Cytologist_an_endgered_species-BAC_13-09
... – By then he had exceeded 10,000 hours of computer programming in previous 7 years ...
... – By then he had exceeded 10,000 hours of computer programming in previous 7 years ...
Bacterial colonization and extinction on marine aggregates
... well the abundance and dynamics of the entire community on the aggregate in terms of density-dependent growth rates, detachment and permanent attachment, and predation from higher trophic levels (Kiørboe et al. 2002, 2003; Kiørboe 2003), given the large number of individuals in the entire community. ...
... well the abundance and dynamics of the entire community on the aggregate in terms of density-dependent growth rates, detachment and permanent attachment, and predation from higher trophic levels (Kiørboe et al. 2002, 2003; Kiørboe 2003), given the large number of individuals in the entire community. ...
PREDATORS, INVISIBLE PREY, AND THE NATURE OF
... the rations required from l-2 hr, depending on the seasonal abundance of the prey species. After the fish had quictcd in the dark, the light was turned on for at least 1 hr bcforc the prey were introduced. This gave the fish some time to acclimate to the light source which they acknowledged by swimm ...
... the rations required from l-2 hr, depending on the seasonal abundance of the prey species. After the fish had quictcd in the dark, the light was turned on for at least 1 hr bcforc the prey were introduced. This gave the fish some time to acclimate to the light source which they acknowledged by swimm ...
Historical biogeography of the Isthmus of Panama
... continents until about 10 Ma (Campbell et al., 2010), when the land bridge was briefly nearly complete. During the Neogene, South American sloths evolved into a diversity of slowmoving herbivores, terrestrial and arboreal, with ecological analogues among Madagascar’s giant lemurs which, like most of ...
... continents until about 10 Ma (Campbell et al., 2010), when the land bridge was briefly nearly complete. During the Neogene, South American sloths evolved into a diversity of slowmoving herbivores, terrestrial and arboreal, with ecological analogues among Madagascar’s giant lemurs which, like most of ...
Lazy leapers - Horizon documentation-IRD
... carried over fiom oneleap to the next if it is stored as elastic strain energy: internally, in tendons, or externally, in branches.To date there is no evidence that this occurs in large saltatory primates (DEMES et al., 1995) and it seems unlikely in most small mammals (BIEWENER et al., 1981) A clue ...
... carried over fiom oneleap to the next if it is stored as elastic strain energy: internally, in tendons, or externally, in branches.To date there is no evidence that this occurs in large saltatory primates (DEMES et al., 1995) and it seems unlikely in most small mammals (BIEWENER et al., 1981) A clue ...
Ecogeographical Variation in Skull Shape of South
... hypothesis that climate and competition might have a direct impact on species morphological variation at broad geographical scale. South-American canids represent a recent radiation due to their late Pliocene colonization from a restricted pool of North American taxa (Berta 1987; Prevosti 2010; Peri ...
... hypothesis that climate and competition might have a direct impact on species morphological variation at broad geographical scale. South-American canids represent a recent radiation due to their late Pliocene colonization from a restricted pool of North American taxa (Berta 1987; Prevosti 2010; Peri ...
The Extinction of the Glaucus Macaw
... flying heads. These massive heads support enormous bills that are specially designed to quickly open the incredibly hard nuts of palms. This specialization and incredible ability has not come free, as both Hyacinth and Lear's Macaws are both dependent on these palms for their survival in the wild. I ...
... flying heads. These massive heads support enormous bills that are specially designed to quickly open the incredibly hard nuts of palms. This specialization and incredible ability has not come free, as both Hyacinth and Lear's Macaws are both dependent on these palms for their survival in the wild. I ...
BCB 311 Biodiversity & Conservation Biology
... They first appeared on the earth during the Devonian Period 360-408 million years ago This was because the Devonian Period which was known as the Age of fishes, allowed for the amphibian to evolve, owing to the fact that Labefinned fishes are believed to be ancestral to the amphibians The Carb ...
... They first appeared on the earth during the Devonian Period 360-408 million years ago This was because the Devonian Period which was known as the Age of fishes, allowed for the amphibian to evolve, owing to the fact that Labefinned fishes are believed to be ancestral to the amphibians The Carb ...
Ward et al. - Massachusetts Institute of Technology
... includes explicit complexation with an organic ligand, scavenging by particles, and representation of aeolian and sedimentary sources (Dutkiewicz et al. 2012). Complex ecosystem models often require a large number of uncertain empirical parameters to describe the interactions between state variables ...
... includes explicit complexation with an organic ligand, scavenging by particles, and representation of aeolian and sedimentary sources (Dutkiewicz et al. 2012). Complex ecosystem models often require a large number of uncertain empirical parameters to describe the interactions between state variables ...
Fulltext PDF
... Changes in the size and positions of the continents also had a deep impact on the world's climate, which in turn, significantly affected primate evolution. Global cooling and increased glaciation in the Oligocene caused the mid and high latitude vegetation to change from broadleaf evergreen rainfore ...
... Changes in the size and positions of the continents also had a deep impact on the world's climate, which in turn, significantly affected primate evolution. Global cooling and increased glaciation in the Oligocene caused the mid and high latitude vegetation to change from broadleaf evergreen rainfore ...
Understanding the demographic mechanisms underlying effective
... measures such as rates of feather re-growth as indicators of condition in practice is limited because they only apply to the period over which the growth occurred: the impact of short-term physiological stresses might have passed and become irrelevant before the measure is taken. The principal relev ...
... measures such as rates of feather re-growth as indicators of condition in practice is limited because they only apply to the period over which the growth occurred: the impact of short-term physiological stresses might have passed and become irrelevant before the measure is taken. The principal relev ...
Part 1: 7,4 mb - Rhino Resource Center
... forest and semidesert. During the mesozoic era certain reptilian herbivores (the so-called dinosaurs) attained immense body sizes comparable to or even exceeding those ofthe largest whales, although it has been suggested that the largest dinosaurs may have been semi-aquatic in their habits. These re ...
... forest and semidesert. During the mesozoic era certain reptilian herbivores (the so-called dinosaurs) attained immense body sizes comparable to or even exceeding those ofthe largest whales, although it has been suggested that the largest dinosaurs may have been semi-aquatic in their habits. These re ...
How will climate change affect moose
... How will climate change affect moose? It’s a big question with no clear cut answers. There are three variables affected by climate change which in turn, will affect moose. These are increasing temperatures and two additional consequences of those increases; changes in forest species, and increasing ...
... How will climate change affect moose? It’s a big question with no clear cut answers. There are three variables affected by climate change which in turn, will affect moose. These are increasing temperatures and two additional consequences of those increases; changes in forest species, and increasing ...
Modeling nutrient transport and transformation by pool
... We measured the wet masses each year of a sub-sample of the breeding adults (~140 individuals of each sex) in the laboratory and emergent juveniles (~100) in the field using an electronic balance. To estimate dry mass from wet mass, a subset of eggs and juveniles collected in 2012 were oven-dried to ...
... We measured the wet masses each year of a sub-sample of the breeding adults (~140 individuals of each sex) in the laboratory and emergent juveniles (~100) in the field using an electronic balance. To estimate dry mass from wet mass, a subset of eggs and juveniles collected in 2012 were oven-dried to ...
Parasite Abundance and Color-Biased Predation of Fiddler Crabs
... size was controlled, to account for the significant interaction between claw size and claw color, redness of the claw was still significantly negatively correlated with predation. Carapace size was also not correlated with predation rates. A possible explanation is that there are other red, harmful ...
... size was controlled, to account for the significant interaction between claw size and claw color, redness of the claw was still significantly negatively correlated with predation. Carapace size was also not correlated with predation rates. A possible explanation is that there are other red, harmful ...
Environmental Fitness for Sustained Population Dynamics
... Genetic algorithms are often used as machine learning tools, and have proved to be good random search optimizers. Their learning bias is usually mainly determined by a fitness function. This approach performs particularly well for some class of problems, and is not appropriate for others. This study ...
... Genetic algorithms are often used as machine learning tools, and have proved to be good random search optimizers. Their learning bias is usually mainly determined by a fitness function. This approach performs particularly well for some class of problems, and is not appropriate for others. This study ...
Procambarus clarkii
... and males have in chela size and cephalothorax size, whether or not males exhibit the larger chela size, and what effects these differences have on relations and interactions among male and females. We focused on these two factors, chela size and cephalothorax size, and we conducted our experimentat ...
... and males have in chela size and cephalothorax size, whether or not males exhibit the larger chela size, and what effects these differences have on relations and interactions among male and females. We focused on these two factors, chela size and cephalothorax size, and we conducted our experimentat ...
Andrew D. Barnes , Rowan M. Emberson , Hazel M. Chapman
... habitat edges have pervasive impacts on the distribution and persistence of invertebrates1. Land use change is of particular concern in African tropical montane forests as populations are increasing dramatically throughout these areas. Therefore , this study focuses on the impacts of livestock and f ...
... habitat edges have pervasive impacts on the distribution and persistence of invertebrates1. Land use change is of particular concern in African tropical montane forests as populations are increasing dramatically throughout these areas. Therefore , this study focuses on the impacts of livestock and f ...
The spatial distribution of African savannah herbivores
... smaller-bodied herbviores [26]. On the other hand, competition for browse may have negative impacts, and it is unclear when positive or negative interactions will dominate (figure 1). Predators can have significant top-down influences both through direct consumption of herbivore prey and also throug ...
... smaller-bodied herbviores [26]. On the other hand, competition for browse may have negative impacts, and it is unclear when positive or negative interactions will dominate (figure 1). Predators can have significant top-down influences both through direct consumption of herbivore prey and also throug ...
Coping with Changing Northern Environments: The Role of the Stress... Birds and Mammals R B
... and homeostatic control (Matthews, 2002). There is also an interplay between changes in the HPA axis and the reproductive axis, which will ultimately translate in to changes in adult fitness. Third, experience may alter the HPA axis response. This axis functions well when the stressor is of short du ...
... and homeostatic control (Matthews, 2002). There is also an interplay between changes in the HPA axis and the reproductive axis, which will ultimately translate in to changes in adult fitness. Third, experience may alter the HPA axis response. This axis functions well when the stressor is of short du ...
Journal of Herpetology
... If the plotted data yields a straight line using semilog paper, a Gompertz curve can be used to describe the observed data pattern (Kaufmann, 1981). If a straight line is obtained using logarithmic paper, then a potency curve must be used and, if a straight line is obtained with linear graph paper, ...
... If the plotted data yields a straight line using semilog paper, a Gompertz curve can be used to describe the observed data pattern (Kaufmann, 1981). If a straight line is obtained using logarithmic paper, then a potency curve must be used and, if a straight line is obtained with linear graph paper, ...
The origin of higher taxa: macroevolutionary processes, and the
... different types of cell and are associated with several very disparate morphological structures such as sensory and autonomic nerves, branchial arches and their derivatives, and the pigmented layer of the skin (e.g. Wolpert et al. 2002). The empirical evidence that the developmental regulatory syste ...
... different types of cell and are associated with several very disparate morphological structures such as sensory and autonomic nerves, branchial arches and their derivatives, and the pigmented layer of the skin (e.g. Wolpert et al. 2002). The empirical evidence that the developmental regulatory syste ...
Volume 4 Number 1 May 2009 - Flinders University Palaeontology
... (cretateous/tertiary) mass extinction event as being the likely cause for mammalian evolutionary expansion, mostly through niche filling following the demise of non-avian dinosaurs and associated reptiles. What the analysis has shown is that the majority of mammalian families originated around 85MA, ...
... (cretateous/tertiary) mass extinction event as being the likely cause for mammalian evolutionary expansion, mostly through niche filling following the demise of non-avian dinosaurs and associated reptiles. What the analysis has shown is that the majority of mammalian families originated around 85MA, ...
DENSITY AND SIZE CLASS DISTRIBUTION OF YELLOW
... indicated that no slider turtles were present (Lewis 1946), suggesting the turtles likely colonized at some point after the golf course wetlands were created. Thus, although density at BHI is currently very high, further monitoring is needed to observe long-term changes to this population. Density o ...
... indicated that no slider turtles were present (Lewis 1946), suggesting the turtles likely colonized at some point after the golf course wetlands were created. Thus, although density at BHI is currently very high, further monitoring is needed to observe long-term changes to this population. Density o ...
Megafauna
In terrestrial zoology, megafauna (Ancient Greek megas ""large"" + New Latin fauna ""animal"") are large or giant animals. The most common thresholds used are 45 kilograms (100 lb) or 100 kilograms (220 lb). This thus includes many species not popularly thought of as overly large, such as white-tailed deer, red kangaroo, and humans.In practice, the most common usage encountered in academic and popular writing describes land animals roughly larger than a human that are not (solely) domesticated. The term is especially associated with the Pleistocene megafauna – the land animals often larger than modern counterparts considered archetypical of the last ice age, such as mammoths, the majority of which in northern Eurasia, the Americas and Australia became extinct as recently as 10,000–40,000 years ago. It is also commonly used for the largest extant wild land animals, especially elephants, giraffes, hippopotamuses, rhinoceroses, and large bovines. Megafauna may be subcategorized by their trophic position into megaherbivores (e.g., elk), megacarnivores (e.g., lions), and, more rarely, megaomnivores (e.g., bears).Other common uses are for giant aquatic species, especially whales, any larger wild or domesticated land animals such as larger antelope and cattle, as well as numerous dinosaurs and other extinct giant reptilians.The term is also sometimes applied to animals (usually extinct) of great size relative to a more common or surviving type of the animal, for example the 1 m (3 ft) dragonflies of the Carboniferous period.