Food consumption/biomass ratios of the pelagic fish community of Lake Malawi/Niassa

Ngatunga, B.P. and Allison, E.H. (1996) Food consumption/biomass ratios of the pelagic fish community of Lake Malawi/Niassa. Naga, the ICLARM Quarterly, 19(4), pp. 36-42.

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Abstract

An empirical model relating food requirements to morphometric indices of metabolic rate was used to calculate consumption/biomass ratios (Q/B) for 16 species of fish that make the pelagic fish community in Lake Malawi/Niassa. The Q/B/year varied from 3.31 to 9.82, with the large catfish (Dinotopterus nyasensis) having the lowest and a small cyprinid (Engraulicypris sardella) having the highest Q/B ratio. Direct estimates of Q/B for four of the most abundant species, based on analysis of diel feeding patterns, ranged from 4.20 to 24.70; the extreme values in this range representing replicate studies on the same species, the predatory cichlid Rhamphochromis longiceps. Previous studies that indicated exceptionally low Q/B ratios (1.0) in pelagic cichlids from Lake Malawi are not supported by this more recent work.

Item Type: Article
Title: Food consumption/biomass ratios of the pelagic fish community of Lake Malawi/Niassa
Personal Creator/Author:
CreatorsEmail
Ngatunga, B.P.
Allison, E.H.
Journal or Publication Title: Naga, the ICLARM Quarterly
Volume: 19
Number: 4
Page Range: pp. 36-42
Date: 1996
ISSN: 0116-290X
Issuing Agency: WorldFish Center
Uncontrolled Keywords: Food consumption; Biomass; Pelagic fisheries; Mathematical models; Regression analysis; Malawi Lake; Dinotopterus nyasensis; Engraulicypris sardella; Rhamphochromis longiceps
Subjects: Ecology
Fisheries
Item ID: 9385
Depositing User: Mr William Ko
Date Deposited: 19 Oct 2012 08:45
Last Modified: 19 Oct 2012 08:45
URI: http://aquaticcommons.org/id/eprint/9385

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