Research Article

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Behavior; Drosophila ananassae; Ethological isolation; Non-sexual behavior; Selection; Sexual behavior

Drosophila ananassae has a unique status among Drosophila species because of certain peculiarities in its genetic behavior. The most unusual feature of this species is its relatively high frequency of spontaneous male recombination. The results of studies on non-sexual behavior, such as phototactic responses, eclosion rhythm, and preferences for oviposition and ... more

S.Ram Singh; B.N. Singh
09/30/2007
Behavior; Competition effects; Heritability; Review; Swine

A review of previous studies is presented on estimates of genetic parameters and responses to selection with traditional breeding approaches, on correlations between agonistic behavior and growth performance, and on theoretical frameworks for selection incorporating interactions among individuals and on practical methods for incorporating competition effects in breeding programs.

C.Y. Chen; R.K. Johnson; L.D. Van Vleck; S. Newman
06/16/2009
Behavior; Cell provisioning and oviposition process; Colony homeostasis; Interactions; Meliponinae; Virgin queens

We studied the behavior of virgin queens of the stingless bee species Schwarziana quadripunctata, Paratrigona lineata and Tetragona clavipes, investigating internal nest activities, including the cell provisioning and oviposition process. We made direct observation of queen behavior, with the aid of video filming. Forty-four virgin queens of S. quadripunctata ... more

F.H. Nogueira-Ferreira; E.V. Silva-Matos; R. Zucchi
06/30/2009
Molecular markers; Single sequence repeats; Stingless bees

Many factors have contributed to reductions in wild populations of stingless bees, such as: deforestation, displacement and destruction of nests by honey gatherers, as well as use of insecticides and other agrochemicals. All of these can potentially affect the populational structure of native species. We analyzed genetic variability and populational structure of Melipona scutellaris, ... more

G.A. Carvalho-Zilse; M.F.F. Costa-Pinto; C.G. Nunes-Silva; W.E. Kerr
05/12/2009
greenhouse; pollination; Stingless bees; strawberry

We investigated the success of two stingless bee species in pollinating strawberries in greenhouses. Three greenhouses and one open field area were used; one greenhouse had only strawberry plants (control), another (G1) had three colonies of Scaptotrigona aff. depilis and another (G2) had three colonies of Nannotrigona testaceicornis. In the open field area, the ... more

A.C. Roselino; S.B. Santos; M. Hrncir; L.R. Bego
06/09/2009
colony size; Melipona bicolor; pollen foragers; queen numbers; seasonality; Stingless bees

We evaluated the ratio between the number of pollen foragers and the total number of bees entering colonies of Melipona bicolor, a facultative polygynous species of stingless bees. The variables considered in our analysis were: seasonality, colony size and the number of physogastric queens in each colony. The pollen forager ratios varied significantly between seasons; the ratio was ... more

S.D. Hilário; V.L. Imperatriz-Fonseca
05/19/2009
Hygienic behavior; Melipona beecheii; Meliponini; Scaptotrigona pectoralis; Stingless bees

Hygienic behavior, a trait that may confer resistance to brood diseases in the honey bee Apis mellifera, was studied in two species of stingless bees in Mexico. Eight colonies each of Melipona beecheii and Scaptotrigona pectoralis were tested for hygienic behavior, the removal of dead or diseased brood, by freeze killing a comb of sealed cells containing pupae. Both ... more

L.M. Medina; A.G. Hart; F.L.W. Ratnieks
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Hygienic behavior; Plebeia remota; Stingless bees

We investigated hygienic behavior in 10 colonies of Plebeia remota, using the pin-killed method. After 24 h the bees had removed a mean of 69.6% of the dead brood. After 48 h, the bees had removed a mean of 96.4% of the dead brood. No significant correlation was found between the size of the brood comb and the number of dead pupae removed, and there was no apparent effect of the ... more

P. Nunes-Silva; V.L. Imperatriz-Fonseca; L.S. Gonçalves
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AFLP; Population differentiation; Species-specific marker; SSCP; Stingless bees; Trigona collina

A molecular maker for authenticating species origin of the stingless bee (Trigona collina) was developed. Initially, amplified fragment length polymorphism analysis was made of 11 stingless bee species using 64 primer combinations. A 316-bp band found only in T. collina was cloned and sequenced. A primer pair (CUTc1-F/R) was designed and tested for species-specificity in ... more

M. Theeraapisakkun; S. Klinbunga; S. Sittipraneed
06/30/2020
Amazônia; Bayesian inference; PCR-RFLP; Stingless bees

Bees are important pollinating agents and are an integral part of food production and plant maintenance. It is useful to investigate mitochondrial polymorphisms in bees to obtain information that may be relevant to conservation strategies. We examined mitochondrial haplotypes and evaluated genetic diversity and differentiation in the native stingless bees ... more

L. Ronqui; S.A. Santos; S.A. Santos; C.A. Mangolin; V.A.A. Toledo; M.C.C. Ruvolo-Takasusuki