2001) showed that the effect of current velocity on the clearance of Mytilus edulis depends on the orientation of the inhalant siphon
in relation to current direction.
They have two siphons--an inhalant siphon
that they use to pull water into their bodies, and an exhalant siphon that they use to expel water and wastes.
The most obvious is by orienting the inhalant siphon into the flow and the exhalant siphon away from the flow.
This unstalked ascidian has its inhalant siphon directed horizontally and its exhalant siphon higher and directed vertically (Fig.
The orientation of the ascidian, defined as the direction of the axis running from the exhalant to the inhalant siphon, was measured to the nearest 5[degrees] using a magnetic compass.
The inhalant siphon
transports seawater containing dissolved oxygen and suspended microalgae, which is pumped via the ciliated ctenidia (gills), whereas the exhalant siphon expels rejected food particles and pseudo feces (Feldman et al.
schlosseri is unknown, but there are at least two possible points of entry (Ryland and Bishop, 1993): sperm enter through the inhalant siphon and cross the pharyngeal basket to reach the eggs, or sperm enter through the exhalant siphon and then swim to the eggs.
The sexual cycle includes the internal fertilization of the mature eggs soon after the inhalant siphons open (Milkman, 1967); the continuous release of sperm starting 16 h later (Stewart-Savage and Yund, 1997); and the brooding of developing embryos, which are released just before the zooids degenerate at the end of the cycle (Milkman, 1967).
Inhalant siphons are formed early in the takeover process, but the common exhalant siphon of a system generally does not form until near the end.
Eight mussels (4 mussels per trial with two replicates; n = 8) were attached to the vertical posts in the 4 feeding chambers using Velcro[TM] so that their exhalant siphons were oriented toward the camera lenses, with the inhalant siphon
facing into the flow of water and the exhalant siphon facing downstream to prevent any recirculated water from entering the inhalant siphon
ABSTRACT To study the process of regeneration and its effect on the morphology of the inhalant siphon of a tellineacean bivalve, Donax denticulatus, individuals were artificially amputated and placed in aquaria under laboratory conditions, in the absence of predators.
Pekkarinen (1984) also registered significant growth rates differences in individuals of Macoma balthica, a tellinacean bivalve, when inhalant siphon was removed.