FN Archimer Export Format
PT J
TI A trade-off between mucocytes and bacteriocytes in Loripes orbiculatus gills (Bivalvia, Lucinidae): a mixotrophic adaptation to seasonality and reproductive status in a symbiotic species?
BT 
AF Roques, Cécile
   Grousset, Evelyse
   Troussellier, Marc
   Hermet, Sophie
   Le Carrer, Johan
   Sar, Chamroeun
   Caro, Audrey
AS 1:1;2:1;3:1;4:1;5:2;6:3;7:1;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Marine Biodiversity, Exploitation and Conservation (MARBEC), Univ Montpellier, CNRS, Ifremer, IRD, Montpellier, France
   Martinique Natural Marine Park, Fort-de-France, France
   Montpellier Ressources Imagerie, Montpellier, France
C2 UNIV MONTPELLIER, FRANCE
   MARTINIQUE NATURAL MARINE PARK, FRANCE
   MONTPELLIER RESSOURCES IMAGERIE, FRANCE
UM MARBEC
IN WOS Cotutelle UMR
   copubli-france
IF 2.573
TC 1
UR https://archimer.ifremer.fr/doc/00653/76550/79703.pdf
LA English
DT Article
AB In this study, we investigated the composition of the gill tissue relative to the reproductive status of the lucinid clam Loripes orbiculatus (sensus Poli, 1791) according to seasonal as well as biological parameters to provide insights into the physiological variability of this symbiotic bivalve. Temporal variation in population density was also studied. The species was investigated in Zostera noltii seagrass beds in the Thau lagoon (43°26′52.27′′ N, 3°39′6.25′′ E) in the south of France in a monthly sampling study from May 2013 to July 2015. A total of 257 individual adults of different sizes were analysed according to water temperature and salinity variations. The findings revealed a very stable Loripes density over time, with one single reproductive period during late spring/early summer. We also found that bacteriocytes and mucocytes in the gills were negatively correlated and highly variable in their respective proportions. Bacteriocytes remained dominant during cold periods, whereas mucocytes appeared mainly in the gills of large individuals when the water temperature increased in the spring. As mucocytes were also related with gonadal maturation, we hypothesize that these may allow the host to increase the proportion of heterotrophy in its nutrition during spring primary production to face the metabolic demands required for reproduction. It is possible that mucocytes may also be involved in host immunity. 
PY 2020
PD SEP
SO Marine Biology
SN 0025-3162
PU Springer Science and Business Media LLC
VL 167
IS 10
UT 000576898400001
DI 10.1007/s00227-020-03768-w
ID 76550
ER

EF