Journal
LATIN AMERICAN JOURNAL OF AQUATIC RESEARCH
Volume 48, Issue 1, Pages 38-46Publisher
UNIV CATOLICA DE VALPARAISO
DOI: 10.3856/vol48-issue1-fulltext-2334
Keywords
Arapaima gigas; growth; production; management; size sorting; size variation
Categories
Funding
- Brazilian Ministry of Agriculture, Livestock and Supply through the National Council of Technological and Scientific Development (CNPq) [No457465/2012-3]
- Brazilian Micro and Small Business Support Service (SEBRAE) through the Tocantins Research Foundation [9/2012, 2538/2012]
Ask authors/readers for more resources
Size grading is a common management practice in fish farming to minimize growth variability. Such practice has not been established for pirarucu Arapaima gigas. Therefore, the present study assessed the effect of size grading on the growth of pirarucu. Juvenile pirarucu were divided into three groups: ungraded fish (U: mean initial weight 1.12 kg), small fish (S: mean initial weight 0.81 kg), and large fish (L: mean initial weight 1.36 kg), and reared for 129 days (phase I) and 158 additional days (phase II), consecutively. No significant difference was observed in the final length, specific growth rate, biomass, survival and feed conversion rate between fish groups. Ungraded fish presented a greater decrease in the coefficient of variation for weight in phase I than in phase II. Size sorting resulted in significantly higher growth after 287 days of farming in the L-graded fish (9.49 kg, final weight), followed by the ungraded group (8.80 kg) and S -graded group (8.01 kg). However, the mean weight of pooled S- and L-graded fish was similar to the ungraded fish group in phase I and phase II, indicating that grading did not improve the general performance of pirarucu in captivity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available