Geographic Range. Freshwater drum are the only members of the family Sciaenidae that inhabit freshwater. They have a vast distribution range that extends. Aplodinotus grunniens Rafinesque, Common name: Freshwater Drum. Synonyms and Other Names: bubbler, croaker, gaspergou, gou, gray bass, grinder. Image of Aplodinotus grunniens. Aplodinotus grunniens Trusted. Creative Commons Attribution Non Commercial Share Alike (CC BY-NC-SA

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University Press of Mississippi. Iteroparous animals must, by definition, survive over multiple seasons or periodic condition changes. They have a vast distribution range that extends from as far north as the Hudson Bay to their extreme southern range in the Rio Usumacinata Basin of Guatemala.

Freshwater Drum (Aplodinotus grunniens)

Freshwater drum can reach lengths up to. Referring to an animal that lives on or near the bottom of a body of water.

Freshwater drum average inches in length. The diet of the freshwater drum is generally benthic and composed of macroinvertebrates mainly aquatic insect larvae and bivalve musselsas well as small fish in certain ecosystems. The Animal Diversity Web is an educational resource written largely by and for college students.

There is no parental involvement among freshwater drum after spawning. It has a humped back with a long, sloping forehead and white lips. The Ohio Journal of Science. Freshwater drum are seemingly promiscuous because males and females disperse eggs and sperm into the water column where fertilization is rather random.


This noise comes from a special set of muscles within the body cavity that vibrate against the swim bladder. Aplodinotus grunniens Freshwater Drum. The anal fin has two spines, the first being much shorter than the second, and seven soft rays. Known to produce sound. The freshwater drum is not federally or state listed by any states.

It feeds on many different types of food from crustaceans and seeds to minnows and aquatic insects.

Freshwater Drum/Sheepshead (Aplodinotus grunniens)

This map was computer-generated and has not yrunniens been reviewed. Retrieved from ” https: Freshwater drum tend to hang out with walleye. Texas Parks and Wildlife Sign our Guest Book. The eggs are fertilized and left floating near the surface of the water, where the eggs, and subsequently the larvae, are carried by currents. Iverson Fish of the Mississippi River Introduction The freshwater drum is a fish known for its noise.

Freshwater Drum Aplodinotus grunniens. Thus, many freshwater drum are harvested as bycatch from targeted higher-value species. Adults feed on aquatic insect immatures such as mayflies Hexageniaaplodinohus, fish especially shad and young drumcrayfish and mollusks. The freshwater aplidinotus is gray or silvery in turbid waters and more bronze or brown colored in clearer waters.

The scales are ctenoid and the lateral line scales can range from 49 to The freshwater drum prefers clear water, but it is tolerant of turbid and murky water.

They peruse the bottom in schools in search of many different aplodinotis. This feature gives the species its name, grunnienslatin for “grunting”.

Freshwater drum breed seasonally aplodnotus open water. The percentage of fish in their diet at this time ranges ggrunniens percent. Volume 99, Issue 3, Larvae stay attached to the surface film until they obtain enough muscle strength to swim into deeper water.


They then proceed to move into deeper waters to begin feeding and are considered juveniles at 15 mm. They also have a long dorsal fin relative to their total length that contains a deep notch. Common Name of Aplodinotus grunniens.

Houghton Mifflin Company, Boston. The purpose of the grunting is unknown, but due to it being present in only mature males, it is assumed to be linked to spawning.

They do not control populations however they may contribute to high numbers of mortality in these nuisance mussells. There is some indication that this fish, with its big molar-like crushing teeth, may be learning to eat zebra mussels.

During its first year, the freshwater drum serves as a forage fish for many species of predatory fish. The sexes are not dimorphic. These fish also have exceptionally large inner ear bones called otoliths. Immature drum are preyed on by many different predatory fishes such as Sander vitreusEsox masquinongyEsox luciusAplodinotus grunniensand gulls Larussuch as Larus argentatus. Geographic Range Freshwater drum are the only members of the family Sciaenidae that inhabit freshwater.