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The allis shad (Alosa alosa) is a widespread Northeast Atlantic species of fish in the Alosidae family. It is an anadromous fish which migrates into fresh water to spawn. [ 1 ] [ 3 ] It is found in the eastern Atlantic Ocean, the western Baltic Sea and the western Mediterranean Sea.
Skipjack herring were historically found in the northern upper Mississippi River and the St. Croix River; however, there have only been four records of skipjack shad in Wisconsin waters since the 1950s. [5] Because this fish is a migratory species, dams have diminished its distribution.
Many species of salmon are anadromous and can migrate long distances up rivers to spawn Allowing fish and other migratory animals to travel the rivers can help maintain healthy fish populations. Fish migration is mass relocation by fish from one area or body of water to another. Many types of fish migrate on a regular basis, on time scales ...
The Alabama shad grows to be 12–18 inches (30–46 cm) in length [4] and may reach 3 pounds (1.4 kg). [5] The upper jaw of the fish bears a median notch. [6] The Alabama shad has 42 to 48 gill rakers on the first gill arch's lower limb, [7] which is intermediate between those of two anadromous clupeids from the Atlantic coast, the hickory shad (Alosa mediocris) [8] and the American shad (A ...
The sauger (Sander canadensis) is a freshwater perciform fish of the family Percidae that resembles its close relative, the walleye. The species is a member of the largest vertebrate order, the Perciformes. [3] It is the most migratory percid species in North America. [4]
Fishes are a paraphyletic group and for this reason, the class Pisces seen in older reference works is no longer used in formal taxonomy.Traditional classification divides fish into three extant classes (Agnatha, Chondrichthyes, and Osteichthyes), and with extinct forms sometimes classified within those groups, sometimes as their own classes: [1]
ITIS provides an automated reference database of scientific and common names for species. As of May 2016, it contains over 839,000 scientific names, synonyms, and common names for terrestrial, marine, and freshwater taxa from all biological kingdoms (animals, plants, fungi, and microbes). While the system does focus on North American species at ...
Each family is given at least one paragraph, and usually a body outline drawing; large families have subfamilies and tribes described as well. Notable genera and species are mentioned, though the book does generally not deal with the species-level diversity. The complexities of the higher taxa are described succinctly, with many references for ...