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TROPICAL FISH HOBBYIST 51(5) 82-90

Aquarium Science

Colour Morphs in a Queen Angelfish Holacanthus ciliaris (Perciformes: Pomacanthidae) population of St. Paul’s Rocks, NE Brazil.

Osmar J. Luiz-Júnior with photographs by the author Núcleo e Agência Ambiental, Universidade Metodista de São Paulo, Rua do Sacramento, São Bernardo do Campo, SP, Brazil, 09640-000. E-mail: osmarluizjr@ig.com.br

Abstract

Some colour variations in the Queen Angelfish (Holacanthus ciliaris) are shown in this paper. These morphs belong to an isolated population resident at Saint Paul’s Rocks, a group of small islands in the tropical central Atlantic. Some factors like homozygous following inbreeding and low genetic flow are considered the probably causes of this phenomenon.

82

January 2003

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