Table 1.

Protease production by various microbial strains grown in fish processing waste based media

Fish raw materials	Preparation of the growth mediaa	Microbial strains	Activity (U/ml)	References
Heads and viscera of Sardinella	Raw materials cooked, pressed, minced and dried (80 °C, 24–48 h)	Pseudomonas aeruginosa MN7	7,800	Triki-Ellouz et al. (2003)
Heads and viscera of Sardinella	Raw materials cooked, pressed, minced and dried (80 °C, 24–48 h)	Bacillus subtilis	720	Ellouz et al. (2001)
Viscera from rainbow trout, swordfish, squid and yellowfin tuna	Raw materials ground with water and supernatants recovered by centrifugation and used to prepare the peptone	Vibrio anguillarum	35–68	Vazquez et al. (2006)
Viscera from rainbow trout, swordfish, squid and yellowfin tuna	Raw materials were ground with water and supernatants recovered by centrifugation and used to prepare the peptone	Vibrio splendidus	9–30	Vazquez et al. (2006)
Raw tuna waste	Raw materials cooked, bones removed, pressed to remove water and fat, pressed, minced and dried (80 °C, 24–48 h)	Bacillus cereus	74.77	Esakkiraj et al. (2009)
Defatted tuna waste	Extraction with chloroform/methanol	Bacillus cereus	134.57	Esakkiraj et al. (2009)
Acid-hydrolyzed tuna waste	Method described by Gao et al. (2006)	Bacillus cereus	60.37	Esakkiraj et al. (2009)
Alkali-hydrolyzed tuna waste	Method described by Batista (1999)	Bacillus cereus	65.96	Esakkiraj et al. (2009)

^aThe obtained fish powder was added to the basal medium