Hydro-labs can be used to find profiles in bodies of water. Hydro-labs are equipped to determine depth, by utilizing hydrostatic pressure allows us to create thermal, oxygen, and depth profiles for lentic water bodies
Hydro lab parameters
Dissolved O2 (mg/L & %), Temp (°C), Conductivity (µ/S), pH, Depth (m), Turbidity (NTU), and Total Dissolved Solids (g/L).
three different methods to control biomass of aquatic plants
Biological methods (grass carp), mechanical (dredging, and cutting), chemical (herbicides)
back calculation length sat age equation
What two families of fish are pharyngeal teeth useful for identifying to species?
Cyprinidae and Catostomidae
How are the gill rakers in gizzard shad modified?
Filamentous packed close together, used to strain water for phytoplankton/zooplankton from water
gas filled chamber detects
compressions from the outside environment.
LMB, BLG, CHCT, BLCT, FLTHDCT, primary type of forage
largemouth bass would be considered a piscivore, a bluegill an invertivore, and channel catfishes are considered omnivorous, but blue and flathead catfishes are piscivorous
What is the purpose of collecting fish from a pond by seining, setting passive traps and electrofishing all within the same short term sample period?
The idea is to get a representative sample of the relative abundances of all size and age classes of fish within the pond.
why are we are pulling otoliths from the largemouth bass that we collected
To find age classes. It is important to know the age and size structure of fish populations in ponds
What types of information can otoliths provide us and why are scales not used in our region?
Age, growth rates, habitat stress, stress from reproduction, length of growing season
Other two methods
Fraiser lee method Weisburg method
Want to see the other 12 Flashcards in Lab practical 2?JOIN TODAY FOR FREE!