FN Archimer Export Format
PT J
TI Chronic and severe hypoxic conditions in Paracas Bay, Pisco, Peru: Consequences on scallop growth, reproduction, and survival
BT 
AF Aguirre-Velarde, Arturo
   Thouzeau, Gerard
   Jean, Frederic
   Mendo, Jaime
   Cueto-Vega, Rosa
   Kawazo-Delgado, Midori
   Vásquez-Spencer, Jazmín
   Herrera-Sanchez, Diego
   Vega-Espinoza, Alex
   Flye-Sainte-Marie, Jonathan
AS 1:1;2:2;3:4;4:3;5:3;6:3;7:3;8:3;9:3;10:4;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 Laboratorio de Ecofisiología Acuática, IMARPE, Esquina Gamarra y General Valle S/N Chucuito Callao, Peru
   LEMAR, UMR 6539 (UBO/CNRS/IRD/Ifremer), IUEM, Rue Dumont d'Urville, 29280 Plouzané, France
   Facultad de Pesquería, Universidad Nacional Agraria La Molina, Av. La Molina S/N, La Molina, Lima, Peru
   LEMAR, UMR 6539 (UBO/CNRS/IRD/Ifremer), IUEM, Rue Dumont d'Urville, 29280 Plouzané, France
C2 IMARPE, PERU
   CNRS, FRANCE
   UNIV NAC AGRARIA LA MOLINA, PERU
   UBO, FRANCE
UM LEMAR
IN WOS Cotutelle UMR
   copubli-int-hors-europe
   copubli-sud
IF 3.224
TC 19
UR https://archimer.ifremer.fr/doc/00504/61547/65430.pdf
LA English
DT Article
DE ;Argopecten purpuratus;High frequency monitoring;Coastal upwelling;Hypoxic/anoxic conditions;Growth;Reproduction;Aquaculture;Milky-turquoise water/aguas Blancas
AB The response of Argopecten purpuratus (Peruvian scallop) to environmental conditions was studied in the upwelling-influenced Bay of Paracas (Peru). Scallops growth and reproduction were monitored weekly over a 7-month period under two conditions (culture depths): on the bottom and 2 m above (suspended culture). At the same time, a high-frequency environmental monitoring was realized at the aforementioned depths. The results indicate that environmental conditions in the Bay are highly variable, especially during the summer: temperature fluctuations up to 8∘C were recorded in less than one day while oxic conditions ranged from oversaturation to anoxia. Milky-turquoise waters discoloration events (sulphide presence suspected) were simultaneously observed together with anoxic conditions and sudden temperature drops. Increased stratification and upwelling favorable winds during the summer might be partly responsible for the observed environmental variability. Higher somatic and gonadal growth were observed in scallops growing in suspended culture compare with bottom culture. This pattern might be related to different environmental conditions at culture depth: turbidity was lower in suspended culture and hypoxic conditions occurred only 18% of the whole study period versus 48% on the bottom. The Gonadosomatic index varied according to an approx. 30-day cycle between winter and late spring and it was synchronous between the different scallop size groups. During summer, when milky waters and anoxic events occurred frequently, cessation of reproduction, somatic weight losses and increased scallop mortality were observed. Exposure to severe hypoxia and related environmental conditions clearly affected scallop bioenergetics and subsequently growth and reproduction. In addition, the occurrence of milky waters harmed the survival of the Peruvian scallop in culture. These results are discussed in terms of management strategies for sustainable scallop aquaculture in the Bay. 
PY 2019
PD OCT
SO Aquaculture
SN 0044-8486
PU Elsevier BV
VL 512
UT 000491992200004
DI 10.1016/j.aquaculture.2019.734259
ID 61547
ER

EF