Alosa to detect ultrasound (at frequencies above 20 kHz, which is the limit of human hearing). This was first discovered by fisheries biologists studying a type of shad known as blueback herring, and was later verified in laboratory studies of hearing in American shad. This ability is thought to help them avoid dolphins that find prey using echolocation. "Alosa" species are generally pelagic. They are mostly anadromous or semianadromous with the exception of strictly freshwater landlocked species. "Alosa" species are generally migratory and schooling fish. Males usually mature about a year before females; they spawn in the late spring to summer.
Smoked fish provinces, but is a popular deli item throughout the country. Smoked fish is a prominent item in Russian cuisine, Ashkenazi Jewish Cuisine, and Scandinavian cuisine, as well as several Eastern and Central European cuisines and the Pacific Northwest cuisine. In Israeli cuisine, smoked trout is traditionally eaten as part of meze, especially at breakfast. Sometimes rosemary leaves are added. Trout can be found in streams and rivers across the country as well as in the Sea of Galilee. English, Scottish and Canadian cuisine incorporate a variety of strongly brined, smoked herring that used to be known as "red herring". With