PREHRANA KLENA Leuciscus cephalus (Linnaeasus, 1758) IZ RIJEKE BABUNE

On the total number of 550 fish being caught in 1978 on three parts of the river Babuna there was investigated quantitative composition of the food seasonally and on the age classes. Chub from the river Babuna is omnivorous with the predominance of the floristic compound in his nutrition. The main mass of the food has autochtonous character. In the spring time the main mass of the food has autochtonous character. In the spring time, the main component are algues from Chrysophyceae plant group and Ephemeroptera by the animal part, along all the habitat of L. cephalus when Plecoptera are present in the upper and meddle part of the river. In the summer period, the dominant plant group is Conjugatophyceae different animal component from the river. Chrysophyceae are dominant also in the autumn period from the plant composition, group s by the animal composition vary from part to part, while Pisces can be found in the meddle part. In the winter time, dominant plant particle are Bacillariophyceae. Animal particles are also different from part to part. Pisces are present in the meddle part, too. Young fish are fed by Diatomeae and Chironomidae. Fish old er than 1+ principally take the food of plant origin and Conjugatae, also insects larves, partially detritus, and the oldest age classes are fed by Pisces.Godine 1978. na trima lokacijama u rijeci Babuni ulovljeno je 550 klenova. Kvantitativni sastav njihove hrane proučen je prema sezonama i dobnim razredima. Klen je u rijeci Babuni omnivoran, pri čemu prevladava floristička komponenta u njihovoj prehrani. Glavnina je njegove hrane autohtonog podrijetla. U cijelom području rijeke u proljeće u prehrani klena od biljaka prevladavaju alge Chrysophyceae, a od životinja Ephemeroptera. U gornjem i srednjem toku rijeke prisutni su Plecoptera. Ljeti od biljaka prevladavaju Conjugatophyceae, a životinje su različite u pojedinim dijelovima rijeke. Raznolikost životinja prevladava i u jesen, kada se u srednjem dijelu rijeke mogu naći u ribljoj ishrani. Tada su od biljaka prevladavale Chrysophyceae. Životinjska komponenta u hrani bila je slična i zimi, a od biljaka je uočena dominacija Bacillariophyceae. U prehrani mladih riba prevladavaju Diatomeae i Chironomidae, dok se prehrana ribe starije od 1+ sastoji ponajprije od Conjugatophyceae, zatim ličinki kukaca, djelomično detritusa, a u najstarijim razredima i od riba

PREHRANA KLENA Leuciscus cephalus (Linnaeasus, 1758) IZ RIJEKE BABUNE

On the total number of 550 fish being caught in 1978 on three parts of the river Babuna there was investigated quantitative composition of the food seasonally and on the age classes. Chub from the river Babuna is omnivorous with the predominance of the floristic compound in his nutrition. The main mass of the food has autochtonous character. In the spring time the main mass of the food has autochtonous character. In the spring time, the main component are algues from Chrysophyceae plant group and Ephemeroptera by the animal part, along all the habitat of L. cephalus when Plecoptera are present in the upper and meddle part of the river. In the summer period, the dominant plant group is Conjugatophyceae different animal component from the river. Chrysophyceae are dominant also in the autumn period from the plant composition, group s by the animal composition vary from part to part, while Pisces can be found in the meddle part. In the winter time, dominant plant particle are Bacillariophyceae. Animal particles are also different from part to part. Pisces are present in the meddle part, too. Young fish are fed by Diatomeae and Chironomidae. Fish old er than 1+ principally take the food of plant origin and Conjugatae, also insects larves, partially detritus, and the oldest age classes are fed by Pisces.Godine 1978. na trima lokacijama u rijeci Babuni ulovljeno je 550 klenova. Kvantitativni sastav njihove hrane proučen je prema sezonama i dobnim razredima. Klen je u rijeci Babuni omnivoran, pri čemu prevladava floristička komponenta u njihovoj prehrani. Glavnina je njegove hrane autohtonog podrijetla. U cijelom području rijeke u proljeće u prehrani klena od biljaka prevladavaju alge Chrysophyceae, a od životinja Ephemeroptera. U gornjem i srednjem toku rijeke prisutni su Plecoptera. Ljeti od biljaka prevladavaju Conjugatophyceae, a životinje su različite u pojedinim dijelovima rijeke. Raznolikost životinja prevladava i u jesen, kada se u srednjem dijelu rijeke mogu naći u ribljoj ishrani. Tada su od biljaka prevladavale Chrysophyceae. Životinjska komponenta u hrani bila je slična i zimi, a od biljaka je uočena dominacija Bacillariophyceae. U prehrani mladih riba prevladavaju Diatomeae i Chironomidae, dok se prehrana ribe starije od 1+ sastoji ponajprije od Conjugatophyceae, zatim ličinki kukaca, djelomično detritusa, a u najstarijim razredima i od riba