Farming the High Seas: Biological performance of the offshore cultivated oysters Ostrea edulis and Crassostrea gigas in the North Sea.
Aquaculture production plays an increasingly important role to meet the global demand for aquatic products and expands continuously. Most mariculture organisms are produced in coastal areas, where space is scarce and stakeholder conflicts exist. For extensive cultures farming off the coast at offsho...
Main Author: | |
---|---|
Other Authors: | , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
Universität Bremen
2012
|
Subjects: | |
Online Access: | https://media.suub.uni-bremen.de/handle/elib/467 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103084-16 |
id |
ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/467 |
---|---|
record_format |
openpolar |
spelling |
ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/467 2023-05-15T15:57:45+02:00 Farming the High Seas: Biological performance of the offshore cultivated oysters Ostrea edulis and Crassostrea gigas in the North Sea. Austern - erfolgreiche Kandidaten für die Offshore Aquakultur? Offshore Freilandexperimente in der Nordsee zur biologischen Eignung der Austernarten Ostrea edulis und Crassostrea gigas. Pogoda, Bernadette Hagen, Wilhelm Buck, Bela 2012-04-13 application/pdf https://media.suub.uni-bremen.de/handle/elib/467 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103084-16 eng eng Universität Bremen FB2 Biologie/Chemie https://media.suub.uni-bremen.de/handle/elib/467 urn:nbn:de:gbv:46-00103084-16 info:eu-repo/semantics/openAccess Bitte wählen Sie eine Lizenz aus: (Unsere Empfehlung: CC-BY) CC-BY offshore aquaculture ostreiculture oyster cultivation Ostrea edulis Crassostrea gigas lipid composition biochemical composition IMTA open ocean 570 570 Life sciences biology ddc:570 Dissertation doctoralThesis 2012 ftsubbremen 2022-11-09T07:09:22Z Aquaculture production plays an increasingly important role to meet the global demand for aquatic products and expands continuously. Most mariculture organisms are produced in coastal areas, where space is scarce and stakeholder conflicts exist. For extensive cultures farming off the coast at offshore sites could be a solution to eliminate these problems and facilitate further expansion of environmentally friendly and sustainable aquaculture. The aim of this study was to examine the biological adequacy of two candidate species for such an offshore ostreiculture, the European flat oyster Ostrea edulis and the Pacific oyster Crassostrea gigas. Research focused on growth, condition and survival. Oyster spat of both species was transferred to different offshore sites in the North Sea in 2004 and 2007 and cultivated for six month during growing season. Samples were taken every six to eight weeks from April to October and growth rates, condition indices and survival rates were measured. To enable a deeper insight in oyster condition, elemental (carbon, nitrogen) and biochemical compositions (protein, glycogen and lipid levels) as well as lipid class and fatty acid compositions were investigated. Furthermore, the macroparasitic infestation of oysters at offshore cultivation sites and for comparison, at nearshore wild banks, was investigated. Low infestation rates or even a complete absence of such parasites would be a major advantage for shellfish production activities and would therefore play an important role in the list of site-selection criteria for a certain region. Results showed that both oyster species grow successfully in high-energy offshore environments. Mean growth rates were similar to those measured in individuals from coastal habitats (wild banks and cultures) and the condition index revealed normal seasonal variations in both species. Survival rates of both species were extremely high. However, at one single site a high mortality rate was observed for O. edulis at the end of the experiment. Differences ... Doctoral or Postdoctoral Thesis Crassostrea gigas Pacific oyster Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Imta ENVELOPE(156.945,156.945,61.792,61.792) Pacific |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
offshore aquaculture ostreiculture oyster cultivation Ostrea edulis Crassostrea gigas lipid composition biochemical composition IMTA open ocean 570 570 Life sciences biology ddc:570 |
spellingShingle |
offshore aquaculture ostreiculture oyster cultivation Ostrea edulis Crassostrea gigas lipid composition biochemical composition IMTA open ocean 570 570 Life sciences biology ddc:570 Pogoda, Bernadette Farming the High Seas: Biological performance of the offshore cultivated oysters Ostrea edulis and Crassostrea gigas in the North Sea. |
topic_facet |
offshore aquaculture ostreiculture oyster cultivation Ostrea edulis Crassostrea gigas lipid composition biochemical composition IMTA open ocean 570 570 Life sciences biology ddc:570 |
description |
Aquaculture production plays an increasingly important role to meet the global demand for aquatic products and expands continuously. Most mariculture organisms are produced in coastal areas, where space is scarce and stakeholder conflicts exist. For extensive cultures farming off the coast at offshore sites could be a solution to eliminate these problems and facilitate further expansion of environmentally friendly and sustainable aquaculture. The aim of this study was to examine the biological adequacy of two candidate species for such an offshore ostreiculture, the European flat oyster Ostrea edulis and the Pacific oyster Crassostrea gigas. Research focused on growth, condition and survival. Oyster spat of both species was transferred to different offshore sites in the North Sea in 2004 and 2007 and cultivated for six month during growing season. Samples were taken every six to eight weeks from April to October and growth rates, condition indices and survival rates were measured. To enable a deeper insight in oyster condition, elemental (carbon, nitrogen) and biochemical compositions (protein, glycogen and lipid levels) as well as lipid class and fatty acid compositions were investigated. Furthermore, the macroparasitic infestation of oysters at offshore cultivation sites and for comparison, at nearshore wild banks, was investigated. Low infestation rates or even a complete absence of such parasites would be a major advantage for shellfish production activities and would therefore play an important role in the list of site-selection criteria for a certain region. Results showed that both oyster species grow successfully in high-energy offshore environments. Mean growth rates were similar to those measured in individuals from coastal habitats (wild banks and cultures) and the condition index revealed normal seasonal variations in both species. Survival rates of both species were extremely high. However, at one single site a high mortality rate was observed for O. edulis at the end of the experiment. Differences ... |
author2 |
Hagen, Wilhelm Buck, Bela |
format |
Doctoral or Postdoctoral Thesis |
author |
Pogoda, Bernadette |
author_facet |
Pogoda, Bernadette |
author_sort |
Pogoda, Bernadette |
title |
Farming the High Seas: Biological performance of the offshore cultivated oysters Ostrea edulis and Crassostrea gigas in the North Sea. |
title_short |
Farming the High Seas: Biological performance of the offshore cultivated oysters Ostrea edulis and Crassostrea gigas in the North Sea. |
title_full |
Farming the High Seas: Biological performance of the offshore cultivated oysters Ostrea edulis and Crassostrea gigas in the North Sea. |
title_fullStr |
Farming the High Seas: Biological performance of the offshore cultivated oysters Ostrea edulis and Crassostrea gigas in the North Sea. |
title_full_unstemmed |
Farming the High Seas: Biological performance of the offshore cultivated oysters Ostrea edulis and Crassostrea gigas in the North Sea. |
title_sort |
farming the high seas: biological performance of the offshore cultivated oysters ostrea edulis and crassostrea gigas in the north sea. |
publisher |
Universität Bremen |
publishDate |
2012 |
url |
https://media.suub.uni-bremen.de/handle/elib/467 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103084-16 |
long_lat |
ENVELOPE(156.945,156.945,61.792,61.792) |
geographic |
Imta Pacific |
geographic_facet |
Imta Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/467 urn:nbn:de:gbv:46-00103084-16 |
op_rights |
info:eu-repo/semantics/openAccess Bitte wählen Sie eine Lizenz aus: (Unsere Empfehlung: CC-BY) |
op_rightsnorm |
CC-BY |
_version_ |
1766393450305945600 |