Chondrosia reniformis (Porifera, demodpongiae) is a common species of sponge found in Mediterranean shallow waters up to a depth of 50meters. Unlike most sponges, C.reniformis lacks slicules and spongin, but presents only collagen, both fibrillar and non-fibrillar, making it a potential economical source of this protein. Collagen is a metabolite widely used in biomedicine, cosmetic and food industries and more, with a constantly increasing demand. This study is part of the Medspon project, in collaboration with the Alfred Wegener Institute, with the goal of creating a standardized rearing method for C.reniformis. Several trials were carried out in order to evaluate which conditions would lead to a higher growth rate. Sponges were divided in 7 trials, in which different combinations of the following food and supplements were administered: Ascorbic Acid, silicates, zeolites, phytoplankton, coral food and a mix of spirulina and dextrose. By comparing the volume of the sponges at different times, it was possible to calculate the percentual increment or decrement in volume, and to estimate the yearly growth rate. The most relevant result of this study was that collagen production in C.reniformis was stimulated by administration of siliceous material and Ascorbic Acid. In conclusion, even though more studies are necessary, promising results were reached in regard to the growth of this species in ideal conditions.
Chondrosia reniformis (Porifera, demodpongiae) è una specie di spugna comune nelle acque basse del Mediterraneo, fino a una profondità di 50 metri. A differenza della maggioranza delle spugne, C.reniformis non presenta spicole né spongina, ma soltanto collagene, sia fibrillare che non fibrillare, rendendola una possibile fonte economica di questa proteina. Il collagene è un metabolita utilizzato ampiamente in biomedicina, industria cosmetica, alimentare e altro ancora, con una domanda in costante crescita. Questo studio è parte del progetto Medspon, in collaborazione con l’Alfred Wegener Institute, con lo scopo di creare un metodo standard per l’allevamento di C.reniformis. Diversi esperimenti sono stati condotti per valutare quali condizioni portino a un maggiore tasso di crescita. Le spugne sono state divise in 7 trials in cui sono stati somministrati in diverse combinazioni i seguenti tipi cibo e supplementi: Acido Ascorbico, silicati, zeoliti, fitoplankton, cibo per coralli e un mix di spirulina e destrosio. Confrontando il volume delle spugne ai vari tempi è stato possibile dedurre l’incremento o decremento percentuale di volume e approssimare il tasso di crescita annuale. Il risultato più rilevante del presente studio è che la produzione di collagene in C. reniformis sembra essere stimolata dalla somministrazione di materiale siliceo e di Acido Ascorbico.In conclusione, nonostante vi sia la necessità di ulteriori studi, risultanti promettenti sono stati raggiunti riguardo la crescita di questa specie in presenza di condizioni ideali.
LA CRESCITA DI CHONDROSIA RENIFORMIS (PORIFERA: CHONDROSIIDAE) IN DIVERSE CONDIZIONI DI ALLEVAMENTO.
DE MIN, ANDREA
2021/2022
Abstract
Chondrosia reniformis (Porifera, demodpongiae) is a common species of sponge found in Mediterranean shallow waters up to a depth of 50meters. Unlike most sponges, C.reniformis lacks slicules and spongin, but presents only collagen, both fibrillar and non-fibrillar, making it a potential economical source of this protein. Collagen is a metabolite widely used in biomedicine, cosmetic and food industries and more, with a constantly increasing demand. This study is part of the Medspon project, in collaboration with the Alfred Wegener Institute, with the goal of creating a standardized rearing method for C.reniformis. Several trials were carried out in order to evaluate which conditions would lead to a higher growth rate. Sponges were divided in 7 trials, in which different combinations of the following food and supplements were administered: Ascorbic Acid, silicates, zeolites, phytoplankton, coral food and a mix of spirulina and dextrose. By comparing the volume of the sponges at different times, it was possible to calculate the percentual increment or decrement in volume, and to estimate the yearly growth rate. The most relevant result of this study was that collagen production in C.reniformis was stimulated by administration of siliceous material and Ascorbic Acid. In conclusion, even though more studies are necessary, promising results were reached in regard to the growth of this species in ideal conditions.File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12075/9930