Genetic variation for aerial dispersal behavior in the Banks grass mite

1993 ◽  
Vol 17 (6) ◽  
pp. 461-471 ◽  
Author(s):  
David C. Margolies
Keyword(s):  
Genetic Variation ◽  
Aerial Dispersal ◽  
Dispersal Behavior ◽  
Banks Grass Mite

Allozyme diversity and gene flow in the bark beetle, Dendroctonus jeffreyi (Coleoptera: Scolytidae)

1999 ◽  
Vol 29 (3) ◽  
pp. 315-323 ◽  
Author(s):  
Diana L Six ◽  
T D Paine ◽  
J Daniel Hare
Keyword(s):  
Genetic Variation ◽  
Gene Flow ◽  
Geographic Isolation ◽  
Average Heterozygosity ◽  
Allozyme Diversity ◽  
Dendroctonus Jeffreyi ◽  
Jeffrey Pine ◽  
Population Average ◽  
Pine Beetle ◽  
Dispersal Behavior

Genetic variation within and among 10 California populations of the Jeffrey pine beetle, Dendroctonus jeffreyi Hopkins, was assessed using allozymes. Of 21 loci assayed, 6 were polymorphic in at least one population. Average heterozygosity across all populations and loci was 4%. Genetic distance among the populations ranged from 0.001 to 0.060. The two most southern populations were the most differentiated. At two loci, alleles were present in the southern populations that were not present in any northern populations. The southern populations were also lacking an allele at one locus that was present in all northern populations. Geographic isolation is apparently responsible for allowing the divergence of the southern populations. A dendrogram estimating the relationships among the 10 populations was developed using restricted maximum likelihood. Evidence of inbreeding was found, which in these beetles may be closely tied to population size and dispersal behavior.

AERIAL DISPERSAL BEHAVIOR OF LARVAL BAGWORMS, THYRIDOPTERYX EPHEMERAEFORMIS (LEPIDOPTERA: PSYCHIDAE)

1986 ◽  
Vol 118 (6) ◽  
pp. 525-536 ◽  
Author(s):  
David L. Cox ◽  
Daniel A. Potter
Keyword(s):  
Abiotic Factors ◽  
Dispersal Distance ◽  
Juniperus Virginiana ◽  
Diel Periodicity ◽  
Host Condition ◽  
Aerial Dispersal ◽  
Dispersal Behavior ◽  
Subsequent Behavior ◽  
Neonate Larvae ◽  
Dispersal Period

AbstractSeasonal and daily patterns of ballooning, and behavioral processes involved in aerial dispersal of the bagworm, Thyridopteryx ephemeraeformis (Haworth), were studied on Juniperus virginiana L. in Kentucky. The aerial dispersal period began in mid-May 1983 and lasted ca. 1 month. About 75% of dispersing larvae ballooned after making a bag. Settling velocities were determined for larvae with and without bags and trailing varying lengths of silk; a model was then developed that predicts dispersal distance for a particular wind speed and departure height. Most aerial dispersal is probably short-range. The bag reduced potential dispersal distance, but larvae with bags survived ca. 2 days longer than those without bags when exposed to abiotic factors off of a host. Larvae without bags ballooned mostly in morning, whereas 80% of the larvae dispersing with a bag ballooned in the afternoon. These patterns may be related to the diel periodicity of emergence of neonate larvae from old female bags, and the subsequent behavior of 1st instars prior to dispersal. A large proportion of each cohort emigrates regardless of host condition.

scholarly journals GENETIC VARIATION FOR DISPERSAL BY DROSOPHILA PSEUDOOBSCURA AND DROSOPHILA PERSIMILIS

Genetics ◽  
1986 ◽  
Vol 112 (2) ◽  
pp. 229-235
Author(s):  
Louis Bernard Klaczko ◽  
Charles E Taylor ◽  
Jeffrey R Powell
Keyword(s):  
Genetic Variation ◽  
Spatial Variation ◽  
Habitat Preferences ◽  
Drosophila Pseudoobscura ◽  
Heterogeneous Environment ◽  
Dispersal Behavior ◽  
Drosophila Persimilis ◽  
Different Strains

ABSTRACT Release-recapture experiments using Drosophila pseudoobscura and D. persimilis strains of different karyotypes were performed in a heterogeneous environment. The heterogeneity was due to both spatial variation and the species of yeast used to attract the released flies. No karyotypic-specific habitat preferences were detected. However, in all releases, different strains did behave differently with respect to one or both of the heterogeneous factors. These results indicate there is variation for dispersal behavior in these species that is most likely based on genotype-dependent habitat preferences.

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