Influence of diet assemblage on Ostrea edulis broodstock conditioning and subsequent larval development
In contrast with the Japanese oyster Crassostrea gigas and the Manila clam Ruditapes philippinarum, Ostrea edulis seed production in the hatchery has been reported to be erratic, with sudden and unexplained larval and post-metamorphosis mortalities. Fecundity and initial larval quality have been rel...
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2012
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Online Access: | https://archimer.ifremer.fr/doc/00090/20093/17732.pdf https://doi.org/10.1016/j.aquaculture.2012.08.036 https://archimer.ifremer.fr/doc/00090/20093/ |
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ftarchimer:oai:archimer.ifremer.fr:20093 2023-05-15T15:59:03+02:00 Influence of diet assemblage on Ostrea edulis broodstock conditioning and subsequent larval development Gonzalez, Ricardo Mingant, Christian Petton, Bruno Robert, Rene 2012-10 application/pdf https://archimer.ifremer.fr/doc/00090/20093/17732.pdf https://doi.org/10.1016/j.aquaculture.2012.08.036 https://archimer.ifremer.fr/doc/00090/20093/ eng eng Elsevier Science Bv https://archimer.ifremer.fr/doc/00090/20093/17732.pdf doi:10.1016/j.aquaculture.2012.08.036 https://archimer.ifremer.fr/doc/00090/20093/ 2012 Elsevier B.V. All rights reserved. info:eu-repo/semantics/openAccess restricted use Aquaculture (0044-8486) (Elsevier Science Bv), 2012-10 , Vol. 364-365 , P. 272-280 Ostrea edulis Feeding Broodstock conditioning Larval development Flow-through text Publication info:eu-repo/semantics/article 2012 ftarchimer https://doi.org/10.1016/j.aquaculture.2012.08.036 2021-09-23T20:21:05Z In contrast with the Japanese oyster Crassostrea gigas and the Manila clam Ruditapes philippinarum, Ostrea edulis seed production in the hatchery has been reported to be erratic, with sudden and unexplained larval and post-metamorphosis mortalities. Fecundity and initial larval quality have been related to broodstock conditioning, but effects on larval development and metamorphosis remain poorly understood. In addition, molluscan larval mortalities have been often associated with bacterial contamination and flow-through techniques may help to overcome this problem. Both aspects have been considered in the present work. O. edulis broodstock were conditioned at 19 °C and fed three different microalgal diets. Two were single-species diets: Rhodomonas salina (Rs) or Thalassiosira weissflogii (Tw) and the third was a combination of both species (RsTw: 50/50 in equivalent cell volume). Mean fecundity, expressed as mean number of larvae released by oysters fed different diets, was 0.16, 0.28 and 0.39 million, respectively; whereas, mean larval size at release differed significantly from 174 to 181 µm. Moreover, when broodstock were fed combined assemblage (RsTw), larval release occurred more consistently. Larvae were subsequently fed two different diets over an 11-day period: Chaetoceros gracilis solely (Cg) or a bi-specific assemblage (T: Isochrysis affinis galbana plus Cg). Larval growth ranged from 5.5 to 7.4 µm d-1 for larvae fed Cg and was generally higher (8.1 µm d-1) in larvae fed the mixed diet TCg. On day 11, larval survival and competence ranged from 50 to 75% and 40 to 70% respectively, these results being closely related to broodstock nutrition. On day 18 larval settlement ranged from 1 to 60%. When analyzing overall performance, from fecundity to settlement, best results were obtained with broodstock, fed the bi-specific diet (RsTw), which released numerous larvae over a short period with satisfactory larval development and high metamorphosis, and these larvae also fed bi-specific diet, TCg. Article in Journal/Newspaper Crassostrea gigas Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Aquaculture 364-365 272 280 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Ostrea edulis Feeding Broodstock conditioning Larval development Flow-through |
spellingShingle |
Ostrea edulis Feeding Broodstock conditioning Larval development Flow-through Gonzalez, Ricardo Mingant, Christian Petton, Bruno Robert, Rene Influence of diet assemblage on Ostrea edulis broodstock conditioning and subsequent larval development |
topic_facet |
Ostrea edulis Feeding Broodstock conditioning Larval development Flow-through |
description |
In contrast with the Japanese oyster Crassostrea gigas and the Manila clam Ruditapes philippinarum, Ostrea edulis seed production in the hatchery has been reported to be erratic, with sudden and unexplained larval and post-metamorphosis mortalities. Fecundity and initial larval quality have been related to broodstock conditioning, but effects on larval development and metamorphosis remain poorly understood. In addition, molluscan larval mortalities have been often associated with bacterial contamination and flow-through techniques may help to overcome this problem. Both aspects have been considered in the present work. O. edulis broodstock were conditioned at 19 °C and fed three different microalgal diets. Two were single-species diets: Rhodomonas salina (Rs) or Thalassiosira weissflogii (Tw) and the third was a combination of both species (RsTw: 50/50 in equivalent cell volume). Mean fecundity, expressed as mean number of larvae released by oysters fed different diets, was 0.16, 0.28 and 0.39 million, respectively; whereas, mean larval size at release differed significantly from 174 to 181 µm. Moreover, when broodstock were fed combined assemblage (RsTw), larval release occurred more consistently. Larvae were subsequently fed two different diets over an 11-day period: Chaetoceros gracilis solely (Cg) or a bi-specific assemblage (T: Isochrysis affinis galbana plus Cg). Larval growth ranged from 5.5 to 7.4 µm d-1 for larvae fed Cg and was generally higher (8.1 µm d-1) in larvae fed the mixed diet TCg. On day 11, larval survival and competence ranged from 50 to 75% and 40 to 70% respectively, these results being closely related to broodstock nutrition. On day 18 larval settlement ranged from 1 to 60%. When analyzing overall performance, from fecundity to settlement, best results were obtained with broodstock, fed the bi-specific diet (RsTw), which released numerous larvae over a short period with satisfactory larval development and high metamorphosis, and these larvae also fed bi-specific diet, TCg. |
format |
Article in Journal/Newspaper |
author |
Gonzalez, Ricardo Mingant, Christian Petton, Bruno Robert, Rene |
author_facet |
Gonzalez, Ricardo Mingant, Christian Petton, Bruno Robert, Rene |
author_sort |
Gonzalez, Ricardo |
title |
Influence of diet assemblage on Ostrea edulis broodstock conditioning and subsequent larval development |
title_short |
Influence of diet assemblage on Ostrea edulis broodstock conditioning and subsequent larval development |
title_full |
Influence of diet assemblage on Ostrea edulis broodstock conditioning and subsequent larval development |
title_fullStr |
Influence of diet assemblage on Ostrea edulis broodstock conditioning and subsequent larval development |
title_full_unstemmed |
Influence of diet assemblage on Ostrea edulis broodstock conditioning and subsequent larval development |
title_sort |
influence of diet assemblage on ostrea edulis broodstock conditioning and subsequent larval development |
publisher |
Elsevier Science Bv |
publishDate |
2012 |
url |
https://archimer.ifremer.fr/doc/00090/20093/17732.pdf https://doi.org/10.1016/j.aquaculture.2012.08.036 https://archimer.ifremer.fr/doc/00090/20093/ |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
Aquaculture (0044-8486) (Elsevier Science Bv), 2012-10 , Vol. 364-365 , P. 272-280 |
op_relation |
https://archimer.ifremer.fr/doc/00090/20093/17732.pdf doi:10.1016/j.aquaculture.2012.08.036 https://archimer.ifremer.fr/doc/00090/20093/ |
op_rights |
2012 Elsevier B.V. All rights reserved. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.aquaculture.2012.08.036 |
container_title |
Aquaculture |
container_volume |
364-365 |
container_start_page |
272 |
op_container_end_page |
280 |
_version_ |
1766394838519906304 |