ARE THEY THE SAME OR NOT?
Arthropod Lab
John Labador
04-09-14
Mitcham-PAPBio-2nd
Objective
-Look for similarities between 2 arthropods
-Look for differences between 2 arthropods
Background Information (Grasshoppers)
Background Information (Crayfish)
Respiratory System (grasshopper)
Respiratory System (crayfish)
The Crayfish a very unique way of breathing. The gills of the crayfish are located on the outside of the body between the crayfish body wall and carapace. If you were to detach one of the crayfishes walking legs, you would observe that the crayfish's gill is attached to its walking leg. The crayfish's gills are attached to the walking legs, so as it walks, it can breath.
A crayfish has a pocket where water is stored. The water is stored so the crayfish can walk on land and still breath. A crayfish has to have water in order to breath.
As the crayfish walks, the surface area of the gills spread so the water can pass through in order for the crayfish to breath.
Other Information
Cited Informations
http://crescentok.com/staff/jaskew/isr/biology/biolab46b.htm
http://comparativeanatomybiology.weebly.com/grasshopper-anatomy.html
http://bioweb.uwlax.edu/bio210/s2012/carr_alec/classification.htm
http://www.fcps.edu/islandcreekes/ecology/crayfish_(cambarus).htm
http://evolution.berkeley.edu/evolibrary/news/121201_grasshoppers
Taxonomy
Taxonomy
Evolution (grasshoppers)
The researchers focused on the grasshopper species Chorthippus biguttulus. To attract females, male grasshoppers rub their hind legs over a vein on their wings, producing a buzzing call that females use to locate and select their mates.
Evolution (crayfish)
Ecology (grasshoppers)
Habitat: Grass and Low Plants
Predators: Birds and Lizards
Prey: Plants
Trophic Level: Herbivores
Ecology (crayfish)
Habitat: Fresh Water
Predators: Racoon and Owls
Prey: Earthworm
Trophic Level: Carnivores
Body System (grasshopper)
Thorax: The body section after the head, with the legs and wings attached. There are three sections of the thorax: the prothorax, the mesothorax, and the metathorax.
Abdomen: The posterior section of the body containing the reproductive and digestive organs.
Spiracles: Breathing pores.
Coxa: The section of a leg that is attached to the body.
Trochanter: The second segment of a leg, between the coxa and the femur.
Femur: The third segment of a leg, between the trochanter and the tibia. (Grasshoppers and other jumping insects have enlarged hind femora with powerful muscles).
Tibia: The fourth segment of a leg, between the femur and the tarsus.
Tarsus: The leg segment after the tibia, often subdivided into several sections.
Genitalia: The sexual organs.
Wings: Outgrowths of the body wall that enable insects to fly. The first pair of wings is sometimes modified into a protective covering for the hind wings.
Body System (crayfish)
Internal anatomy of a crayfish: edible freshwater crustacean, with pincers on the two forelegs.
Encephalon: site of the mental functions of a crayfish.
Stomach: part of the digestive tract between the esophagus and the intestine.
Heart: blood-pumping organ of the crayfish.
Gonad: sex gland of a crayfish.
Extensor muscles: muscle that extends the tail of the crayfish.
Anus: outlet of the digestive tract.
Flexor muscle: muscle that bends the tail of the crayfish.
Digestive gland: glandular organ that produces digestive enzymes.
Ganglion of ventral nerve cord: budge related to a collection of nerves of the abdomen of a crayfish.
Ventral nerve cord: collection of nerves in the abdomen of a crayfish.
Maxilliped: pair of appendages of a crayfish used for holding prey.
Esophagus: part of the digestive tract between the mouth and the stomach.
Mandible: lower jaw.
Mouth: entrance to the digestive tract.
Green gland: antennary gland.
Eye: sight organ of a crayfish
Human Influence (grasshopper)
Human Influence (crayfish)
Crayfish are a popular animal for children to catch, and often the first "dangerous" animal they come into contact with. Only very large crayfish can do any damage, but even a smaller crayfish's pinch can hurt, so kids learn how to be careful picking them up.
Many people eat crayfish. They are also used by fisherman as bait.
Crayfish help humans in other ways, such as cleaning up dead animal and plant matter from the bottom of streams, and by controlling populations of insects and other animals