Particularities of Dentition in Some Rare Salmonid Species: Danube Salmon (Hucho hucho) and Black Sea Trout (Salmo trutta labrax)

Andrada Ihuț, Daniel Cocan, Paul Uiuiu, Călin Lațiu, Gabriel Friș, Vioara Mireșan

Abstract


The purpose of this paper was to morphate-anatomically study the dentition of the Danube salmon (Hucho hucho) and Black Sea trout (Salmo trutta labrax) and its topographical distribution in the oral cavity. On the mandible there are between 40 and 50 teeth, with an average of 46 teeth. There are 9 to 16 teeth on the tongue, with an average of 12.6. In the dorsal part of the mouth, on the outside of the upper jaw their number is between 65 and 72 teeth, with an average of 69.6 teeth. On the medial line of the upper jaw, there are between 37 and 46, with an average of 40.1 teeth. The Black Sea trout have teeth similar in shape, conical and sharpened at the tip. The teeth are prehensile, oriented aborally, on all segments of the mouth, less on the withers, where the alternating sides are oriented medio-laterally. There are 28 teeth on the jaw and 10 teeth on the surface of the tongue. In the upper part of the mouth there are 33 teeth on the upper jaw line, 33 teeth on the upper jaw line 24, and 13 teeth on the vertebra, the total number being of 108 teeth. Morphological characters, mood and teeth orientation clearly reflect the predatory character of salmonids. Of the two studied species, the largest number of teeth is found in Danube salmon, in terms of total number, and each segment of the oral cavity. In Danube salmon we also find that it has no teeth on the vomer, compared to Black Sea trout species, where we emphasiz the presence of teeth.


Keywords


Danube salmon, Black Sea trout, dentition, morphology, anatomic topography.

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