Distribuição espacial de formigueiros de Acromyrmex crassispinus (Forel)(Hymenoptera: Formicidae) em plantios de Pinus taeda / Spatial distribution of nests of Acromyrmex crassispinus (Forel) (Hymenoptera: Formicidae) in Pinus taeda plantations
Neotrop. entomol
;
39(6): 862-872, nov.-dic. 2010. tab
Artigo
em Português
| LILACS
| ID: lil-572463
ABSTRACT
The spatial distribution of insects is essential to perform control strategies, to improve sample techniques and to estimate economic losses. We aimed to determine the spatial distribution of nests of Acromyrmex crassispinus (Forel) in Pinus taeda plantations. The experiments were carried out in P. taeda plantations with different ages (treatments recently-planted, three and six-year old plants). The study took place in Rio Negrinho and in Três Barras, SC. Three plots of one hectare were delimited in each treatment, and plots were divided in 64 sample units. The analysis of the dispersion index [variance/mean relationship (I), index of Morisita (Iδ) and k exponent of negative binomial distribution] showed that the majority of the samplings presented random distribution. Among the three distributions of probabilities studied Poisson, positive binomial and negative binomial, the Poisson distribution was the best model to fit the spatial distribution of A. crassispinus nests in all samplings. The result was a random distribution in the plantings of different ages.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Formigas
/
Pinus taeda
/
Comportamento de Nidação
Tipo de estudo:
Estudo prognóstico
Limite:
Animais
Idioma:
Português
Revista:
Neotrop. entomol
Assunto da revista:
Biologia
/
ZOOLOGIA
Ano de publicação:
2010
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Embrapa Florestas/BR
/
Turfal Ind e Com de Prod Biol e Agron Ltda/BR
/
Univ Federal do Paraná/BR
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