To achieve high resolution in measuring chemical stimulus
distributions, we employed a customized, computer-based microprobe system (Model IVEC 10, MedSystems; see further details in Moore et al.
This is one of the first papers to show (a change in testosterone) in response to a chemical stimulus
," said Jim Roney, a scientist at the University of California, Santa Barbara.
The visual stimulus of egg capsules attracts males to the eggs, and when the males touch the eggs, they encounter a chemical stimulus
that leads to highly aggressive fighting behavior.
More recently, researchers have come to realize that a chemical stimulus
contains much more information than that.
Possibly the chemical stimulus
that caused the urchins to move away from the gonad extract originated in the germinal epithelium or in the nutritive phagocytic tissue.
1 cm/s), but rapidly decayed in the absence of flow (because there was no polarization for chemical stimulus
to direct locomotion) and at flow speeds [geq] 4 cm/s (transitional to rough-turbulent bottom boundary layer, [u.
Crustacean feeding responses are often evaluated in terms of one specific defining act in response to a chemical stimulus
In trials with a chemical stimulus
, the source was placed in a position (x = 0 cm, y = -45 cm) that allowed the sea star to move both toward and away from the stimulus by several body lengths and prevented accidental contact with the source if the animal was only following the contours of the tank walls.