Cestode larvae Diphyllobothrium dendriticum as a cause of heart disease leading to mortality in hatchery-reared sea trout and brown trout

Nocardial Infection in Hatchery-reared Fingerling Rainbow Trout (salmo Gairdneri).

Effect of experimental Diphyllobothrium dendriticum infection on the blood leucocyte pattern of brown trout at two temperature levels

Leucocyte composition in the peripheral blood of brown trout Salmo trutta m. lacustris (L.) aged 1+ was studied in relation to Diphyllobothrium dendriticum (Cestoda) infection at two temperature levels, heated about 15 °C and non-heated which decreased from 11 °C to 7 °C. Blood samples were taken from control and infected fish 12 weeks post infection. The D. dendriticum infection (1–6 per fish)...

Evaluation of otolith shape variability in hatchery-reared brook trout (Salvelinus fontinalis), Black Sea trout (Salmo trutta labrax) and their hybrid

In aquaculture, the process of hybridization is used to produce animals that have better growth rates, meat quality, and higher resistance and tolerance to environmental variations than their parental species. The identification of a hybrid fish may require a DNA-based technology that is an expensive process. In this study, the sagittal otolith shape of hatchery-reared brook trout (Salvelinus f...

Occurrence of Loma cf. salmonae in brook, brown and rainbow trout from Buford trout hatchery, Georgia, USA.

During a 6 mo study of moribund trout from Buford hatchery, Buford, Georgia, USA, a Loma cf. salmonae microsporidian parasite was studied in the gills of brook trout Salvelinus fontinalis, brown trout Salmo trutta, and rainbow trout Oncorhynchus mykiss. This parasite was morphologically similar to L. salmonae and L. fontinalis but differed in spore size. Scanning and transmission electron micro...

Growth and mortality of brown trout, Salmo trutta fario in Lar dam, Iran

    The length-weight relationship, age, growth parameters, sex ratio, mortality and exploitation rate of Salmo trutta fario were determined in Lar dam. The sex ratio (male: female) was 1:1.84 which differed significantly from the expected 1:1. The length-weight regression was (females) and (males) indicating a negative allometric growth for both sexes. Growth parameters were estimated as L∞ = ...