No abstract

Harvest pressure on brown macroalgae of the Lessonia genus has increased in recent years in Peru and Chile, due to the high demand from the global hydrocolloid industry. After a taxonomic review, in 2012, the intertidal species Lessonia nigrescens was segregated into two species, being L. berteroana distributed in southern Peru and northern Chile (17-30°S). Based on genetic tools we confirm the identification as L. berteroana and report its presence up to 15°23’S. It is recommended to update the status of the species into Peruvian regulations and scientific publications.

Adult Mesodesma donacium were conditioned with the following microalgae diets: D1) Isochrysis galbana (local) + Chaetoceros sp. (local) + Phaeodactylum tricornutum (local); D2) I. galbana (local) + Ch. gracilis (commercial) + Pavlova lutheri (commercial); D3) Chaetoceros sp. (local) + I. galbana (commercial) + P. lutheri (commercial); and a control (C) with commercial I. galbana, Ch. gracilis, and P. lutheri. M. donacium were fed with a continuous 5