COVID-19 impacts on United States crawfish. (Special Issue: COVID-19 impacts on selected commodities.)

This research determines the impacts of COVID-19 US on crawfish production and consumption for 2020 and 2021 using an Equilibrium Displacement Model. In the US, crawfish is one of the seafood commodities where most production is consumed by domestic consumers (7% of domestic consumption is from imports). Crawfish and rice are complementary. Therefore, the impacts of COVID-19 on crawfish consumption simultaneously influence rice production and crawfish producers and consumers. In the first year of COVID-19 (2020), the reduction in crawfish retail demand caused negative effects on final consumers and producers. However, crawfish consumption recovered significantly in the second year (2021), which could compensate for the loss in 2020. Overall, consumer and producer gains ranged from $549 to $626 million if the COVID-19 pandemic only impacted retail consumption. However, in 2021, the increase in production costs due to higher oil/diesel prices and other input prices caused the farm supply to decrease. As a result, total welfare gains ranged from $200 to $228 million. If the demand in 2021 did not increase, but the crawfish farm supply decreased, consumer and producer losses ranged from $929 to $1045 million. Overall, the total effects of COVID-19 on consumers and producers for 2020 and 2021 depend on its effects in 2021. If the demand in 2021 increased following the decrease in farm supply, consumers and producers would benefit from the shocks of COVID-19 due to higher post-COVID-19 demand.

Special Issue: COVID-19 impacts on selected commodities. (Special Issue: COVID-19 impacts on selected commodities.)

This special issue consists of seven articles examining the impacts of the COVID-19 pandemic on the markets of selected commodities, including: seafood, lumber, crawfish, cattle/beef, fruits and vegetables in the USA, cotton and garments in Bangladesh, and fuel oil globally.

Comparative analysis of shrimp production in Ecuador in the 2010-2020 period

Efficiency in shrimp farming is due to the use of an extensive system that includes fewer larvae per pool, which increases productivity, improves financial results, and even the environmental impacts generated during these operations. The objective of this study was to identify the factors that affect supply in the Ecuadorian shrimp sector. To this end, some statistical techniques such as linear regression and hypothesis testing were used. A bibliographic study was carried out regarding shrimp production in Ecuador, taking as reference the data provided by the National Chamber of Aquaculture and public control entities and reviewing the unprecedented impact on the current COVID19 sanitary crisis and the reduction of shrimp demand affecting Ecuador's income. Finally, it was observed that the research variables considered directly impact crustacean production, and a mathematical model was established.

Helping Louisiana's shrimp industry during the pandemic

This article reports on the inclusion of wild-caught shrimp in the USDA Agricultural Marketing Service (AMS) program to help Louisiana's shrimp industry during the COVID-19 pandemic. As a result of a quick Sea Grant mobilization, $50 million in cash from USDA was infused into the shrimping industry, and 7.6 million pounds of Louisiana shrimp were taken out of inventory and distributed nationwide.

Serum miR-101, HSP-70 and IL-1 beta in gastric cancer patients with hp infection correlation between expression level and tmor proliferation and invasion

Objective: To investigate correlation between expression level and tumor proliferation and invasiveness of the serum miR-101, heat shock protein-70 (HSP-70) and interleukin-1beta (Interleukin-1beta, IL-1beta) in patients with gastric cancer complicated by Helicobacter pylori (Hp) infection.

Development strategy of crayfish industry under COVID-19 epidemic taking Jingzhou city in Hubei Province as an example

The pandemic situation of COVID-19 has seriously influenced the whole chain of crayfish industry--aquaculture, logistic, processing, and service in Jingzhou. In the short term, each link of the industry was difficult to get well completely, the relevant enterprises and new types of agricultural businesses lack of confidence. After undergoing rapid development for many years, it presented some new changes under the epidemic influence: firstly, the cultivation area tend to be stable and rational, and a large scale of crayfish aquaculture was transformed to high quality aquaculture;secondly, the storage and deep processing industry would be developed rapidly;thirdly, the online consumption mode would become widely accepted. Based on our investigation, some suggestions were put forward for crayfish industry to resume production and to promote the sustainable-healthy development. The first, crayfish aquaculture in paddy field should be changed from high production to high quality;the second, processing and server-side should develop new products and new marketing models;the third, the industry management department should strengthen guidance and supervision, local governments at all levels should strongly support from policy, finance and publicity, so that jointly guide the industry upgrading and create regional brands.

Socio-economic progress of shrimp farming in Punjab

COVID-19 pandemic devastated the world with unprecedented economic crisis, leaving everyone confused and apprehended, including the livestock sector. As a resilience measure, shrimp farmers of Punjab were advised some remedial adaptations. Expecting good results, socio-economic evaluation of shrimp farmers from 3 south west districts (Fazilka, Sri Muktsar Sahib and Mansa) of the state was carried out. With enthusiastic participation of young (56.7% 35 years of age) and educated (50% graduates) farmers, overall 86.6% of the farmers followed the advisories. The pandemic delayed stocking of ponds, however 66.7% of farmers harvested 6.5 to 8.75 t shrimp ha crop . -1 -1 Non-availability of water testing facility within approachable distance emerged as the major constraint (80%), while only 6.66% farmers each reported marketing and seed related problems. With culture period of 101-120 (40%) and >120 (36.7%) days, 66.7% farmers obtained feed conversion ratio <1.2. Further, 43.3 and 36.7% farmers harvested shrimp with an average body weight of 31-35g and 26-30g, respectively and 100% farmers marketed shrimp at the farm site @ Rs. 301-400 (53.3%) and >Rs. 400/- (40%) kg, corresponding to net profit of >12.5 lakh -1 (60%) and 7.6-12.5 lakh (26.7%) ha . The adopted resilience plan helped the farmers to realize optimal economic returns from shrimp farming -1 in Punjab.

Aquaculture: an introductory text

This 4th edition covers issues associated with sustainable aquaculture development, culture systems, hatchery methods, nutrition and feeding of aquaculture species, reproductive strategies, harvesting, and many other topics. While its main focus is on the culture of fish, molluscs and crustaceans for food, the book also covers other forms of aquaculture, such as the production of seaweeds, recreational fish and ornamental species, as well as live foods, such as algae and rotifers that are used to feed larval shrimp and marine fish. Thoroughly updated and revised, this essential textbook now includes increased coverage of open-ocean cage culture and sea lice issues with salmon culture, coverage of the significant progress made in nutrition, including the move away from fishmeal as protein and fish oil as lipids in feed, information on biofloc technology uses, predictive impacts of climate change, probiotics, and the impact of COVID-19 on the aquaculture community, and updated aquaculture production statistics and lists of approved anaesthetics. Aquaculture remains one of the most rapidly growing agricultural disciplines, and this book remains an essential resource for all students of aquaculture and related disciplines.

Optimisation of feed margins: as COVID-19 presents a real crisis for the aquaculture industry, it could also induce improvements in shrimp farming

This article describes the economic impact of COVID-19 to the global aquaculture industry and possible mitigation procedures to improve the supply, breeding and genetics, farming techniques, feed formulation, production costs, marketing and prices. The results of studies regarding the beneficial effects of proteinases on the growth performance and nitrogen digestibility and excretion in fishes and shrimp are also presented.