Essays about: "hatchery-reared"
Showing result 1 - 5 of 9 essays containing the word hatchery-reared.
-
1. Future management of Laisriver Brown trout : what life history and enhancement strategy should be prioritized?
University essay from SLU/Dept. of Wildlife, Fish and Environmental StudiesAbstract : The life history and coexistence of subpopulations of brown trout in the same drainage area are relatively well known. The three forms of trout; sea-run, lake-run and resident, can all be present in the same location at some period of their life cycle, e.g. during the parr stage or at spawning. READ MORE
-
2. Den vuxna laxens migration i Vindelälvens laxtrappa
University essay from SLU/Dept. of Wildlife, Fish and Environmental StudiesAbstract : Lax, Salmo salar, har en anadrom livscykel. Den spenderar delar av sitt liv ute i saltvatten i havet innan den simmar tillbaka till sitt söta hemvatten för lek. För en del laxar blockeras de naturliga vandringsvägarna till lekplatsen av vattenkraftverk. Konstgjorda laxtrappor byggs ibland för att underlätta vandringen. READ MORE
-
3. Impact of Great cormorant (Phalacrocorax carbo sinensis) on post-smolt survival of hatchery reared salmon (Salmo salar) and sea trout (Salmo trutta)
University essay from SLU/Dept. of Wildlife, Fish and Environmental StudiesAbstract : To compensate for the losses due to altered stream habitat large amounts of hatchery-reared Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) are released into the Baltic Sea each year. During the last decades there have been an overall declining trend in the post-smolt survival of both hatchery reared and wild salmon in the Baltic Sea. READ MORE
-
4. Effects of Body Condition on Facultative Anadromy in Brown Trout (Salmo trutta)
University essay from SLU/Dept. of Wildlife, Fish and Environmental StudiesAbstract : Fish behavior and life history is influenced by factors such as the environment, genetics, and their physiological state. One key life history stage in brown trout is decision to migrate to the sea or reside in the river. The energy status and body condition of the fish is thought to play a role in the timing and duration of migration to the sea. READ MORE
-
5. Effectiveness of a fish-guiding device for downstream migrating smolts of Atlantic salmon (Salmo salar L.) in the River Piteälven,northern Sweden
University essay from SLU/Dept. of Wildlife, Fish and Environmental StudiesAbstract : Hydropower poses a major threat to both upstream and downstream migrating Atlantic salmon (Salmo salar L.). To ensure a relatively safe route for migrating fish, fish ways and different guidance structures are constructed to help fish to bypass the turbine intakes to power stations. READ MORE
