The scales as a releaser of the copulation attempt in Lepidoptera

1977 ◽  
Vol 64 (7) ◽  
pp. 386-387 ◽  
Author(s):  
T. Ono
Keyword(s):  
Copulation Attempt

Density-dependent plasticity of sequential mate choice in a bushcricket (Orthoptera:Tettigoniidae)

2007 ◽  
Vol 55 (2) ◽  
pp. 123 ◽  
Author(s):  
Gerlind U. C. Lehmann
Keyword(s):  
Population Density ◽  
Mate Choice ◽  
High Density ◽  
High Population Density ◽  
Mating Period ◽  
Search Behaviour ◽  
Accessory Glands ◽  
Sequential Mate Choice ◽  
Mate Sampling ◽  
Copulation Attempt

Mate choice is a common phenomenon in animals and several factors have been proposed as being involved in the acceptance or rejection of a partner. I investigated the effect of population density on the mate-sampling behaviour of female Xederra charactus (bushcrickets). In my study, female bushcrickets adjusted the tactic of sequential mate sampling in response to mate density, visiting a series of up to five different males per night. Under low-density conditions, females visited fewer males in a night and were less likely to reject a copulation attempt than females under high-density conditions. Rejection of a male occurred during 29% of copulations in areas of high population density, but during only 8% in areas of low population density. Moreover, at low densities, females were less likely to reject mates later in the night, which can be interpreted as a reaction to the time constraints of a finite nightly mating period. Females in high-density populations also more often chose males with a higher mass of the spermatophore-producing accessory glands. Due to such choice, females might receive a larger nuptial gift at mating. These results are consistent with tactical models of search behaviour in which females adjust their behaviour to the number of potential mates and the length of the mating period.

Effets de deux mutations neurologiques, minibrain3 et no-bridgeKS49, sur la parade nuptiale chez Drosophila melanogaster

1993 ◽  
Vol 71 (5) ◽  
pp. 985-990 ◽  
Author(s):  
A. Bouhouche ◽  
T. Benziane ◽  
G. Vaysse
Keyword(s):  
Drosophila Melanogaster ◽  
Sequential Analysis ◽  
Low Frequency ◽  
Male Courtship ◽  
Protocerebral Bridge ◽  
Copulation Attempt ◽  
The Brain

Male courtship events of two neurological mutants (nobridgeKS49 (nob) and minibrain3 (mnb)) of Drosophila melanogaster were recorded and subjected to quantitative and sequential analysis. The nob mutation, which disorganizes the protocerebral bridge, causes specific defects in courtship: a low frequency of the copulation attempt and the disappearance of the licking – copulation attempt sequence. Thus, the nob males were unable to copulate with receptive females within the 30-min observation. We think that this may be due to an abnormality in their wing vibrations. The mnb mutant, characterized by a reduction of the brain (by more than 50%), exhibited difficulties in initiating courtship and in maintaining contact with the female during courtship. These courtship defects may be due to visual and locomotor anomalies.

scholarly journals Forced copulation attempt in the Blue-tailed Lizard, Micrablepharus maximiliani (Reinhardt & Luetken, 1862) (Squamata, Gymnophthalmidae) in the Caatinga of Northeastern Brazil

2010 ◽  
Vol 10 (4) ◽  
pp. 347-350 ◽  
Author(s):  
Melissa Gogliath ◽  
Leonardo Barros Ribeiro ◽  
Eliza Maria Xavier Freire
Keyword(s):  
Short Communication ◽  
Rio Grande ◽  
Northeastern Brazil ◽  
Female Mate ◽  
Caatinga Biome ◽  
Forced Copulation ◽  
Copulation Attempt

Forced copulation is characterized by jerky and rapid movements performed by a female in an apparent attempt to escape from a mounting male. This short communication reports a forced copulation attempt by the gymnophthalmid lizard Micrablepharus maximiliani in a forest enclave inside the Caatinga biome, Tenente Laurentino Cruz municipality, Rio Grande do Norte, Brazil. The rejection behavior of the female consisted of running, pushing and hiding from the mounting male. Although the causes of female mate rejection remain unclear, it may be possible that on this occasion the female M. maximiliani may not have been reproductively active and/or avoided the male deliberately.

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