The American lobster (Homarus americanus) represents a species of great economic importance, especially for many countries along the northwestern Atlantic. The fishing of this crustacean is regulated and controlled by a limited yet stringent set of regulations, which play a key role in its global commercialization. After capture, the lobster goes through various critical stages, such as storage and transportation, which, if inadequately managed, can lead to undesired mortality of specimens and subsequent downgrading of the product. The aim of this study was to analyze the factors influencing the quality of lobsters after fishing, considering physiological and biochemical aspects. To this end, the health status of specimens from different suppliers and batches was evaluated over a period of five months, using the hemolymph Brix degree as an indicator. The results were correlated with mortalities, demonstrating a modest degree of correlation (r) and significance (α), with values of r = -0.34 and α = 2.343 (p = 0.05), providing the opportunity to establish a basis for the development of a predictive model. In conclusion, this study highlighted the importance of proper management of lobsters after capture to ensure their quality and survival, while also considering customer complaints and the resulting economic impact. The use of the hemolymph Brix degree as an indicator proved to be useful in monitoring the health status of lobsters during distribution.
L'astice americano (Homarus americanus) rappresenta una specie di grande importanza economica, soprattutto per molti paesi che si affacciano sull'Atlantico nord-occidentale. La pesca di questo crostaceo è regolamentata e controllata da un numero limitato ma rigido di normative, che rappresentano un fattore chiave per la sua commercializzazione a livello mondiale. Dopo la cattura, l'astice passa attraverso diverse fasi critiche, come lo stoccaggio e il trasporto, che, se gestite in modo inadeguato, possono causare la morte indesiderata degli esemplari e il conseguente declassamento del prodotto. Lo scopo di questo studio è stato analizzare i fattori che influenzano la qualità dell'astice dopo la pesca, prendendo in considerazione aspetti fisiologici e biochimici. A tal fine, è stato valutato lo stato di salute degli esemplari provenienti da diversi fornitori e lotti nel corso di cinque mesi, utilizzando il grado Brix emolinfatico come indicatore. I risultati sono stati correlati alle mortalità, dimostrando un modesto grado di correlazione (r) e significatività (α), rispettivamente r=-0,34 e α=2,343 (p=0,05), dando la possibilità di creare una base per lo sviluppo di un modello predittivo. In conclusione, questo studio ha evidenziato l'importanza di una gestione adeguata dell'astice dopo la cattura al fine di garantire la sua qualità e sopravvivenza, tenendo conto anche i reclami dei clienti e l’impatto economico che ne deriva. L'uso del grado Brix emolinfatico come indicatore si è dimostrato utile per monitorare lo stato di salute dell'astice durante la distribuzione.
Nuovo metodo per la valutazione della qualità commerciale dell’astice americano (Homarus amaricanus) vivo – un caso aziendale
SGARAVATTO, GIACOMO
2022/2023
Abstract
The American lobster (Homarus americanus) represents a species of great economic importance, especially for many countries along the northwestern Atlantic. The fishing of this crustacean is regulated and controlled by a limited yet stringent set of regulations, which play a key role in its global commercialization. After capture, the lobster goes through various critical stages, such as storage and transportation, which, if inadequately managed, can lead to undesired mortality of specimens and subsequent downgrading of the product. The aim of this study was to analyze the factors influencing the quality of lobsters after fishing, considering physiological and biochemical aspects. To this end, the health status of specimens from different suppliers and batches was evaluated over a period of five months, using the hemolymph Brix degree as an indicator. The results were correlated with mortalities, demonstrating a modest degree of correlation (r) and significance (α), with values of r = -0.34 and α = 2.343 (p = 0.05), providing the opportunity to establish a basis for the development of a predictive model. In conclusion, this study highlighted the importance of proper management of lobsters after capture to ensure their quality and survival, while also considering customer complaints and the resulting economic impact. The use of the hemolymph Brix degree as an indicator proved to be useful in monitoring the health status of lobsters during distribution.File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/48599