Received: 1993 Mar 15; Revised: 1993 May 03 The reported range
of the spotted sucker (Minytrema melanops) extends roughly
through the eastern half of Oklahoma (1). The only collections
from a more western longitude were from the Colorado River
drainage in Texas (2). In 1991, we captured and released a
single adult specimen during an electrofishing survey of Lake
Lawtonka in Comanche County of southwest Oklahoma. Subsequent
review of Oklahoma Department of Wildlife Conservation (ODWC)
records revealed that spotted suckers have been taken
sporadically from Lake Lawtonka since at least 1952. Spotted
suckers were collected from Lake Lawtonka in a ten-hectare
rotenone survey by the ODWC in 1952 (unpublished data-no sizes
given). Spotted suckers were also killed in a lake-wide fish
eradication effort in 1953 (3). In 1973, a single immature
spotted sucker (total length = 203 mm, weight = 104 g) was
collected in a cove-rotenone survey of lake Lawtonka (4), and
one adult (356 mm, 482 g) was collected by rotenone use i