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Fathead minnow
Fathead minnow (Pimephales promelas), also known as fathead or tuffy, is a species of freshwater ray-finned fish belonging to the family Leuciscidae, the shiners, daces and minnows. The natural geographic range extends throughout much of North America, from central Canada south along the Rockies to Texas, and east to Virginia and the Northeastern United States. This minnow has also been introduced to many other areas via bait bucket releases. Its golden, or xanthic, strain, known as the rosy-red minnow, is a very common feeder fish sold in the United States and Canada. This fish is also known for producing Schreckstoff (a distress signal).
The fathead minnow in its wild form is generally dull olive-grey in appearance, with a dusky stripe extending along the back and side, and a lighter belly. There is a dusky blotch midway on the dorsal fin. Breeding males acquire a large, grey fleshy growth on the nape, as well as approximately 16 white breeding tubercles on the snout.
Typical total lengths are between 7 and 10 cm (2.8 and 3.9 in).
Fathead minnows are distributed across North America from Chihuahua, Mexico, north to the Maritime Provinces and Great Slave Lake drainage of Canada and have been introduced to Atlantic and Pacific coastal drainage basins in the United States. Their tolerance for multiple environmental conditions, characteristics of their life history, and their popularity as bait species contribute to their widespread distribution. The fathead minnow is quite tolerant of turbid, low-oxygen water and can most commonly be found in small lakes, ponds, and wetlands. They can also be found in larger lakes, streams, and other habitats.
Fathead minnows are omnivores that are categorized as Benthic filter feeders, sifting through dirt and silt to find food. The carnivorous portion of their diet is made up of mainly insects, crustaceans, other aquatic invertebrates, and zooplankton. The herbivorous portion of their diet is primarily made up of algae and phytoplankton. Fathead minnows will also feed on bottom detritus.
Fathead minnows are a largely preyed upon fish that is eaten by mainly piscivorous fish such as Largemouth Bass, Northern Pike, Yellow Perch, Walleye, and various other types of fish.
Ostariophysan fishes, which include fathead minnows, possess an alarm substance, or Schreckstoff, in distinctive epidermal club cells. The alarm substance is released upon mechanical damage to these club cells due to a predator attack, and can be detected by other ostariophysan fishes which then engage in antipredator behaviors such as hiding or dashing away. Fathead minnows learn to recognize an animal as a potential predator when it is presented in conjunction with the alarm substance. Also, alarm substance ingested by the predator will chemically label it as dangerous to naïve fathead minnows, thereby resulting in learned predator recognition. Prey fishes with chemical predator recognition abilities can inhabit areas with low visibility and more quickly detect ambush predators like the fathead minnow's primary predator, the northern pike.
In the fathead minnow, the female supplies the eggs and the male cares for them until they hatch. The male defends a nest as females pass by and spawn eggs to be cared for by the male. In choosing a nest site, the newly reproductive male fathead minnow tends to take over the nest site of a parental male and evicting its resident rather than occupying an empty one. Also, when given the choice between different unguarded nest sites, it will usually choose the one that already contains eggs. The newer and more numerous the eggs are in the nest site, the more likely the current male is to be challenged by the newcomer. The new male will care for the old male's eggs, a behavior called allopaternal care. Paternal care of the eggs by the male includes rubbing the dorsal pad of mucus-secreting cells, which aerates the eggs and may help prevent disease; removing of diseased eggs from the clutch; and defending the clutch from egg predators, which include animals such as crayfish. This has been shown to increase the survival of the eggs, probably because the newer male is fitter and better able to protect them than the former. Egg survival and parental care behaviors also increase as the clutch size increases. Females also prefer to spawn with males that already have eggs in their nest sites, and the more the better. A male fathead minnow defends the nest site for about three to five weeks at a time, thus continual turnover of new males in the population occurs. The cost of allopaternal care is relatively small because fathead minnow eggs hatch in about five days, while the males can maintain a nest for about three to five weeks; thus, only a small proportion of the eggs that the male takes care of will ever have been adopted.
Hub AI
Fathead minnow AI simulator
(@Fathead minnow_simulator)
Fathead minnow
Fathead minnow (Pimephales promelas), also known as fathead or tuffy, is a species of freshwater ray-finned fish belonging to the family Leuciscidae, the shiners, daces and minnows. The natural geographic range extends throughout much of North America, from central Canada south along the Rockies to Texas, and east to Virginia and the Northeastern United States. This minnow has also been introduced to many other areas via bait bucket releases. Its golden, or xanthic, strain, known as the rosy-red minnow, is a very common feeder fish sold in the United States and Canada. This fish is also known for producing Schreckstoff (a distress signal).
The fathead minnow in its wild form is generally dull olive-grey in appearance, with a dusky stripe extending along the back and side, and a lighter belly. There is a dusky blotch midway on the dorsal fin. Breeding males acquire a large, grey fleshy growth on the nape, as well as approximately 16 white breeding tubercles on the snout.
Typical total lengths are between 7 and 10 cm (2.8 and 3.9 in).
Fathead minnows are distributed across North America from Chihuahua, Mexico, north to the Maritime Provinces and Great Slave Lake drainage of Canada and have been introduced to Atlantic and Pacific coastal drainage basins in the United States. Their tolerance for multiple environmental conditions, characteristics of their life history, and their popularity as bait species contribute to their widespread distribution. The fathead minnow is quite tolerant of turbid, low-oxygen water and can most commonly be found in small lakes, ponds, and wetlands. They can also be found in larger lakes, streams, and other habitats.
Fathead minnows are omnivores that are categorized as Benthic filter feeders, sifting through dirt and silt to find food. The carnivorous portion of their diet is made up of mainly insects, crustaceans, other aquatic invertebrates, and zooplankton. The herbivorous portion of their diet is primarily made up of algae and phytoplankton. Fathead minnows will also feed on bottom detritus.
Fathead minnows are a largely preyed upon fish that is eaten by mainly piscivorous fish such as Largemouth Bass, Northern Pike, Yellow Perch, Walleye, and various other types of fish.
Ostariophysan fishes, which include fathead minnows, possess an alarm substance, or Schreckstoff, in distinctive epidermal club cells. The alarm substance is released upon mechanical damage to these club cells due to a predator attack, and can be detected by other ostariophysan fishes which then engage in antipredator behaviors such as hiding or dashing away. Fathead minnows learn to recognize an animal as a potential predator when it is presented in conjunction with the alarm substance. Also, alarm substance ingested by the predator will chemically label it as dangerous to naïve fathead minnows, thereby resulting in learned predator recognition. Prey fishes with chemical predator recognition abilities can inhabit areas with low visibility and more quickly detect ambush predators like the fathead minnow's primary predator, the northern pike.
In the fathead minnow, the female supplies the eggs and the male cares for them until they hatch. The male defends a nest as females pass by and spawn eggs to be cared for by the male. In choosing a nest site, the newly reproductive male fathead minnow tends to take over the nest site of a parental male and evicting its resident rather than occupying an empty one. Also, when given the choice between different unguarded nest sites, it will usually choose the one that already contains eggs. The newer and more numerous the eggs are in the nest site, the more likely the current male is to be challenged by the newcomer. The new male will care for the old male's eggs, a behavior called allopaternal care. Paternal care of the eggs by the male includes rubbing the dorsal pad of mucus-secreting cells, which aerates the eggs and may help prevent disease; removing of diseased eggs from the clutch; and defending the clutch from egg predators, which include animals such as crayfish. This has been shown to increase the survival of the eggs, probably because the newer male is fitter and better able to protect them than the former. Egg survival and parental care behaviors also increase as the clutch size increases. Females also prefer to spawn with males that already have eggs in their nest sites, and the more the better. A male fathead minnow defends the nest site for about three to five weeks at a time, thus continual turnover of new males in the population occurs. The cost of allopaternal care is relatively small because fathead minnow eggs hatch in about five days, while the males can maintain a nest for about three to five weeks; thus, only a small proportion of the eggs that the male takes care of will ever have been adopted.