12-18-2012, 12:10 PM
The NJDEP Division of Fish and Wildlife has announced that fish survey data from Merrill Creek Reservoir suggests that it may no longer be necessary to stock lake trout since there may be enough natural reproduction to sustain the fishery without supplemental stocking. This year's stocking in early December of 1,330 yearlings averaging nine inches is 60% fewer than the normal allocation. Lake trout stocking will be discontinued after this year and the fishery will be monitored to assess the population's ability to sustain itself through natural reproduction.
Lakers have been stocked annually in this 650-acre reservoir since 1988, when it filled with water following construction. Since 1989, each year class of lake trout stocked have been marked by clipping a specific fin prior to stocking. The fin clip, which rotates among five possible fins, aids biologists in tracking the growth of individual year classes of fish. The absence of a fin clip can also aid in distinguishing hatchery-reared lakers from wild, naturally reproduced ones.
Fish survey data from recent years shows an increasing prevalence of lake trout that do not have an identifying fin clip. These fish are too small to be attributed to the first year class of fish stocked in 1988 (that were not fin-clipped) indicating they are the product of natural reproduction.
This year's annual survey of the Merrill Creek Reservoir lake trout fishery was completed by the owner's aquatic consultant in early December. Gill nets were used to capture lake trout of varying size and age. A total of 35 lake trout were captured this year and ranged from 10.8 - 30.7 inches, with the largest weighing 11.4 pounds.
Located in Warren County, Merrill Creek Reservoir is one of two reservoirs statewide that have reproducing lake trout populations. The reservoir is owned by the Merrill Creek Owners Group, and the fishery is managed cooperatively with the Division of Fish and Wildlife.
Lakers have been stocked annually in this 650-acre reservoir since 1988, when it filled with water following construction. Since 1989, each year class of lake trout stocked have been marked by clipping a specific fin prior to stocking. The fin clip, which rotates among five possible fins, aids biologists in tracking the growth of individual year classes of fish. The absence of a fin clip can also aid in distinguishing hatchery-reared lakers from wild, naturally reproduced ones.
Fish survey data from recent years shows an increasing prevalence of lake trout that do not have an identifying fin clip. These fish are too small to be attributed to the first year class of fish stocked in 1988 (that were not fin-clipped) indicating they are the product of natural reproduction.
This year's annual survey of the Merrill Creek Reservoir lake trout fishery was completed by the owner's aquatic consultant in early December. Gill nets were used to capture lake trout of varying size and age. A total of 35 lake trout were captured this year and ranged from 10.8 - 30.7 inches, with the largest weighing 11.4 pounds.
Located in Warren County, Merrill Creek Reservoir is one of two reservoirs statewide that have reproducing lake trout populations. The reservoir is owned by the Merrill Creek Owners Group, and the fishery is managed cooperatively with the Division of Fish and Wildlife.