration, copulation time, and number of eggs reared significantly differed between diets. In terms of mate choice, females on the artificial diet rarely mated with males fed on a natural host. Our results support the hypothesis that different diets may promote behavioral isolation, affecting mating outcomes. Thus, findings for populations fed an artificial diet may not reflect findings for populations in the field.

scholarly journals Geographic Variation in Contact Calls of Feral North American Populations of the Monk Parakeet

The Condor ◽  
2007 ◽  
Vol 109 (2) ◽  
pp. 389-398 ◽  
Author(s):  
Susannah C. Buhrman-Deever ◽  
Amy R. Rappaport ◽  
Jack W. Bradbury
Keyword(s):  
Geographic Variation ◽  
Learning Preferences ◽  
Founder Effects ◽  
Contact Call ◽  
Isolated Populations ◽  
Monk Parakeet ◽  
Call Structure ◽  
Myiopsitta Monachus ◽  
Limited Dispersal ◽  
Contact Calls

Abstract Introduced feral populations offer a unique opportunity to study the effects of social interaction and founder effects on the development of geographic variation in learned vocalizations. Introduced populations of Monk Parakeets (Myiopsitta monachus) have been growing in number since the 1970s, with a mixture of isolated and potentially interacting populations. We surveyed diversity in contact calls of Monk Parakeet populations in Connecticut, Texas, Florida, and Louisiana. Contact call structure differed significantly among the isolated populations in each state. Contact call structure also differed significantly among potentially interacting nest colonies in coastal Connecticut, and these differences did not follow a geographic gradient. Limited dispersal distances, founder effects, and social learning preferences may play a role in call structure differences.

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