A cost-effective, easily portable barrier that prevents drainage cuts in beaver dams from being repaired could offer temporary relief from beaver-created floodwater.
Humans have been using rotenone for centuries to harvest fish and manipulate fish communities.
Many landowners are building and stocking new ponds, as well as re-stocking old ponds that dried up, with fish to increase water reserves and provide fisheries for family enjoyment or income. It's good to take time to consider all of the values that ponds have to offer before actually beginning the dirt work.
A fish kill caused by dissolved oxygen (DO) depletion can be a catastrophe for pond managers. Fish kills can occur any time the DO demand is greater than the water can supply - but managers can take steps to avoid such an event in their ponds.
Standardized measurement of water clarity helps monitor changes that can affect production of fish and aquatic plants, and a Secchi disk is a simple, standard tool used to measure clarity.
Hybrid fishes occur naturally and are raised in hatcheries. Many hybrids have lower fertility but seem to exhibit better growth rates and catchability than the parent species.
Three species of bullhead catfishes occur in Oklahoma and Texas: black bullhead, yellow bullhead, and brown bullhead. Bullheads provide many hours to enjoyment to anglers, especially beginning fishermen. However, they compete directly with channel catfish and sometimes cause water turbidity problems.
We receive several summertime calls from fishermen asking about fish infested with parasites. Most often, they are concerned about identification of the parasite and the safety of eating parasite infected fish. The most frequently observed parasites are flukes (grubs) in the larval stage, commonly seen on largemouth bass, bluegill, catfish, and other fishes.
Whether aquatic vegetation causes problems or not depends on the goals for the pond, the types of vegetation present, and the amounts of vegetation present. For most pond goals, it is very desirable to have some aquatic vegetation present.
Many pond owners in Oklahoma are interested in Florida largemouth bass because they tend to grow larger than northern largemouth bass (Figure 1). During the 1970s and early 1980s, fisheries...