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Crawfish

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by

Jordan Lane

on 30 January 2014

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Transcript of Crawfish

Crawfish
Crawfish are freshwater crustaceans resembling small lobsters, to which they are related.
water mite
Water Mites are close relatives of spiders. Like spiders, they have eight legs and soft bodies.
backswimmer
Backswimmers are slender, oval, streamlined water bugs that swim with long, oarlike hind legs that have fine hairs.
Predaceous diving beetle
Diving beetles are oval and flat and range in length from 1.5 mm to more than 35 mm (0.06 to more than 1.4 inches). They are well adapted to an aquatic environment.
Stonefly
Adults are rather soft bodied, elongate, and have two pairs of wings which may be highly pigmented and are folded over the back when at rest. The hind wing is quite wide and is folded fan-like over the back.
gilled snail
Prosobranch snails have a long incurrent siphon (tube) that draws water into the mantle (the tissue connecting the body to the shell), where gills extract oxygen. Thus they are able to “breathe” underwater much like a clam. Another key characteristic of prosobranch snails is the operculum, a hard, horny, rounded “trapdoor” attached to the foot that seals the opening when the animal retracts into the shell.
Taxonomy
Kingdom:Animalia

Phylum:Arthropods

Class:Crustacean

Order:Decapods

Family:Cambaridae

Genus:Cambarus

Species:bartonii
Taxonomy
KINGDOM; Animal
PHYLUM: Arthropod
CLASS: Arachnid
ORDER: Acarina
FAMILY: Arrenuridae
GENUS: Arrenurus
SPECIES: Arrenurus (many species)
Taxonomy
Kingdom: Animalia (Animals)
Phylum: Arthropoda (Arthropods)
Class: Insecta (Insects)
Order: Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Family: Notonectidae (Backswimmers)
Taxonomy
Kingdom: Animalia (Animals)
Phylum: Arthropoda (Arthropods)
Class: Insecta (Insects)
Order: Coleoptera (Beetles)
Family: Dytiscidae (Predaceous Diving Beetles)
Taxonomy
Kingdom: Animalia (Animals)
Phylum: Arthropoda (Arthropods)
Class: Insecta (Insects)
Order: Plecoptera (Stoneflies)
Genus: Capnia
Taxonomy
Kingdom: Animalia
Phylum: Mollusca
Order: Prosobranchia
Class: Gastropada
Location
Location
Location
Location
Location
Location
Rivers and brooks are the main living habitat for the crayfish due to their water clarity and thin ice conditions. Humans will rarely see crayfish during the day but if you shine a flashlight in the water at dark its a whole different story.
Water Mites live in marshes, ponds, and lakes. They like shallow, still water with lots of plants.
Backswimmers are found in still and slow-flowing ponds, rice fields, canals and rivers. Although they spend most of their time in water they have the ability to fly from pond to pond.
Predaceous diving beetles are most commonly found in slow moving bodies of water such as streams, marshes, pools, small lakes, and ponds.
Stoneflies can be found along the edges of streams on vegetation or attracted to lights. Adult daily (diurnal) activity patterns vary with species. Some are active at night and may be found at lights.
This particular snail clings to rocks in cold or cool moving freshwater.
Feeding
How it eats: Clings to rocks and uses its radula or "rasping tongue" to scrape
What it eats: Algae and plant material
Predators: Many larger animals
Food web: Herbivore
How it eats: Gathering collector
What it eats: Crayfish feed on living and dead animals and plants.
Predators: Frogs, turtles, raccoons, otters, minks, humans, and wading birds
Food web: Omnivore
Feeding
Feeding
How it eats: A water-mite cannot chew his food. When he attacks an insect larva or some other animal, the mite sucks the juices out of its body, much as a spider sucks the body fluids out of a fly.
What it eats: small insects, aquatic worms, and other mites (even their own kind)
Predators: Hydras, insects, and small fish
Food web: Carnivore
Feeding
How it eats:Backswimmers swim on their backs, vigorously paddling with their long, hair-fringed hind legs and attack prey.
What it eats: Small crustaceans
Predators: Other insect predators
Food web: Carnivore
Feeding
How it eats: When hunting, they cling to grasses or pieces of wood along the bottom, and hold perfectly still until prey passes by, then they lunge, trapping their soon-to-be-food between their front legs and biting down with its pincers.
What it eats: tadpoles and glassworms, among dozens of other smaller water-dwelling creatures.
Predators: Reptiles, amphibians, fish, wading birds, raccoons, and skunks
Food web: Carnivore
Feeding
How it eats: Shred with strong claws
What it eats: Leaves and plant material
Predators: Trout, many other fish, and frogs
Food web: Herbivore
Activity
Crawfish may be found in wet meadows or shallow water. They spend the day in burrows that can be identified by "chimneys" made of mud balls piled high from digging the burrow. They may burrow down 6 or 7 feet to reach water during dry spells. They are active at night.
Activity
Most water mites crawl about on submerged plants or on the muddy or sandy bottom of quiet pools. They must surface for air.
Activity
When resting, backswimmers hang head-downward from the surface of the water, or they hold onto plant stems with their front legs. They must come to the surface for a new supply of air. The bubble of air, carried beneath their wings and on the lower side of their body, appears as a silver film. They have a beak that can inflict a painful bite.
Activity
Adult diving beeles often hang head down. Only the tip of the abdomen is above the surface of the water. The larvae are called "water tigers." The adults use their hind legs as oars when swimming.
Activity
Activity
Snails glide slowly, on their muscular foot, over the surfaces of all objects beneath the water.
The flattened stonefly nymphs cling to rocks with two strong claws. The adults hide among leaves of shrubs close to the water. Some species require two or three years to mature.
Environmental Factors
Environmental Factors
Crawfish are somewhat sensitive to pollution. About half of the 330 known species are endangered or at risk. The majority of crawfish eaten by humans are grown in farm ponds in Louisiana. If eaten, they must be cooked thoroughly because they are sometimes a host for a lung fluke that is a parasite in humans.
Some biologists feel that water mites are valuable as a control for mosquitoes. A mosquito that is host to several mites will not feed, and without blood the mosquito cannot reproduce.
Environmental Factors
Adult predaceous diving beetles are active dispersers and are important predators in isolated aquatic habitats.
Environmental Factors
It has been found that ponds and wetlands have a higher diversity of organisms which is often related to nutrient and food resources. Temperature can also affect the distribution of backswimmers. Scientific study has shown that the backswimmer is capable of surviving over a wide range of temperatures and conditions.
Environmental Factors
Gilled snails are less tolerant to pollution than others. The shells of gilled snails usually open on the right where an operculum covers the opening. Lung-breathing snails, also called pouch snails, are pollution-tolerant.
Environmental Factors
Stoneflies are sensitive to pollution. Their presence indicates clean water and high levels of oxygen. When they are not getting enough oxygen, they do "push-ups" to push more water across their gills.
Interesting Fact
Interesting Fact
Interesting Fact
Interesting Fact
Interesting Fact
Interesting Fact
There is a species that is blue. It is called a Blue Crayfish. There are also red and white crayfish.
Like all mites, Water Mites are close relatives of spiders. Like spiders, they have eight legs and soft bodies.
Although larval diving beetles have gills, the adults do not. Instead, adults breathe underwater by bringing a small bubble of air with them when they dive.
Some species can fertilize their own eggs, change gender, and/or cross fertilize.
Some species can even live in temporary streams; when the streams dry out, they can temporarily suspend body growth and development, slowing down their metabolism in order to survive until moisture is restored.
Backswimmers have a very painful bite and are sometimes called water bees because of the reaction that occurs.
Water Quality Issue
The water is littered by humans and it's sickening the organisms inhabiting the pond.
Synopsis
Once one of the organisms becomes addicted to the taste of the litter, his newfound friends plot a plan to rid him of his addiction because they care for him and he is extremely sensitive to pollution. They fear he will die. They do so and everyone lives happily ever after in the pond.
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