Guide for Jeopardy - 2006
1a) What is the family of this fish?
Catostomidae (Smallmouth buffalo, Ictiobus bubalus)
1b) What is the family of this fish?
Aphredoderidae (Aphredodedrus sayanus, Pirate Perch)
1c) Name two differences between these families?
Separate spiny dorsal fins, 3 anal fin spines in the yellow bass
Joined dorsal fins in centrarchids and <3 or >5 anal fin rays
Moronids have an opercular spine
1d) Name one diagnostic difference between these two families?
Osmeridae lack axillary process; have tongue teeth.
Salmonidae have axillary process.
1e) Name one morphological difference between these two families.
Atherinidae have spiny fins, but no lateral line
Fundulidae have soft-rayed fins, and a lateral line
2a) Genus and species (Common and Scientific Name)
Channel catfish (Ictalurus punctatus)
2b) Genus and species (Common and Scientific Name)
Northern hog sucker (Hypentelium nigricans)
2c) Genus and species (Common and Scientific Name)
Northern pike (Esox lucius)
2d) Genus and species (Common and Scientific Name)
Green sunfish (Lepomis cyanellus)
2e) Genus and species (Common and Scientific Name)
Rainbow darter (Etheostoma caeruleum)
3a) What are the function of the spines on the dorsal and anal fins of this fish?
Increase effective body depth, which deters predators
3b) What is the function (and name) of the structures indicated in the picture?
Finlets reduce hydrodynamic drag
3c) How does this fish capture its prey?
Ambush
3d) Which fins are modified in this fish? Describe how they are used.
The pectoral (and pelvic) fins are greatly enlarged, which allows this fish to glide
through the air for moderate distances to escape predators.
3e) What is the name of this structure? Why is it a major advantage for fishes that have
it? Pharyngeal jaws are used to break down food by grinding it. They allow fish to eat
‘tough’ items such as fibrous plant material or hard-shelled crustaceans.
4a) What are the arrows pointing at? How does it work?
The lateral line senses vibrations in the water. It is made up of a series of pores,
in which hair cells, which detect vibration and pass the signal to the central nervous
system.
4b) Name the three parts of the gill structure.
A. gill filaments, B. gill arch, C. gill rakers
4c) Answer is smelling capacity
4d) Answer is hearing
4e) To what structure is the arrow pointing? What is the function of this structure?
Webberian apparatus. Improve the hearing capability.
5a) Answer is mesopelagic, epipelagic areas, coral reefs.
5b) What is the function of this type of ‘grouping’?
Evading predators
5c) What are the defenses on this fish?
Scorpion fish has venomous spines.
5d) The Mola mola is a widely distributed fish, what marine area do you expect this fish
to be swimming?
Epipelagic areas
5e) Based on its morphology, where could you expect this fish to be swimming?
Brown bullhead. Benthic areas.
6a) Answer is a ‘jack’
6b) Answer is pelagic and demersal
6c) Answer is bull, female mimic, and sneaker.
6d) Answers are polygyny, polyandry, promiscuity, and monogamy.
6e) Nest spawners: Centrarchids, some Cyprinids, many others.
Mouth brooders: Cichlids, bonytongues
Internal bearers: Sharks, guppies, surfperches
DOUBLE JEOPARDY
1f) In which family does this fish belong?
Phoxinus eos… Cyprinidae
1g) In which family does this fish belong?
Lepisosteus osseus… Lepisosteidae
1h) What is one major difference between these two families?
Petromyzontidae and Myxinidae.
1i) What is one major difference between these two families?
Clupeidae and Cyprinidae.
1j) In which family does this fish belong?
Hidontidae (Hiodon tergisus)
2f) Genus and species (Common and Scientific Name)
Black crappie (Pomoxis nigromaculatus)
2g) Genus and species (Common and Scientific Name)
Brook stickleback (Culea inconstans)
2h) Genus and species (Common and Scientific Name)
Brown trout (Salmo trutta)
2i) Genus and species (Common and Scientific Name)
Trout-perch (Percopsis omiscomaycus)
2j) Genus and species (Common and Scientific Name)
Slenderhead darter (Percina phoxocephala)
3f) What structure if the arrow pointing at?
Pelvic fins
3g) What kind of scales does this fish have?
Ganoid.
3h) Which fish is more derived and why?
The largemouth bass is more derived because it has a protrusible jaw,
thoracically-placed pelvic fins, spiny fins, and ctenoid scales.
3i) What is the arrow pointing at? stomach
3j) Where does this fish live? What does it eat?
Benthic areas, eats detritus, benthic invertebrates, plant material
4f) Favorite food?
Blood
4g) Favorite food?
Zooplankton
4h) Favorite food?
Benthic invertebrates
4i) Favorite food?
Fish
4j) Favorite food?
Jellyfish
5f) Which fish is more derived? Why?
The sea lamprey is more derived because it is a vertebrate, while the hagfish is
only a poor chordate.
5g) Which fish is more derived? Why?
The gar is more derived because it has scales and only a partially heterocercal tail.
5h) Which fish is more derived? Why?
The darter is more derived because it has a protrusible jaw, thoracically-placed
pelvic fins, spiny fins, and ctenoid scales.
5i) Answers include development of homocercal tail, improved flexibility and lighter
weight of scales, and laterally positioned pectoral fins.
5j) Answer is the lemur and the coelacanth.
6f) Answers are A. Ameiurus natalis, B. Ameiurus melas, C. Ameiurus nebulosus.
6g) C is consumption, A is activity, G is gonadal growth
6h) Red line is total consumption, blue line is (mass) specific consumption.
FINAL) The humpback chub (Gila cypha) is native to the Colorado River. It prefers
deep, fast-moving, turbid waters and feeds predominately on small aquatic insects,
diatoms and filamentous algae.