The polarization of inner ear ciliary bundles from a scorpaeniform fish

Abstract

The polarization of ultrastructural ciliary bundles from hair cells in the inner ear of the sea scorpion Taurulus bubalis was studied using a scanning electron microscope, revealing arrays of ciliary bundles with diverse orientations on each of the sensory epithelia. Members of this order are known to produce sound, though results of this study show no significant variation from the standard receptor patterns found in the hearing system of many silent marine teleosts. This is the first time that the ultrastructure of T. bubalis has been studied, and this work presents a new set of polarization patterns, which provide anatomical information important in understanding electrophysiological aspects of fish hearing from an ecological perspective. # 2005 The Fisheries Society of the British Isles

An investigation into the effects of underwater piling noise on salmonids

“…1, which is from a central region of the macula. The image shows apical hair cell bundles with an anterior positioned kinocilia, surrounded by approximately 40 cilia arranged in 4 to 5 consecutively shorter rows in a format common to many fish species ͑e.g., Platt and Popper, 1981;Lovell et al, 2005͒. Each hair cell is separated from neighboring cells by an area of epithelium bearing short ͑Ͻ1 m͒ microvilli.…”

The polarization of hair cells from the inner ear of the lesser spotted dogfish Scyliorhinus canicula

“…The hair cells on the ostium of the saccule, however, are divided into two fully opposing groups, rather than the slight change in polarity reported by Corwin (1981 b ). The average length of the hair cells found away from the perimeter in the ostium region of the saccular macula is c. 4 μm, contrasting with the average receptor length of c. 8 μm from the saccule of the sea scorpion Taurulus bubalis (Euphrasen) (Lovell et al , 2005 c ) and c. 6 μm from the saccule of the bass Dicentrarchus labrax (L.) (Lovell et al , 2005 b ). Short hair cells ( c. 3 μm) have also been reported in the saccule of the cartilaginous paddlefish Polyodon spathula (Walbaum) and the lake sturgeon Acipenser fulvescens Rafinesque (Lovell et al , 2005 a ).…”

“…The preparation methodology employed in this study was based on techniques used by Lovell et al (2005 c ). Four specimens of S. canicula , two males (621 mm total length, L T , 1250 g and 645 mm L T , 900 g) and two females (585 mm L T , 765 g and 560 mm L T , no mass taken) were anaesthetized using MS‐222 in a water‐bath and dispatched using the conventional protocol approved by the Marine Biological Association of the United Kingdom.…”

“…Lu & Popper (1998) examined the polarization of ciliary bundles in the end organs of the sleeper goby Dormitator latifrons (Richardson) using immunocytochemicals and a confocal imaging technique. Several authors (Corwin, 1981 b ; Popper, 1981; Platt & Popper, 1984; Yan et al , 1991; Lovell et al , 2005 a , b , c ), however, have used the scanning electron microscope (SEM) to study surface detail of the inner ear ultrastructure, and this was the approach adopted here.…”

The inner ear ultrastructure from the paddlefish (Polyodon spathula) using transmission electron microscopy

“…However several authors (e.g. Corwin, 1981; Popper, 1981; Plat & Popper, 1984; Yan et al ., 1991; Lovell et al ., 2005a,b,c) have used the scanning electron microscope (SEM) to study surface detail of the inner ear ultrastructure, and this was the approach adopted here. Internal cellular structures were studied using TEM, in accordance with Popper (1979), Saidel et al .…”