Chemical characterization of Rhizoclonium hieroglyphicum Kuetz. growing in basaltic rock pools of volcano island in Taal Lake

Date

10-1992

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Macrina T. Zafaralla

Abstract

Rhizoclonium hieroglyphicum Kuetz. from the basal-tic rock pools of Taal Lake were evaluated for its nutritive composition as fish feed. Crude protein ranged from 4.8 to 22.7 %; crude fiber between 19.9 and 24.4 %, while the gross energy exhibited a range between T'1',S77.8 and 7!.736.8 cal/g. All of these showed significant variations within an annual cycle, while the cciii content remained virtually constant. investigated were the different physico-chemic,1 factors in Taal Lake that could influence nutritive composition of the alga. Positive correlations were sewn with water temperature and electrical conductivity, and hardness and nitrates; a negative correlation exists between salinity and transparency. Only the orthophosphate trend was seen to have a significant, positive correlation with crude pi levels. Other than this, trends of the different constituents did not have relations with each a with the rest of the water quality parameters. R. hieroglyphicum has a lower crude protein but a higher crude fiber content than conventional fish feeds. The alga then could only serve as a partial feed supplement in terms of nutritional qualities, although it can add bulk in the diet of fish.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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