Food resource utilization partitioning of fifteen fish species at Bukit Merah Reservoir, Malaysia View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1988-01

AUTHORS

Yap Siaw-Yang

ABSTRACT

Statistical and mathematical models have been used to measure the subtle differences in food resources utilisation of fifteen (15) fish species at Bukit Merah Reservoir, Malaysia. The models employed are niche breadth, dietary overlap indices and discriminant analysis. A diet measure based on the relative importance index of food items was used for the analysis, to correct for biases of the single indices consisting of the volumetric, numerical and occurrence frequency. Niche breadth (Bi) indicating the diversity or breadth of the food resource gradient utilized by a fish classifies species as generalized feeders (Bi > 4.5), intermediate and specialized feeders (Bi < 2). Niche overlap (Oij) quantifying the sharing of food resource between two species varies from 0.07 to 0.81 and describes high dietary overlap (Oij > 0.60) for most fish at the reservoir; but Trichogaster pectoralis (Anabantidae) feeding on the plankton shows relatively low dietary overlap. A scatter plot and a territorial map of the discriminatory analysis on the dietary composition result in combination an objective basis for trophic classification of the fish community, and describe (1) Osteochilus hasselti and Puntius gonionotus as herbivores, (2) Oxyeleotris marmorata, Clarias batrachus, Ophicephalus striatus, Mystus planicep, and presumably Wallago leerii and Hampala macrolepidota as carnivores, (3) Puntius schwanenfeldii, Cyclocheilichthys apogon, and presumably Labiobarbus festiva as detritivores, (4) Notopterus notopterus as a generalist, and (5) Trichogaster pectoralis as a planktivore. This multivariate analysis is relatively superior to the traditional subjective method for trophic classification and discerning subtle differences objectively, though intermingling occur. More... »

PAGES

143-160

Journal

TITLE

Hydrobiologia

ISSUE

2

VOLUME

157

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf00006967

DOI

http://dx.doi.org/10.1007/bf00006967

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1006657010


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