Transfer of Ejaculate and Incorporation of Male-Derived Substances by Females in the Nannoptera Species Group (Diptera: Drosophilidae)

Pitnick, Scott; Markow, Therese A.; Riedy, Michael F.

doi:10.2307/2409929

Cited by 20 publications

(10 citation statements)

References 24 publications

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“…Freshly emerged virgin adults from stock 15090-1698.02 were CO 2 -anaesthetized and separated according to gender and male genitalia. Males were left to mature for 14-20 days and females for 3-4 days (Pitnick et al, 1991). Each male was isolated into a single vial for at least two days prior to each mating recording.…”

Section: Crosses and Copulation Monitoringmentioning

confidence: 99%

Distinct copulation positions in Drosophila pachea males with symmetric or asymmetric external genitalia

Lang

Orgogozo

2012

CTOZ

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Left-right asymmetric genitalia have appeared multiple times independently in insects and have been associated with changes in mating positions. However, there is little experimental data on how the evolution of genital asymmetries may have affected the evolution of mating positions or vice versa. As opposed to its closely-related species, Drosophila pachea has a conspicuous asymmetry in its male genitalia external lobes, with the left lobe being 1.49 ± 0.08 (SD) times longer and thinner than the right lobe. In a laboratory stock, we found that 20% of the males possess fully symmetric lobes. To better understand how asymmetric genitalia may affect mating, we compared D. pachea copulation behaviour between these mutant males and wildtype males. We found that D. pachea wild-type males adopt a one-sided mating posture with the male always one-sided 8.55° ± 1.79° (SD) towards the female’s right side. Within 45-min recordings, all wild-type males did mate whereas 39% of symmetric mutants failed to form a stable mating complex and did not mate. In successful copulations, symmetric mutants also adopted a right-sided mating posture but the angle between male and female bodies was significantly more variable compared to wild-type males. Our results suggest that lobe size asymmetry is required for the formation of a stable mating complex and for the positioning of the male according to a precise angle on the female. However, lobe size asymmetry is not required for D. pachea right-sided mating posture.

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Section: Crosses and Copulation Monitoringmentioning

confidence: 99%

Distinct copulation positions in Drosophila pachea males with symmetric or asymmetric external genitalia

Lang

Orgogozo

2012

CTOZ

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“…For example, a plant's maternal provisions to the seed can provide an environment so favorable for early growth that inbreeding effects are temporarily masked (127, 219). Radiolabelling techniques have been used to document the incorporation of nongenetic ejaculate materials into insect eggs (112,139,140). In polychaetes, the quality of the offspring changes in terms of survival and juvenile size as a function of the mother's age (25,105).…”

Section: Parental Performance Phenotype and Offspring Qualitymentioning

confidence: 99%

Incidence and Consequences of Inherited Environmental Effects

Rossiter

1996

Annu. Rev. Ecol. Syst.

479

424

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Inherited environmental effects are those components of the phenotype that are derived from either parent, apart from nuclear genes. Inherited environmental effects arise as the product of parental genes and the parental environment, or their interation, and can include contributions that reflect the abiotic, nutritional, and other ecological features of a parental environment. Separating the impact of inherited environmental effects from inherited genetic effects on offspring phenotype variation has been and continues to be a challenge. This complexity is represented in the presentation of a qualitative model that distinguishes the possible paths of nongenetic cross-generational transmission. This model serves as the framework for considering the nature, in published works, of what was actually measured. Empirical evidence of inherited environmental effects arising from these pathways is documented for a diversity of plant and animal taxa. From these results one can conclude that the impact of inherited environmental effects on offspring can be positive or negative depending on the nature of the contribution and the ecological context in which the offspring exists. Finally, there is a description of theoretical and experimental efforts to understand the consequences of parental effects relative to their impact on population dynamics, the expression of adaptive phenotype plasticity, and character evolution.

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“…Radiolabel in the ovaries could be derived from reassembled sperm and seminal fluid material, or might be due to specific amino acids from the seminal fluid being absorbed into the yolk protein of the immature egg. Females of several Drosophila species incorporate ejaculatory proteins from males into their eggs (Markow, 1988; Pitnick et al , 1991). In the root weevil Diaprepes abbreviatus , radiolabelled material from males is found in the female’s ovaries and in the fertilized eggs laid 3–4 days after mating (Sirot et al , 2006).…”

Section: Discussionmentioning

confidence: 99%

Transfer and fate of male ejaculate in female Queensland fruit flies

Radhakrishnan

Nair

Raftos

et al. 2008

Physiological Entomology

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Insect seminal fluid commonly comprises a complex cocktail of proteins and other biochemical components that migrate away from the female reproductive tract to sites elsewhere in the female body and elicit changes in female reproductive behaviour. The transfer of male seminal fluid molecules to reproductive and somatic tissues of the female Queensland fruit fly ('Q-fly') Bactrocera tryoni is examined and some putative target sites identified. Male Q-flies are fed a diet containing radiolabelled ( 35 S) amino acids, which are incorporated into male accessory gland products. Radioactivity diminishes within the accessory glands and increases in all assessed parts of the female body during copulation, indicating the transfer of these products into the female soma via the reproductive tract. There are significant changes in the absolute and proportional radioactivity profiles among female tissues over the next 22 h, with substantial reductions in the thorax and increases in the head. This is consistent with accumulation of behaviour-modifying male products at binding sites in the female head. Parallels can be drawn between the data in the present study and seminal fluid distribution profiles and receptor binding documented in other insects.

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Transfer of Ejaculate and Incorporation of Male-Derived Substances by Females in the Nannoptera Species Group (Diptera: Drosophilidae)

Cited by 20 publications

References 24 publications

Distinct copulation positions in Drosophila pachea males with symmetric or asymmetric external genitalia

Distinct copulation positions in Drosophila pachea males with symmetric or asymmetric external genitalia

Incidence and Consequences of Inherited Environmental Effects

Transfer and fate of male ejaculate in female Queensland fruit flies

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