Biologist reports logo Struble Lake

Chester County
April 7, 2004
Sampling Technique: Night Electrofishing

Biologists from the Area 6 Fisheries Management Division conducted a night electrofishing survey on Struble Lake as the first step in a planned comprehensive lake survey scheduled for 2004. Walleye and yellow perch were the only fish species targeted during this phase of the survey.

Dusk at Struble Lake
Dusk at Struble Lake

Overall the walleye catch was average when compared to other lakes in southeast Pennsylvania. During the survey the biologists captured 28 walleye per hour of electrofishing effort. In other southeast Pennsylvania lakes the average catch of walleye is 27 per hour of electrofishing effort. Although Struble Lake was average as far as the total number of walleye collected the number of larger walleye present in the population was above average. During the survey the biologists collected 27 walleye per hour that were at least 15 inches long and 19 walleye per hour that were at least 20 inches long. In southeast Pennsylvania lakes the average catch of walleye 15 inches long or longer is 20 fish per hour with 5 fish per hour being at least 20 inches long. The largest walleye collected during the survey was 25 inches long and weighed 6.6 pounds. Anglers targeting walleye should consider visiting Struble Lake.

A very nice Struble Lake walleye
A very nice Struble Lake walleye

The yellow perch population at Struble Lake was below average in both total numbers and the number of fish 10 inches long and longer. The electrofishing survey collected 31 yellow perch per hour of effort compared to a southeast Pennsylvania average of 90 yellow perch per hour of effort. Only 2 yellow perch longer than 10 inches were collected during this survey for a catch rate of 1 fish per hour of effort. The southeast Pennsylvania average is 2 fish per hour of effort. The largest yellow perch collected during this survey was 13 inches and weighed 0.9 pounds.

One of two large yellow perch collected at Struble Lake
One of two large yellow perch collected at Struble Lake

Although largemouth bass were not the targeted species during this survey a few large individuals up to 20 inches long were collected. Other fish species collected included bluegill, black crappie, channel catfish, brown bullhead, and carp. Future surveys planned for the spring and summer of 2004 will focus on the bass and panfish populations.

Fisheries Technician Bryan Chikotas with 20-inch largemouth bass
Fisheries Technician Bryan Chikotas with 20-inch largemouth bass

Interested onlookers asked questions regarding the upcoming survey
Interested onlookers asked questions regarding the upcoming survey

 
-- Dave Miko, Fisheries Biologist, Area 6

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