Density-dependence is a major ecological mechanism that is known to limit individual growth. To examine if compensatory growth (unusually rapid growth following a period of imposed slow growth) in nature is density-dependent, one-year-old brown trout (Salmo trutta L.) were first starved in the laboratory, and then released back into their natural stream, either at natural or at experimentally i...

We applied the adaptive management approach to analyze the demand and feasibility of adaptive management of fish stocks in a large regulated lake, Oulujärvi, in northern Finland. The process consisted of four phases: (1) analysis of the current state of the fisheries system (fishers, related markets and industry, fisheries researches and authorities, related organizations, etc.); (2) analysis o...

Metabolic rates reflect the energetic cost of living but exhibit remarkable variation among conspecifics, partly as a result of the constraints imposed by environmental conditions. Metabolic rates are sensitive to changes in temperature and oxygen availability, but effects of food availability, particularly on maximum metabolic rates, are not well understood. Here, we show in brown trout (Salmo...

The reproductive characteristics of 2 brown trout (Salmo trutta) populations were examined in 2 tributaries, the Anuri and Cenker streams, of the Çoruh River, north-eastern Turkey. Sampling was carried out by electrofishing monthly from November 2000 to October 2002. Age varied from 0 to 6 in the Anuri Stream, and from 0 to 7 in the Cenker Stream. Fork length (L) ranges were 4.29-29.9 cm and 3....

Most predictions about species responses to climate change ignore species interactions. Helland and colleagues (2011) test whether this assumption is valid by evaluating whether ice cover affects competition between brown trout [Salmo trutta (L.)] and Arctic charr [Salvelinus alpines (L.)]. They show that increasing ice cover correlates with lower trout biomass when Arctic charr co-occur, but n...

Temperature is a limiting factor in the distribution of many animals. The ova of brown trout (Salmo trutta) can develop without excessive mortality at water temperatures between 3 and 15° C. (Gray, 1928), while for adult trout, mortality is high above 20 and complete above 25 C. (Gardner & Leetham, 1914; Audige\ 1921; Gardner, 1926). It is generally assumed that temperature is the most importan...

JAVIER LOBÓN-CERVIÁ* , PHAEDRA BUDY AND ERIK MORTENSEN *Department of Evolutionary Ecology, National Museum of Natural Sciences (CSIC), Madrid, Spain Department of Watershed Sciences, Utah State University, Logan, UT, U.S.A. and U.S. Geological Survey, Utah Cooperative Fish and Wildlife Research Unit, Intermountain Center for River Rehabilitation and Restoration, Utah State University, Logan, U...