PPT-Crayfish Study

Crayfish Study Scenario We are Biological Technicians for National Park Service at Lake Roosevelt National Recreation Area Part of our job is to help with the Crayfish Inventory and Monitoring Program For this study our duties will be to set and take in the crayfish traps as well as collecting and analyzing the data. S Geological Survey wwwpaseagrantorg The rusty crayfish is an aggressive crayfish with a huge appetite It has not only managed to outcompete native crayfish species but has also devastated aquatic ecosystems in several states including Pennsylvania A ) and identification. Crayfish. Crayfish. Phylum: . Arthropoda. Subphlum. : . Crustacea. Class: Malacostraca. Order: . Decapoda. Crayfish. Order: . Decapoda. Families: . Parastacidae. (South America & Australia). BILL OF FARE Bar Snacks PLATTERS Male . vs. Female Grasshopper. Grasshopper Anatomy. Male . vs. Female Crayfish. Crayfish Gills. Our group is researching, “Which . macroinvertebrate. has the most mercury when compared throughout the trophic pyramid?” . Macroinvertebrates. are insects without a backbone that can be seen with the naked eye.  Mercury is an element that can be found in water, air and soil or sediment. There is more than one specific type of mercury like inorganic, organic, elemental, and metallic (metal). Mercury can also give off toxic vapors which is dangerous for the environment because they are clear, odorless, and invisible, so we don’t even know they are evaporating because we can’t see or smell them. Mercury’s chemical symbol is Hg, which comes from the Latin word . Introduction. Crayfish are small, freshwater . arthropods. that resemble lobsters. . They are usually brownish-green in color, but some species may be white, pink, or even blue.. Freshwater crayfish are divided into two family groups.. Crayfish are active mainly at night, hiding by day under stones or in crevices in the riverbank. The white-clawed crayfish was once wi Deleted: ST SY 2 4 8 0 6 4S X 4 2 S S 4 6 0 2 8 6 Rivers Abdomen.  - The abdomen is the segmented tail area. The swimmerets, . telson. , and . uropods. are attached to the abdomen.. Carapace.  - The protective shell (exoskeleton) of the cephalothorax.. Cephalic groove. Brian Helms. 1. and Jim Stoeckel. 2. 1. Department of Biological Sciences. 2. School of Fisheries, Aquaculture, and Aquatic Science. Auburn University, AL 36849. Role of crayfishes in ecosystems. Consumers. Crayfish. FOSS Structures of Life, TESLA Science Notebooks . Big Idea:. All living organisms have identifiable structures . and characteristics . that . serve . different functions in . growth, survival. Evolutionary Perspective. Metamerism modified by tagmatization. Chitinous exoskeleton. Paired, jointed appendages. Ecdysis. Ventral nervous system. Coelom reduced to cavity around gonads. Open circulatory system. McClanahan,T.R. (1997). Predation and the distribution and abundance of tropical sea ur-chin popuIations.Journal of Experimental Marine, Biology and Ecology221: 231-255.McShane P.E. (1997). A summary McClanahanTR 1997 Predation and the distribution and abundance of tropical sea ur-chin popuIationsJournal of Experimental Marine Biology and Ecology221 231-255McShane PE 1997 A summary of commercial c Sarah Schieffer, Nicole Bauer, Brandon . Urhammer. , Sarah Bartholomew . Faculty Mentor: Todd Wellnitz, Biology Department. Percent of Rusty Crayfish. Non . sampled . lakes. 0%. 1-40%. 41-80%. 81-100%.