Distribution and composition of seafloor macrolitter in the trawlable fishing areas along the Algerian coast (Western Mediterranean).

A total of 254 fishing hauls were sampled with a GOC73 bottom trawl during the four demersal resource assessment research cruises, respectively, in 2016, 2019, 2021 and 2022, carried out on board the BELKACEM GRINE research vessel (R/V). We performed the hauls between 22 and 660 m of depth, after which we counted and weighed each piece of marine litter separately to the nearest 0.5 g.

Extraction and characterization of chitin, chitosan, and protein hydrolysate from the invasive Pacific blue crab, Portunus segnis (Forskål, 1775) having potential biological activities.

The diversity of marine biomasses is a set of exploitable and renewable resources with application in several sectors. In this context, a co-culture based on three protease-producing bacterial isolates, namely Aeribacillus pallidus VP3, Lysinibacillus fusiformis C250R, and Anoxybacillus kamchatkensis M1V strains, was carried out in a medium based on the blue swimming crab Portunus segnis bio-waste. Proteases production was optimized using a central composite design (CCD).