The effects of dietary algal and lipid supplements on the gonadal and larval development of Crassostrea gigas kumamoto (Thunberg) Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/z603r259p

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Under laboratory conditions, elevated temperatures accelerated production of gametes. However, when conditioning for spawning at elevated temperatures was initiated early in the season (January-March), larval survival and number of spat collected were significantly lower than when conditioning was initiated in may or June. At elevated temperatures, broodstock oysters were fed on algal or lipid supplements consisting of menhaden oil, egg phosphatidylcholine and partially hydrogenated vegetable oil (Kaomel, Durkee) in the ratio (by weight) 5:2:3. Oysters fed on supplemental algae or lipid mixtures during conditioning resulted in larger numbers of eggs than non-fed broodstock oysters. After conditioning from March to early April, the proportion of spat was higher in progeny derived from algal- or lipid-supplemented broodstock compared to that from non-fed oysters. The same conditioning treatments initiated in May resulted in no change in the percent of spat collected. Supplemental feeding had no effect on the fatty acid composition of broodstock oysters, but it affected the fatty acid profile of eggs. The w3 fatty acid content was significantly higher in the eggs from algal-supplemented oysters than in eggs from lipid-supplemented or non-fed broodstock oysters. Enrichment of the w3 fatty acid composition of the eggs from algal- supplemented oysters probably increased the success rate in egg development and metamorphosis. The effects of supplemental feeding on broodstock were similar for oysters conditioned for spawning in either flow-through or recirculating systems. The optimum temperature for larval rearing varied from 24 to 28C and optimum salinity ranged from 20 to 3096.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Language
File Format
File Extent
  • 711900 bytes
Digitization Specifications
  • Master files scanned at 600 ppi (256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 ppi (256 B&W), using Capture Perfect 3.0, on a Canon DR-9080C. CVista PdfCompressor 3.1 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2007-12-05T14:41:53Z (GMT) No. of bitstreams: 1 Robinson_Anja_M.pdf: 711900 bytes, checksum: 3406ed86c90d7499dd3e8bb19fe31dce (MD5)
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2007-12-05T14:44:55Z (GMT) No. of bitstreams: 1 Robinson_Anja_M.pdf: 711900 bytes, checksum: 3406ed86c90d7499dd3e8bb19fe31dce (MD5)
  • description.provenance : Made available in DSpace on 2007-12-05T14:44:55Z (GMT). No. of bitstreams: 1 Robinson_Anja_M.pdf: 711900 bytes, checksum: 3406ed86c90d7499dd3e8bb19fe31dce (MD5)
  • description.provenance : Submitted by Anna Opoien (aoscanner@gmail.com) on 2007-12-05 No. of bitstreams: 1 Robinson_Anja_M.pdf: 711900 bytes, checksum: 3406ed86c90d7499dd3e8bb19fe31dce (MD5)

Relationships

In Administrative Set:
Last modified: 10/23/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items