Now showing items 1-10 of 417
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 ...
Activity budget patterns in family-group and solitary territorial male guanacos
(Sociedad de Biología de Chile, 2004)
Seasonal effects of density on territory occupation by males of the satyrine butterfly Paryphthimoides phronius (Butler 1867)
(Springer TokyoTokyoJapão, 2009)
Size-Dependent Selective Mechanisms on Males and Females and the Evolution of Sexual Size Dimorphism in Frogs
(Univ Chicago Press, 2014-12-01)
Sexual size dimorphism (SSD) varies in animals from male biased to female biased. The evolution of SSD is potentially influenced by a number of factors, such as territoriality, fecundity, and temporal breeding patterns ...
Male and female golden whistlers respond differently to static and dynamic signals of male intruders
(OXFORD UNIV PRESS INC, 2008-09)
Bird displays vary widely in their sensitivity to changes in signaler condition. Plumage ornaments are generally static and undergo minimal change. Behavioral ornaments, by contrast, are dynamic and may track signaler ...
Resource defense polygyny shifts to female defense polygyny over the course of the reproductive season of a Neotropical harvestman
Although studies classify the polygynous mating system of a given species into female defense polygyny (FDP) or resource defense polygyny (RDP), the boundary between these two categories is often slight. Males of some ...
No size or density effect on alternative mate-locating tactics in the tropical damselfly Hetaerina rosea males (Odonata: Calopterygidae)
(Revista De Biologia TropicalSan JoseCosta Rica, 2009)
The mesosomal gland of Xylocopa frontalis (Hymenoptera, Apidae, Xylocopini)
Males of Xylocopa fimbriata and X. micans present mesosomal glands that produce secretions containing many volatile substances with an intense floral fragrance, which resembles the fragrance produced by flowers that are ...
Vigilance behaviour of the year-round territorial vicuña (Vicugna vicugna) outside the breeding season: Influence of group size, social factors and distance to a water source
(Elsevier Science, 2015-04)
We conducted focal observations of vicuña, a year-around territorial mammal, to compare vigilance behaviour between territorial and bachelor males outside the reproductive season. We hypothesized that the time spent vigilant ...