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Health promoting effects of Salicornia ramosissima biomass in diets for European seabass (Dicentrarchus labrax)
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Abstract(s)
O projecto AQUACOMBINE pretende demonstrar a produção em aquacultura combinada com a produção de halófitas, através da utilização dos princípios de economia circular, onde os resíduos são recuperados e utilizados dentro do sistema para criar valor interno e novos produtos, para além de evitar desperdícios. Todas as partes da biomassa halófita serão utilizadas para produzir múltiplos produtos tais como alimentos, rações, extractos botânicos e compostos bioactivos puros, bem como biogás dos resíduos finais para produzir energia e um resíduo rico em nutrientes para trazer nutrientes essenciais (por exemplo, fosfatos) de volta às terras de cultivo. As halófitas, como do género Salicornia são plantas tolerantes ao sal actualmente utilizadas para temperos e em saladas na dieta humana, cujo género não só apresenta um grande potencial como planta de cultura em solos altamente salinos, mas também valor na medicina tradicional exibindo atividades biológicas e farmacológicas. O presente estudo foi concebido para a avaliação dos efeitos da inclusão da Salicornia ramosissima J. Woods no estado de saúde de uma espécie com elevado interesse comercial, o robalo (Dicentrarchus labrax). Foi observado que a inclusão de Salicornia (fracção não usada para consumo humano) até 10% da ração de robalo, não compromete o crescimento e o estado imunitário dos peixes após um período de alimentação de 62 dias. Mas quando os peixes foram desafiados com uma bactéria inactivada, demonstrou uma resposta inflamatória concomitante à Photobacterium damselae subsp. piscicida inativada. Verificou-se um aumento da concentração de leucócitos na cavidade peritoneal em peixes alimentados com 10% de inclusão de salicornia, em comparação com a dieta controlo. Assim, podemos concluir que a inclusão de Salicórnia numa dieta do robalo, até 10%, pode ser feita com sucesso, uma vez que não demonstrou alterações no sistema imunitário dos peixes. Além disso perante um estimulo imunitário esse mesmo nivel de inclusão potencia a resposta inflamatória aumentando o recrutamento celular para o local da infecção.
The AQUACOMBINE project aims to demonstrate aquaculture production combined with halophyte production by using circular economy principles, where waste is recovered and used within the system to create internal value and new products, in addition to avoiding waste. All parts of the halophyte biomass will be used to produce multiple products such as food, feed, botanical extracts and pure bioactive compounds, as well as biogas from the final waste to produce energy and a nutrient-rich residue to bring essential nutrients (e.g. phosphates) back to farmland. The halophytes such as Salicornia genus are salt-tolerant plants currently used for condiments and on salads in the human diet, the genus of which not only has great potential as a crop plant in highly saline soils, but also value in traditional medicine exhibiting biological and pharmacological activities. The present study was designed to evaluate the effects of the inclusion of Salicornia ramosissima J. Woods on the health status of a species of high commercial interest, the European seabass (Dicentrarchus labrax). It was observed that the inclusion of Salicornia (fraction not used for human consumption) up to 10% of the diet, did not compromise the growth and immune status of the fish after a feeding period of 62 days. But when the fish were challenged with an inactivated bacterium, it demonstrated an inflammatory response concomitant with the inactivated Photobacterium damselae subsp. piscicida. An increased concentration of leukocytes was found in the peritoneal cavity in fish fed 10% of Salicornia inclusion compared to the control diet. Thus, we can conclude that the inclusion of Salicornia in a sea bass diet, up to 10%, can be done successfully, as it showed no changes in the fish immune system. Moreover, upon immune stimulation, the same inclusion level enhanced the inflammatory response by increasing cell recruitment to the infection focus.
The AQUACOMBINE project aims to demonstrate aquaculture production combined with halophyte production by using circular economy principles, where waste is recovered and used within the system to create internal value and new products, in addition to avoiding waste. All parts of the halophyte biomass will be used to produce multiple products such as food, feed, botanical extracts and pure bioactive compounds, as well as biogas from the final waste to produce energy and a nutrient-rich residue to bring essential nutrients (e.g. phosphates) back to farmland. The halophytes such as Salicornia genus are salt-tolerant plants currently used for condiments and on salads in the human diet, the genus of which not only has great potential as a crop plant in highly saline soils, but also value in traditional medicine exhibiting biological and pharmacological activities. The present study was designed to evaluate the effects of the inclusion of Salicornia ramosissima J. Woods on the health status of a species of high commercial interest, the European seabass (Dicentrarchus labrax). It was observed that the inclusion of Salicornia (fraction not used for human consumption) up to 10% of the diet, did not compromise the growth and immune status of the fish after a feeding period of 62 days. But when the fish were challenged with an inactivated bacterium, it demonstrated an inflammatory response concomitant with the inactivated Photobacterium damselae subsp. piscicida. An increased concentration of leukocytes was found in the peritoneal cavity in fish fed 10% of Salicornia inclusion compared to the control diet. Thus, we can conclude that the inclusion of Salicornia in a sea bass diet, up to 10%, can be done successfully, as it showed no changes in the fish immune system. Moreover, upon immune stimulation, the same inclusion level enhanced the inflammatory response by increasing cell recruitment to the infection focus.
Description
Keywords
Halófitas compostos bioactivos inflamação bactéria Halophytes bioactive compounds inflammation bacteria