نتایج جستجو برای: geckos
تعداد نتایج: 642 فیلتر نتایج به سال:
Animals are exposed to different visual stimuli that influence how they perceive and interact with their environment. Visual information such as shape colour can help animals detect, discriminate, make appropriate behavioural decisions for mate selection, communication, camouflage, foraging. Previous research indicates at least some species within all major vertebrate groups prefer discriminate...
Many lizard species will shed their tail as a defensive response (e.g., to escape a putative predator or aggressive conspecific). This caudal autotomy incurs a number of costs as a result of loss of the tail itself, loss of resources (i.e., stored in the tail or due to the cost of regeneration), and altered behavior. Few studies have examined the metabolic costs of caudal autotomy. A previous s...
Cell size plays a role in evolutionary and phenotypically plastic changes in body size. To examine this role, we measured the sizes of seven cell types of geckos (Paroedura picta) reared at three constant temperatures (24, 27, and 30°C). Our results show that the cell size varies according to the body size, sex and developmental temperature, but the pattern of this variance depends on the cell ...
The Hajar Mountains of south-eastern Arabia form an isolated massif surrounded by the sea to the east and by a large desert to the west. As a result of their old geological origin, geographical isolation, complex topography and local climate, these mountains provide an important refuge for endemic and relict species of plants and animals. With 19 species restricted to the Hajar Mountains, repti...
By using adhesion, geckos can move through incredibly challenging habitats. However, continually changing terrain may necessitate modulation of the adhesive apparatus in order to maximize its effectiveness over a range of challenges. Behaviorally modulating how the adhesive system is applied can occur by altering the alignment of the foot relative to the long axis of the body and/or the angles ...
ABSTRACT Amongst tetrapods, mechanoreceptors on the feet establish a sense of body placement and help to facilitate posture biomechanics. Mechanoreceptors are necessary for stabilizing while navigating through changing terrains or responding sudden change in mass orientation. Lizards such as leopard gecko (Eublepharis macularius) employ autotomy – voluntary detachment portion tail escape predat...
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