Economic profitability of tilapia farming in China

Yuan, Yuan; Yongming, Yuan; Dai, Yunyun; Gong, Yunchong

doi:10.1007/s10499-017-0111-8

Cited by 78 publications

(47 citation statements)

References 20 publications

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“…Farm‐level maximum likelihood estimates revealed that the coefficients of fish feed (68%), rent (23%) and electricity (14%) had a significant influence on tilapia production. Feed is the main component of operating costs (Iliyasu et al, ; Yuan, Yuan, Dai, & Gong, ), and efficient management of feed during production can greatly improve technical efficiency among tilapia producers, confirming the results obtained by Iinuma et al (). Pond rent is increasing year by year across the five provinces examined, which has an important effect on technical efficiency, confirming the results obtained by Yin et al ().…”

Section: Resultssupporting

confidence: 53%

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Technical efficiency of different farm sizes for tilapia farming in China

et al. 2019

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China is the world's largest tilapia producer. This study uses the stochastic frontier function in the Cobb–Douglas model to evaluate a production frontier for tilapia aquaculture and analyses the relationship between farm size and production efficiency in China. A random sample of 300 tilapia farmers was surveyed in the main tilapia‐producing areas to study their economic efficiencies. The percentage distribution of tilapia farm technical efficiency was determined, with an average efficiency of 79%, which showed that the sample tilapia farmers operate at 21% below the production frontier and hence that they still have a chance to achieve targeted yields. The technical efficiencies of two categories (≤1 ha and >1 ha) were 78.82% and 79.27% respectively. A second‐stage analysis investigated the relationship between farm size and technical efficiency and showed a positive relationship between farm size and production efficiency based on the ordinary least‐squares model. The optimal farm size was found to be 7.50 ha. This study proposes strategies such as enlarging the farming scale moderately, thereby achieving the advantage of economies of scale, and enhancing the competitiveness of the tilapia industry in China.

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Section: Resultssupporting

confidence: 53%

“…The results of this test can also be seen in Table . Yuan et al () found that large ponds had the highest yields. This implies that larger farms perform better than smaller ones.…”

Section: Resultsmentioning

confidence: 99%

Technical efficiency of different farm sizes for tilapia farming in China

et al. 2019

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“…Tilapia is an important commercial fish in China, which is euryhaline fish species and it is the second most important fish after carps in aquaculture [14]. Owing to ease of aquaculture, marketability and stable market prices, the production of tilapia has quadrupled over the past decade [15], and which is promoted and farmed in more than 100 countries and regions [16]. Owing to its importance in tropical and subtropical aquaculture and its extreme euryhaline ability, tilapia has received a high level of scientific interest and is one of the most popular model species for research on fish osmoregulation [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Transcriptomic response to three osmotic stresses in gills of hybrid tilapia (Oreochromis mossambicus female × O. urolepis hornorum male)

Zhu

et al. 2020

BMC Genomics

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Background: Osmotic stress is a widespread phenomenon in aquatic animal. The ability to cope with salinity stress and alkaline stress is quite important for the survival of aquatic species under natural conditions. Tilapia is an important commercial euryhaline fish species. What's more tilapia is a good experimental material for osmotic stress regulation research, but the molecular regulation mechanism underlying different osmotic pressure of tilapia is still unexplored. Results: To elucidate the osmoregulation strategy behind its hyper salinity, alkalinity and salinity-alkalinity stress of tilapia, the transcriptomes of gills in hybrid tilapia (Oreochromis mossambicus ♀ × O. urolepis hornorum ♂) under salinity stress (S: 25‰), alkalinity stress(A: 4‰) and salinity-alkalinity stress (SA: S: 15‰, A: 4‰) were sequenced using deep-sequencing platform Illumina/HiSeq-2000 and differential expression genes (DEGs) were identified. A total of 1958, 1472 and 1315 upregulated and 1824, 1940 and 1735 downregulated genes (P-value < 0.05) were identified in the salt stress, alkali stress and saline-alkali stress groups, respectively, compared with those in the control group. Furthermore, Kyoto Encyclopedia of Genes and Genomes pathway analyses were conducted in the significant different expression genes. In all significant DEGs, some of the typical genes involved in osmoregulation, including carbonic anhydrase (CA), calcium/calmodulin-dependent protein kinase (CaM kinase) II (CAMK2), aquaporin-1(AQP1), sodium bicarbonate cotransporter (SLC4A4/NBC1), chloride channel 2(CLCN2), sodium/ potassium/chloride transporter (SLC12A2 / NKCC1) and other osmoregulation genes were also identified. RNA-seq results were validated with quantitative real-time PCR (qPCR), the 17 random selected genes showed a consistent direction in both RNA-Seq and qPCR analysis, demonstrated that the results of RNA-seq were reliable. Conclusions:The present results would be helpful to elucidate the osmoregulation mechanism of aquatic animals adapting to saline-alkali challenge. This study provides a global overview of gene expression patterns and pathways that related to osmoregulation in hybrid tilapia, and could contribute to a better understanding of the molecular regulation mechanism in different osmotic stresses.

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“…Tilapia is a high protein containing, rapid growth, well‐adapted fish species that has been farmed in more than 100 countries and regions (El‐Sayed, ). In China, tilapia culture is a promising aquaculture business, over 30 provinces and cities grow tilapia, and the total tilapia farming area was about 133,000 ha (Yuan, Yuan, Dai, & Gong, ). However, with the rapid development of the tilapia culture industry, various bacterial diseases frequently outbreak due to intensified culture and high stocking density conditions of intensive farming.…”

Section: Introductionmentioning

confidence: 99%

Aeromonas shuberti as a cause of multi‐organ necrosis in internal organs of Nile tilapia, Oreochromis niloticus

Liu

Chang

Zhang

et al. 2018

Journal of Fish Diseases

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A disease with white spots in internal organs of Nile tilapia occurred in Zhanjiang, southern China. Multiple, white nodules, 0.8-2.2 mm in diameter, were scattered throughout the liver, spleen and kidney of diseased fish. Signs of nodules reproduced after artificial infection with the isolated strain. Isolated bacteria were Gram-negative, facultative anaerobic, motile, short rod-shaped, with a length of 1.2-2.2 μm. Morphological and biochemical tests, as well as phylogenetic analysis, all strongly indicated that the isolate from tilapia is identical to Aeromonas schubertii (A. schubertii) which temporary named LF1708 strain. Antibiotic sensitivity assays showed the LF1708 is sensitive to 24 of 27 tested antibiotics. Pathogenicity test revealed that the isolate at the dose of 3.75 × 10 CFU/g killed 100% of experimental tilapia within 2 days and the dose of 1 × 10 CFU/g killed 100% of experimental zebrafish within 1 day. Histopathology of diseased tilapia infected with A. schubertii showed numerous necrotic lesions widely distributed in spleen, liver and kidney, and infiltration with a large number of bacteria. To our knowledge, this was the first report that associated A. schubertii with mortality in tilapia.

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Economic profitability of tilapia farming in China

Cited by 78 publications

References 20 publications

Technical efficiency of different farm sizes for tilapia farming in China

Technical efficiency of different farm sizes for tilapia farming in China

Transcriptomic response to three osmotic stresses in gills of hybrid tilapia (Oreochromis mossambicus female × O. urolepis hornorum male)

Aeromonas shuberti as a cause of multi‐organ necrosis in internal organs of Nile tilapia, Oreochromis niloticus

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