Nutritive value and digestibility of macronutrients from sheep and alpaca skin hydrolysates as a new alternative in juvenile rainbow trout (Oncorhynchus mykiss) feeding

Marcelino Jorge Aranibar Aranibar; Bernardo Roque-Huanca; Harnold Segundo Portocarrero-Prado; Francisco Halley Rodriguez Huanca; Maria del Pilar Blanco-Espezua; Heidi Karol Aranibar-Bejar; Simon Foraquita-Choque

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저자정보: Marcelino Jorge Aranibar Aranibar (Universidad Nacional del Altiplano) Bernardo Roque-Huanca (Universidad Nacional del Altiplano) Harnold Segundo Portocarrero-Prado (Universidad Nacional del Altiplano) Francisco Halley Rodriguez Huanca (Universidad Nacional del Altiplano) Maria del Pilar Blanco-Espezua (Universidad Nacional del Altiplano) Heidi Karol Aranibar-Bejar (Universidad Nacional del Altiplano) Simon Foraquita-Choque (Universidad Nacional del Altiplano)

저널정보: 한국수산과학회 Fisheries and Aquatic Sciences Fisheries and Aquatic Sciences 제23권 제4호

발행연도: 2020.1

수록면: 1 - 7 (7page)

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Background: The protein source from fish meal is very important in trout feeding, but it is expensive and very scarce. Alternative nutrient sources are required to achieve sustainability as trout production rapidly grows in Peru. The objective of this research was to determine the proximate chemical composition and the apparent digestibility coefficient (ADC) of dry matter, organic matter, crude protein, crude fat, and digestible energy of hydrolyzed sheep (HSS) and alpaca (HSA) skins in juvenile rainbow trout. Methods: A total of 450 fishes were randomly distributed in nine digestibility tanks, with 60.0 ± 1.32 g of initial weight and 6.4 kg/m3 of stocking density. The water quality parameters were as follows: pH 8.4, temperature 11.5 °C, and dissolved oxygen 6.2 mg/l. The skin hydrolysates were treated at 130 °C with 15 psi pressure for 120 min. Fish were fed a reference diet and an experimental diet containing 70% reference diet and 30% skin hydrolysate. The ingredients of the diets were mixed and then extruded at 95 °C with 4-mm diameter (Extruder Khal® EE800). The ADC was determined by the indirect method using insoluble ash as a non-digestible marker. Results: The ADC in HSS and HSA was similar for dry matter (67.7 vs 69.1%), organic matter (66.9 vs 68.2%), crude protein (70.4 vs 70.1%), and digestible energy (3.35 vs 3.24 Mcal/kg DM), but crude fat values were different (12.3 vs 48.0%; p < 0.001, respectively). Conclusion: The hydrolyzed sheep and alpaca skins had a high content of macronutrients with an acceptable apparent digestibility of nutrients, making them a viable alternative to improve the nutritive value of more economical feeds for rainbow trout feed.

#Nutrient digestibility #Skin hydrolysates #Digestible energy #Rainbow trout

참고문헌 (39)

참고문헌 신청

Association of Official of Analytical Chemists / 2011 / Official methods of analysis / Association of Official Analytical Chemists

National Research Council / 2011 / Nutrient requirements of fish and shrimp / The National Academies Press :392

Ministerio de la Producción / Perú. Anuario Estadístico Pesquero y Acuícola 2017

ADELIZI / 1998 / Evaluation of fish-meal free diets for rainbow trout, Oncorhynchus mykiss / Aquaculture Nutrition 4(4):255~262

J. L. Atkinson / 1984 / Evaluation of Acid-Insoluble Ash as an Indicator of Feed Digestibility in Rainbow Trout ( Salmo gairdneri ) / Canadian Journal of Fisheries and Aquatic Sciences 41(9):1384~1386

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