Ameiurus


Ameiurus is a genus of catfishes in the family Ictaluridae. It contains the three common types of bullhead catfish found in waters of the United States, the black bullhead, the brown bullhead, and the yellow bullhead, as well as other species, such as the white catfish, which are not typically called "bullheads".
The species known as bullheads can be distinguished from channel catfish and blue catfish by their squared tailfins, rather than forked.

Taxonomy and fossil record

Ameiurus is recognized as monophyletic, meaning it forms a natural group. It is mostly closely related to the clade formed by the genera Noturus, Prietella, Satan, and Pylodictis.
There is a sister group relationship between the species A. melas and A. nebulosus.

Species

Extant Species

There are currently seven recognized species in this genus:
There are currently eight recognized fossil species in this genus: The oldest, A. pectinatus, gives a minimum age estimate for the genus at approximately 30 million years, during the Oligocene.
Living species of Ameiurus catfishes are natively distributed east of the North American continental divide, from their westernmost point in central Montana, south to Texas, in streams of the Gulf of Mexico and Atlantic Coast, north to New Brunswick and Quebec, Ontario, Manitoba, and Saskatchewan.

Habitat

Bullheads live in a variety of habitats, including brackish and/or low oxygen ponds, rivers and lakes, although they are seldom stocked intentionally. They are bottom feeders and eat virtually anything edible, including dead fish, insects, other fish, grain, fruit, crayfish and more. Because of their limited use as for sport, they are usually caught while trying to catch other fish, and few anglers pursue them specifically. Persons looking to catch bullheads will use the same bait as they would for channel catfish, including cut bait, chicken livers, blood-soaked meal, or other pungent baits. In the Northeastern US Bullheads are often sold to restaurants in the spring for "fish fries" by amateur fisher folk by the 5 gallon bucket load. Like all catfish, bullheads have a sense of smell that is more developed than most canines.

Description and identification

Bullheads do not get as large as the other catfishes native to North America, with average sizes in the one to two-pound range and world record sizes well under.
All three major bullheads can be confused with other catfishes by novice anglers. Because they have an unforked tail, many people mistakenly think small flathead catfish are bullheads. Both have the squared tail, and can have a mottled, brown appearance, but the flathead lower lip protrudes farther than its upper lip and it has a flat or "shovel" head. They also have very different habits and habitat.
Flatheads generally eat only live things, while bullheads will freely eat dead fish or other small animals. The flathead is more likely to be found at the bottom of dams or in gravel pits, while bullheads are found more often in the more murky areas. Additionally, flatheads can reach weights well in excess of, while the current world's record for any bullhead is a black bullhead, recorded at even while the average adult is perhaps. Brown and yellow bullheads are significantly smaller.

Relationship to humans

They are considered rough fish by many, and are seldom caught for food, although they can be quite edible if caught in clear water and prepared correctly. In Minnesota, bullhead are important to commercial fishermen, who harvest about 1 million pounds a year.
Bullheads can make excellent live bait for larger catfish species such as Flathead catfish in states where legal.