Show simple item record

dc.contributor.authorPimoljinda, Thanom
dc.date.accessioned2016-07-19T08:33:12Z
dc.date.available2016-07-19T08:33:12Z
dc.date.issued1977
dc.identifier.urihttp://hdl.handle.net/1834/9137
dc.description.abstractDiatoms were collected from Buyuan Bay, and from the hatchery tanks at Tigbauan, to determine the commonly occurring species, the feasibility of culturing these species, and the potential of these selected species as food for larval P. monodon. The commonly occurring diatoms were identified as Chaetoceros calcitrans, Navicula grimmei, Nitzchia seriata, Nitzchia closterium and Amphiprora sp. These diatoms were isolated and unialgal cultures prepared. Protein content analysis using the micro-Kjildahl method gave the following result: C. calcitrans, 11 . 78%; Nitzchia seriata, 25%; Nitzchia closterium, 30 . 5%; Navicula grimmei, 9 . 06% and Amphiprora sp. 8 . 96%. Feeding experiments were conducted to determine acceptability of the different diatom species and percentage survival of larval stages Z SUB-1 -M SUB-2 . Larvae were placed in 4-l capacity plastic containers with a stocking density of 10/l. The results of several feeding trials using the different mass-produced diatoms are summarized. From the data gathered, C. calcitrans appears to be the most promising candidate as feed for zoea and mysis stages of P. monodon. The average percentage survival of C. calcitrans was 63 . 76% for the 3 trials, and as high as 82 . 22% in the third trial. Comparatively high percentage survival of larvae was also recorded when Nitzchia seriata (48 . 17%) and Nitzchia closterium (67 . 6%) were given as feed, while both Amphiprora sp. and Navicula grimmei gave 0% survival. The poor results with Amphiprora sp. and Navicula grimmei may be due to their low protein content (8 . 96% and 9 . 06%, respectively) and the inability of the larvae to ingest them. Navicula and Amphiprora were observed to cling to the appendages of the larvae and to settle down in the medium making them unavailable to the larvae. Low survival was also noted when frozen C. calcitrans was used (14 . 25%). This may be due partly to the effect of the floculating agent (ALSO SUB-4 . 25 g/l) used in concentrating the diatoms. When protein contents of C. calcitrans, N. seriata and N. closterium are compared, the 2 Nitzchia species have relatively higher protein contents than C. calcitrans and, therefore, could be the more desirable feed candidates. However, few feeding trials were made using Nitzchia so that additional investigations will have to be done on this aspect.en_US
dc.language.isoenen_US
dc.relation.urihttp://hdl.handle.net/10862/2275en_US
dc.subject.otherBacillariophyceaeen_US
dc.subject.otherPenaeus monodonen_US
dc.titleIdentification and culture of common diatoms as possible feed for Penaeus monodonen_US
dc.typeJournal Contributionen_US
dc.bibliographicCitation.issue1en_US
dc.bibliographicCitation.titleSEAFDEC Aquaculture Department Quarterly Research Reporten_US
dc.bibliographicCitation.volume1en_US
dc.description.statusPublisheden_US
dc.format.pagerangepp.4-5en_US
dc.subject.asfaPhytoplankton cultureen_US
dc.subject.asfaFood organismsen_US
dc.subject.asfaCrustacean cultureen_US
dc.type.refereedNot Knownen_US
refterms.dateFOA2021-01-30T18:48:18Z


Files in this item

Thumbnail
Name:
PimoljindaT1977.pdf
Size:
969.7Kb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record