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A Combined Field Study of Barbus (= Puntius) Nigrofasciatus GÜNther (Pisces, Cyprinidae) and Water Chemistry of Its Habitat in Sri Lanka

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image of Netherlands Journal of Zoology
For more content, see Archives Néerlandaises de Zoologie (Vol 1-17) and Animal Biology (Vol 53 and onwards).

This paper is part of a series dealing with the biology and behaviour of Sri Lanka Cyprininae (DE SILVA & KORTMULDER, 1977; DE SILVA, KORTMULDER & WIJEYARATNE, 1977). The present paper investigates the natural environment (both morphologically and chemically) and the behaviour in the field of Barbus nigrofasciatus, a species formerly studied in detail in captivity. Concordance between the behaviour as observed in aquaria and in the field is nearly perfect. Predictions, based on the aquarium studies, as to the shape of the natural environment and of the movements of the fishes in it are tested in the field and found to be largely correct. The species is likely to be endangered if present trends (deforestation, fishing) continue. Further, in this paper, the assessment of pH by means of a colorimetric method is critically evaluated and corrections on the method proposed.

Affiliations: 1: ) Zoological Laboratory, Univ. ofLeiden, Leiden, The Netherlands; 2: ) Dept. of Zoology, Vidyalankara Campus, Univ. of Sri Lanka, Kelaniya, Sri Lanka


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