Thursday, April 30, 2009

Craig Creek Fish

Group: Jon, Caitlin, Vicki, Blaine, Jessica


Mountain Redbelly Dace
Phoxinus oreas
Found 10 specimens
· Disaligned midlateral stripe
· Blotches










Mottled Sculpin
Cottus bairdi
Found 4 specimens




Color nearly as dark as bands







Rosyside Dace
Clinostomus funduloides
· ­Mismatched scales
· Horseshoe shaped mouth









Bluehead Chub
Nocomis leptocephalus
· Red eyes








White Sucker
Catastomus commersoni
· Scales smaller anteriorly
· Thick lips




Stoneroller
Campostoma anomalum

· Horseshoe shaped mouth






Please identify these two fish for me!



I need to know these for my Ichthyology lab practical!!
Genus?
Species?

Never give a sucker a ....



These two fish look similar; however, the photographers tell me they are different species.
First, to what genus do they belong? Why?

If you had the fish in your hand, what characteristics would you look at?

Would it help if I told you that:
The lips of the top specimen are plicate. The lower lip of the bottom specimen issubplicate.
Lips of the top specimen are larger that lips of lower specimen.
If you dissected out the pharyngeal teeth, you would see molariform teeth on top specimen and comblike teeth on bottom specimen.

Wednesday, April 29, 2009

Unknown fish to Identify




Post your Fish Collected and Identified on Field Trips HERE



To prepare for the lab practical, each group should post results of field trips. Let's share those identifications here. Click comment below and post your list of species, key diagnostic characteristics you used, and photos. List members of your group so appropriate credit is recorded.

Tuesday, April 28, 2009

Unknown Species Identification


Key Characteristics
-short head, terminal mouth, short barbels around mouth
-small eyes
-broad tail
-dark line on side
-gold-brown coloration
-short pectoral spine

Unknown Species Identification


Key Characteristics
-forked tail fin
-terminal mouth
-rounded snout
-fins=pale olive
-spawning males have orange belly/lower side