Similarity in oviposition aggregation pheromone composition within the <i>Simulium damnosum</i> (Diptera: Simuliidae) species complex

McCall, Philip; Wilson, Michael D.; Dueben, Barbara D.; Bronsvoort, Barend Mark de Clare; Heath, Robert R.

doi:10.1017/s0007485300038700

Cited by 17 publications

(10 citation statements)

References 27 publications

(46 reference statements)

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“…Fig. 1) occurred consistently in volatile collections and ovary extracts, in all species studied within this species complex, and that those peaks were associated with attraction of site seeking ovipositing flies (McCall, 1995;McCall et al, 1997). In the multiple choice bioassay results presented here, the fraction containing these two compounds, fraction 3, attracted a signdicantly greater number of ovipositions than any other fraction, confirming the role of these two compounds as constituents of the oviposition aggregation pheromone.…”

Section: Discussionsupporting

confidence: 73%

Oviposition pheromone in the Simulium damnosum complex: biological activity of chemical fractions from gravid ovaries

McCall

Heath

Dueben

et al. 1997

Physiological Entomology

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Abstract. Communal oviposition in the Afrotropical blackfly species complex Simulium damnosum Theobald (Diptera: Simuliidae) is mediated by a pheromone emitted by freshly laid eggs. Previously, two compounds (designated peaks A and B) emanating from fresh eggs were shown to be associated with attractiveness to gravid blackflies in bioassay. The present study investigated the role of these compounds by testing the responses of wild-caught Simulium yahense in Ghana to fractionated hexane extracts of gravid ovaries prepared by gas chromatography (GC). Although the fractions were prepared from Sierra Leonean Simulium teonense, GC analysis of the emissions from fresh Xyahense eggs showed that the volatile blends of both species were similar. When tested in a two-choice bioassay, 66% of ovipositing blackflies chose the substrate baited with a mixture of the four fractions recombined. In a series of bioassays testing responses to the four individual fractions presented with a control in a multiple-choice arrangement, only fraction 3 (containing peaks A and B) attracted significantly more ovipositions than the other fractions and control. However, fraction 3 failed to elicit a significant response when presented as the sole attractant with a control in a two-choice bioassay. It was concluded that fraction 3, though mainly responsible for mediating aggregated oviposition by S.yahense, was acting in tandem with additional cues, probably further chemicals, which remain to be isolated and characterized.

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Section: Discussionsupporting

confidence: 73%

Oviposition pheromone in the Simulium damnosum complex: biological activity of chemical fractions from gravid ovaries

McCall

Heath

Dueben

et al. 1997

Physiological Entomology

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“…muscid, calliphorid, and scarcophagid flies) (43, 218) or by pheromonal or microbial odor stimuli associated with conspecific females at feeding or oviposition sites (e.g. simuliid, psychodid, calliphorid, and anthomyiid flies) (18,59,117,148,206). Conversely, after oviposition, females of tephritid, agromyzid, and other anthomyiid species deposit host-marking pheromone, which deters repeated egg laying at sites that can support only a limited number of larvae (158,178,198).…”

Section: Dipteramentioning

confidence: 99%

JOINING ANDAVOIDANCEBEHAVIOR INNONSOCIALINSECTS

Prokopy

Roitberg

2001

Annu. Rev. Entomol.

153

110

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Groups of two or more consexual conspecific adults of many kinds of nonsocial insects have been observed to form at feeding, mating, ovipositional, or sheltering sites. Conversely, adults of these same insects have been observed to avoid joining consexual conspecifics (or their progeny) and to place themselves (or their progeny) at some distance that results in spacing. Examples from various taxa illustrate that mechanisms underlying joining or avoidance behavior differ among species, as do types of benefits and costs to individuals who decide to join or avoid others. Moreover, within a given species, the decision to join or avoid others can be affected markedly by the physiological and informational state of the individual and by contextual response thresholds to resource availability. Decisions that benefit the individual may or may not affect the group in terms of total reproductive output.

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“…Furthermore described a sample of 20 flies as being 'dark' and belonging to the forest group. McCall et al (1997) used some flies from Bioko in their analysis of oviposition aggregation pheromone and concluded that the composition of the pheromone was similar throughout the S. damnosum complex.…”

Section: Introductionmentioning

confidence: 99%

Cytotaxonomy, morphology and molecular systematics of the Bioko form of Simulium yahense (Diptera: Simuliidae)

Post

Flook

Millest

et al. 2003

Bull. Entomol. Res.

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Cytotaxonomic analysis of the polytene chromosomes from larvae of the Simulium damnosum Theobald complex from the island of Bioko in Equatorial Guinea is reported, and a new endemic cytoform is described. Chromosomally this cytoform is close to both S. squamosum (Enderlein) and S. yahense Vajime & Dunbar, but is not identical to either. However, it is morphologically and enzymatically identical to S. yahense. The Bioko form was also found to differ from other cytoforms of the S. damnosum complex in West Africa in the copy number or RFLP pattern of several different repetitive DNA sequences. It is clear that the Bioko form is genetically distinct from other populations of the S. damnosum complex, and whilst it is closest to S. yahense, it shows features that suggest a high degree of geographical and genetic isolation. Such isolation is an important consideration in the assessment of the potential for onchocerciasis vector eradication on Bioko.

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Similarity in oviposition aggregation pheromone composition within the Simulium damnosum (Diptera: Simuliidae) species complex

Cited by 17 publications

References 27 publications

Oviposition pheromone in the Simulium damnosum complex: biological activity of chemical fractions from gravid ovaries

Oviposition pheromone in the Simulium damnosum complex: biological activity of chemical fractions from gravid ovaries

JOINING ANDAVOIDANCEBEHAVIOR INNONSOCIALINSECTS

Cytotaxonomy, morphology and molecular systematics of the Bioko form of Simulium yahense (Diptera: Simuliidae)

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