Mating behaviour of males ofGlossina pallidipesAusten (Diptera: Glonidae)

1979 ◽  
Vol 69 (4) ◽  
pp. 573-588 ◽  
Author(s):  
T. G. T. Jaenson
Keyword(s):  
Fat Body ◽  
Mating Behaviour ◽  
General Relation ◽  
Glossina Pallidipes ◽  
Phase Duration ◽  
Laboratory Rearing ◽  
Moving Vehicle ◽  
Duration Of Copulation ◽  
Low Activity ◽  
Strain Dependent

AbstractThe sexual bahaviour of males ofGlossina pallidipesAust. from the kibwezi Forest Lambwe Valley in Kenya was investigated in the laboratory. Most observatations were on the Kibwezi strain. Three copulatory phases were recorginsed, marked by male courtship, female buzzing, and male jerking with ejaculation. Maturation of copulatory brhaviour occured in advance of ability to inseminate. All males copulated by day 10 and all copulating males inseminated by day 12. Insemination took place only if the jerking phase was present, but neither the occurence of this phase nor the ejection of a spermatophore proved that insemination had taken place. The degree of insemination showed no general relation to age in previously unmated males. The jerking phase was generally shorter in non-inseminating than in inseminating copulations, although duration of copulation showed no obvious relation to the frequency and degree of insemination. The duration of copulation decreased with increasing age of previously unmated males between 10 and 30 days old. Copulation duration was strain-specific while the jerking phase duration was not, suggesting that the length of the pretransmission period (courtship phase plus female buzzing phase) is strain-dependent. In Kibwezi Forest, sexually appetitive (head-down) behaviour among males caught off a moving vehicle was, in geenral, not present among teneral and old males. Head-up and head-down males had small and large amouns of abdominal fat-body, respectively, and both had little gut content. Head-down males had comparatively low activity at dawn and dusk and relatively high middaly activity. The findigs are discussed in relation to the laboratory rearing ofG. pallidipes.

Mating behaviour of females of Glossina pallidipes Austen (Diptera: Glossinidae)

1980 ◽  
Vol 70 (1) ◽  
pp. 49-60 ◽  
Author(s):  
T. G. T Jaenson
Keyword(s):  
Blood Meal ◽  
Field Data ◽  
Mating Behaviour ◽  
Glossina Pallidipes ◽  
Field Studies ◽  
Moving Vehicle ◽  
Residual Blood

AbstractThe mating behaviour of females of Glossina pallidipes Aust. from Kibwezi Forest, Kenya, was investigated in the field and in the laboratory. Field studies showed that very few tenerals were inseminated, that most nulliparous females become inseminated after the first blood-meal and that of females caught on a moving vehicle the majority of recently fed nulliparae were not inseminated while most non-teneral nulliparae with little or no residual blood-meal were inseminated. This suggested a mate-seeking behaviour by uninseminated, non-teneral nulliparae. Field data indicated that multiple insemination occurs in some nulliparae. In the laboratory, few females were receptive until 4–5 days old, which conforms to the field data. Peak receptivity in virgins was reached about nine days after eclosion, when more than 90% copulated. Receptivity in virgins decreased from about two weeks after eclosion. Females permitted one copulation a day between days 0 and 13 copulated, on average, 1·4 times; 38% copulated twice and 2% three times. Receptivity in virgins was higher than in non-virgins, suggesting that one or more components of the copulation affect receptivity.

Acoustic Communication and Mating Behaviour in the Muellerianella Complex (Homoptera - Delphacidae)

Behaviour ◽  
1985 ◽  
Vol 94 (1-2) ◽  
pp. 183-201 ◽  
Author(s):  
S. Drosopoulos
Keyword(s):  
Mating Behavior ◽  
Acoustic Communication ◽  
Parental Species ◽  
Mating Behaviour ◽  
Interspecific Crosses ◽  
Bisexual Species ◽  
Duration Of Copulation ◽  
Isolating Mechanisms ◽  
Copulation Behavior ◽  
Biological Differences

AbstractSome data on acoustic communication and mating behavior of two biparentally reproducing species and the clonally reproducing pseudogamous "species" of the genus Muellerianella are reported. Although bioacoustic differences were found in the calling songs between the species, these did not prevent pairforming. Also, differences in mating behavior, such as pre-copulation behavior, courtship activities, frequency and duration of copulation were not sufficient to prevent successful hybridization between both the two biparentally reproducing species and between each of these two species and the pseudogamous "species". The data reported here are related to other biological differences reported previously. According to these data there is some evidence that differences in acoustic communication and mating behavior between the two species are established by ecological influences which in turn have established analogous physiological requirements. These differences are rather weak isolating mechanisms. Regarding the behavioral relation of the pseudogamous species with males of the two parental species it was found that these females behave exactly as the females of M. fairmairei with which they coexist in the field. In interspecific crosses mechanical barriers to copulation are more efficient than courtship differences. Finally it is assumed that pseudogamy is a strong isolation mechanism between the not yet fully genetically differentiated bisexual species of Muellerianella.

Ecology and behaviour of Glossina pallidipes Austen (Diptera: Glossinidae) in southern Kenya

1981 ◽  
Vol 71 (4) ◽  
pp. 703-715 ◽  
Author(s):  
T. G. T. Jaenson
Keyword(s):  
Glossina Pallidipes ◽  
Cold Season ◽  
Diel Pattern ◽  
Moving Vehicle ◽  
Midday Depression ◽  
Distinct Peak ◽  
Short Rains ◽  
Afternoon Peak

AbstractGlossina pallidipes Aust. was captured from a moving vehicle and in Moloo traps at three-week intervals from October 1975 to December 1976 in the Kibwezi Forest, Kenya. The percentage of teneral flies captured was about twice as high in the vehicle samples as in the traps. Samples in the traps were mainly of older flies, especially parous females. The numbers of G. pallidipes collected in the traps during 20 two-day periods were correlated with those collected from the vehicle. The vehicle-catch levels were less variable than those in the traps. By both methods the highest numbers were collected in September (cold season) and the lowest in November-December (short rains). Attraction to the vehicle followed a bimodal diel pattern at all seasons, with a higher morning (09.30–10.00 h) than afternoon (17.30–18.00 h) peak, and a midday depression at 13.30–14.00 h; the afternoon peak was much reduced in parous females. At all seasons, only one distinct peak (at 15.00–17.00 h) and very low catches at night were exhibited by flies attracted to the traps.

Inbreeding avoidance in aphidophagous ladybird beetles: a case study inMenochilussexmaculatus

2016 ◽  
Vol 94 (5) ◽  
pp. 361-365 ◽  
Author(s):  
Swati Saxena ◽  
Geetanjali Mishra
Keyword(s):  
Inbreeding Depression ◽  
Reproductive Performance ◽  
Mating Disruption ◽  
Mating Behaviour ◽  
Mate Guarding ◽  
Egg Viability ◽  
Laboratory Rearing ◽  
Closed Population ◽  
Spermatophore Transfer

Relatedness among mates affects reproductive performance in insects. Previous studies indicate that laboratory rearing of a closed population leads to a decline in fitness owing to inbreeding depression. Although females possess the ability to discriminate against unsuitable males, it is not clear whether they have the ability to bias paternity against related males. We investigated whether the zig-zag ladybird beetle (Menochilus sexmaculatus (Fabricius, 1781)) (Coleoptera Coccinellidae) has evolved mechanisms to avoid inbreeding. We performed mating disruption experiments among two lines of inbred and outbred individuals and assessed whether mating behaviour (including mating duration and mate guarding) and reproductive performance were affected. Results indicate that females delay the onset of copula when paired with inbred individuals. Decreased fecundity and percent egg viability following mating with inbred mate is indicative of cost of inbreeding. As trends of spermatophore transfer are similar in inbred and outbred pairs, we assume that females modify their reproductive performance when mated with inbred males. Thus, our study reveals that mating with relatives is likely avoided by females, thus preventing inbreeding depression.

scholarly journals Genetic Heterogeneity Among the Founders of Laboratory Populations of Drosophila Melanogaster I. Mating Behaviour

1967 ◽  
Vol 20 (6) ◽  
pp. 1193 ◽  
Author(s):  
Sally M W Hosgood ◽  
PA Parsons
Keyword(s):  
Drosophila Melanogaster ◽  
Genetic Heterogeneity ◽  
Mating Behaviour ◽  
Duration Of Copulation ◽  
Laboratory Populations

Single inseminated founder females in D. mBlanogastB'I' derived from the same population have led to genetically discrete strains for two behavioural traits: the percentage of pairs mated in 60 min, and duration of copulation. The effect of the founder females persists for many generations. These results are in agreement with earlier work on scutellar chaetae.

Laboratory colonization of the tsetse fly Glossina pallidipes Austen (Diptera: Glossinidae) using an in vitro feeding method

1989 ◽  
Vol 79 (3) ◽  
pp. 429-435 ◽  
Author(s):  
P. A. Langley
Keyword(s):  
Mating Behaviour ◽  
Virgin Female ◽  
Glossina Pallidipes ◽  
Tsetse Fly ◽  
Fluorescent Light ◽  
Silicon Rubber ◽  
Feeding Method ◽  
Laboratory Colony ◽  
In Vitro Feeding

AbstractAttempts to establish a laboratory colony of Glossina pallidipes Austen from adults and puparia of Uganda origin (Lugala) sent from a colony previously established in Amsterdam have been highly successful. Flies are maintained at 25 ± 0·5°C, L:D 12:12 and 85% RH. They are fed six days per week on whole defibrinated pig blood collected aseptically and irradiated at 1·5 kGy before storage at 4°C. The blood is presented through silicon rubber membranes at 37°C. Virgin female flies are mated when 7–9 days old with equal numbers of 9–12-day-old males in a 30 × 30 × 10-cm cage covered with white Terylene netting and illuminated with a fluorescent light from above, providing 300–500 lux on the cage bottom. The sexes are left together for 40–48 h, during which time they are offered food twice. After separation of the sexes, 30 females are housed in a cage 15 cm in diameter and two males are added. Flies are kept for 90 days before discarding. The establishment of this colony is discussed in terms of the mating behaviour of the species, highlighting differences in the laboratory between G. pallidipes from Uganda and Zimbabwe and between G. pallidipes and G. morsitans morsitans Westwood.

The Structure and Development of Microbodies in the Fat Body and other Tissues of an Insect (Calpodes Ethlius)

1970 ◽  
Vol 28 ◽  
pp. 148-149
Author(s):  
M. Locke ◽  
J. T. McMahon
Keyword(s):  
Electron Microscopy ◽  
Liquid Crystals ◽  
Fat Body ◽  
Competitive Inhibitor ◽  
Dense Core ◽  
Urate Oxidase ◽  
Blood Proteins ◽  
Free Base ◽  
The Core ◽  
The Matrix

The fat body of insects has always been compared functionally to the liver of vertebrates. Both synthesize and store glycogen and lipid and are concerned with the formation of blood proteins. The comparison becomes even more apt with the discovery of microbodies and the localization of urate oxidase and catalase in insect fat body.The microbodies are oval to spherical bodies about 1μ across with a depression and dense core on one side. The core is made of coiled tubules together with dense material close to the depressed membrane. The tubules may appear loose or densely packed but always intertwined like liquid crystals, never straight as in solid crystals (Fig. 1). When fat body is reacted with diaminobenzidine free base and H2O2 at pH 9.0 to determine the distribution of catalase, electron microscopy shows the enzyme in the matrix of the microbodies (Fig. 2). The reaction is abolished by 3-amino-1, 2, 4-triazole, a competitive inhibitor of catalase. The fat body is the only tissue which consistantly reacts positively for urate oxidase. The reaction product is sharply localized in granules of about the same size and distribution as the microbodies. The reaction is inhibited by 2, 6, 8-trichloropurine, a competitive inhibitor of urate oxidase.

Sign in / Sign up

Export Citation Format

Share Document