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Channel
Catfish

The
Channel Catfish, a very popular sport and food fish, is harvested commercially
in some areas. It is the principal catfish reared in aquaculture.
description To 3'11" (1.2 m); 58 lbs (26.3 kg).
Slender; back blue-gray; sides light blue to silvery with scattered dark olive
to black spots; belly white; fins olive to dusky. Head wide, flat to slightly
rounded above; eyes large, above midline of head; upper jaw overhangs lower; 4
pairs of barbels. Adipose fin present; outer edge of anal fin rounded, 24-31
rays; caudal fin deeply forked.
Identification:
The channel cat has a deeply forked tail, with tail
lobes that are sharply pointed. In bigger fish, the fork is less noticeable or
disappears. Channel cats have 24 to 30 rays on the anal fin, a small, fleshy
adipose fin that is separated from the tail, and typical catfish spines on its
dorsal and pectoral fins. The barbels are black and long. The back is blue-gray
to slate-gray or bluish olive. The sides tend to be silvery-gray, and the belly
is whitish. Except for some large adults, especially the males, channel catfish
have small, irregular spots on the sides and back. None of the other catfishes
has these spots. Males become darker, almost blue-black, during spawning time.
Habitat: The channel catfish is an adaptable fish, usually found
in clear, warm lakes and moderately large to large rivers, over clean sand,
gravel or rock-rubble bottoms. It is generally not found in the muddied,
weed-choked waters that some other catfish species frequent. Channel cats,
especially young fish, may be found in fast-flowing water. Usually, channel
catfish prefer deep pools and runs in rivers that have alternating pool and
riffle habitats. It is also found in reservoirs, lakes and farm ponds, and even
in some of the larger trout streams.
Life history: Channel catfish spawn in May to early June, when the
water temperature ranges from 75 to 85 degrees, with 80 degrees the optimum. The
male prepares the nest, which is usually a depression or hole in an undercut
bank, or an excavated burrow under logs or rocks. Sometimes channel cats spawn
in sunken, hollow logs or abandoned muskrat holes. In clear ponds, spawning
channel cats must have semi-darkened shelters, either natural or provided. From
reservoirs, channel catfish sometimes move upstream to spawn in tributary
rivers. A female channel cat may lay 2,000 to 70,000 eggs per year, depending on
her size. After spawning, the males protect the adhesive egg mass and aerate and
clean the eggs by fanning their fins. The males also guard the hatched fish for
a time. Young channel cats are insect-eaters, feeding on mayfly nymphs, caddis
larvae and midge larvae. As they grow, they switch to fish, crayfish and
mollusks, but still feed on aquatic insects, and occasionally eat plant matter.
Yearling and subadult channel cats are more tolerant of fast water than larger
adults. They move out of slow water into the quicker current or swim short
distances into tributary streams to feed. Channel cats feed mostly at night, but
may forage on the bottom, where it’s dim during the day. Channel catfish,
especially young fish, have been known to feed on the surface. Like other
catfish, at night they depend on their barbels and their sense of taste to find
food. Even so, channel cats are believed to be more of a sight-feeder than other
catfishes, because of their clear-water habitat.
White
Catfish

White
Catfish is an important sport fish throughout its native range and where
introduced.
description To 24" (62 cm); 19 lb (8.6 kg).
Moderately robust. Back dark to pale bluish gray; sides lighter, no scattered
dark spots; chin barbels yellowish to white; no dark blotch at dorsal fin base;
adipose fin dusky to black. Posterior edge of pectoral fin spine without strong
serrations; anal fin rounded, with 22–25 rays; caudal fin moderately forked.
Identification: This
medium-sized catfish has a back and upper sides that are light blue-gray to dark
slate-gray. This shades lighter, with gray or blue markings, toward the belly,
which becomes silvery or yellow-white. The chin barbels are whitish. The caudal
fin is somewhat forked, but the fin’s lobes are not as sharply pointed as are
those of the channel catfish, and may be somewhat rounded, especially in older
fish. The head is very broad. Young white catfish are slender. Older fish become
heavy bodied and robust-looking. The spine on each pectoral fin has a sawtoothed
back edge. The anal fin has 25 or fewer rays. The maximum size for the white
catfish is about 24 inches.
Habitat: White catfish live in channels, pools and backwaters in
rivers or streams, mostly in sluggish current over mud bottoms. They go into
swift water, but not as much as channel catfish. Of all the catfishes, white
catfish are the most tolerant of salt water. They live in brackish bays and
tidewater sections of streams. They also live in lakes and river impoundments.
In habitat preference, white catfish are midway between the channel catfish,
which uses firmer bottoms and swift currents, and bullheads, which live in slow
water over soft, silty bottoms.
Life history: The white catfish’s spawning habits are similar to
those of the channel catfish, although it has less of a tendency to migrate when
looking for a spawning site. Male white catfish excavate a burrow nest or use an
existing hole. The sticky egg mass is deposited there by the female. The male
briefly guards the eggs and the young. White catfish eat some plant material,
but they eat mostly animal life like midge larvae and other aquatic insects,
crustaceans and fish.
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