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.
Herring as food peppercorn, bay leaves and raw onions are added. Other flavors can be added, such as sherry, mustard and dill. The tradition is strong in Scandinavia, The Netherlands, Iceland and Germany. In the Philippines, dried herring is popularly eaten during breakfast, along with garlic rice and eggs. A kipper is a split, gutted and cold smoked herring, a bloater is a whole gutted and cold smoked herring and a buckling is a whole herring, gutted apart from roe or milt and then hot smoked. All are staples of British cuisine. According to George Orwell in "The Road to Wigan Pier", the