The value of Panagrellus sp. (Nematoda) as food for fish
Kahan, D.; Appel, Z. (1976). The value of Panagrellus sp. (Nematoda) as food for fish, in: Persoone, G. et al. (Ed.) Proceedings of the 10th European Symposium on Marine Biology, Ostend, Belgium, Sept. 17-23, 1975: 1. Research in mariculture at laboratory- and pilot scale. pp. 243-253
In: Persoone, G.; Jaspers, E. (Ed.) (1976). Proceedings of the 10th European Symposium on Marine Biology, Ostend, Belgium, Sept. 17-23, 1975: 1. Research in mariculture at laboratory- and pilot scale. IZWO: Wetteren. ISBN 90-6281-001-2. 620 pp., more
|
| Available in | Authors |
|
Document type: Conference paper
|
| Abstract |
The nutritional value of the nematode Panagrellus sp. as food for fish was determined by chemical analysis and by growth of Danio malabaricus and Poecilia reticulata. The dry weight of Panagrellus sp. nematodes was 7.13 % of the wet weight and consisted of 52 % proteins, 15.4 % carbohydrates, and 13 % lipids. The survival of D. malabaricus larvae fed nematodes was higher than when fed the control diet. After 100 days' feeding on nematodes, the D. malabaricus reached an average length of 21 mm. The growth of P. reticulata larvae fed nematodes was a little better than when fed the control diet and their weight reached approximately 30 mg after 55 days. Indices food utilization calculated from the growth of P. reticulata fish larvae fed nematodes were: conversion factor 7.9-14.3, growth coefficient 2.41-3.36, conversion efficiency 29.8-41.5, protein conversion factor 1.95-2.7. Experiments trying to adapt Panagrellus sp. nematodes to seawater (35 promille salinity) showed that nematodes can grow, at a low rate, in 30 promille salinity. The nematodes tolerated 5 promille and 10 promille salinities better and had a higher reproduction rate in these strenghts. |
|
