On the development of a technological solution for long-term preservation of the commercial qualities in live oysters

• Published in: Libro de actas XI Congreso Ibérico y IX Congreso Iberoamericano de Ciencias y Técnicas del Frío Cytef2022. Avances en Ciencias y Técnicas del Frío - 11
• Main Authors: Garcia, Marcos Antonio, Silveira Jr., Nelson, Mendes, Luciano Antonio, Cordeiro Mendonça, Kátia
• Other Authors: Universidad Politécnica de Cartagena
• Format: Conference Object
• Language: English
• Published: Universidad Politécnica de Cartagena. Ediciones UPCT
• Subjects: CYTEF; Crassostrea gigas; Product development; Summer mortality; Máquinas y Motores Térmicos; Pacific; Pacific oyster
• Online Access: http://hdl.handle.net/10317/11552; https://doi.org/10.31428/10317/11552

The Pacific Oyster has adapted well to the southern Brazilian environmental conditions, where the combination of factors allows harvest in less than eight months. Although convenient for most of the year, it is during summer that water temperature can exceed 30 ºC, a summer condition that leads to high mortality rates. According to the literature, if spawning is not triggered, a substantial reduction in mortality can be achieved. Studies previously presented at CYTEF 2020 showed that confining oysters at temperatures close to those of basal metabolism can inhibit the effects of gametogenesis. Further research was conducted in order to verify the possible outcomes of long term confinement of late autumn harvested oysters, presenting high glycogen reserves. This article reports the experimental results of those tests, regarding the preservation of quality attributes and the reduction of mortality rates, when confining oysters under temperatures similar to those of basal metabolism regime.