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
Article
in Portuguese
| LILACS
| ID: lil-572463
Responsible library:
BR1.1
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.
Full text:
Available
Collection:
International databases
Database:
LILACS
Main subject:
Ants
/
Pinus taeda
/
Nesting Behavior
Type of study:
Prognostic study
Limits:
Animals
Language:
Portuguese
Journal:
Neotrop. entomol
Journal subject:
Biology
/
ZOOLOGIA
Year:
2010
Document type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Embrapa Florestas/BR
/
Turfal Ind e Com de Prod Biol e Agron Ltda/BR
/
Univ Federal do Paraná/BR