Stable isotope analysis to quantify contributions of supplementary feed in Nile Tilapia Oreochromis niloticus (GIFT strain) aquaculture

Simple item page
dc.contributor.authorNarimbi, Jen_AU
dc.contributor.authorMazumder, Den_AU
dc.contributor.authorSammut, Jen_AU
dc.date.accessioned2021-08-24T01:56:58Zen_AU
dc.date.available2021-08-24T01:56:58Zen_AU
dc.date.issued2018-03-12en_AU
dc.date.statistics2021-08-19en_AU
dc.description.abstractNile tilapia (Oreochromis niloticus) is currently one of the most farmed freshwater fish and contributes significantly to total global aquaculture production. The genetically improved strain of O. niloticus (GIFT) was introduced to Papua New Guinea (PNG) in 1999 to improve food and income security. The high cost and low availability of commercial fish feed hinder the growth of GIFT farming in PNG. Stable carbon and nitrogen isotopes were used to determine the role of supplementary and natural food sources in the diet of GIFT in pond-based aquaculture. Two treatments were used: treatment 1 was daily feeding, and treatment 2 was weekly feeding, each with three replicates. Isotopic analysis of muscle tissue and all potential food sources showed that pellet feed contributed 7% to the growth of GIFT in daily-fed ponds and 33% in the weekly-fed ponds. Highly enriched δ15N values for chicken manure, compared to depleted values for GIFT and other natural food sources in both treatments, clearly indicate insignificant contributions of this input to production. After 90 days of cultivation, the average final body weight of GIFT receiving daily feed inputs was 134 g (average 19 cm), while for weekly-fed it was 92 g (17 cm). The feed conversion ratio (FCR) was poor (6.4:1) in the daily-fed GIFT ponds compared to a better, and preferable, FCR (1:1) in the weekly-fed ponds. The findings of this study show that pelleted feed was not the major contributor to the growth of GIFT. Genetically improved farmed tilapia aquaculture should focus on enhancing natural food availability for fish production. © 2018 John Wiley & Sons, Inc.en_AU
dc.identifier.citationNarimbi, J., Mazumder, D., & Sammut, J. (2018). Stable isotope analysis to quantify contributions of supplementary feed in Nile Tilapia Oreochromis niloticus (GIFT strain) aquaculture. Aquaculture Research, 49(5), 1866-1874. doi:10.1111/are.13642en_AU
dc.identifier.issn1355-557Xen_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitleAquaculture Researchen_AU
dc.identifier.pagination1866-1874en_AU
dc.identifier.urihttps://doi.org/10.1111/are.13642en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11435en_AU
dc.identifier.volume49en_AU
dc.language.isoenen_AU
dc.publisherJohn Wiley & Sons, Inc.en_AU
dc.subjectStable isotopesen_AU
dc.subjectAquacultureen_AU
dc.subjectFishesen_AU
dc.subjectPapua New Guineaen_AU
dc.subjectFisheriesen_AU
dc.subjectStable isotopesen_AU
dc.subjectCarbon isotopesen_AU
dc.subjectGeneticsen_AU
dc.subjectPelletsen_AU
dc.titleStable isotope analysis to quantify contributions of supplementary feed in Nile Tilapia Oreochromis niloticus (GIFT strain) aquacultureen_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Journal Articles