Now showing items 21-30 of 40404
Burrow ornamentation in the fiddler crab (Uca leptodactyla): female mate choice and male–male competition
Non-biological ornamentation is found in the nests and burrows of different kinds of animals. We evaluated here whether sand hoods constructed by male fiddler crabs (Uca leptodactyla) are one of the signals used by males ...
Breeding activity of the neotropical treefrog Hyla elegans (Anura, Hylidae)
Breeding of Hyla elegans was monitored from August 1991 to July 1992 at a temporary pond in Ubatuba, State of Sao Paulo, southeastern Brazil. Males began to call as they entered the chorus, and defended their calling sites ...
Fertility of male adult rats submitted to forced swimming stress
(Associação Brasileira de Divulgação Científica (ABRADIC), 2003-05-01)
We investigated whether stress interferes with fertility during adulthood. Male Wistar rats (weighing 220 g in the beginning of the experiment) were forced to swim for 3 min in water at 32ºC daily for 15 days. Stress was ...
SYSTEMIC LUPUS-ERYTHEMATOSUS IN 18 BRAZILIAN MALES - CLINICAL AND LABORATORY ANALYSIS
(Royal Belg Rheumatol SocPellenbergBélgica, 1993)
Copulatory dialogue: female spiders sing during copulation to influence male genitalic movements
(Animal Behaviour, 2006, 72, 413-421, 2006)
Female behaviour during copulation that could function as communication with the male is probably more common than previously appreciated, but its functional significance remains little studied. Stridulation during copulation ...
Primary cutaneous histoplasmosis developed in the penis of an immunocompetent patient
A 70-year-old male presenting a 3-month history of genital painless erythematous nodules in the balanopreputial sulcus was referred to our service. Histopathological exam presented a chronic dermatitis with epithelioid ...
Alternative mating tactics in dimorphic males of the harvestman Longiperna concolor (Arachnida: Opiliones)
Intense male-male competition for females may drive the evolution of male morphological dimorphism, which is frequently associated with alternative mating tactics. Using modern techniques for the detection of discontinuous ...