Buscar
Mostrando ítems 91-100 de 535
The influence of regional and local oceanography in early stages of marine fishes from temperate rocky reefs
(Springer Verlag, 2019)
Nearshore ichthyoplankton assemblages are constantly influenced by the dynamics of coastal environments (i.e. daily thermal gradients and coastal currents), as well as by regional environmental forcing, such as upwelling ...
Summer dynamics of the deep chlorophyll maximum in Lake Tahoe
(1987)
Vertical profiles of chlorophyll and phytoplankton biomass were measured in Lake Tahoe from July 1976 through April 1977. A deep chlorophyll maximum (DCM) persisted during summer and early autumn (July-October) near 100 ...
Phylogeny and systematics [Principles of evolution, ecology and behavior]
(Yale University, Open Yale Courses, 2011)
Phylogeny and systematics [Principles of evolution, ecology and behavior]
(Yale University, Open Yale Courses, 2016)
Greater Growth of Proximal Metatarsals in Bird Embryos and the Evolution of Hallux Position in the Grasping Foot
(John Wiley and Sons Inc., 2017)
© 2016 Wiley Periodicals, Inc. In early theropod dinosaurs—the ancestors of birds—the hallux (digit 1) had an elevated position within the foot and had lost the proximal portion of its metatarsal. It no longer articulated ...
Allonursing in Captive Guanacos, Lama guanicoe: Milk Theft or Misdirected Parental Care?
(2009)
Females in several ungulates transfer milk to non-filial (NF) offspring, in
a process known as allonursing. This behavior is less common in monotocous
species, including most ungulates, and it has been associated ...
Seasonal flexibility of organ mass and intestinal function for the Andean lizard Liolaemus nigroviridis
(2009)
One of the most fundamental questions in organismal ecology is how animals work in a continuously changing environment. In order to contribute to the current understanding of this question, this study evaluated seasonal ...
Heterochrony and Morphological Variation of Epithalamic Asymmetry
(John Wiley and Sons Inc., 2017)
© 2016 Wiley Periodicals, Inc. Heterochrony is one proposed mechanism to explain how morphological variation and novelty arise during evolution. To experimentally approach heterochrony in a comprehensive manner, we must ...
Validation of a radioimmunoassay for measuring fecal cortisol metabolites in the hystricomorph rodent, octodon degus
(2009)
Determination of fecal steroid metabolites is a noninvasive technique that characterizes the physiological state of organisms without the physiological and psychological stress of handling. Although this technique has many ...
Environmental signaling and evolutionary change: Can exposure of pregnant mammals to environmental estrogens lead to epigenetically induced evolutionary changes in embryos?
(2005)
DNA methylation is one of the epigenetic and hereditary mechanisms regulating genetic expression in mammalian cells. In this review, we propose how certain natural agents, through their dietary consumption, could induce ...