Premium
Observations on the Respiration of Trout Fingerlings and a New Method of Transporting Speckled Trout (Salvelinus Fontinalis)
Author(s) -
Prévost Gustave,
Piché Lucien
Publication year - 1939
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1938)68[344:ootrot]2.0.co;2
Subject(s) - trout , fontinalis , salvelinus , fishery , fish <actinopterygii> , environmental science , biology
In view of the necessity of securing a method for the most economical transportation of trout, conditions permitting the accommodation of considerable numbers of fingerlings in relatively small volumes of water, have been determined. A uniform distribution of the fish in the tank is obtained through their vertical separation into groups by the use of perforated metallic shelves; this arrangement prevents the huddling of the fish at the bottom of the tank, and their consequent exhaustion through the continuous struggle they exhibit when this crowding occurs. It insures, at the same time, a rapid and constant diffusion of the oxygen which is supplied at the bottom of the tank by highly efficient diffusers. Experiments showed that fingerlings, the volume of which exceeded 50 per cent of that of the water used, were thus comfortably accommodated for periods of three to four hours. Over longer periods, large quantities of slime accumulated in the water, and caused the death of the fish, but we believe that, if necessary, the adjunction of a pump and filter to the tank would readily eliminate the slime. A description is given of the equipment for the transportation of trout by plane and of the method of planting fish from the air.