ECOLOGY: The relationship between organisms and their
... In more stable environments where K is reached and maintained, a species would be selected to maximize fitness by being more competitive and efficient in its environment, since resources are limited. We call these K-selected species. ...
... In more stable environments where K is reached and maintained, a species would be selected to maximize fitness by being more competitive and efficient in its environment, since resources are limited. We call these K-selected species. ...
BRITISH COLUMBIA SOCIETY FOR THE PREVENTION
... The BC SPCA is opposed to the capture, confinement and breeding of marine mammals for entertainment or educational display. Institutions, facilities and businesses that currently house marine mammals must aim to provide the animals with the Five Freedoms and meet the highest professional accreditati ...
... The BC SPCA is opposed to the capture, confinement and breeding of marine mammals for entertainment or educational display. Institutions, facilities and businesses that currently house marine mammals must aim to provide the animals with the Five Freedoms and meet the highest professional accreditati ...
R and K selection
... straight line implys equal mortality with respect to age (type II) semelparity – organisms with one reproductive cycle during its life time. ...
... straight line implys equal mortality with respect to age (type II) semelparity – organisms with one reproductive cycle during its life time. ...
ch 5-6 test and core
... ____ 19. As resources in a population become less available, the population a. declines rapidly. c. reaches carrying capacity. b. increases slowly. d. enters a phase of exponential growth. ____ 20. When the exponential phase of a logistic growth curve of a population ceases, a. the size of the popu ...
... ____ 19. As resources in a population become less available, the population a. declines rapidly. c. reaches carrying capacity. b. increases slowly. d. enters a phase of exponential growth. ____ 20. When the exponential phase of a logistic growth curve of a population ceases, a. the size of the popu ...
The Auk
... Abstract.—Passerine birds on islands tend to have larger bills than their mainland relatives. The morphological shift may be related to reduced interspecific and increased intraspecific competition. Emberizid sparrows in North American salt marshes also show consistently greater bill size. We tested ...
... Abstract.—Passerine birds on islands tend to have larger bills than their mainland relatives. The morphological shift may be related to reduced interspecific and increased intraspecific competition. Emberizid sparrows in North American salt marshes also show consistently greater bill size. We tested ...
Chap. 3 Extinction
... Fig. 3.1 Population growth and animal extinctions. (left) Geometric increase in the human population.(right) increasing numbers of extinctions in birds and mammals. 生態學 2003 Chap.3 Extinction ...
... Fig. 3.1 Population growth and animal extinctions. (left) Geometric increase in the human population.(right) increasing numbers of extinctions in birds and mammals. 生態學 2003 Chap.3 Extinction ...
Early Human Behavior
... so-called nuclear family in human evolution. Instead, a renewed look at archaeological records and observations of a contemporary hunting and gathering tribe in East Africa suggest the key roles in nourishing the evolution of people's ancestors may have been played by females — mothers and grandmoth ...
... so-called nuclear family in human evolution. Instead, a renewed look at archaeological records and observations of a contemporary hunting and gathering tribe in East Africa suggest the key roles in nourishing the evolution of people's ancestors may have been played by females — mothers and grandmoth ...
MAMMAL FACT SHEET What are Mammals?
... ecological niches for medium and large sized herbivores and carnivores were occupied by these ancient reptiles. The early mammals remained small. Many became successful insectivores. They avoided large carnivores by maintaining a nocturnal lifestyle and hiding in burrows and crevices during the day. ...
... ecological niches for medium and large sized herbivores and carnivores were occupied by these ancient reptiles. The early mammals remained small. Many became successful insectivores. They avoided large carnivores by maintaining a nocturnal lifestyle and hiding in burrows and crevices during the day. ...
File
... the bottom-up control hypothesis. The size of a herbivore population (higher trophic level) is determined by how much food they consume or the quality of the food source (lower trophic level). Although some bottom-down controls are still believed to exist, the size of predatorprey populations are pr ...
... the bottom-up control hypothesis. The size of a herbivore population (higher trophic level) is determined by how much food they consume or the quality of the food source (lower trophic level). Although some bottom-down controls are still believed to exist, the size of predatorprey populations are pr ...
III. Exponential growth
... living world. B. Species diversity is the # of different species in biosphere; increases moving towards equator. C. Genetic diversity is the sum total of all the different forms of genetic information carried by all ...
... living world. B. Species diversity is the # of different species in biosphere; increases moving towards equator. C. Genetic diversity is the sum total of all the different forms of genetic information carried by all ...
Populations & Population Growth
... reproducing. • Other species are successful by being very good at surviving. • Some are equally mediocre at these two things. • These differences contribute to very different life history patterns for different species. ...
... reproducing. • Other species are successful by being very good at surviving. • Some are equally mediocre at these two things. • These differences contribute to very different life history patterns for different species. ...
3 slides/page - USD Home Pages
... uterus via a large placenta via which the mother supplies food and oxygen and removes waste products. • Pregnancy is relatively long and the young are fairly welldeveloped at birth. ...
... uterus via a large placenta via which the mother supplies food and oxygen and removes waste products. • Pregnancy is relatively long and the young are fairly welldeveloped at birth. ...
PDF
... gave birth to much smaller offspring than do similar-sized mammals [7,11]. This occurred because, whereas mammals of larger size give birth to offspring of ever-increasing size, dinosaur egg size could not have increased indefinitely. Larger eggs need to be protected by thicker eggshells, but the eg ...
... gave birth to much smaller offspring than do similar-sized mammals [7,11]. This occurred because, whereas mammals of larger size give birth to offspring of ever-increasing size, dinosaur egg size could not have increased indefinitely. Larger eggs need to be protected by thicker eggshells, but the eg ...
Extinction
... Stable isotope ratios in fossil shells -Isotopes of an element vary in number of neutrons, but have a fixed number of ...
... Stable isotope ratios in fossil shells -Isotopes of an element vary in number of neutrons, but have a fixed number of ...
Northwest Alaska Climate Change Effects Table The table below
... The table below outlines some of the possible effects of climate change in Northwest Alaska. These effects are drawn from model data, expert observations, and the existing literature, and will be one of our primary references during the upcoming workshop, so please take some time to read through thi ...
... The table below outlines some of the possible effects of climate change in Northwest Alaska. These effects are drawn from model data, expert observations, and the existing literature, and will be one of our primary references during the upcoming workshop, so please take some time to read through thi ...
Biology - Riverside Military Academy
... 2. Infer whether species diversity increases or decreases after a fire on a grassland. Explain your response. 3. Explain why the concepts of limiting factors and tolerance are important in ecology. 4. Describe how successsional stages would differ from primary succesion. 5. In December 2004, a huge ...
... 2. Infer whether species diversity increases or decreases after a fire on a grassland. Explain your response. 3. Explain why the concepts of limiting factors and tolerance are important in ecology. 4. Describe how successsional stages would differ from primary succesion. 5. In December 2004, a huge ...
The Persistent Progression: an Alternative View on Animal Evolution
... and on the mature globe a new phase of plate-tectonic shifting of the existing continents started instead. Around and on the stable established continents, biological evolution could gain continuity and momentum. This has been probably impossible in the times of the “peristable” Archean micro-contin ...
... and on the mature globe a new phase of plate-tectonic shifting of the existing continents started instead. Around and on the stable established continents, biological evolution could gain continuity and momentum. This has been probably impossible in the times of the “peristable” Archean micro-contin ...
Bergmann`s rule and the mammal fauna of northern North America
... advantage of some trait other than body mass but with which mass is coupled, or 2) of random colonisation of certain areas by large-bodied ancestral species followed by subsequent clade diversification. The remaining four hypotheses for Bergmann’s rule can be considered biological. The dispersal hyp ...
... advantage of some trait other than body mass but with which mass is coupled, or 2) of random colonisation of certain areas by large-bodied ancestral species followed by subsequent clade diversification. The remaining four hypotheses for Bergmann’s rule can be considered biological. The dispersal hyp ...
The Real Great Dinosaur Extinction
... growth, and this one was the most significant surge so far. It was prompted primarily by several developments in medicine and public health, which reduced mortality and prolonged life, and the global human population reached 2.5 billion. In the next 36 years, the global population doubled. A last su ...
... growth, and this one was the most significant surge so far. It was prompted primarily by several developments in medicine and public health, which reduced mortality and prolonged life, and the global human population reached 2.5 billion. In the next 36 years, the global population doubled. A last su ...
Consulta: subjectFacets:"Clutch size" Registros recuperados: 7 Data
... authors have demonstrated that the estimated clutch size may be affected by the inclusion or exclusion of dead neonates or non-developed eggs. The reproductive system of 254 mature females newly arrived from nature was examined and 29.55% (n=75) had eggs in the oviducts in different stages of embryo ...
... authors have demonstrated that the estimated clutch size may be affected by the inclusion or exclusion of dead neonates or non-developed eggs. The reproductive system of 254 mature females newly arrived from nature was examined and 29.55% (n=75) had eggs in the oviducts in different stages of embryo ...
chapter 34 - Biology Junction
... All of the 30 or so species of hagfishes are marine scavengers, feeding on worms and sick or dead fish. Rows of slime glands along a hagfish’s body produce small amounts of slime perhaps to repulse other scavengers or larger amounts to deter a potential predator. Vertebrate systematists do not ...
... All of the 30 or so species of hagfishes are marine scavengers, feeding on worms and sick or dead fish. Rows of slime glands along a hagfish’s body produce small amounts of slime perhaps to repulse other scavengers or larger amounts to deter a potential predator. Vertebrate systematists do not ...
Time to model all life on Earth - Department of Mathematics and
... Earth.) Yet certain computational techniques have been developed, mainly in marine ecology, that could allow researchers to model entire ecosystems using rules about the behaviour of individuals. One approach is to model collections of organisms or ‘cohorts’. The idea is that within a cohort, indivi ...
... Earth.) Yet certain computational techniques have been developed, mainly in marine ecology, that could allow researchers to model entire ecosystems using rules about the behaviour of individuals. One approach is to model collections of organisms or ‘cohorts’. The idea is that within a cohort, indivi ...
Powerpoint
... relationships. Allometric relationships with body mass are often the consequence of adaptation ...
... relationships. Allometric relationships with body mass are often the consequence of adaptation ...
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.