By looking at curly merino sheep wool, scientists from New Zealand and Japan have discovered that the hair cells lining the outside of the curl are long orthocortical cells while the cells on the inside of the curl are another type paracortical cells , which are short, making the hair bend to give it a curl. Temperature, growth rate, and body size in ectotherms: Ecology and evolution of sympatric sticklebacks Gasterosteus: Ecology and Evolution , 7: The geographic distribution of the major clades supports recently developed hypotheses about the river history of East Asia and further suggests that a range expansion of the northern clade in late Miocene 15 MYA led to the colonisation of Europe by three already distinct genera. The same procedure was followed when analyzing the limnetic and benthic fish. A review of the evidence.
Just as importantly though is that despite a relatively strong body of literature concerning freshwater drum biology and growth in Lake Erie Bur , , Edsall , French and Bur , Griswold and Tubb , the upper midwest Butler and Smith , Moen , Priegel , Wahl et al. Pelagic forms are most laterally compressed, whereas the benthic forms are often extremely dorso ventrally compressed depressed , often with large upward-pointing mouths. The sex-specificity of the liver molecular response suggests that identical hepatic stress could impact these various molecular processes differently, potentially inducing dissimilar biological repercussions in the organisms of two sexes. Detection of sexual dimor- phism in Eurasian perch as an example. Factors influencing sexual size dimorphism in temperate water striders.
Significant differences in body. Quarterly Review of Biology , 64 , — Vespertilionidae from south Brazil" PDF. As shown in Fig.
While both sexes use the trophic apparatus for feeding and indirectly in respiration, male stickleback use their jaws differently from females during the breeding season. Different color patterns have different degrees of conspicuousness on different backgrounds, and may appear differently to predators and mates with differing visual abilities. Kinematic differences do not always map closely to morphological measurements of manipulated excursions made on cleared and stained specimens, but our mixed-model approach indicates that morphological jaw protrusion is a significant predictor of that individual's maximum jaw protrusion during a strike. Bergmann's rule states that the body size of a widely distributed animal clade increases with latitude. Fish were fed ad libitum with freeze-dried chironomid larvae. Geographic size variation in birds and its relationship to climate.