New Zealand Journal of Marine and Freshwater Research abstracts

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Identification of hybrids between koi (Cyprinus carpio) and goldfish {Carassius auratus)

S. PULLAN¹

P. J. SMITH²

^1.Fisheries Management Division Ministry of Agriculture and Fisheries P. O. Box 3437 Auckland, New Zealand

²Fisheries Research Centre Ministry of Agriculture and Fisheries P. O. Box 297 Wellington, New Zealand

Abstract Six fish collected from an ornamental pond in Tauranga were identified as hybrids between koi (Cyprinus carpio) and goldfish (Carassius auratus) by using meristic, morphometric, and electrophoretic characters. The hybrids were intermediate between koi and goldfish for the number of lateral line scales, the shape of the pharyn-geal teeth, and the presence of a pair of reduced posterior barbels. At fifteen diagnostic enzymatic and protein loci which distinguish koi and goldfish, the hybrids appeared as heterozygotes. The close similarity of the six fish in meristic, morphometric, and electrophoretic characters suggests they were derived from the same parents.

Keywords hybrids; koi; fancy carp; Cyprinus carpio; goldfish; Carassius auratus; meristics; mor-phometrics; electrophoresis

New Zealand Journal of Marine and Freshwater Research, 1987, Vol. 21: 41-46 0028-8330/87/2101-0041$2.50/0 © Crown copyright 1987 Received 6 March 1986; accepted 2 July 1986 Fisheries Research Publication 561

PDF file of entire paper: medium quality (412K); (scanned from paper original: notes about this process)

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