Kype Kype A kype is a hook-like secondary sex characteristic which develops at the distal tip of the lower jaw in some male salmonids prior to the spawning season. The structure usually develops in the weeks prior to, and during, migration to the spawning grounds. In addition to the development of the kype, a large depression forms in the two halves of the premaxilla in the upper jaw, allowing the kype to fit into the premaxilla when the mouth is closed. The kype functions as a secondary sexual characteristic and influences the formation of dominance hierarchies at the spawning grounds. The
The EBCC Atlas of European Breeding Birds subdivision are shown. The book concludes with sections on the Conservation Status of Europe's Birds, a list of species with threat statuses, a set of derived maps depicting overall species richness and richness of threatened species, and a 65-page references section. The book's dustjacket is illustrated by bird artist David Nurney - the front cover shows a common kingfisher (with a map of its distribution), while a European bee-eater is depicted on the spine. The European Ornithological Atlas project was initiated in 1971. Its fieldwork took the form of surveys during the breeding season, in each of the countries within