MCWC begins posting educational signage prohibiting nonnative fish transport
Non-native fish introduced into the Colorado River mainstem negatively impact native fish through predation and competition for resources. Moving these nuisance species poses severe threats to public fisheries, damages the environment, and raises ethical concerns. Working with Colorado Parks and Wildlife (CPW), MCWC is updating and installing signage to be placed near gravel pits, public ponds, and other water bodies.
Raising awareness and encouraging responsible behavior will protect our lakes, streams, and rivers by updating and installing educational signage. Fish transplantation, whether intentional or unintentional, has become a significant concern for the health of aquatic ecosystems. Live bait and aquarium fish are often released into natural bodies of water, leading to imbalances in local ecosystems. This not only affects the existing fish populations but also poses a threat to the overall biodiversity of these environments.
One significant consequence is the potential alteration of the entire aquatic food web. Nonnative fish species, with their different feeding habits and reproductive strategies, can outcompete native species for resources, leading to a decline in the populations of native fish. This shift can have a domino effect on other species within the ecosystem, affecting not only aquatic life but also the various bird and mammal species that rely on a balanced aquatic environment for their survival.
Another unintended consequence involves the impact on angler satisfaction. Fisheries often attract anglers seeking diverse and rewarding recreational experiences. The introduction of nonnative fish, even with the intention of enhancing fishing opportunities, can result in a shift in the composition of fish populations. This alteration may lead to changes in the size and quality of catches, potentially reducing the satisfaction of anglers.
MCWC’s first sign installation locations at reservoirs and ponds with public access were selected with input from CPW. The signage used a CPW format that was updated with current information. MCWC ordered 30 signs and placement begin in the fall of 2023 at four locations using the help of CPW and New Castle city staff: Rifle Gap, Harvey Gap and New Castle’s Alder and Grand River Parks.
Other areas already designated to receive signage include: Parachute Pond State Wildlife Area, Lions Park in Rifle, and Silt Preserve. Current outreach to gravel pit operators and ponds from previous gravel pit operations will be another opportunity to post signage.
Please contact MCWC at admin@midcowatershed.org if you have locations you would like considered for signage