| Autor: |
Toledo-Solís FJ; Department of Biology and Geology, University of Almeria, 04120 Almeria, Spain.; Centro de Investigaciones Costeras-ICBiol-UNICACH, Calle Juan José Calzada s/n, Tonalá 30500, Chiapas, Mexico., Mokhles Abadi Farahani A; Department of Natural Resources (Fisheries Division), Isfahan University of Technology (IUT), Isfahan 8415683111, Iran.; Centro Oceanográfico de Vigo, Instituto Español de Oceanografía, (IEO), CSIC, Subida a Radio Faro 50, 36390 Vigo, Spain., Yagüe S; Centro de Investigación en Acuacultura, Instituto Tecnológico Agrario de Castilla y León (ITACyL), Ctra. Arévalo, Zamarramala, 40196 Segovia, Spain., Mateos-Aparicio I; Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid, Spain., Pérez V; Campus Vegazana s/n, Universidad de León, 24071 León, Spain., Larrán AM; Centro de Investigación en Acuacultura, Instituto Tecnológico Agrario de Castilla y León (ITACyL), Ctra. Arévalo, Zamarramala, 40196 Segovia, Spain., Moyano FJ; Department of Biology and Geology, University of Almeria, 04120 Almeria, Spain., Fernández I; Centro Oceanográfico de Vigo, Instituto Español de Oceanografía, (IEO), CSIC, Subida a Radio Faro 50, 36390 Vigo, Spain.; Centro de Investigación en Acuacultura, Instituto Tecnológico Agrario de Castilla y León (ITACyL), Ctra. Arévalo, Zamarramala, 40196 Segovia, Spain. |
| Abstrakt: |
In fish diets, soybean meal (SBM) is still positioned as the most widely used alternative to replace fishmeal. Red vetchling ( Lathyrus cicera ), a crop locally produced in Europe, is here evaluated as a substitute for SBM. Rainbow trout ( Oncorhynchus mykiss ) juveniles (10.34 ± 0.04 g) were fed for 90 days. Six experimental diets replacing the SBM content at 0, 8, 16, 33, 66, and 100% (Named Control, T8, T16, T33, T66, and T100) were tested. Growth performance and fish fillet amino acid composition were only significantly reduced in fish fed the T100 diet. Histopathological analysis showed that no major alterations were observed in the intestine, while T100 fish had a higher density of pyknotic nuclei in the hepatocytes than the Control, but similar hepatocyte surface coverage. Finally, postprandial levels of glucose and triglycerides in blood plasma decreased when red vetchling content was increased, but was only not fully restored after 24 h in the case of glucose in T66 and T100 fish. According to these results, red vetchling meal can replace up to 66% of the SBM without a negative effect on fish growth or physiology, representing a good alternative raw material for reducing European aquaculture's dependency on SBM imports and the carbon footprint of aquafeeds. |
