Size‐based survival of cultured Argopecten purpuratus (L, 1819) under severe hypoxia

Type Article
Acceptance Date 2021 IN PRESS
Language English
Author(s) Cueto‐vega RosaORCID1, 2, Flye‐sainte‐marie Jonathan1, Aguirre‐velarde Arturo3, Jean Frederic1, Gil‐kodaka Patricia2, Thouzeau Gerard4
Affiliation(s) 1 : Facultad de Pesquería UMR 6539 – LEMAR (CNRS/UBO/IRD/IFREMER), IUEM, Technopôle Brest‐Iroise Plouzané ,France
2 : Facultad de Pesquería Universidad Nacional Agraria la Molina Lima ,Peru
3 : Laboratorio de Ecofisiología Acuática Instituto del Mar del Perú Chucuito ,Peru
4 : Facultad de Pesquería UMR 6539 – LEMAR (CNRS/UBO/IRD/IFREMER), IUEM, Technopôle Brest‐Iroise Plouzané ,France
Source Journal of the World Aquaculture Society (0893-8849) (Wiley) In Press
DOI 10.1111/jwas.12777
Keyword(s) Argopecten purpuratus, Lt50, mass mortality, severe hypoxia, size effect
Abstract

During recent years, mass mortalities of cultured scallops became more frequent in Peruvian bays. One of the main drivers related to these mortalities was hypoxic events. This study was designed to understand the hypoxia phenomenon in these bays and to assess how the Peruvian scallop, Argopecten purpuratus, can cope with reduced oxygen levels in seawater based on individual size. First, we analyzed the relationships between dissolved oxygen saturation and other environmental parameters (the Coastal El Niño Index, temperature, salinity and pH) in bottom seawater, the frequency and intensity of hypoxic events in two main culture areas (Sechura and Paracas Bays), and their relationship with scallop mass mortalities. Then, we performed experiments with two size groups of A. purpuratus (31 and 80 mm shell height; seed and commercial size, respectively) to assess their respective survival time under severe hypoxia (1% oxygen saturation) at 16°C and a salinity of 35. Finally, the results of the field records and the experimental data are used to suggest ways to improve scallop cultivation along the Peruvian coast.

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Cueto‐vega Rosa, Flye‐sainte‐marie Jonathan, Aguirre‐velarde Arturo, Jean Frederic, Gil‐kodaka Patricia, Thouzeau Gerard Size‐based survival of cultured Argopecten purpuratus (L, 1819) under severe hypoxia. Journal of the World Aquaculture Society IN PRESS. Publisher's official version : https://doi.org/10.1111/jwas.12777 , Open Access version : https://archimer.ifremer.fr/doc/00692/80410/