|
|
|
|
|
| Sperber,Carlos F.; Vieira,Gustavo H.; Mendes,Moisés H.. |
| Amostram-se grilos de serapilheira com armadilhas enterradas (pitfall). No entanto, algumas espécies são sub-amostradas, por que alguns indivíduos conseguem fugir da armadilha. Neste trabalho sugerimos a substituição da solução aquosa de detergente, por uma solução de formol-glicerina-álcool, para aumentar a eficiência da amostragem. Testamos se: (i) formol reduz a fuga de grilos; (ii) formol é repelente para os grilos. Foram instaladas 80 armadilhas, formando pares formol-detergente e detergente-detergente, com 20 cm entre armadilhas dentro do par, e 3 m entre pares. Foram coletados 105 indivíduos, sendo 29 adultos, de nove espécies, em três grupos taxonômicos: Phalangopsinae, Trigonidiinae e Brachytrupinae. Tanto o número de adultos quanto de ninfas... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Metodologia; Armadilha enterrada; Inventário; Ecologia; Comportamento de locomoção. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000400030 |
| |
|
|
| Lopes-Andrade,Cristiano; Gumier-Costa,Fabiano; Sperber,Carlos F.. |
| Most male ciids present a fovea in the first urosternite. We tested two alternative hypotheses for the function of male abdominal fovea in Xylographus contractus Mellié: (i) the fovea secretes sexual pheromone, and (ii) the fovea secretes aggregation pheromone. For this, 59 specimens were submitted, separately, to two stimuli (fovea extracts and control) in an y-shaped glass olfactometer. For the analyses, we considered the 47 individuals that moved toward one of the longer olfactometer branches. The probability of moving toward the fovea extract was greater for females than for males (chi2 = 3.94, P = 0.047). The proportion of males that moved toward any of the olfactometer branches was the same (chi2 = 0.29, P = 0.59). We concluded that the male's... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycetobiont beetle; Copulatory courtship; Tangoreceptor. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000200005 |
| |
|
| |
|
| |
|
|
| Collevatti,Rosane G.; Sperber,Carlos F.. |
| Baccharis dracunculifolia, the host plant of the gall maker Neopelma baccharidis Burck., is locally distributed in delimited patches. The effects of the host plant individual (plant height, crown diameter, and crown volume), local (host plant patch), and regional (locality) characteristics on the number of galls were analyzed, in Viçosa (three patches) and in Rio Doce State Park, Marliéria (two patches), Minas Gerais State (20°45'S, 42°50'W; and 19°50'S, 42°30'W, respectively). The number of galls/individual plant increased homogenousliy with plant dimensions on local and regional scale. Gall load was also homogenous, but the proportion of galled plants differed on a local scale. The differences were related to local plant size differences, and not to host... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Galls; Parque Estadual do Rio Doce; Herbivory; Plant architecture. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591997000100006 |
| |
|
|
|
