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

Narimbi, Justin; Mazumder, Debashish; Sammut, Jesmond

doi:10.1111/are.13642

Cited by 23 publications

(10 citation statements)

References 56 publications

(88 reference statements)

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“…Small-scale piggeries and vegetable cropping also occur in the catchment of the farms, and urban activities in the nearby town of Kainantu, may also be sources of nutrients; however, their contribution to the nutrient budgets of the farms is likely to be negligible. Despite the use of chicken manure, a previous study has shown that this type of organic fertiliser does not influence the growth and δ 15 N of GIFT [11]. This indicates that the enrichment of δ 15 N in vegetable-fed GIFT in our study is not a result of fertiliser, rather, it likely represents a response to dietary preferences [55].…”

Section: Discussionmentioning

confidence: 48%

“…As for many farmed species, commercial fish feed pellets are widely considered the best option to increase GIFT farm productivity; however, only 10% of the small-scale fish farmers in PNG use commercial fish feed [ 10 ]. Whilst the nutritional needs of farmed tilapia can be met through a variety of natural food sources [ 11 ], a poor diet can negatively impact their growth and overall health [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

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Diet type influences the gut microbiome and nutrient assimilation of Genetically Improved Farmed Tilapia (Oreochromis niloticus)

et al. 2020

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Nile tilapia, Oreochromis niloticus is the third most commonly farmed finfish species in the world, accounting for nearly 5% of global aquaculture production. In the past few decades much of the success of this species has been attributed to the development and distribution of Genetically Improved Farmed Tilapia (GIFT). Despite the increasing availability of GIFT, the productivity of small-scale farming remains highly variable, particularly in developing nations. Commercial fish-feed pellets can increase fish farm productivity; however, many small-scale farmers rely on other means of feeding fish due to the high cost and limited availability of commercial fish feed pellets. Therefore, understanding how locally-sourced feeds affect the production of GIFT is an important step towards improving feeding practices, particularly for farmers with low financial capital. This study used stable isotope analysis (SIA) and 16S rRNA gene sequencing to compare the effects of a locally-sourced vegetablebased diet and commercial pellet-based diets on the relative condition, nutrient assimilation patterns and gastrointestinal microbiota of GIFT. GIFT fed a locally-sourced diet were smaller, and in a significantly poorer condition than those fed with commercial fish feeds. SIA showed no differences in dietary carbon between the two diets; however, δ 13 C, poor fish condition and the abundance of specific bacterial taxa (of such as Fusobacteria) were correlated. SIA revealed that GIFT fed locally-sourced diets that predominantly consisted of vegetables were significantly enriched in δ 15 N despite a perceived lack of dietary protein. This enrichment suggests that GIFT fed a locally-sourced diet may be supplementing their diet via cannibalism, a behaviour representative of poor farming practice. Overall this study highlights the need to increase the availability of suitable GIFT feeds in developing nations. The development a low-cost feed alternative could improve the success of small-scale GIFT farmers in PNG, increasing both food and income security within the region.

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Section: Discussionmentioning

confidence: 48%

Section: Introductionmentioning

confidence: 99%

Diet type influences the gut microbiome and nutrient assimilation of Genetically Improved Farmed Tilapia (Oreochromis niloticus)

et al. 2020

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“…In the last decades, studies in fish nutrition have incorporated the stable isotope analysis tool to assess the quantity and quality of food assimilation by fish in farming environments (Abimorad et al, 2017; Asano et al, 2010; Filbrun et al, 2013; Jomori et al, 2008; Narimbi et al, 2018), since the isotopic compositions of animal tissues resemble their diets (Ducatti, 2007; Franco et al, 2014). Given the similarity of the isotopic signal between fish fed with live and frozen zooplankton at the end of feed training, we can conclude it that there was a similar amount of these foods consumed by the fish, without preference for the way the zooplankton was supplied.…”

Section: Discussionmentioning

confidence: 99%

Frozen zooplankton is efficient as natural food during pirarucuArapaima gigasweaning

Lima

Rodrigues

Costa

2021

Aquaculture Research

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The commercial production of carnivorous fish depends on the feed training that can be made through the direct transition from natural food to inert food. As using live natural food requires care in production, alternative methods of using live food are necessary, such as freezing. Thus, the aim of this study was to evaluate the use of frozen zooplankton as an initial diet in the feed training of pirarucu Arapaima gigas juveniles. Three hundred and twenty pirarucu juveniles (13.94 ± 4.99 g) were submitted to weaning with two different initial diets (treatments): live zooplankton and frozen zooplankton. The co‐feeding period was 12 days, with a progressive increase in the amount of feed offered and a decrease in zooplankton every three days. At the end of the training, all fish were ready to be fed with commercial feed. There was no mortality in the experiment and no significant differences (p > 0.05) for weight, length, weight variation coefficient, specific growth rate, intestinal coefficient, hepatosomatic index, muscle layer thickness and height of the branched folds intestinal mucosa, moisture, crude protein and carcass energy for fish that received live or frozen zooplankton as a starter. Isotopic values of δ15 N and δ13C in the fish's muscle were similar (p > 0.05), reinforcing no feeding preference of the fish between the live or frozen zooplankton. The water quality was not influenced by the use of initial diet (p > 0.05). The frozen zooplankton can be used as initial food for pirarucu juveniles feed training, without impairing fish growth and survival.

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“…The study results pointed to a more sustainable feed management in the farming of Nile tilapia in net cages. In a study on the same tilapia species (GIFT strain), but grown in earthen ponds, Narimbi et al 86 applied carbon and nitrogen SIA to determine the role of supplementary feed and natural food sources. Isotopic values of tilapia muscle and potential food sources indicated that compound feed contributed from 7% to 33%, depending on feeding frequency, to the growth of fish.…”

Section: Natural Biota Versus Formulated Feedsmentioning

confidence: 99%

Isotopic techniques in aquaculture nutrition: State of the art and future perspectives

Gamboa‐Delgado

2021

Reviews in Aquaculture

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Aquaculture production systems resemble small, confined ecosystems existing in compartments. However, from the point of view of thermodynamics, living organisms are open systems that only thrive with a constant supply of energy from the outside. Nutrients and energy flow in a dynamic process of inputs, retentions and outputs.The integral study of key components such as the suitability of dietary items and the nutritional physiology of cultured organisms has opened new research areas that in turn have led to higher production outputs. Concomitant with the latter, the farming of emergent, alternative species has also been favoured by this nutritional research. A vast number of analytical techniques and monitoring methods have shed light on the nutritional performance of experimental diets and feeding regimes designed for aquatic organisms at different life stages and growing under a variety of production

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

Cited by 23 publications

References 56 publications

Diet type influences the gut microbiome and nutrient assimilation of Genetically Improved Farmed Tilapia (Oreochromis niloticus)

Diet type influences the gut microbiome and nutrient assimilation of Genetically Improved Farmed Tilapia (Oreochromis niloticus)

Frozen zooplankton is efficient as natural food during pirarucuArapaima gigasweaning

Isotopic techniques in aquaculture nutrition: State of the art and future perspectives

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