Biochemical characteristics of four marine fish skins in Korea.
In this study, we investigated the biochemical characteristics of the fish skins of four industrial species: olive flounder (Paralichthys olivaceus), black rockfish (Sebastes schlegeli), sea bass (Lateolabrax maculatus) and red sea bream (Pagrus major). There is high domestic demand in Korea for farming of these fish for human consumption. Crude protein contents in the skin of these fish ranged from 73% to 94% by dry weight; this was in part due to a high content of the structural protein, collagen. Among the four species, olive flounder had the thickest dermal and epidermal layers in the dorsal skin. This species was also associated with the highest extraction ratio of acid-soluble collagen. We also examined whether fish skin could be a cost-effective alternative to current fish meal sources. Our analysis indicates that, when supplemented with additional fish oils and essential amino acids, fish skin is a viable alternative for fish meal formulations.
Southwest Sea Fisheries Research Institute, National Fisheries Research and Development Institute (NFRDI), Yosu 556-823, Republic of Korea.
Jae-Kwon
JK
Cho
Southwest Sea Fisheries Research Institute, National Fisheries Research and Development Institute (NFRDI), Yosu 556-823, Republic of Korea.
Young-Guk
YG
Jin
College of Fisheries and Ocean Science, Chonnam National University, Yosu 550-749, Republic of Korea.
Sung-Ju
SJ
Rha
College of Fisheries and Ocean Science, Chonnam National University, Yosu 550-749, Republic of Korea.
Seon-Jae
SJ
Kim
College of Fisheries and Ocean Science, Chonnam National University, Yosu 550-749, Republic of Korea. Electronic address: hwangjh73@yahoo.co.kr.
Jae-Ho
JH
Hwang
D000596:Amino Acids / Q000032:analysis; D000818:Animals; D001669:Biochemical Phenomena; D005227:Fatty Acids / Q000032:analysis; D029941:Fish Proteins / Q000032:analysis; D005399:Fishes / Q000378:metabolism*; D005432:Flounder / Q000378:metabolism; D006801:Humans; D056910:Republic of Korea; D021541:Sea Bream / Q000378:metabolism; D012867:Skin / Q000033:anatomy & histology / Q000737:chemistry*
D000596:Amino Acids; D005227:Fatty Acids; D029941:Fish Proteins
By-product; Collagen; Fish skin; Protein; Utilisation