Assessing the Potential of Adenosine and L-Theanine as Metabolic Suppressants for Improving Shipping of the New Zealand Scampi (Metanephrops challengeri)

Live crustaceans, especially lobsters, crabs, and shrimp, fetch premium prices in many international seafood markets, especially in parts of Asia. To access these market opportunities, live crustaceans frequently need to be transported over long distances, which can involve prolonged air exposure re...

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Bibliographic Details
Published inAquaculture research Vol. 2024; pp. 1 - 9
Main Authors Willis, Jaime R., Jeffs, Andrew G., Heasman, Kevin, Hickey, Anthony J. R.
Format Journal Article
LanguageEnglish
Published Oxford Hindawi 23.01.2024
John Wiley & Sons, Inc
Hindawi Limited
Subjects
Adenosine
Air exposure
Ammonia
Animal welfare
Aquaculture
Aquatic crustaceans
Crustacea
Crustaceans
Decapoda
Deep sea
Down-regulation
Drug dosages
Fisheries
Glycogen
Glycogens
Heart beat
Heart rate
Laboratory animals
Lactate
Lobsters
Marine crustaceans
Metabolism
Metabolites
Metanephrops challengeri
Morbidity
Seafood
Seafoods
Shellfish
Shipping
Signal transduction
Temperature
Theanine
New Zealand
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Summary:Live crustaceans, especially lobsters, crabs, and shrimp, fetch premium prices in many international seafood markets, especially in parts of Asia. To access these market opportunities, live crustaceans frequently need to be transported over long distances, which can involve prolonged air exposure resulting in elevated stress and increased morbidity and mortality. Interventions which deliver metabolic suppression to live crustaceans during their transport have the potential to improve outcomes from live shipping. In this study, the administration of adenosine (Ado) and L-theanine (L-th) were assessed for metabolic suppression in the New Zealand scampi, Metanephrops challengeri, a deep sea lobster which is highly prized as seafood, and with excellent prospects for supply into premium live seafood markets. The administration to scampi of Ado and L-th in isolation or as a mixture (Ado/L-th), caused a significant decrease in heart rate (HR) with a lasting effect for the 4 hr experimental period. However, this depression of HR did not translate into a systemic downregulation of metabolism, as measured by the key metabolites, i.e., glycogen utilization and the accumulation of lactate and ammonia. The lack of systematic metabolic downregulation would preclude the potential use of Ado and L-th for commercial application in live shipping of crustaceans.
ISSN:1355-557X
1365-2109
DOI:10.1155/2024/2617601