Pug-headedness in the farmed triploid Atlantic cod, Gadus morhua Linnaeus, 1758 (Actinopterygii: Gadiformes: Gadidae) in Norway
A farmed triploid pug-headed specimen of the Atlantic cod, Gadus morhua measuring 501 mm TL was obtained from IMR Parisvatn Field Station, Norway. The abnormal specimen had the following aberrant characters: short neurocranium and upper jaw, very short snout in comparison with the normal specimens,...
| Main Authors: | , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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Institute of Oceanography and Fisheries
2015
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| Online Access: | https://hrcak.srce.hr/152260 https://hrcak.srce.hr/file/443816 |
| Summary: | A farmed triploid pug-headed specimen of the Atlantic cod, Gadus morhua measuring 501 mm TL was obtained from IMR Parisvatn Field Station, Norway. The abnormal specimen had the following aberrant characters: short neurocranium and upper jaw, very short snout in comparison with the normal specimens, and asymmetrical upper and lower jaws. The right side of the head and the pre-maxilla were deformed, twisted downward and forward. The lower jaw was slightly distorted to the left. Causes for such aberrations are discussed. Uzgojeni triploidni primjerak bakalara, Gadus morhua, s deformacijom glave, ukupne duljine 501 mm je ulovljen u blizini Instituta za istraživanje mora kod Parisvatn terenske postaje u Norveškoj. Abnormalni primjerak je imao sljedeće neprirodne znakove: kratki neurokranij (koštani pokrov mozga), i gornja čeljust, vrlo kratka gubica u usporedbi s normalnim primjercima, te asimetrična gornja i donja čeljust. Desna strana glave i gornja vilica (premaxilla) su deformirani, izvrnute su prema dolje i naprijed. Donja vilica je blago iskrivljena ulijevo. U radu se raspravlja o uzrocima takvih odstupanja. |
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