ON behalf of Michael Fine let me please inform you about the following article:
Javier S. Tellechea, Walter Norbis, Daniela Olsson and Michael L. Fine (2011):
Calls of the black drum (Pogonias cromis: Sciaenidae): geographical differences
in sound production between northern and southern hemisphere populations. J.
Exp. Zool. 315A (1), 48-55.
Abstract: Because of apparent reproductive isolation between Northern and
Southern hemisphere populations of the black drum Pogonius cromis, we tested
the hypothesis that advertisement calls from a southern population would differ
from known calls of North American populations. Additionally, we quantified
disturbance and advertisement calls, their changes with fish size and sex, not
previously examined in this species. Unlike most sciaenids, both sexes of P.
cromis possess robust sonic muscles, and both produce disturbance calls when
handled. However, only males produce an advertisement call used in courtship.
The disturbance call consists of a variable train of short-duration pulses
(average 23âms). The duration, interpulse interval, and dominant frequency of
pulses are similar in males and females and change developmentally: pulse
duration and interpulse interval increase and dominant frequency decreases with
fish size. Advertisement calls, recorded in the field and in captivity, are
long-duration (average 184âms) and tonal. Based on variation in fundamental
frequency, which decreases with fish size, field choruses are composed of
different-sized individuals. The duration of advertisement calls, about a third
of those from Florida populations, suggests genetic differentiation between
northern and southern populations.
For reprints please contact: Javier S. Tellechea (email:
Dr. Sonja Amoser