Now showing items 1-10 of 21758
Polyisoprenylated benzophenones from Clusia floral resins
(Pergamon-elsevier Science LtdOxfordInglaterra, 2000)
Competitive males have higher quality sperm in a monogamous social bee
(BioMed Central, 2016)
Abstract Background Reproductive success is determined by the interplay between mating and fertilization success. In social insect species with male-biased sex ratios and ...
Infertility of autoimmune origin in a stallion.
Exocrine glands of Schwarziana quadripunctata (Hymenoptera, Apinae, Meliponini)
This article describes the location, anatomy, histology and ontogeny of adult Schwarziana quadripunctata exocrine glands. These glands appear either as individualized organs (salivary gland system and Dufour gland) or as ...
Does the male reproductive performance depend on the early lactation milk in rats?
This study investigated the role of the early lactation milk (ELM) on the male reproductive performance and the participation of GnRH on this effect in Wistar rats. Newborn males were divided into three experimental groups: ...
Male Breast Cancer.
Trade-offs in male display activity with lek size
In lek mating systems, males aggregate and defend arenas where they display for females; females select and mate with a male and then solely raise their offspring. Generally, female visits and copulations increase and ...
Males of Neotropical social wasps (Vespidae, Polistinae, Epiponini) recognize colonies with virgin females
(Pensoft Publ, 2014-01-01)
Male behavior of Neotropical swarm-founding wasps has rarely been observed. The few published observations about male activities only describe their behavior during the short period they spend inside nests. In consequence, ...
Territoriality and male-biased sexual size dimorphism in Argia reclusa (Odonata: Zygoptera)
(SPRINGER HEIDELBERGHEIDELBERG, 2012)
In Odonata, many species present sexual size dimorphism (SSD), which can be associated with male territoriality in Zygoptera. We hypothesized that in the territorial damselfly Argia reclusa, male-male competition can favor ...