Buscar
Mostrando ítems 31-40 de 103
Ultrastructure of Deinopis egg sac (Araneae: Deinopidae)
(2014)
Attacks by predators and parasitoids on spider eggs are common. To counteract their negative effect, spiders have evolved a series of behaviours and features related to their egg sacs. In the genus Deinopis (Deinopidae) ...
Morphological adaptations for relatively larger brains in hummingbird skulls
(2018)
A common allometric pattern called Haller’s Rule states that small species have relatively larger brains and eyes than larger species of the same taxonomic group. This
pattern imposes drastic structural changes and ...
The effect of conspecific density, herbivory, and bamboo on seedling dynamics of a dominant oak in a Neotropical highland forest
(2019-10-17)
Conspecific negative density dependence (CNDD) is one of the main mechanisms
influencing diversity maintenance in tropical forests. Tropical highland forests, in
contrast to most lowland forests, are commonly dominated ...
Feeding effectiveness of Megaphobema mesomelas (Araneae, Theraphosidae) on two prey types
(2012)
Prey selection is essential for individual fitness; therefore, it would be expected that a predator would select prey of a higher rank (energy/time) when exposed to prey of differing quality. In this paper, we compare the ...
Asociación entre la morfología alar y el uso del hábitat en seis especies de palomas (Columbidae) neotropicales
Relationship between wing morphology and habitat use in six species of Neotropical doves (Columbidae).
(2019)
Biomechanics, behavior, and natural history influence wing dimension and shape. Wing design often correlates with features of the habitat in which each species is found. Doves and pigeons (Columbidae family) range from ...
The roles of history and habitat area in the distribution and composition of avian species assemblages in the highlands of Costa Rica
(2011)
Bird species assemblages in isolated Neotropical highland mountains have been moulded by the drastic climatic changes that occurred in late Pleistocene. Palynological evidence indicates that after the Pleistocene the ...
Comparación del peso de diferentes tipos de plumas entre cinco especies de aves del páramo de Chirripó, Costa Rica
(1993)
Plumage weight was compared in highland and wide-range bird species (N= 18 weight samples): Sooty Robín (Tutdus nigresce/lS). Rufous-collared Sparrow (Zonotrichia cape/lSís), Volcano Junco (íunco vulcani), Slaty Flowerpiercer ...
Courtship, egg sac construction, and maternal care in Kukulcania hibernalis, with information on the courtship of Misionella mendensis (Araneae, Filistatidae)
(2013)
Morphological and behavioural traits place Filistatidae basally within Araneomorphae, although some features, such as their continuing to moult after reaching adulthood, are reminiscent of mygalomorph spiders. This paper ...
Spiders hanging out in the rain
(2021-03-12)
Behavioural adjustments to changing environmental conditions are advantageous for spiders, as such adjustments likely allow spiders to remain in good hunting sites. Here, we describe the behavioural response of seven ...