Pond management strategies for small-scale aquaculture in northern Vietnam: fish production and economic performance

Pucher, Johannes; Mayrhofer, Richard; El-Matbouli, Mansour; Focken, Ulfert

doi:10.1007/s10499-014-9816-0

Cited by 25 publications

(26 citation statements)

References 41 publications

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“…Under both pond managements, the applied external feeds differed in amount, kind, and quality due to differences in the species composition of the fish stocked to the ponds and to variations in on-farm availability of feed resources in the research area as reported previously (Luu 2001;Steinbronn 2009;Pucher et al 2013Pucher et al , 2014bPucher et al , 2016. Under both pond managements, the same mass of external feed expressed as DM per pond area was applied.…”

Section: Discussion External Feed Inputsmentioning

confidence: 99%

“…Once a week, pond inputs were collected for chemical analysis. The feed samples were separated into palatable and non-palatable fractions based on observations at the ponds as to which feed fractions had been ingested by the fish after 24 h (as reported in Pucher et al 2014b). The unpalatable feed resources might degrade in the pond, and nutrients from this resource might enter fish via the natural food web.…”

Section: Sampling Designmentioning

confidence: 99%

“…On the one hand, pond aquaculture is integrated into the flow of organic resources within the farms through the use of leaf material, farming by-products, and manure from ruminants and pigs as external feeds and pond fertilizer inputs (Luu 2001;Steinbronn 2009;Pucher et al 2014bPucher et al , 2016. On the other hand, pond aquaculture is integrated into the water flow within the farming systems as the ponds are traditionally run as a flow-through system with constant water inflow and outflow from rice paddies and irrigation streams (Steinbronn 2009;Anyusheva et al 2012;Pucher et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Uptake of nitrogen from natural food into fish in differently managed polyculture ponds using 15N as tracer

Pucher

Focken²

2016

Aquacult Int

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Food security in Asia depends significantly on small-scale pond aquaculture in which fish feed on external feeds and natural food resources. Little is known about the assimilation of natural food resources into fish. In order to elucidate the food web and nitrogen flows in a traditionally and a semi-intensively managed pond in Vietnam, d 13 C and d 15 N in pond inputs and fish were measured before and after the application of inorganic 15 N at 1.1 and 0.4 % of total nitrogen. The applied 15 N was traced through the biomass of stocked fish over 30 days. Under traditional management, grass carp was the dominant species in number and biomass. After 30 days, grass carp assimilated 1.2 % of the applied tracer through natural food resources. Filter feeders assimilated only 0.1-0.3 % of the tracer after 30 days because of the limited productivity in the traditionally managed pond. Nile tilapia showed the highest uptake rates over the 30 days, which demonstrated their ability to feed on a variety of natural food resources. In total, 2.6 % of the applied 15 N was assimilated into fish biomass after 30 days. Under semi-intensive management, common carp was the main species numerically and assimilated 1.8 % of the tracer after 30 days. Grass carp was stocked at lower density, but had the highest biomass by the time of the experiment. Grass carp assimilated 0.2 % of the applied tracer suggesting a low contribution of natural food resources to its nutrition. Silver carp benefited most from the higher natural food resources. In total, 4.1 % of applied 15 N was assimilated into fish biomass after 30 days. Traditional small-scale aquaculture of a grass carp-dominated polyculture has a lower assimilation efficiency of applied fertilizers into fish biomass than a common carp-dominated polyculture under semi-intensive management.

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Section: Discussion External Feed Inputsmentioning

confidence: 99%

Section: Sampling Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Uptake of nitrogen from natural food into fish in differently managed polyculture ponds using 15N as tracer

Pucher

Focken²

2016

Aquacult Int

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“…Di beberapa negara, penggunaan sumber protein alternatif yang murah dan tersedia secara lokal sebagai pakan telah dilakukan, seperti di Kenya (Muchiri et al, 2015), Ghana (Obirikorang et al, 2015), Nigeria (Solomon & Alasa, 2017), Thailand (Somsueb, 1993), dan Vietnam (Pucher et al, 2015).…”

Section: Pemanfaatan Bahan Baku Lokal DIunclassified

“…Sama halnya dengan tepung ikan, pemilihan bahan baku lainnya seperti kacang koro, dedak halus, bungkil tahu, bungkit kelapa, dan rumput laut juga dipertimbangkan berdasarkan perhitungan ekonomis dan ketersediaannya di wilayah Kabupaten Klungkung. Hal ini sesuai dengan pernyataan dari Solomon & Alasa (2017) dan Pucher et al (2015) yang juga mengatakan bahwa penggunaan bahan baku alternatif yang tersedia secara lokal dapat menguntungkan pembudidaya melalui adanya subtitusi pakan komersil yang lebih mahal dengan pakan buatan yang harganya lebih murah.…”

Section: Hasil Dan Bahasan Komposisi Proksimat Bahan Baku Lokalunclassified

PEMANFAATAN BAHAN BAKU LOKAL DI KLUNGKUNG, BALI UNTUK PAKAN IKAN NILA BEST (Oreochromis niloticus)

Sunarno¹,

Kusmini²,

Prakoso³

2017

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ABSTRAKTujuan penelitian ini adalah untuk mengaplikasikan pemanfaatan bahan baku lokal di Klungkung, Bali sebagai pakan ikan nila BEST dibandingkan dengan pakan komersil. Pemilihan bahan baku lokal untuk memformulasikan pakan uji ditentukan berdasarkan hasil survei bahan baku yang mengandung nutrien terbaik sesuai dengan kebutuhan ikan nila dan harga yang relatif murah. Pakan uji yang diformulasikan mengandung protein 29%-30%. Performa pakan uji dibandingkan dengan pakan komersil dengan menggunakan uji-T. Setelah diaklimatisasi, benih ikan nila BEST (panjang total 5,7 ± 0,4 cm; bobot 3,1 ± 1,8 g) ditebar secara acak ke dalam enam buah hapa berukuran 2 m × 1 m × 1 m yang terletak di dalam kolam 100 m 2 dengan kepadatan 65 ekor/m 3 dan diberi pakan uji sebanyak 3% dari total bobot seluruh ikan uji per hari selama tiga bulan masa pemeliharaan. Hasil penelitian menunjukkan bahwa pertumbuhan ikan nila BEST tidak berbeda nyata antara pakan uji hasil formulasi dengan pakan komersil (P>0,05). Nilai FCR pakan komersil tidak berbeda nyata dibandingkan pakan formulasi. Berdasarkan hasil tersebut, keuntungan dengan menggunakan bahan baku lokal lebih tinggi dibandingkan dengan pakan komersil.

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Tropical Asian mega‐delta ponds: Important and threatened socio‐ecological systems

Moorhouse

Roberts

McGowan

et al. 2021

Geography and Environment

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Pond management strategies for small-scale aquaculture in northern Vietnam: fish production and economic performance

Cited by 25 publications

References 41 publications

Uptake of nitrogen from natural food into fish in differently managed polyculture ponds using 15N as tracer

Uptake of nitrogen from natural food into fish in differently managed polyculture ponds using 15N as tracer

PEMANFAATAN BAHAN BAKU LOKAL DI KLUNGKUNG, BALI UNTUK PAKAN IKAN NILA BEST (Oreochromis niloticus)

Tropical Asian mega‐delta ponds: Important and threatened socio‐ecological systems

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