in the previous post, common perch, Perca
fluviatilis, do not respond to sounds of the rattling wobblers. In this post,
we will show that perch ignore also sounds of the glass rattles mounted in the
soft plastic lures.
fish do not respond to sounds of rattling wobblers
In these field experiments, noisy and
quiet 5 cm Bobby Garland Baby Shads, Cajin Cricket color (Fig.1), were
compared. One half of lures, marked BSN, were equipped with the eye-like double
flanged glass rattles. They were made of glass tubes of 3 mm diameter, with 1
steel ball (like products of Rattle Arsenal Co.). In the other half of lures,
marked BSQ, balls in the rattles were made of the silent graphite. Both flanges of the rattle,
mounted perpendicularly into the Bobby Garland Baby Shads’ body, looked like
the real eyes.
Bobby Garland Baby Shad (shown without an inserted eye-like glass rattle)
presentations, typical drop shot rigs, with the 30 cm distance
from lures to 10 gr standard bell like lead sinkers, were used. The two rigs fell into the two holes (10 cm
diameter) drilled (at the distance of 20 cm between holes’ centers) in the ice.
The depth at the fishing localities (the region of Kyiv, Dniepro river) was
about 3-5 m, usually with weak underwater flows. Sinkers fell to the bottom, then
lures were alternately jolted by an ice rod tip: 2 jolts per sec with an
amplitude of 1-2 cm. Jolting (without lifting the sinkers) lasted 10 sec for
one lure then 10 sec for the other lure, with some minute rest between one
minute alternate joggles.
tests, perch ignored unactive lures choosing noisy or quiet jolted lures.
Therefore, we used the sign test for statistical processing of the field
findings. In total, 31 perch were iced during 1 day: 17 on BSN and 14 on BSQ.
According to the sign test, these differences are statistically unreliable. In
other words, perch ignored sounds of the glass rattles mounted in the soft plastic lures.
results, that is the absence of preference, have been obtained in the other 3
sessions with the foregoing lures (but with the two new colors: Pearl & White as well as Crystal) carried out in similar fishing conditions.
Importantly, acoustic noises under the ice are much less than in the summer (due
to the absence of waves, rain and acoustic activity of many animals: Protasov,
several reasons why perch ignore sounds of the glass
rattles. For more information, please see the post mentioned above.
V.R. 1965. The bioacoustics of fishes. Moscow,