Comparison of feeds containing conventional and non-conventional feedstuffs for milkfish (Chanos chanos Forsskal) in modified extensive culture system

Date of Publication

1999

Document Type

Master's Thesis

Degree Name

Master of Science in Biology

Subject Categories

Biology

College

College of Science

Department/Unit

Biology

Thesis Adviser

Wilfredo Y. Licuanan

Defense Panel Chair

Milagros L. Relon

Defense Panel Member

Jose Santos Carandang, VI

Corazon B. Santiago

Abstract/Summary

A randomized complete block experiment on feeding milkfish (Chanos chanos forsskal) with formulated diets containing locally available conventional and non-conventional sources of protein is conducted in Rebokon, Zamboanga del Sur, Philippines.Main feedstuffs used in the diets were: local fishmeal, soya meal, Leucaena leucocephala (ipil-ipil) leaf meal, Manihot esculenta (cassava) leaf meal, and ricebran. The milkfish were fed isonetrogenously for 90 days starting at the 109th day of culture (DOC) up to 208 DOC at 4.0 percent fish biomass. The pelletized feed was formulated to be cheap (Feed X=PhP9.12/kg Feed Y=PhP8.92/kg) with low protein levels (Feed X=23.3 percent CP Feed Y=23.8 percent CP). The control diet was a high protein commercial feed (Feed Z=37.3 percent CP) at PhP25.00/kg. Fish on Feeds X, Y, and Z had final mean body weights of 265 plus-minus 4.8, 259 plus-minus 6.1, and 274 plus-minus 6.5g, respectively. Weight gain of fish on Feeds X (156 plus-minus 4.8g) and Y (150 plus-minus 6.1g) was significantly lower (p0.05, n0.05). Average of fish produced by Feed X per treatment/replicate (3 987 plus-minus 72.4g) was similar to Feed Y (3 888 plus-minus91.0g), while fish produced by Feed Z (4 119 plus-minus 97.7g) was significantly higher. The total supplemental feeds (g) given per treatment/replicate were: Feed X, 9 007 plus-minus 678 Feed Y, 8 151 plus-minus 129 and Feed Z, 4 902 plus-minus 36, respectively.

Significant differences were observed in feed conversion ratio (FCR), i.e. Feed X and Y had significantly higher (p0.05) than Feed Z. In protein efficiency ratio (PER), Feed Z was significantly higher (p0.05) than both Feed X and Y, but no significant difference between Feed X and Feed Y. The study has concluded that a diet producing lesser growth was a diet producing greater profit-Feeds X and Y are more cost-effective than Z.

Abstract Format

html

Language

English

Format

Print

Accession Number

TG02937

Shelf Location

Archives, The Learning Commons, 12F Henry Sy Sr. Hall

Physical Description

70 leaves

Keywords

Bangus culture; Milk-fish (Bangus); Fishes-- Feeding and feeds

This document is currently not available here.

Share

COinS