An economic analysis of hard clam (Meretrix meretrix) farmer polyculture with milkfish (Chanos chanos), silver sea bream (Rhabdosargus sarba), and shrimps at different hard clam stocking densities: a case study of Yunlin County, Taiwan

Yeh, Chun-Yuan; Huang, Jung-Fu; Lee, Jie‐Min; Schafferer, Christian

doi:10.1007/s10499-016-0094-x

Cited by 6 publications

(13 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This approach illustrates the scope of labor input management and explains the practice of excessive fry use. This finding coincides with prior research concluding that labor and fry of high‐density stockings have relatively higher substitutability (Yeh et al, 2017).…”

Section: Discussionsupporting

confidence: 92%

“…The findings of this study show that the specific product scale efficiency value of high‐density stocking of small or large milkfish fry is larger than 1 and statistically significant, implying that the production of the high‐density stocking with small or large milkfish has scale efficiency. As such, farmers can reduce the average cost of culture by expanding the milkfish production scale (Dey, Paraguas, Bimbao, & Regaspi, 2000; Golez, 1995; Nunoo, Asamoah, & Osei‐Asare, 2014; Reddy, Reddy, Sontakki, & Prakash, 2008; Tho, Vromant, Hung, & Hens, 2008; Yeh, Huang, Lee, & Schafferer, 2017). This result coincides with prior findings that show that scale efficiency can be achieved by expanding the production scale.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

A production economic analysis of different stocking density and fry size combinations of milkfish, Chanos chanos, farming in Taiwan

Lee¹,

Lü

Lee

et al. 2021

J World Aquaculture Soc

Self Cite

View full text Add to dashboard Cite

Milkfish, Chanos chanos, is often cultured with white shrimp, Penaeus indicus, to maintain ecological stability and increase profits. This study uses the outputs and cost data of 169 milkfish farmers in Taiwan for the years 2018 and 2019 and applies translog cost function modeling to analyze the production scale economy and input-input demand combinations of two stocking densities (<10,000, ≥10,000 fry/ha) and two fry stocking sizes (2-3 in. and ≥4 in.). The study found that high-density stocking (≥10,000 fry/ha) of small or large milkfish fry has economies of scale overall. Thus, the average culture cost may be reduced by expanding the scale of milkfish production. High-density stocking of small fry exhibits a comparatively higher own-price elasticity of fry. As such, farmers are sensitive to fry price variations. The study also found that labor and capital exhibit

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

A production economic analysis of different stocking density and fry size combinations of milkfish, Chanos chanos, farming in Taiwan

Lee¹,

Lü

Lee

et al. 2021

J World Aquaculture Soc

Self Cite

View full text Add to dashboard Cite

show abstract

“…This study is the first of its kind to investigate the diversity of invertebrate prey in the diet of catfish using DNA barcodes. The economically important clams (Meritxix meritrix ) (Yeh et al, 2016;Desrita et al, 2019) and mussel (Perna viridis) (Sulvina et al, 2020) found in the diet of A. maculatus in this study is of concern, as local populations were known to depend on these resources for food. Since accurate identification of macro-benthic invertebrates from benthophagous fish could facilitate the assessment of human impact on the ecosystem (Tupinambás et al, 2015), further studies could be directed toward a detailed picture of trophic levels in DNA barcoding based gut analysis of other catfish and fin fish species inhabiting Vellar estuary (Khan et al, 2011;Sakthivel et al, 2012).…”

Section: Discussionmentioning

confidence: 92%

Variability in the diet diversity of catfish highlighted through DNA barcoding

PrasannaKumar

Iyyapparajanarasimapallavan

Rahman³

et al. 2020

Preprint

View full text Add to dashboard Cite

Identification and quantification of fish diet diversity was the first step in understanding the food web dynamics and ecosystem energetics, where the contribution of DNA barcoding technique has been important. We used DNA barcoding to identify the stomach contents of a euryhaline, benthophagous catfish Ariius maculatus. From 40 catfish stomach items sampled in two different seasons, we barcoded 67 prey items of chordates and macro-invertebrates identified as belonging to 13 species in 4 major phyla (viz., Chordate, Arthropod, Annelida and Mollusca). It is important to note that the mollusc taxa (Meritrix meritrix and Perna viridis) and the species of fish (Stolephorus indicus) could not be found among the gut contents of A. maculatus sampled during the pre- and post-monsoon season, respectively. Among the chordate diets of A. maculatus, Eubleekeria splendens (23.5%) and Stolephorus indicus (23.5%) were the major prey taxa during pre-monsoon season. The hermit crabs forms the major constituents of both pre- and post-monsoon seasons, among invertebrate taxa. Polychaete, Capitella capitata (25.92%) was abundantly consumed invertebrates next to hermit crabs. We noticed that in pre-monsoon A. maculatus was more piscivorous than post-monsoon. As revealed through Kimura-2 parametric pair-wise distance analysis, the diet diversity was relatively higher in post-monsoon. The accumulation curve estimated 57 haplotypes within 14 barcoded species (including the host A. maculatus). Majority of haplotypes were found in Chordates (47.36%) followed by Arthropods (28.07%), Annelids (14.03%) and Mollusca (10.52%), respectively. This study also highlights that there is a growing concern about A. maculatus’s aggressive predation on commercially important stocks of fish and invertebrates. We will continue to expand the coverage of species barcoded in the reference database, which will become more significant as meta- and environmental DNA barcoding techniques become cheaper and prevalent.

show abstract

“…The input cost of temporary labor was higher when the survival rate was lower than 0.3, whereas the input cost of feed and other factors was higher when the survival rate was between 0.7 and 0.89. Moreover, Yeh, Huang, Lee, and Schafferer () conducted an economic analysis of the production of cultured hard clams in Yunlin County and found that high‐density stocking (≥1,500,000 individuals/ha) and low‐density stocking (<1,500,000 individuals/ha) both showed fixed returns to scale (RTS), indicating that the increase in the input factor does not lead to an increase in production. From the substitutability analysis of the use of input factors, labor and seeding and labor and feed at high‐density stocking were better substitutes, indicating that farmers would increase the inputs of seeding and feed to substitute for increasing wages.…”

Section: Introductionmentioning

confidence: 99%

“…Previous research on cultured hard clams in Taiwan has focused on growth rate, culture environment, and disease control, whereas more recent publications have included the economic aspects of cultured hard clams (Huang, Chou, Lee, & Cheng, ; Yeh et al, ). Huang et al (), for example, analyzed the cost efficiency of various culture areas, stocking densities, and polyculture types and focused on hard clam farmers in Yunlin County.…”

Section: Introductionmentioning

confidence: 99%

Impacts of culture survival rate on culture cost and input factors: Case study of the hard clam (Meretrix meretrix) culture in Yunlin County, Taiwan

Chang

Huang

Schafferer

et al. 2019

J World Aquaculture Soc

Self Cite

View full text Add to dashboard Cite

This study applies a translog cost function model to analyze the culture costs and the use of input factors among three groups of hard clam farmer households in Yunlin County, Taiwan, with different survival rates (low-intermediate, intermediate-high, and high). The study found that farmer household production in the three observed groups all exhibited economies of scale and could significantly expand the scale of production to lower the average cost. For farmer households with high survival rates, production cost could be reduced by 2.16% by a 10% increase in output.Moreover, the study shows that the survival rate-cost interaction values of farmer households in the intermediate-high and low-intermediate survival rate clusters were negative. Therefore, any increase in the survival rate could help lower the culture cost of farmer households. For low-intermediate farmers, the survival rate-cost interaction value was the most negative; any increase in the survival rate by 10% J World Aquacult Soc. 2020;51:139-158. wileyonlinelibrary.com/journal/jwas 139 would decrease the cost per hectare by NT$23,424. For high survival-rate households, seeding and capital were substitutes, and seeding and feed were complements. As such, farmers would reduce the use of seeding factors when increasing the use of capital and decreasing the use of feed. K E Y W O R D S economies of scale, elasticity of substitution, Meretrix meretrix, price and cost elasticities, survival rate, translog cost function 1 | INTRODUCTION The hard clam, Meretrix meretrix (L.), is an important commercial aquaculture species in Asia (Ho & Zheng, 1994; Jayabal & Kalyani, 1986). In Taiwan, it has the highest production output among all cultured shellfish species. The main cultured hard clam areas are mostly in counties and cities in western Taiwan, such as Changhua, Yunlin, Chiayi, and Tainan. In 2017, total hard clam production in Taiwan was approximately 52,062 m.t. Yunlin County has the highest production among all counties and cities in Taiwan, which reached 33,024 m.t. in 2017 and accounted for approximately 65% of the total production in Taiwan. The output value of the primarily family-run hard clam production in Yunlin County was close to NT$2.7 billion.In general, the cultured scale in Yunlin is relatively small, and its production cost often high. The size of culture ponds typically ranges from 1 to 3 ha with a unit production of approximately 11-15 m.t./ha, and a stocking density of approximately 1-1.6 million individuals/ha (Kuo, 2005). However, given the deterioration of the culture environment, climate change, and the high culture density, the production of cultured hard clams declined rapidly to 22,309 m.t. in 2016 with an output value of NT$1.1 billion. Moreover, a survey by Huang et al. (2018) shows that the survival rate of cultured hard clams in Yunlin County has declined from 70% to approximately 50% in recent years. Hard clam farmers have been advised to moderately reduce the stocking density of hard clams to enhance their survival and inc...

show abstract

An economic analysis of hard clam (Meretrix meretrix) farmer polyculture with milkfish (Chanos chanos), silver sea bream (Rhabdosargus sarba), and shrimps at different hard clam stocking densities: a case study of Yunlin County, Taiwan

Cited by 6 publications

References 24 publications

A production economic analysis of different stocking density and fry size combinations of milkfish, Chanos chanos, farming in Taiwan

A production economic analysis of different stocking density and fry size combinations of milkfish, Chanos chanos, farming in Taiwan

Variability in the diet diversity of catfish highlighted through DNA barcoding

Impacts of culture survival rate on culture cost and input factors: Case study of the hard clam (Meretrix meretrix) culture in Yunlin County, Taiwan

Contact Info

Product

Resources

About