Ardelean, Gavril (szerk.): Satu Mare. Studii şi comunicări. Seria ştiinţele naturale 2-3. (2001-2002)
Ecologie şi protecţia mediului
I Satu Mare-Studii şi comunicări | Voi. II-1II - Ştiinţele naturii | pp. 269 - 273 1 Mai 2001-20021 ORNITHOLOGICAL REASONS FOR A NATURAL RESERVATION FOUNDING IN THE ZONE OF PISCICULTURAL LAKES ARINIŞ (MARAMUREŞ) Gavril Ardelean* and Iosif Béres** *North University Baia Mare **Maramureş Museum from Sighetu Marmaţiei Argument. After editing the book “Vertebrates fauna from Maramureş” (Ardelean, and Béres, 2000), the authors set as a goal the drawing up of the monograph “Flora and fauna of Baia Mare Depression". Taking into account the fact that the bibliographic references regarding the zone’s ornithofauna are extremely poor, we started fast to research it, by stimulating an ample collective of specialists in this domain. After only a few going outs we established that the zone of the piscicultural lakes from Ariniş (Maramureş) is a territory with a remarkable variety and richness of the fauna, so that we continued and widened the research in the zone. The natural frame of the zone. The researched territory belongs to Baia Mare Depression (figure no 1) and it is a region without great surfaces of sitting waters. As a result, the humid zones are limited to the rivers Someş, Lăpuş and Sălaj, and also their meadows, most of them transformed into agricultural plots. The researched zone lies effectively in the SV of the region, representing an appendix between the Sălaj Hills, which limit the edge of Baia Mare Depression, prolonged up in the meadow of Sălaj, a river which has a rich flow. In the Sălaj Valley there have been made many artificial piscicultural ponds (fish ponds), which occupy by sum more then 100 ha, all situated on the territory of locality Ariniş. On the edge of these lakes it has been developed a belt of hydrofoil vegetation, sometimes wide, sometimes narrow (reed, bulrush, etc.). There is rich similar vegetation on the sewers between the lakes and alimentation sewers from Sălaj Valley. These lakes that last from more then three decades are exploited in the piscicultural system, and they are the biggest fishing from Maramureş County. The research mode. The authors made inspections in the territory in autumn 2000 and spring 2001 to identify the birds, in order to establish the avifauna potential, especially in the passage period, by quantitative assesses. These researches can be considered only preliminary investigations. With all these, the recorded data proved to be extremely promising. Research results. They are presented in Table no 1. There have been traced out till now 31 species of aquatic birds or other species typical for humid zones. From these, some as: Casmerodius albus, Anas clypeata, Aythya nyroca, are on the red roll, as endangered species, especially protected by the law, and others as: Mergus merganser, Bucephala clangula, etc., are rare species near the waters from the country. These places are excellent habitats for halt and food for the birds through autumn and spring passage. Our researches allowed, along with the tracing out of the rare species, also a remarkable concentration of ducks, birds common for humid zones, seagulls, etc. 269
