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Development of Organic fish feeds: Case study of poultry droppings and pig feces as replacement for soybean meal in practical diets for Nile tilapia, Oreochromis niloticus (L.)

George, Francisca O.A.; Nwaezeigwe, Franklin O.; Abdul, Waheed O. and Jegede, A. V. (2018) Development of Organic fish feeds: Case study of poultry droppings and pig feces as replacement for soybean meal in practical diets for Nile tilapia, Oreochromis niloticus (L.). In: Rahmann, Gerold; Olowe, Victor Idowu; Olabiyi, Timothy Ipoola; Azim, Khalid and Olugbenga, AdeOluwa (Eds.) Ecological and Organic Agriculture Strategies for Viable Continental and National Development in the Context of the African Union's Agenda 2063. Scientific Track Proceedings of the 4th African Organic Conference. November 5-8, 2018. Saly Portudal, Senegal, pp. 121-128.

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Summary

There have been persistent increases in the cost fish feeds and organic fish feeds are practically non-existent in Nigeria. This study was conducted to investigate the effects of replacement of soybean meal (SBM) with dried pig feces (DPF) and poultry droppings (PD) on growth performance, nutrient utilization and carcass composition of Oreochromis niloticus fingerlings. O. niloticus weighing 5.29 ± 0.02g and standard length 5.35 ± 0.07cm were fed seven iso-nitrogenous diets containing 40% crude protein in which the SBM protein was replaced with DPF and PD meals each at 0% (control diet, D7), 15% (Diets DPF1 and PD4), 30% (Diets DPF2 and PD5) and 45% (Diets DPF3 and PD6) levels for 12 weeks in plastic aquaria measuring 52 x 33 x 33 cm3 (Length x Breadth x Height). Each treatment was in triplicate. At the end of the feeding trial, data obtained were analyzed statistically using one-way analysis of variance; and means were separated using Duncan’s multiple range test, DMRT. Water quality parameters measured during the study period were within the range for tilapia production, except for dissolved oxygen. Weight gain of 11.0 ± 0.27g was highest in fish fed PD5, while PD4 had the lowest (6.99 ± 0.27 g); and was significantly different (p<0.05) from other diets. Feed conversion ratio of 1.79 in fish fed PD5 was not significantly different (p>0.05) from 1.81 and 1.83 recorded for fish fed D7 and PD6 respectively. Apparent net protein utilization was highest (62.57%) in fish fed PD5 and lowest (35.85%) with a significant differences (p<0.05) in fish fed diet PD4. Apparent protein digestibility was highest in fish fed PD5 (91.86%) and lowest in fish fed PD4 (78.98%). Percentage survival was similar (100%) in fish fed DPF3 and PD6 (93.33%) but was significantly higher (p<0.05) than values obtained in fish fed D7, DPF1, DPF2, PD4 and PD5 with an equal value of 90% respectively. This study revealed that poultry droppings could replace 30% of soybean meal in practical diets of O. niloticus without any adverse effects on growth and with concomitant reduction in aquaculture feed costs.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Organic aquaculture, organic fish feeds, animal wastes, Oreochromis niloticus
Subjects: Food systems > Food security, food quality and human health
Research affiliation: International Conferences > 2018: 4th African Organic Conference
Nigeria
ISBN:978-3-86576-190-3
Related Links:http://www.afronet.bio/
Deposited By: George, Prof. Francisca Olubunmi A.
ID Code:33177
Deposited On:26 Sep 2019 06:30
Last Modified:26 Sep 2019 06:30
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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