A trade-off between growth and starvation endurance in a pit
... tested whether antlions that grew faster during the feeding phase lost more mass during the successive starvation phase compared to those that had lower growth rates during the feeding phase. When two successive measurements are taken on the same individuals, they tend, on average, to be closer to t ...
... tested whether antlions that grew faster during the feeding phase lost more mass during the successive starvation phase compared to those that had lower growth rates during the feeding phase. When two successive measurements are taken on the same individuals, they tend, on average, to be closer to t ...
The Ecological Role of the Mammalian Mesocarnivore
... Simple ecological communities represent systems in which the community effects of mesocarnivores may be more prominent because interactions in these communities may be linear, strong, and lacking compensation. That is, communities are more often simple rather than complex, resulting in linear food c ...
... Simple ecological communities represent systems in which the community effects of mesocarnivores may be more prominent because interactions in these communities may be linear, strong, and lacking compensation. That is, communities are more often simple rather than complex, resulting in linear food c ...
The Ecological Role of the Mammalian Mesocarnivore
... Simple ecological communities represent systems in which the community effects of mesocarnivores may be more prominent because interactions in these communities may be linear, strong, and lacking compensation. That is, communities are more often simple rather than complex, resulting in linear food c ...
... Simple ecological communities represent systems in which the community effects of mesocarnivores may be more prominent because interactions in these communities may be linear, strong, and lacking compensation. That is, communities are more often simple rather than complex, resulting in linear food c ...
Fact sheet on the giant willow aphid
... qualitative; 1 increase in photosynthetic rate, 2 increase in leaf N, 3 increase in tree water use, 4 reduction in shoot and root biomass, 5 reduction in growth in the following year. ...
... qualitative; 1 increase in photosynthetic rate, 2 increase in leaf N, 3 increase in tree water use, 4 reduction in shoot and root biomass, 5 reduction in growth in the following year. ...
Small bugs with a big impact: linking plankton ecology with
... for extrapolating our understanding of plankton ecology to predicting large-scale features and processes? The behavior and physiology of individual planktonic organisms are adapted to the environment in which plankton live and their microscopic size places constraints on their biology. These adaptat ...
... for extrapolating our understanding of plankton ecology to predicting large-scale features and processes? The behavior and physiology of individual planktonic organisms are adapted to the environment in which plankton live and their microscopic size places constraints on their biology. These adaptat ...
Dow, R. 1942a. The relation between prey and sex in the cicada
... cicada killers at two locations in north Florida where a variety of cicada species, with a large range in body size, are used as prey. We captured, measured, and marked samples of male and female wasps, and we measured and identified paralyzed cicadas that we retrieved from females as they were prov ...
... cicada killers at two locations in north Florida where a variety of cicada species, with a large range in body size, are used as prey. We captured, measured, and marked samples of male and female wasps, and we measured and identified paralyzed cicadas that we retrieved from females as they were prov ...
Social and landscape effects on food webs: a
... [9] for pitcher plants and [10] for beetles). In butterfly associated metacommunities, van Nouhuys and Hanski [8] present the competition/dispersal trade-off and several other multi-species interactions linking the community and the landscape level. For pitcher plant metacommunities, it was shown ho ...
... [9] for pitcher plants and [10] for beetles). In butterfly associated metacommunities, van Nouhuys and Hanski [8] present the competition/dispersal trade-off and several other multi-species interactions linking the community and the landscape level. For pitcher plant metacommunities, it was shown ho ...
Herbivory
... terrestrial ecosystems have just three trophic levels Plants generally limited by resource availability (not by herbivores) Herbivores generally limited by their predators and parasites Carnivores generally food-limited, since their predators are rare or absent Any system with an odd number ...
... terrestrial ecosystems have just three trophic levels Plants generally limited by resource availability (not by herbivores) Herbivores generally limited by their predators and parasites Carnivores generally food-limited, since their predators are rare or absent Any system with an odd number ...
GEco0416Herbnew
... terrestrial ecosystems have just three trophic levels Plants generally limited by resource availability (not by herbivores) Herbivores generally limited by their predators and parasites Carnivores generally food-limited, since their predators are rare or absent Any system with an odd number ...
... terrestrial ecosystems have just three trophic levels Plants generally limited by resource availability (not by herbivores) Herbivores generally limited by their predators and parasites Carnivores generally food-limited, since their predators are rare or absent Any system with an odd number ...
Herbivory
... terrestrial ecosystems have just three trophic levels Plants generally limited by resource availability (not by herbivores) Herbivores generally limited by their predators and parasites Carnivores generally food-limited, since their predators are rare or absent Any system with an odd number ...
... terrestrial ecosystems have just three trophic levels Plants generally limited by resource availability (not by herbivores) Herbivores generally limited by their predators and parasites Carnivores generally food-limited, since their predators are rare or absent Any system with an odd number ...
The impact of climate change on antarctic
... to reproduce and are therefore vulnerable to climate changes that increase the variability of their population growth rate. Most of them rank high in the marine food chains and feed on Antarctic krill, their staple food. Except for the cetaceans, which are fully aquatic, all other Antarctic megafaun ...
... to reproduce and are therefore vulnerable to climate changes that increase the variability of their population growth rate. Most of them rank high in the marine food chains and feed on Antarctic krill, their staple food. Except for the cetaceans, which are fully aquatic, all other Antarctic megafaun ...
The effect of extrinsic mortality on genome size evolution in
... Mortality has a significant role in prokaryotic ecology and evolution, yet the impact of variations in extrinsic mortality on prokaryotic genome evolution has received little attention. We used both mathematical and agent-based models to reveal how variations in extrinsic mortality affect prokaryoti ...
... Mortality has a significant role in prokaryotic ecology and evolution, yet the impact of variations in extrinsic mortality on prokaryotic genome evolution has received little attention. We used both mathematical and agent-based models to reveal how variations in extrinsic mortality affect prokaryoti ...
Heart Rate in Spiders - University of Missouri
... Although there was no significant difference (P > .05) in body weights of large (230 to 630 mg) web weavers and hunters, the former group had significantly greater (P < .001; Student's t-test) heart rates (Fig. 2). Both types of female spiders use silk on some occasions during their lives (for examp ...
... Although there was no significant difference (P > .05) in body weights of large (230 to 630 mg) web weavers and hunters, the former group had significantly greater (P < .001; Student's t-test) heart rates (Fig. 2). Both types of female spiders use silk on some occasions during their lives (for examp ...
Palaeontology Key Stages 3 and 4
... Start off by finding out as much as you can about your area of interest. Books are the main traditional source for finding out information, but the internet is quickly becoming an important way to find out current information. Newspapers and magazines like New Scientist and Nature can also give you ...
... Start off by finding out as much as you can about your area of interest. Books are the main traditional source for finding out information, but the internet is quickly becoming an important way to find out current information. Newspapers and magazines like New Scientist and Nature can also give you ...
Predation environment predicts divergent life-history
... Costa Rican livebearing fish Brachyrhaphis rhabdophora. Populations that co-occurred with piscine predators attained maturity at a smaller size, and produced more, smaller offspring relative to populations from predator-free environments. These differences persisted over 3 years and between wet and ...
... Costa Rican livebearing fish Brachyrhaphis rhabdophora. Populations that co-occurred with piscine predators attained maturity at a smaller size, and produced more, smaller offspring relative to populations from predator-free environments. These differences persisted over 3 years and between wet and ...
... untested. Here, a detailed study of bird species in Arizona and Argentina shows that Skutch’s hypothesis explains clutch size variation within North and South America. However, neither Skutch’s hypothesis nor two major alternatives explain differences between latitudes. The dependent young of parent ...
NotesChapter7
... A metapopulation is made up of a number of spatially separated, extinction-prone local populations (or subpopulations) that are linked by migration (Groombridge 1992, Barbault & Sastrapradja 1995, Wikipedia Contributors 2006b). It may be described as a “population of populations” with two levels of ...
... A metapopulation is made up of a number of spatially separated, extinction-prone local populations (or subpopulations) that are linked by migration (Groombridge 1992, Barbault & Sastrapradja 1995, Wikipedia Contributors 2006b). It may be described as a “population of populations” with two levels of ...
melanistic cetaceans - Orca Research Trust
... Newcomer et al. 1996). Our record of melanistic southern right-whale dolphins off New Zealand is the first from these waters. What makes it particularly interesting is that multiple anomalously pigmented individuals were within the same group, including a melanistic calf accompanying a melanistic ad ...
... Newcomer et al. 1996). Our record of melanistic southern right-whale dolphins off New Zealand is the first from these waters. What makes it particularly interesting is that multiple anomalously pigmented individuals were within the same group, including a melanistic calf accompanying a melanistic ad ...
Chapter 30: Mammals
... almost constantly in order to fuel their metabolisms. Trophic categories Mammalogists divide mammals into four trophic categories based on what they eat: 1. Insectivores, such as moles and shrews, eat insects and other small invertebrates. 2. Herbivores, such as rabbits and deer, feed on vegetation. ...
... almost constantly in order to fuel their metabolisms. Trophic categories Mammalogists divide mammals into four trophic categories based on what they eat: 1. Insectivores, such as moles and shrews, eat insects and other small invertebrates. 2. Herbivores, such as rabbits and deer, feed on vegetation. ...
Populational status of the endangered mollusc Patella ferruginea
... The densities of P. ferruginea Gmelin, 1791 found in Western Habibas and Plane Islands, 4.8 individuals per lineal metre (ind/m) and 22 ind/m respectively, are among the highest in the Mediterranean. Data available in the literature indicate 0.79 (ind/m) of linear transect in Corsica (Laborel–Deguen ...
... The densities of P. ferruginea Gmelin, 1791 found in Western Habibas and Plane Islands, 4.8 individuals per lineal metre (ind/m) and 22 ind/m respectively, are among the highest in the Mediterranean. Data available in the literature indicate 0.79 (ind/m) of linear transect in Corsica (Laborel–Deguen ...
Impact of fouling organisms on mussel rope culture
... water. Frechette et al. (1989) found a significant reduction in phytoplankton concentration in the boundary layer close to intertidal beds of blue mussels Mytilus edulis (L.), while Wildish & Kristmanson (1984) found similar results for both blue mussels and northern horse mussels Modiolus modiolus. ...
... water. Frechette et al. (1989) found a significant reduction in phytoplankton concentration in the boundary layer close to intertidal beds of blue mussels Mytilus edulis (L.), while Wildish & Kristmanson (1984) found similar results for both blue mussels and northern horse mussels Modiolus modiolus. ...
size-selective harvesting alters life histories of a temperate sex
... Abstract. Selective mortality, whether caused naturally by predation or through the influence of harvest practices, initiates changes within populations when individuals possessing certain heritable traits have increased fitness. Theory predicts that increased mortality rates will select for changes i ...
... Abstract. Selective mortality, whether caused naturally by predation or through the influence of harvest practices, initiates changes within populations when individuals possessing certain heritable traits have increased fitness. Theory predicts that increased mortality rates will select for changes i ...
Zoology Foldables CH 32-1 Introduction To The Mammals
... INSIDE: the duckbill platypus, & two species of spiny anteaters, or echidnas. OUTSIDE: Australia… INSIDE: is the only continent on which you can find a wild mammal with a cloaca! Foldable #4 OUTSIDE: Marsupials INSIDE: mammals that bear live young that usually complete their development in an extern ...
... INSIDE: the duckbill platypus, & two species of spiny anteaters, or echidnas. OUTSIDE: Australia… INSIDE: is the only continent on which you can find a wild mammal with a cloaca! Foldable #4 OUTSIDE: Marsupials INSIDE: mammals that bear live young that usually complete their development in an extern ...
Methods for dietary studies on marine mammals
... A number of important decisions must be made about prey identification: for instance should only fresh prey be considered? should all hard parts be identified? and so on. Thus, to avoid errors due to digestive erosion and loss of material, one strategy is to identify only “fresh” remains. In practic ...
... A number of important decisions must be made about prey identification: for instance should only fresh prey be considered? should all hard parts be identified? and so on. Thus, to avoid errors due to digestive erosion and loss of material, one strategy is to identify only “fresh” remains. In practic ...
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.