Discovery of potent, unsuspected sampling disparities for Malaise and Moricke traps, as shown for Neotropical Cryptini (Hymenoptera, Ichneumonidae)

Autor(es)

Aguiar, Alexandre P. ^[1] ; Santos, Bernardo F. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Espirito Santo, Dept Ciencias Biol, BR-29043900 Vitoria, ES - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF INSECT CONSERVATION; v. 14, n. 2, p. 199-206, APR 2010.
• Citações Web of Science: 20

Resumo

Malaise and Moricke traps, universally used mostly to sample wasps and flies, are compared for the first time at genus level, focusing on Cryptini, one of the most diverse parasitoid taxa. Conclusions are supported by 10,706 man-hours of activities, 5,569 specimens from 20 Atlantic Forest and Amazon Forest localities, 4.81 Malaise trap-years and 89.09 Moricke trap-years. Substantial taxonomic and sexual biases were detected and quantified for Cryptini and for each of its studied genera. Moricke captured a proportion of Cryptini to other Ichenumonidae almost four times greater than Malaise. Most genera were captured mostly or exclusively by one of the traps only. Generally, Malaise collected 2.4 times more males than females, and 20% more species for males than females; Moricke yielded 2.4 times more females, and 2-4 times more species for females than males. The study scrutinizes and reaches beyond an allegedly known, but widely neglected problem. Data interpretation strongly suggests the necessity of sampling with both traps at once, under the risk that biodiversity investigations might otherwise continue to generate grossly biased results. Trap equivalence is discussed and quantified. (AU)

• Processo FAPESP: 03/08585-6 - Poucos gêneros e muitas espécies? Cladística de Cryptini (Ichneumonidae, Cryptinae) e a natureza da diversidade de parasitoides neotropicais: o Projeto Hympar: com formação de um grupo de trabalho em Hymenoptera Parasitica
• Beneficiário: Alexandre Pires Aguiar
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores