Nutritional composition and total collagen content of three commercially important edible jellyfish

Abstract

The study aimed to evaluate nutraceutical potential of three commercially significant edible jellyfish species (Acromitus hardenbergi, Rhopilema hispidum and Rhopilema esculentum). The bell and oral arms of these jellyfishes were analyzed for their proximate composition, calorific value, collagen content, amino acid profile, chemical score and elemental constituent. In general, all jellyfish possessed low calorific values (1.0-4.9 kcal/g D.W.) and negligible fat contents (0.4-1.8 g/100 g D.W.), while protein (20.0-53.9 g/100 g D.W.) and minerals (15.9-57.2g/100g D.W.) were found to be the richest components. Total collagen content of edible jellyfish varied from 122.64 to 693.92 mg/g D.W., accounting for approximately half its total protein content. The dominant amino acids in both bell and oral arms of all jellyfish studied includes glycine, glutamate, threonine, proline, aspartate and arginine, while the major elements were sodium, potassium, chlorine, magnesium, sulfur, zinc and silicon. Among the jellyfish, A. hardenbergi exhibited significantly higher total amino acids, chemical scores and collagen content (p<0.05) compared to R. hispidum and R. esculentum. Having good protein quality and low calories, edible jellyfish is an appealing source of nutritive ingredients for the development of oral formulations, nutricosmetics and functional food.

Body stoichiometry of heterotrophs: assessing drivers of interspecific variations in elemental composition

“…These organisms belong to marine gelatinous taxa such as jellyfishes (Ikeda, 1974). Indeed, in these organisms, chloride, sodium and other minerals make up the bulk of organism dry mass (Khong et al, 2016). Besides, we observed a large between group variability in stoichiometric co-variations (Fig.…”

Weedy futures: can we benefit from the species that thrive in the marine Anthropocene?

“…; Tiwari and Troy ; Khong et al . ). We could also capitalize on weedy species and their weedy attributes to convert damaging excess resources into inert or even edible forms; for instance, weedy plants are often used in freshwater systems to absorb excess nutrients and toxicants produced by farming, aquaculture, and mining activities, with the plant material subsequently incorporated into feed and fertilizer (Ziska and Dukes ; Prasad ).…”

“…; Khong et al . ), alongside harvests of sea‐farmed algae (seaweeds) (Tiwari and Troy ). These taxa support multimillion‐dollar industries and are prized for their high‐quality protein and other properties beneficial to human health.…”

Collagen from Marine Biological Sources and Medical Applications

“…The marine environment serves as an intersting source of collagen and bioactive substances that are utilized in different fields including pharmaceutical, cosmetic, and food industry . Marine collagen can be categorized into two depending on the source: collagen isolated from invertebrate animals including cuttlefish, sea anemone, prawn, star fish, jellyfish, sponges, sea urchin, octopus, squid, constitute invertebrate source of marine collagen. Another category of marine collagen falls under marine vertebrate source which include fish and marine mammals.…”