Molecular characterization of rare anadromous Rhône River brown trout

An experimental field evaluation of winter carryover effects in semi-anadromous brown trout (Salmo trutta).

For semi-anadromous brown trout, the decision whether or not to smoltify and migrate to the sea is believed to be made at the end of the preceding summer in response to both local environmental conditions and individual physiological status. Stressors experienced during the fall may therefore influence their propensity to migrate as well as carry over into the winter resulting in mortality when...

Movement and Survival of Brown Trout and Rainbow Trout in an Ozark Tailwater River

We evaluated the movement of adult brown trout Salmo trutta and rainbow trout Oncorhynchus mykiss in relation to a catch-andrelease area in the White River downstream from Beaver Dam, Arkansas. Nine fish of each species were implanted with radio transmitters and monitored from July 1996 to July 1997. The 1.5km river length of a catch-and-release area (closed to angler harvest) was greater than ...

Severe helminthic infection of the wild brown trout (Salmo trutta) in Cetina River, Croatia; Preliminary observation

Elevated mortalities of brown trout (Salmo trutta m. fario) and grayling (Thymallus thymallus) were noticed in the Cetina River at the end of the February. Local anglers collected the samples of moribund fish and submitted them to the laboratory for examination. Ectoparasitological, bacteriological and virological examination did not reveal any ectoparasite, bacteria or viral agents, however py...

Effects of pH on sodium uptake in Norwegian brown trout (Salmo trutta) from an acid river.

Sodium uptake rates were measured in wild and hatchery reared Norwegian brown trout (Salmo trutta) exposed to media of a range of pH. Sodium uptake was strongly dependent on external acidity, being reduced in media of low pH. Wild fish from the naturally acid R. Tovdal (S. Norway) were more tolerant of acid media than hatchery reared fish. The effects of increasing external sodium concentration...

Downstream migration of brown trout (6DOPR WUXWWD smolts past hydropower plants in the River Emån