TITLE

Survival and Development After Incubating and Hatching of Rainbow Trout (Oncorhynchus mykiss) Larvae in Two Different Farming Systems

AUTHOR(S)
COCAN, Daniel; MIREŞAN, Vioara; CONSTANTINESCU, Radu; RĂDUCU, Camelia; IHUł, Andrada
PUB. DATE
July 2013
SOURCE
Bulletin of the University of Agricultural Sciences & Veterinary;2013, Vol. 70 Issue 2, p230
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Given that the market demand for food is growing, aspect correlated with climatic changes more pronounced in the last decade, the growth technologies in fish farms it adapt, trying as much as possible to exclude environmental factors from the production equation. This is possible by maintaining constant physicochemical characteristics of water, artificially, using recirculating systems. Because some of the most important stages of the technological growth of trout are incubation, hatching and post-embryonic development, in this study we want to evaluate the obtained performance in two different growth systems: a classical system for incubation and post-embryonic development, respectively a recirculating system. Taken in the study two groups of 10.000 trout eggs each, with common origins, were studied and monitored: physico-chemical characteristics of the water in the two systems, losses during incubation, hatching rate, survival rate, duration of incubation and growth dynamics during post-embryonic stage. The results showed favorable and approximately constant values of the physico-chemical parameters in recirculating water system, while in the classical system were major variations. Also, the results for the other proposed objectives were favorable for the exploited group in recirculating system. This reflects the importance of recirculating systems using, at least in the early stages of the technological process.
ACCESSION #
91981537

 

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