When fishing in British waters, there are many different fish species. However, most of them has similar appearances. For instance, a roach and a rudd can look extreme similar, as can a dace and a bleak.
The difference between these types of fish are subtle. However, closer scrutiny of the shape of the fins of these fish will reveal the difference between each species. Fish can be identified by looking at the body shape of the fish.
How to Identify Fish in British Rivers
Fish with torpedo shaped bodies and powerful tails is used to swimming against strong currents in their environment. Salmon and barbel species has these body shapes to aid them in swimming against more powerful currents in the rivers where they live. Conversely, fish with deep bodies that are laterally compress is used for maneuverability in areas with little current and abundant aquatic plant.
Bream and tench has deep bodies that allow them to maneuver in areas with plants, but they are unable to swim good in areas with strong currents. Consequently, fish with deep bodies is rarely spotted in the middle of fast river. Another physical characteristic that can be used to identify fish is the shape of the mouth.
Fish with downward pointing mouths use there teeth to feed on the bottom of the water. Conversely, fish with upturned mouths use there teeth to eat insects that live on the surface of the water. For instance, you can identify the difference between a bleak and a gudgeon by looking at the mouth of each species.
The shape of a fishs mouth tells the reader about the diet of that species and the way in which it live in its habitat. Small fish species, such as minnows and stone loach, performs an essential function of the river ecosystem. Minnows and stone loach species transforms invertebrates into protein that other predators in the river consume.
Thus, a high population of these two species indicate healthy water in the river. The time of year when fishing occurs in British waters also has an impact on the fishing experience. The different season determine the diet of the fish and the laws that relate to the catching of the fish.
For instance, in the spring, there is a close season for rivers because this close season allow the fish to spawn. Additionally, during the autumn months, fish predator like pike eat more food because the water temperature begin to drop. One of the major impacts of the introduction of invasive species into British waters is the impact on the balance of the rivers ecosystem.
One example of such an invasive species are the signal crayfish. These invasive crayfish carry a disease that impact the native white clawed crayfish. Additionally, signal crayfish compete with native crayfish for food resource, but they also destroy the river bank where they burrow into the bank of the rivers.
A healthy river in Britain contains the biological and ecological component necessary for the river’s stability. These components include a balanced ecosystem within the river habitat. Fish can be correctly identified by examining the texture of the scales that cover the fishs body, the number of barbels that surround the fishs mouth, and the color of the fishs fin.
Many people make mistake when identifying species of fish because they rush the process of identification. People should of take the time to examine the different feature of the fish to correctly identify the species of fish. Examining the shape of the body of the fish can help people to identify the species of fish.
