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Mostrando ítems 11-20 de 1879
Breeding and parental behaviour in the glass frog Centrolene savagei (Anura: Centrolenidae)
(Taylor and Francis Ltd., 2014)
We examine factors that influence male mating success in the glass frog Centrolene savagei; in addition, we describe courtship behaviour, oviposition and early parental behaviour. Fieldwork was conducted in the Colombian ...
Endocrine responsiveness to social challenges in northern and southern hemisphere populations of Zonotrichia
(Springer, 2007)
Northern populations of the White-crowned
Sparrow, Zonotrichia leucophrys, show varying degrees of
social modulation of testosterone. In general, males of midlatitude
breeding and multiple-brooded populations show
transient ...
Mate guarding and territorial aggression vary with breeding synchrony in golden whistlers (Pachycephala pectoralis)
(SPRINGER, 2008-06)
Male paternity assurance behaviour during the
female fertile period has been widely documented amongst
birds. In contrast, how sex-specific behavioural strategies
vary with local breeding synchrony levels remains ...
Mating behavior in two sympatric species of andean tiger beetles (Cicindelidae).
(2011-10-06)
The tiger beetle genus Pseudoxycheila (Cicindelidae) currently contains 21 species, distributed in mid and high elevations in the Andes from Bolivia to Venezuela and in mountains in Panama and Costa Rica. The center of ...
Differences in optical properties of males and females pupae of Anastrepha fraterculus (Diptera: Tephritidae).
(Universidad del ValleColombia, 2021-02-03)
One alternative to pesticide-based control of important fruit fly (Tephritidae) species is the sterile insect technique (SIT). SIT is based on mass releases of sterile males (subjected to radiation) to control a given pest ...
Sexual differences in the toxicity of procaine in rats
(1961)
The toxicity of procaine has been found to be markedly different in the male and female albino rat. The convulsant dose-50 of procaine, injected intraperitoneally (i.p.), was significantly higher in the male rat. It decreased ...
Residual and sub-lethal effects of an attracticide formulation on Choristoneura rosaceana (Harris), Pandemis pyrusana Kearfott, and Cydia pomonella (L.) males (Lepidoptera : Tortricidae)
(ELSEVIER SCI LTD, 2005-07)
A bioassay was developed to evaluate effects on Choristoneura rosaceana (Harris), Pandemis pyrusana Kearfott, and Cydia pomonella (L.), males exposed to an attracticide loaded with 6% permethrin and aged under field ...
Claves para identificar los males del tomate
(El Mercurio, 1980)