《Aquaculture Economics & Management》2022年第26卷第3期目录及摘要

全文链接：

https://www.tandfonline.com/toc/uaqm20/26/3

Introduction

Seafood markets in transition

Hans-Martin Straume & Pratheesh O. Sudhakaran

Original Articles

The São Paulo wholesale seafood market: A study of fish prices in Brazil

Ruth Beatriz Mezzalira Pincinato, Atle Oglend, Renata Melon Barroso Bertolini & Andrea Elena Pizarro Muñoz

Clam aquaculture profitability under changing environmental risks

Jordan Moor, Andrew Ropicki & Taryn Garlock

Dynamics of price volatility spillover in the U.S. catfish market

Prasanna Surathkal, Madan M. Dey & Pratheesh Omana Sudhakaran

Production economic relationships in intensive U.S. catfish production systems

Shraddha Hegde, Ganesh Kumar, Carole Engle, Jimmy Avery, Suja Aarattuthodi, Jeff Johnson & Jonathan van Senten

Consumers’ willingness-to-pay for newly developed U.S. farm-raised convenient catfish products: A consumer-based survey study

Kamal Gosh, Uttam Deb & Madan M. Dey

The São Paulo wholesale seafood market: A study of fish prices in Brazil

Ruth Beatriz Mezzalira Pincinato    Atle Oglend    Renata Melon Barroso Bertolini    Andrea Elena Pizarro Muñoz

Abstract：We analyze fish pricing in the São Paulo wholesale market, the second largest seafood market in South America. Quantitative price analysis is complemented by interviews with participants in the value chain to answer how the multitude of fish products supplied in this market are related and the challenges facing future growth. The results reveal a clear separate pricing of domestically produced fishery species (whitefish and pelagics) from the internationally traded aquaculture species (tilapia and salmon). Tilapia and salmon are uniquely priced, less volatile and more persistent with a price dynamic more akin to local terrestrial meats. Fishery prices show large month-by-month fluctuations and compete more with each other. Participants in the different levels of the value chain corroborate the uniqueness of salmon and state a preference for stable availability and low prices, with less concern about the specific sourcing of fish (aquaculture/fisher, or domestic/imported).

Clam aquaculture profitability under changing environmental risks

Jordan Moor    Andrew Ropicki    Taryn Garlock

Abstract：As filter feeders, mollusks’ growth is completely reliant on the natural environment. This leaves clam aquaculture, and more generally molluskan aquaculture, highly susceptible to environmental risks such as harmful algal blooms (HABs) and low salinity events. As marine environments change, whether due to climatic or nutrient related variations, there may be new risk combinations that farmers have yet to encounter. To analyze the financial effects of environmental risks on clam farmers in the Gulf of Mexico, we conducted a Monte–Carlo experiment, varying risk combinations and correlations among scenarios. Simultaneous stressors showed a significant impact on individual firms, decreasing average profit by 71% and internal rate of return (IRR) by 83% when compared to best case baseline scenarios without environmental risk, indicating a potential need for risk mitigation strategies. While our analysis focuses on Florida Gulf of Mexico clam farmers, the model presented is applicable to molluskan aquaculture globally.

Dynamics of price volatility spillover in the U.S. catfish market

Prasanna Surathkal    Madan M. Dey    Pratheesh Omana Sudhakaran

Abstract：The U.S. catfish aquaculture industry is arguably one of the earliest aquaculture segments in the world to industrialize, and a pioneer in demonstrating the benefits of innovation-driven aquaculture supply chain development over wild-harvested fisheries. However, the industry substantially contracted through the 2003–2013 period. High and volatile feed prices, volatile farm prices, a rapid surge in low-priced imports, and a strict regulatory compliance burden on a maturing industry are thought to be some of the major factors causing this decline. We analyze the price volatility spillovers in the U.S. catfish industry and the related feed/feed ingredient markets. Our empirical model is the multivariate generalized autoregressive conditional heteroscedasticity (GARCH) model allowing for cross-market and own-market impacts from shocks and volatilities in prices. Our results indicate bidirectional spillovers among catfish market prices and most of the feed ingredient prices.

Production economic relationships in intensive U.S. catfish production systems

Shraddha Hegde    Ganesh Kumar    Carole Engle    Jimmy Avery    Suja Aarattuthodi    Jeff Johnson    Jonathan van Senten

Abstract：The U.S. catfish industry is evolving by adopting intensive farming practices such as intensively aerated ponds and split-pond systems. The functional relationship between fish yield and key production inputs in these intensive systems was analyzed based on commercial catfish production data from 143 pond observations (2010−2018). A Cobb-Douglas production function was employed for the intensively aerated ponds and a modified translog production function was used to define the production relationships in split ponds. Results indicated that the size of fingerlings at stocking, stocking density, aeration rate, feeding rate, survival, and harvest size of the fish were statistically significant variables influencing fish production in intensively aerated ponds. Initial fingerling stocking biomass (interaction of stocking size and stocking density), feed conversion ratio (FCR), feeding rate, and pond size were the most important variables influencing production in split-pond systems. Feed fed, as well as stocking biomass, were the significant variables found in both models. Both production functions indicated further scope for improvement in the use of inputs to increase production, especially in feed management.

Consumers’ willingness-to-pay for newly developed U.S. farm-raised convenient catfish products: A consumer-based survey study

Kamal Gosh    Uttam Deb    Madan M. Dey

Abstract：Accurately measuring willingness-to-pay (WTP) for newly developed food products is critical for academicians and marketing managers. This study measures consumers’ preference and WTP for five newly developed convenient (ready-to-cook) catfish products by surveying 128 participants from Arkansas and Florida. An ordered probit model was applied to survey data to investigate factors influencing consumers’ WTP. Results indicated that the surveyed participants preferred all the inspected products as their WTP was ranged between average and high. The significant variables affecting the participants’ WTP include product appearance, eagerness to buy, preference ranking, preferred form, and consumption pattern. The consumer’s WTP was significantly correlated with the participant’s gender, age, race, and for some groups, income.

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