Biological evaluation of three phytoplankton species (Chlorella sp., Tetraselmis sp., Isochrysis galbana) and two zooplankton species (Crassostrea iredalei, Brachionus plicatilis) as food for the first-feeding Siganus guttatus larvae
MetadataShow full item record
First-feeding Siganus guttatus larvae were given different species of phytoplankton (Chlorella, Tetraselmis, Isochrysis) and zooplankton (oyster trochophores, Brachionus) or a combination of both on the first day when they can feed. None of the phytoplankton species when used as the only food source for the larvae could support life beyond four days from hatching. Brachionus of sizes less than 90 microns was the most suitable food for the first-feeding larvae. A food mixture of the three phytoplankton species and Brachionus resulted in survival rates that were significantly higher than with other treatments. Larval growth, however, did not differ significantly (p>0.05). Different Brachionus densities were also used during the first-feeding days. Although the range of 10 to 15 Brachionus per ml gave better survival, no significant difference existed. Growth was slightly greater but not significantly different at higher densities.
Contribution No. 196 of the Aquaculture Department, SEAFDEC.
CitationDuray, M. N. (1986). Biological evaluation of three phytoplankton species (Chlorella sp., Tetraselmis sp., Isochrysis galbana) and two zooplankton species (Crassostrea iredalei, Brachionus plicatilis) as food for the first-feeding Siganus guttatus larvae.
PublisherUniversity of San Carlos
Showing items related by title, author, creator and subject.
Conference paperS Sahavacharin - In TU Bagarinao & EEC Flores (Eds.), Towards sustainable aquaculture in Southeast Asia and Japan: Proceedings of the Seminar-Workshop on Aquaculture Development in Southeast Asia, Iloilo City, Philippines, 26-28 July, 1994, 1995 - SEAFDEC Aquaculture DepartmentCoastal aquaculture in Thailand has expanded rapidly in both area and production in the last decade. The important cultured species are the shrimps (Penaeus monodon and P. merguiensis), sea bass Lates calcarifer, groupers Epinephelus malabaricus and E. tauvina, green mussel Perna viridis, horse mussel Modiolus senhausenii, blood cockles Anadara granosa and A. nodifera and the oysters Crassostrea belcheri, C. lugubris and Saccostrea commercialis. The total production from coastal aquaculture in 1991 was 230,444 tons, consisting of 70.3% shrimp, 28.8% mollusks, and 0.9% fishes. The seaweeds Gracilaria spp., pearl oysters, scallops, and abalones are cultured on a pilot scale in some places. Hatchery technologies have recently been developed for groupers, oysters, scallops, and abalones. Expanded aquaculture has had some adverse effects on the environment and has also suffered from the environmental changes and conflicts due to other sectors using the same water and other resources.
Conference paperA Young & E Serna - In FB Davy & M Graham (Eds.), Bivalve culture in Asia and the Pacific: proceedings of a workshop held in Singapore, 16-19 February 1982, 1982 - International Development Research CentreNatural populations of oysters and mussels have long been gathered for food by coastal communities in the Philippines, and bivalve farming began in early 1900. The first farms were no more than a series of bamboo poles inserted in the muddy bottom of Manila Bay in Bacoor Cavite. In May 1934, the Bureau of Fisheries and Aquatic Resources (BFAR) established a pilot oyster farm in Binakayan, Cavite Province, Luzon, and a lucrative industry soon grew up. By 1950, about 200 ha of private farms existed in Bacoor Bay, but, in the late 1950s, mussels appeared on the farms and threatened the industry. The response of BFAR was to initiate farms for mussels, and the results prompted the establishment of a mussel industry that proved to be at least as lucrative as the oyster industry. Farming of windowpane oysters (Placuna placenta) began in the late 1940s in the tide flats of Bacoor Bay, the delicate, translucent Placuna shells being used for window glazing and shellcraft. In the early 1970s, however, the bay became increasingly polluted, the stocks could not survive, and they are still not found in the waters of the bay.
ArticleM Sekino, H Ishikawa, A Fujiwara, EFC Doyola-Solis, MJH Lebata-Ramos & H Yamashita -
Fisheries Science, 2015 - Springer VerlagWith a combination of our mitochondrial and nuclear DNA data, we evidenced the occurrence of a Crassostrea oyster hitherto unrecognized in Japan. This species, C. dianbaiensis (named Sumizome-gaki in Japanese), was very recently described as a new “tropical” oyster, although we located it in a temperate water zone (southwestern coast of Shikoku Island, Japan). Our specimens bore a morphological resemblance to the slipper cupped oyster C. bilineata (syn. C. iredalei), consistent with their close phylogenetic relationship. Some of the shell characteristics represented in the original species description were not applicable to our specimens, especially in terms of the pattern of their inner-shell coloration. Our novel finding of C. dianbaiensis in Japan updated the taxon list of Japanese Crassostrea species.