Premium
Functional Morphology of the Olfactory Organs in the Spiny Dogfish ( Squalus acanthias L.) and the Small‐spotted Catshark ( Scyliorhinus canicula (L.))
Author(s) -
Theisen Birgit,
Zeiske Eckart,
Breucker Haide
Publication year - 1986
Publication title -
acta zoologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.414
H-Index - 37
eISSN - 1463-6395
pISSN - 0001-7272
DOI - 10.1111/j.1463-6395.1986.tb00851.x
Subject(s) - scyliorhinus canicula , biology , squalus acanthias , spiny dogfish , anatomy , olfactory system , olfactory epithelium , olfactory receptor , olfactory receptor cell , olfaction , fishery , ecology , endocrinology , neuroscience , fish <actinopterygii>
The morphology of the olfactory organs in two sharks, the spiny dogfish and the small‐spotted catshark, was studied by light microscopy and electron microscopy (TEM and SEM). The olfactory epithelium is arranged on olfactory lamellae which are provided with secondary folds. The epithelium mainly consists of microvillous receptor cells, multiciliated supporting cells and basal cells. The find of only one type of receptor cells, the microvillous type, is discussed and the condition considered a derived (apomorphic) character. The route of the water current through the olfactory organ and the different driving forces of the ventilation process are subject to discussion. In both the pelagic dogfish and the bottom‐dwelling catshark the pressure difference between the incurrent and excurrent nostrils achieved by active swimming appears to be the driving force, whereas the role of the beating of the non‐sensory cilia is not evident. In the bottom‐dwelling catshark the ventilation of the olfactory organ is also supported by the respiratory activity.