University of Pula. Department of Natural and Health Studies.
Abstract
Plemenita periska sesilni je organizam, filtrator koji u osnovi nastanjuje gole pomične podloge, te pomične podloge obrasle morskim cvjetnicama. U posljednjih je nekoliko desetljeća uočena drastično smanjenje populacija diljem Sredozemnog mora. Pretpostavlja se da je tome glavni uzrok upravo ljudska aktivnost. U posljednjih nekoliko godina uočeno je povećanje brojnosti plemenite periske u priobalju Rovinja, čime se stvorila potreba za kvantitativnu analizu stanja populacija. Na tri lokacije u priobalju Rovinja odreĎeni su gustoća populacije, veličinski razredi, te starosne skupine. U svrhu odreĎivanja veličinskih razreda i starosne skupine, na svakoj od tri lokacije izmjereno je po 30 jedinki čime je sveukupno istraživanjem obuhvaćeno 90 jedinki. Rezultati istraživanja ukazuju kako su istraživane populacije iznimno zdrave. U budućim istraživanjima bilo bi potrebno obuhvatiti i druge lokacije u priobalju Rovinja u svrhu usporedbe rezultata sa različitih lokacija.The fan mussel Pinna nobilis is a sessile organism, a filter feeder inhabiting bare soft-bottom areas and areas overgrown by seagrass meadows. In the past few decades a drastic population decrease was noted all along the Mediterranean sea shores. The assumptions are that the cause for this population reduction is stress, which in general comes from human activities. In the past few years population growth was noted in the coastal area of Rovinj. The need for quantitative analysis was created. On three locations in the Rovinj coastal area, population density, size classes and age classes were determined. On each location 30 specimens were measured for the size and age classes determination, which makes 90 specimens all together. The results of the research show that the populations in the Rovinj coastal area are healthy. Further quantitative investigations on other locations in the Rovinj coastal area are needed for the comparison of results from different areas
