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Two species of fish seen in Sarısu, one of the streams in the İnönü district, make scientists nervous. The first species of fish to be seen is called Clarias batrachus (walking catfish). This fish is considered one of the 100 most dangerous ecological creatures in the world. Prof. Dr. Emiroğlu and his teammates determined that this species came from Indonesia with the article they made this year.
The fish, believed to have been brought from Indonesia, began to adapt and multiply in a short time due to the warm water. This species of fish is also known for its ability to walk on land while causing destruction to the water. Another species of fish found in the water is the stingray species that is estimated to have been brought from the Amazon and also lives in aquariums. This species remains immobile for a long time when it is removed from the water. When put back into water after a long time, it comes to life. These fish also reduce the quality of the water. Hence, local fish species are negatively affected.
“THIS SPECIES OF FISH CAN ALSO WALK IN THE FIELD”
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Speaking about fish species, Eskişehir Osmangazi University Department of Biology Faculty member Prof. Dr. Özgür Emiroğlu spoke mainly about the walking catfish. Speaking about the characteristics of the fish and the damage it causes, Prof. Dr. Özgür Emiroğlu said: “There are invasive and foreign fish species that we detected here in 2015. One of them is a species that we call Clarias batrachus (walking catfish). It is described as one of the 100 most dangerous ecological creatures in the world. This fish is normally of South Asian origin. We have prepared the article, we have determined that Indonesia brought to Turkey. brought the trade with Turkey to the aquarium and then left our water here. Since the water source in this region is temperate, the fish have adapted here. They cause serious damage to the natural population. One of the most important characteristics of these fish is that they can walk on land. They can stay on land for a long time because their fifth gills are branched. It works like a lung and can stay grounded for a long time. We can define it as one of the creatures that destroy our waters. These fish nest at the edges of the waters. They leave offspring here, and after the young emerge, the nests remain hollow. After a while, the edges begin to sink into the water. Therefore, the speed of terrestrialization of our streams increases. Besides eating fish here, they consume all organic substances. They leave a lot of organic waste. Local fish in the environment continue their life without damaging and polluting the water while they live. However, as these fish upset this balance, our water is seriously polluted and exposed to a load of organic matter. Since these fish depend on warm water, they did not descend to the downstream basins, they were only distributed in a narrow area. However, as the temperature of the waters increases with the current climatic changes, it will be possible for these fish to decrease. “
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“THEY MAY BE OUT OF THE WATER FOR A LONG TIME”
Speaking about the species of rays seen in the water, Emiroğlu said the following about fish in the rest of his speech:
“Another type of fish here is the ray fish. These also appear as fish of Amazonian origin. This fish brought to the aquarium was also thrown into the water. They have built a significant population here. We know that these two species have been living here since 2015. We see that they reproduce in very serious numbers. These fish can stay out of the water at rest for a long time. They consume a large amount of organic matter and then produce it. They affect the quality and availability of water. They have a negative impact on biodiversity. We must not leave the fish brought to the aquarium in our natural waters under any circumstances. We must prevent foreign species from entering our country. “
