Populational genetic structure and sociogenetic structure of cocoon masses of Digelasinus diversipes (Kirby, 1882) (Hymenoptera: Symphyta: Argidae)

Boraschi, Daniele; Lama, Marco Antônio Del

doi:10.1590/s1415-47572004000300013

Cited by 5 publications

(7 citation statements)

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“…nobile differs from the subgeneric standard by 3 fixed inversions (IIL-a, IIIS-1 , and IIIL-b), while S. nodo- The differentiation of ecological ranges which are present in the S. nobile species group corresponds to the 'niche variation' hypothesis which proposes that populations using variable resources would have more genetic and phenotypic variation than populations of more specialized species [Van Valen, 1965]. Evidence supports this hypothesis such as found in the bacterium Pseudomonas fluorescens [Jasmin and Kassen, 2007], in the saw fly [Boraschi and Antonio Del Lama, 2004] and Hawaiian Drosophila [Steiner, 1977]. S. nobile and S. nodosum have different geographical distributions.…”

Section: Discussionmentioning

confidence: 94%

Cytotaxonomy, Morphology and Ecology of the <i>Simulium nobile</i> Species Group (Diptera: Simuliidae) in Thailand

Tangkawanit

Kuvangkadilok²,

Trinachartvanit³

et al. 2011

Cytogenet Genome Res

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The polytene chromosomes of 512 larvae of the Simulium nobile species group collected from 16 stream sites in northern, central and southern Thailand were examined. Band-by- band comparisons relative to the established standard chromosome map for the subgenus Simulium distinguished the 2 species of this group, S. nobile and S. nodosum. The differences are mainly due to the position of the nucleolar organizer, pseudochromocenter, and fixed and polymorphic inversions. S. nobile is a monomorphic species, while S. nodosum is a polymorphic species. The morphology of these taxa is described based on the gill filaments and the color of the antennae and female genitalia. S. nobile is distributed in southern Thailand at low altitudes, whereas the distribution of S. nodosum is in the north at higher altitudes.

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Section: Discussionmentioning

confidence: 94%

Cytotaxonomy, Morphology and Ecology of the <i>Simulium nobile</i> Species Group (Diptera: Simuliidae) in Thailand

Tangkawanit

Kuvangkadilok²,

Trinachartvanit³

et al. 2011

Cytogenet Genome Res

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“…O encontro entre machos e fêmeas torna-se ainda mais fácil no momento em que muitos indivíduos estão emergindo, quando o macho permanece sobre o agregado de onde emergiu e copula com as fêmeas recém-emergidas. De qualquer maneira, a dinâmica demográfica existente na população de D. diversipes e a necessidade de dispersão diferenciada entre os sexos parecem favorecer acasalamentos casualizados (Boraschi & Del Lama 2004).…”

Section: Methodsunclassified

“…Apesar do estudo de Dias (1976) indicar que competição local por acasalamento poderia ocorrer, a associação entre diferentes grupos de larvas durante o processo de alimentação (Dias 1976;Costa & Louque 2001), a possibilidade de fêmeas serem inseminadas por mais de um macho, fenômeno comum em Symphyta (Craig & Mopper 1993) e dispersão diferenciada entre os sexos (Östrand & Anderbrant 2001), dificultaria a ocorrência de taxas elevadas de endogamia nestes insetos (Boraschi & Del Lama 2004), a ponto de justificar os desvios na razão sexual.…”

Section: Methodsunclassified

“…Há indicações de que as fêmeas de D. diversipes são monogâmicas (Boraschi & Del Lama 2004), mas o padrão demográfico observado nesta espécie, juntamente com a grande mobilidade das larvas, dificultaria a endogamia e os desvios observados na razão sexual poderiam estar relacionados à qualidade da planta hospedeira no momento da oviposição. Fêmeas de diferentes espécies de Hymenoptera, sejam aculeados ou parasitóides, ajustam o sexo de sua prole de acordo com a disponibilidade de recursos no ambiente, de modo que o sexo que melhor se beneficiar da maior quantidade de recurso seja preferencialmente produzido (Torchio & Tepedino 1980;Charnov 1982;Brockmann & Grafen 1992;King 1993;Molumby 1997;Strohm & Linsenmair 1997;Martins et al 1999;West & Sheldon 2002;O'Neill & O'Neill 2003;Peruquetti & Del Lama 2003).…”

Section: Methodsunclassified

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Biologia, comportamento social e alocação sexual de Digelasinus diversipes (Kirby, 1882) (Hymenoptera, Argidae)

Boraschi¹,

Peruquetti²,

Lama³

2005

Rev. Bras. entomol.

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ABSTRACT. Biology, social behavior and sex-allocation of Digelasinus diversipes (Kirby, 1882) (Hymenoptera, Argidae). The results of a two-year study of the Neotropical sawfly Digelasinus diversipes are presented. This species is univoltine and common in Estação Ecológica Jataí, a nature reserve of Cerrado vegetation in São Paulo State, Brazil. The larvae feed gregariously on Eugenia glazioviana (Kiaersk.) D. Legrand (Myrtaceae) from November through April. Fusions of different feeding groups were frequent. After the feeding period, larvae congregate and communally construct a cocoon mass (105 cocoons ± 60SD; n = 25) attached to the trunk of the host plant, entering in diapause as prepupae until the beginning of the rainy season in October. The population peak was in December when 62% (n = 2,967) of adult emergence occurred. In experimental conditions, emergence was observed from 6:30 a.m. until 15:00 p.m., but 73.5% (n = 223) of the adults appeared between 9:00 a.m. and 12:00 h. Sex sequence was not observed during emergence but, in a single cocoon mass, males may appear 20 to 40 days earlier than females. After emergence, males may either (1) disperse (early and late in the emergence period; October and November, January and February, respectively) or (2) remain on or near the cocoon mass and mate with newly emerged females (during the emergence peak in December). Copulation lasts 4.28 minutes (±3.4SD; n = 28), and during the day, males may mate with different females (1-8; n = 5); however, females mate only once. Newly emerged females have a mean of 76 mature eggs (± 21SD; n = 19) and oviposited all of them underneath of a single leaf of the host plant. Egg guarding by females lasted only 2 (n = 12) of the 30 days of egg incubation. The female's behavioral repertoire against potential enemies was shorter than that reported for some other sawfly species. Apparently, the female induces necrosis of the leaf tissue that covers the eggs, which forms a hard shelter for the eggs during incubation. Both sexes of D. diversipes do not feed as adults (controlled condition) and have a short life span (5.2 days ± 1.7SD; minimum 1, maximum 11; n = 179). The mean sex ratio was 2.83 (± 0.014SE) in favor of females. Main mortality factors were development defects, lack of food due to intense herbivory, and attack of parasitoids. Parasitoids reared, Lymeon dieloceri (Costa Lima, 1937) (Ichneumonidae), Conura (Spilochalcis) sp. (Chalcididae) and Perilampus sp. (Perilampidae).KEYWORDS. Gregarious feeding; maternal care; Neotropical sawfly; sex ratio; subsocial insect. RESUMO. Biologia, comportamento social e alocação sexual de Digelasinus diversipes (Kirby, 1882) (Hymenoptera, Argidae). São apresentados os resultados de um estudo de dois anos sobre o Symphyta neotropical Digelasinus diversipes. Esta espécie é univoltina e comum na Estação Ecológica Jataí, uma reserva de Cerrado no Estado de São Paulo. As larvas alimentam-se gregariamente em Eugenia glazioviana (Myrtaceae) de novembro a abril. Associações entre grupos de alimenta...

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“…Contributions to the knowledge of three Brazilian species of Argidae are worth mentioning (Dias 1976, Penteado-Dias 1991, Boraschi & Del Lama 2004, Boraschi et al 2005. Dutra (2003) studied cases of bovine intoxication caused by ingestion of sawfl y larvae, and reported on the biology of Perreyia fl avipes Konow (Hymenoptera: Pergidae).…”

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confidence: 99%

Life history of Aneugmenus merida Smith (Hymenoptera: Tenthredinidae) in the Venezuelan Andes

Avila-Núñez¹,

Otero²,

Silmi³

et al. 2007

Neotrop. Entomol.

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História Natural de Aneugmenus merida Smith (Hymenoptera: Tenthredinidae) nos Andes Venezuelanos RESUMO -Detalhes do ciclo de vida de Aneugmenus merida Smith criados em laboratório são relatados. As fêmeas produzem ovos partenogenéticos e não partenogenéticos. Após a eclosão, as lagartas dos machos de A. merida passam cinco ínstares, a pré-pupa, pupa e imago. O ciclo de vida dura cerca de 44 dias. As larvas alimentam-se de samambaia [Pteridium caudatum (L.) e Pteridium arachnoideum (Kaulf)] (Dennstaedtiaceae). Neste estudo também são relatadas observações sobre a morfologia do sinus sexualis, mediante imagens obtidas em microscópio eletrônico de varredura, e detalhes dos comportamentos exibidos durante a cópula. L.) and Pteridium arachnoideum (Kaulf)] (Dennstaedtiaceae). We also report on morphological observations of the sinus sexualis in males by scanning electron micrographs and give details on mating behavior. PALAVRAS-CHAVE

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Populational genetic structure and sociogenetic structure of cocoon masses of Digelasinus diversipes (Kirby, 1882) (Hymenoptera: Symphyta: Argidae)

Cited by 5 publications

References 33 publications

Cytotaxonomy, Morphology and Ecology of the <i>Simulium nobile</i> Species Group (Diptera: Simuliidae) in Thailand

Cytotaxonomy, Morphology and Ecology of the <i>Simulium nobile</i> Species Group (Diptera: Simuliidae) in Thailand

Biologia, comportamento social e alocação sexual de Digelasinus diversipes (Kirby, 1882) (Hymenoptera, Argidae)

Life history of Aneugmenus merida Smith (Hymenoptera: Tenthredinidae) in the Venezuelan Andes

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