Influence of food and age on breeding and reproductive performances in a rainbow trout population
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2009, Vol 2, Issue 2
Abstract
In this work paper we want to found what is the relation between some morphological features and level of sexual products in a rainbow trout population of 3 and 4 years age. Also, we investigated the influence of extruded pellet fodder on quantitative roes and milt development in the two age categories. The effected researches put into evidence the superior development of females comparatively with males, indifferently on age, with significant and ensured differences. Following the roe quantity and number obtained from females of 3 and 4 years age, we observed that after use of extruded fodder are obtained both quantitative and also numerically superior performances comparatively to those ones obtained after feeding with classical pellet fodder and increase during age, the differences being significant and ensured. There were calculated also the correlations between morphological features taken in study and respective some reproduction indices and were established the directions in which exist real selection and improvement chances. After effected researches and obtained results come out a series of conclusions, following that their basis to be taken selection and improvement measures in view to increase breeding and multiplication performances.
Authors and Affiliations
Ioan Bud, M. Boaru, I. Petrescu-Mag
Keywords
Related Articles
- EP ID EP83111
- DOI -
- Views 130
- Downloads 0
Biological de-activation of granular formulation of a carbamate insecticide Cartap in water under laboratory conditions
Cartap 4% (Padan 4G™) at different concentrations was evaluated for its biological deactivation in laboratory-conditions. The insecticide at 1.88 ppm or above concentrations showed significant increase in percent of dead...
Body features and growth dynamics of two rainbow trout (Oncorhynchus mykiss) varieties, Irideus vs. Palomino
Due to diversification of salmonid species which are farmed in Romania, the aim of this study was been to determine the production performances of rainbow trout (Oncorhynchus mykiss), Palomino variety, compared with the...
Efficiency of various flocculants in harvesting the green microalgae Tetraselmis tetrahele (Chlorodendrophyceae: Chlorodendraceae)
This study showed the efficiency of various compounds in flocculating cultures of the microalgae Tetraselmis tetrahele (G. S. West, 1916) for use as potential biodiesel feedstock. Of the five flocculants tested, NaOH and...
Contributions concerning the quality indices’ appreciation in main aquatic organisms, which fall under human consumption
In present work paper, the authors broach a theme of top modernity concerning the fish and other aquatic organisms’ quality, in the context of more and more demand from the consumers’ side. To put into evidence the meat...
Use of 17-α-methyltestosterone for production of male secondary sexual characteristics in the adult female green swordtail (Xiphophorus hellerii).
The green swordtail X. hellerii Heckel, 1848 is a commercially important ornamental species. As phenotypic males with the sword extension of the caudal fin are more valuable economically than fish lacking the sword, masc...