Evaluation of duckweed (Lemna gibba) as feed for tilapia (Oreochromis niloticus × O. aureus) in a recirculating unit

Gaigher, I. G.; Porath, Dan; Granoth, Gila

doi:10.1016/0044-8486(84)90286-2

Cited by 36 publications

(21 citation statements)

References 6 publications

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“…Mean daily intake of aquatic plants (0.79-2.26 g DW/100 g fish biomass per day) was within the range (0.67-4.17 g DW/100 g fish biomass per day) reported for ingestion of aquatic plants by adult tilapia (Gaigher et al, 1984;El-Sayed, 1992;Hassan and Edwards, 1992;Leonard et al, 1998). Increased food intake during the third experiment (2.26 g DW per 100 g fish biomass per day) resulted in more rapid food passage through the digestive tract of the fish (large pieces of undigested plants were found in the excreta) and a shorter time available for digestion and absorption of the food.…”

Section: Chemical Composition Of Plantsmentioning

confidence: 79%

Feeding selectivity and growth of Nile tilapia (Oreochromis niloticus L.) fed on temperate-zone aquatic macrophytes

Šetlíková¹,

Adámek²

2004

CZECH J ANIM SCI

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Feeding selectivity of Nile tilapia (Oreochromis niloticus L.) juveniles (9.3-20.9 g) to four aquatic macrophyte species and tilapia growth were studied in 4 consecutive experiments. Plant diet was provided to 8 tanks containing 20 fishes for 5 days. The fish were fed a carp diet between 4 experiments for 14 days. The consumption of 4 aquatic macrophyte species differed significantly [F(3,252) = 39.6; P < 10 -6 ]. Elodea canadensis was the most preferred plant (Chesson selectivity index = 0.50 ± 0.05, n = 4). Potamogeton pectinatus and Spirodela polyrhiza were consumed with about equal preference. Myriophyllum spicatum was the least preferred species. Elodea canadensis contained relatively more phosphorus, potassium and ash than the other three species. The daily plant dry weight intake ranged between 0.79 and 2.26% of body weight. The fish grew during the first two experiments (SGR = 2.54 and 3.18%/d, respectively), but lost weight during the 3rd and 4th experiments (SGR = -1.75 and -1.71%/d, respectively).

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Section: Chemical Composition Of Plantsmentioning

confidence: 79%

Feeding selectivity and growth of Nile tilapia (Oreochromis niloticus L.) fed on temperate-zone aquatic macrophytes

Šetlíková¹,

Adámek²

2004

CZECH J ANIM SCI

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“…The specifi c growth rates found in the present study are relatively higher than those found in other studies with tilapia. Gaigher et al (1984) obtained a specifi c growth rate ranging from 1.19 to 1.84% for tilapia fed on fresh duckweed and commercial feed. The reason for this difference could be the high water content of fresh duckweed, which might reduce diet intake and consequently reduce growth.…”

Section: Specifi C Growth Ratementioning

confidence: 99%

“…However, most growth studies evaluating fresh duckweed as a dietary item have shown low weigh gain results (Gaigher et al, 1984;Hasan and Edwards, Dried duckweed as an alternative dietary source for tilapia 1992). Gaigher et al (1984) evaluated the use of fresh duckweeds as feed for tilapia in a water recirculating unit and observed that fi sh fed only on duckweed presented lower weight gain. According to these authors, fresh duckweed intake was limited due to its high moisture content (96%) and the presence of air pockets in its leaves, which are used for fl otation.…”

Section: Duckweed Nutritional Contentmentioning

confidence: 99%

Dried duckweed and commercial feed promote adequate growth performance of tilapia fingerlings

et al. 2008

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The present study evaluated Nile tilapia when fed on dried duckweed in combination with commercial feed, aiming at reducing production costs. Three diets, which consisted of commercial feed (40% crude protein), dried duckweed or a combination of commercial feed and dried duckweed were fed to triplicate groups of 20 tilapia (Oreochromis niloticus) fi ngerlings. Fish weighing 3.2 ± 0.94g were stocked in nine 1-m 3 net cages and fed twice a day for 50 days. The fi nal average weights of fi ngerlings fed commercial feed (21.67g) and 50% feed + 50% dried duckweed (19.53g) were not different (p<0.05). Likewise, the specifi c growth rate did not differ between fi sh receiving these dietary treatments. Weight gain decreased as water temperature decreased along the experimental period, increasing feed conversion mainly for fi ngerlings fed on dried duckweed only. Also, when fed alone dried duckweed promoted the lowest weight gain and specifi c growth rate. It was confi rmed that dried duckweed can replace 50% (1:1 dry weight) tilapia fi ngerling 40% crude protein feed for a period of at least 50 days, without reducing growth. Key words: alternative dietary source, duckweed, lemna, tilapia ResumoDesempenho de alevinos de tilapia nilótica alimentados com uma combinação de lemnas secas e ração comercial. O presente estudo avaliou a utilização de ração comercial e lemna seca no cultivo de alevinos de tilápias nilóticas com o objetivo de reduzir os custos de produção. Três dietas representadas por lemna seca, ração comercial (40% proteína bruta) e uma combinação de lemna seca e ração comercial foram fornecidas a um grupo de 20 alevinos de tilápia (Oreochromis niloticus) em triplicata. Peixes com peso médio 3,2 ± 0,94 g foram estocados em nove tanques-rede com volume de 1-m 3 e alimentados duas vezes ao dia durante um período de 50 dias. O peso médio fi nal dos alevinos alimentados com ração comercial (21,67 g) e 50% ração + 50% lemna seca (19,53 g) não diferiram estatisticamente (p<0,05). Paralelamente, os peixes pertencentes aos mesmos tratamentos não apresentaram diferença signifi cativa no crescimento específi co. O ganho em peso foi menor em temperaturas mais baixas ao longo do período experimental, causando um aumento signifi cativo na conversão alimentar principalmente dos alevinos alimentados apenas com lemna seca. Além disso, a dieta composta apenas de lemna seca proporcionou o menor ganho em peso e taxa de crescimento específi co. Através dos resultados obtidos, conclui-se que a lemna seca pode substituir até 50% (matéria seca 1:1) da ração comercial (40% proteína bruta) utilizada na produção de alevinos de tilápia por um período de 50 dias, sem apresentar redução no crescimento. Unitermos: fontes alternativas de alimento, lemnáceas, tilápias nilóticas

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“…The following data should be pointcd out: a medium "behaviour" of soy-bcan meal Viola and Arieli, 1983~); good results with sunflo\vcr meal, which do not prcscnt any known antinutritive factors in spits of a high cellulose content ; the medium results obtained with cotton secd meal (Jauncey and Ross, 1982;Ojekwu and Ejike, 1984), gossypol not being considered as the negative factor (Robinson et al, 1983). The utilization of whole plants such as Lemma (Gaigher et al, 1983;Tabthipwon, 1985) and Leucaena (Pantastico and Baldia, 1979;, gives contradictory results, but encouraging data are the positive results which where recorded by Ramos-Henao and Corredor, 1980, when they fed T. rendalli with Alocasia miccorhiza (tests in ponds).…”

Section: Protein Sourcesmentioning

confidence: 80%

Practical considerations on the protein nutrition and feeding of tilapia

Luquet¹

1989

Aquat. Living Resour.

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IJVR~l, Labora!oire d'lfidrobiologie, Ill' no 7 q , 9797 Kourou, Gtqane fran (aise.Rccçivcd S c p t e m h 2, I@; acceptecl Jariuary 9, I&. Abstract RésuméLuquet P. Aquat. Licing Resour., 1989, 2, 99-IW.Reliable data on tilapia nutrition and feeding are searce. In the best documented field, that of protein requirement, current data show good agreement with available information on coldwater and warmwater fishes. Various feedstuffs have been used to satisfy the protein needs, but the effects of variations of their quality have not been sufficiently studied. The main problem lies in the assessment of the effects of natural food in open rearing structures; thus there are some discrepancies with the results obtained in laboratory. More insight on in situ nutrition of pond fish, as well as the management of the feedstuffs and feeding practices is needed.

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Evaluation of duckweed (Lemna gibba) as feed for tilapia (Oreochromis niloticus × O. aureus) in a recirculating unit

Cited by 36 publications

References 6 publications

Feeding selectivity and growth of Nile tilapia (Oreochromis niloticus L.) fed on temperate-zone aquatic macrophytes

Feeding selectivity and growth of Nile tilapia (Oreochromis niloticus L.) fed on temperate-zone aquatic macrophytes

Dried duckweed and commercial feed promote adequate growth performance of tilapia fingerlings

Practical considerations on the protein nutrition and feeding of tilapia

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