Weasels - Internet Center for Wildlife Damage Management
... small rodents (Fig. 4). Their diet consists of whatever meat they can obtain and may include birds and bird eggs. As predators, they play an important role in the ecosystem. Predators tend to hunt the most abundant prey, turning to another species if the numbers of the first prey become scarce. In t ...
... small rodents (Fig. 4). Their diet consists of whatever meat they can obtain and may include birds and bird eggs. As predators, they play an important role in the ecosystem. Predators tend to hunt the most abundant prey, turning to another species if the numbers of the first prey become scarce. In t ...
Caterpillars escape predation in habitat and thermal refuges
... was maintained at the assigned experimental temperature for approximately 24 h, at which point we recorded the number of ants in each of the deli containers. For this experiment, we only used one F. lasioides colony because it had the largest number of active workers. We used different caterpillar i ...
... was maintained at the assigned experimental temperature for approximately 24 h, at which point we recorded the number of ants in each of the deli containers. For this experiment, we only used one F. lasioides colony because it had the largest number of active workers. We used different caterpillar i ...
Canadian Journal of Fisheries and Aquatic Sciences
... (2016) present evidence for strong size structuring of trophic interactions in a minimally perturbed coral reef fish community: trophic position scaled positively with size both within and across species, and individual abundance declined consistently with size. In addition, the size spectra of two d ...
... (2016) present evidence for strong size structuring of trophic interactions in a minimally perturbed coral reef fish community: trophic position scaled positively with size both within and across species, and individual abundance declined consistently with size. In addition, the size spectra of two d ...
Common Clownfish Amphiprion ocellaris
... the death of the coral—this destroys critical reef habitats where anemones would usually be found, and therefore causes a dilemma for clownfish. An additional effect of rising temperatures is the strain it puts on clownfish reproduction. Clownfish will only reproduce if the water is within a fairly ...
... the death of the coral—this destroys critical reef habitats where anemones would usually be found, and therefore causes a dilemma for clownfish. An additional effect of rising temperatures is the strain it puts on clownfish reproduction. Clownfish will only reproduce if the water is within a fairly ...
Intraspecific Morphological Variation in Two Common Marine Fish
... marine systems is that it is assumed that there are fewer barriers to gene flow than in freshwater systems [31, 32]. Without physical barriers to gene flow there is less opportunity for local adaptation to occur which could result in more homogenous populations. Another reason intraspecific morpholo ...
... marine systems is that it is assumed that there are fewer barriers to gene flow than in freshwater systems [31, 32]. Without physical barriers to gene flow there is less opportunity for local adaptation to occur which could result in more homogenous populations. Another reason intraspecific morpholo ...
Lecture 14. Chiroptera II
... powered flight like other Eocene bats, but ear morphology suggests that it lacked their echolocation abilities, supporting ...
... powered flight like other Eocene bats, but ear morphology suggests that it lacked their echolocation abilities, supporting ...
Beluga Whale (Delphinapterus leucas)
... birth every 2-4 years. Conservation Status: Near Threatened (Cook Inlet population – Critically Endangered) Threats: The largest threat to beluga whale populations is due to human impact which includes competition with fisheries, oil and gas development, offshore drilling, pollution and climate chan ...
... birth every 2-4 years. Conservation Status: Near Threatened (Cook Inlet population – Critically Endangered) Threats: The largest threat to beluga whale populations is due to human impact which includes competition with fisheries, oil and gas development, offshore drilling, pollution and climate chan ...
Some Characteristics of the Phylum Cnidaria
... meadows in between: the reefs protect the mangroves and seagrass from strong currents and waves that would damage them or erode the sediments in which they are rooted, while the mangroves and seagrass protect the coral from large influxes of silt, fresh water and pollutants. This additional level of ...
... meadows in between: the reefs protect the mangroves and seagrass from strong currents and waves that would damage them or erode the sediments in which they are rooted, while the mangroves and seagrass protect the coral from large influxes of silt, fresh water and pollutants. This additional level of ...
The Phylum Cnidaria
... 4. Jellyfish fact: The worlds largest known jellyfish can reach a diameter of 2.5 m/ 8ft and their tentacles can grow to be half the length of a football field. 5. Jellyfish fact: Jellyfishes uses jet propulsion to make their way through to oceans of the world. Some swim while others mostly drifts w ...
... 4. Jellyfish fact: The worlds largest known jellyfish can reach a diameter of 2.5 m/ 8ft and their tentacles can grow to be half the length of a football field. 5. Jellyfish fact: Jellyfishes uses jet propulsion to make their way through to oceans of the world. Some swim while others mostly drifts w ...
Document
... Obtained by interacting with the environment and cannot be passed on to the next generation except by teaching. ...
... Obtained by interacting with the environment and cannot be passed on to the next generation except by teaching. ...
Basic Freshwater Baits-
... BASIC FRESHWATER BAITS There are many different baits available to make it easy for everyone to get in on the fun of freshwater fishing. These include commercial baits bought from tackle and bait shops, baits that you can find in your yard, and baits that you can make from natural materials. Let’s l ...
... BASIC FRESHWATER BAITS There are many different baits available to make it easy for everyone to get in on the fun of freshwater fishing. These include commercial baits bought from tackle and bait shops, baits that you can find in your yard, and baits that you can make from natural materials. Let’s l ...
biotic interactions alter top-down pressure on a leaf
... guppy presence beyond reductions in abundance of P. hansoni larvae by evaluating differences in larval size structure. Growth of aquatic macroinvertebrates is an important process to understand within the framework of a stream ecosystem. Holometabolous aquatic insects, such as caddisflies, undergo c ...
... guppy presence beyond reductions in abundance of P. hansoni larvae by evaluating differences in larval size structure. Growth of aquatic macroinvertebrates is an important process to understand within the framework of a stream ecosystem. Holometabolous aquatic insects, such as caddisflies, undergo c ...
Animals
... Animals are eukaryotic, multicellular, and food-ingestive. They use extracellular protein and carbohydrates to bind themselves together as opposed to cell walls of plants. Muscle and nerve provide means for movement. Sexual reproduction involves cleavage of the fertilized egg into a ball of cells - ...
... Animals are eukaryotic, multicellular, and food-ingestive. They use extracellular protein and carbohydrates to bind themselves together as opposed to cell walls of plants. Muscle and nerve provide means for movement. Sexual reproduction involves cleavage of the fertilized egg into a ball of cells - ...
amphibians
... Newts and salamanders have long tails and lizardlike bodies. They feed on slugs, insects, and other small animals. Some species, such as this fire salamander, have poison glands on their heads. ...
... Newts and salamanders have long tails and lizardlike bodies. They feed on slugs, insects, and other small animals. Some species, such as this fire salamander, have poison glands on their heads. ...
Correlates between morphology, diet and foraging mode in the
... results on the diet of the study species coincide in general with previous data (Valverde, 1967; Vericad and Escarré, 1976; Cheylan and Guillaume, 1993). We also observed a high percentage of stationary prey in our species’ diet, suggesting an active foraging strategy (Schoener, 1971), as usual in ...
... results on the diet of the study species coincide in general with previous data (Valverde, 1967; Vericad and Escarré, 1976; Cheylan and Guillaume, 1993). We also observed a high percentage of stationary prey in our species’ diet, suggesting an active foraging strategy (Schoener, 1971), as usual in ...
Shattered: Medawar`s Test Tubes and their Enduring Legacy of Chaos
... does not occur in most biological populations. What needs to be done at this point to resolve these issues is to imagine how famine, drought, disease/parasites, accidents/natural disasters, and predation acting alone will affect the age distribution of a non-aging, biological population. By adding t ...
... does not occur in most biological populations. What needs to be done at this point to resolve these issues is to imagine how famine, drought, disease/parasites, accidents/natural disasters, and predation acting alone will affect the age distribution of a non-aging, biological population. By adding t ...
Evolution in Natural Populations Evolution in Natural
... • Even starting with a genetically homogeneous population, artificial selection still works, but it takes longer. • Why? • Mackay et al (1994) selected on abdominal bristle number in a highly inbred line of Drosophila (=extremely low in genetic variability). • Over 120 generations the high and low l ...
... • Even starting with a genetically homogeneous population, artificial selection still works, but it takes longer. • Why? • Mackay et al (1994) selected on abdominal bristle number in a highly inbred line of Drosophila (=extremely low in genetic variability). • Over 120 generations the high and low l ...
In the Wild - The Maryland Zoo in Baltimore
... o Grab prey with their teeth and wrap coils of their body around the prey and squeeze – do not crush the prey and break bones but rather squeeze tightly so that the prey cannot breathe and suffocates o Can unhinge their jaw to swallow the prey whole utilizing rhythmic muscular contractions that pull ...
... o Grab prey with their teeth and wrap coils of their body around the prey and squeeze – do not crush the prey and break bones but rather squeeze tightly so that the prey cannot breathe and suffocates o Can unhinge their jaw to swallow the prey whole utilizing rhythmic muscular contractions that pull ...
Why amphibians breathe through their skin
... 9. How are amphibian frog larvae different from the adult frogs? 10. Where do caelilians live? 11. Why do many amphibians need to have moist skin? ...
... 9. How are amphibian frog larvae different from the adult frogs? 10. Where do caelilians live? 11. Why do many amphibians need to have moist skin? ...
Combining molecular gut content analysis and functional
... hypothesized that (i) feeding interactions of centipedes are driven by predator-prey body-size ratios ...
... hypothesized that (i) feeding interactions of centipedes are driven by predator-prey body-size ratios ...
Cnidarian and Ctenophore ppt
... Cnidarians: Structure and Function • Oral surface and aboral surface • Central mouth with tentacles • Mouth open into a gut (only one opening) • Capture prey with nematocysts (stinging structures found within tentacles) – When cells are touched, water pressure causes nematocysts to protrude ...
... Cnidarians: Structure and Function • Oral surface and aboral surface • Central mouth with tentacles • Mouth open into a gut (only one opening) • Capture prey with nematocysts (stinging structures found within tentacles) – When cells are touched, water pressure causes nematocysts to protrude ...
Communities IV Energy FLow
... 2. Relative resilience - how quickly the altered system returns to its original state B. Food chain complexity and stability 1. Hypothesis #1 the more possible ways that energy can flow through a food web, the more stable the system will be (MacArthur) 2. Hypothesis #2 Too many paths and links in fo ...
... 2. Relative resilience - how quickly the altered system returns to its original state B. Food chain complexity and stability 1. Hypothesis #1 the more possible ways that energy can flow through a food web, the more stable the system will be (MacArthur) 2. Hypothesis #2 Too many paths and links in fo ...
Schreckstoff
In 1938, the Austrian ethologist Karl von Frisch made his first report on the existence of the chemical alarm signal known as Schreckstoff (startle/shock matter) in minnows. An alarm signal is a response produced by an individual, the “sender”, reacting to a hazard that warns other animals, the receivers, of danger. This chemical alarm signal is only released when the sender incurs mechanical damage, such as when it has been caught by a predator, and is detected by the olfactory system. When this signal reaches the receivers, they perceive a greater predation risk and exhibit an antipredator response. Since populations of fish exhibiting this trait survive more successfully, the trait is maintained via natural selection. While the evolution of this signal was once a topic of great debate, recent evidence suggests schreckstoff evolved as a defense against environmental stressors such as pathogens, parasites, and UVB radiation and that it was later co-opted by predators and prey as a chemical signal.