Crystal Lake presently is receiving very little management other than regular monitoring of the fish population through scheduled surveys and assessments. The only fish species currently being stocked is Hybrid Muskie (TME). Hybrid Muskie management began in 1984 and stocking is conducted biennially on even numbered years at a rate of 1.0 fingerlings/surface-acre (288 fish). No TME were captured in trap nets during this assessment. Only 3 Northern Pike (NOP) were captured in the trap net sample and they averaged 24.96 inches and 3.22 pounds. Yellow Perch (YEP) are present but only one individual was captured by trap nets. Black Crappie (BLC) were sampled above the median level for abundance , but below the median level for mean weight, in trap nets. The average BLC captured was 7.63 inches in length and 0.27 pounds. Approximately 13.0 percent of all BLC sampled measured 8.0 inches or longer with the largest individual captured measuring 12.64 inches. Bluegill (BLG) were sampled above the third quartile level for abundance in trap nets and below the first quartile level for mean weight. The average size of BLG in the trap net sample was 5.32 inches in length and 0.11 pounds. Only 2.6 percent of all BLG sampled measured 7.0 inches or longer, with the largest individual captured measuring 9.41 inches in length. Growth rates for BLG and BLC were found to be near average. Pumpkinseed Sunfish and Hybrid Sunfish are also very common in the lake with some respectable sized individuals present. Largemouth Bass (LMB) also appear to have a significant presence in this lake as they were sampled near the median level for abundance in trap nets. The average size LMB sampled was 17.34 inches long and 3.23 pounds. While no electrofishing was conducted during this assessment, local anglers report some quality LMB fishing in this lake.
- Eurasian Watermilfoil
Recreational activities such as recreational boating, angling, waterfowl hunting, and diving may spread aquatic invasive species. Some aquatic invasive species can attach to boats, while others can become tangled on propellers, anchor lines, or boat trailers. Many species can survive in bilge water, ballast tanks, and motors or may hide in dirt or sand that clings to nets, buckets, anchors, and waders. Fortunately, completing simple steps can prevent the transport of aquatic invasive species.