Uočena prisutnost češljača (Pectinidae) te razvoj akvakulturne djelatnosti u ušču rijeke Krke potaknuli su istraživanja gonadnog indeksa, sezonskih promjena težine tkiva jakovske kapice (Pecten jacobaeus L.) i distribucije ličinki češljača u planktonu ušća, kako bi se upoznao njihov reproduktivni ciklus te utvrdila mogućnost sakupljanja mlađi za potrebe kontroliranog uzgoja.
Na osnovi rezultata istraživanja reproduktivnog ciklusa utvrdeno je da se jakovska kapica mrijesti u proljetnom razdoblju. Najintezivnija pojava ličinaka češljača u planktonu zabilježena je pri temperaturi oko 18 do 20 °C i salinitetu iznad 30 x 10 -3.
Najpogodnije vrijeme za sakupljanje mlađa jakovske kapice u ušću rijeke Krke za potrebe kontroliranog uzgoja jest razdoblje od ožujka do srpnja, a optimalna dubina za postavljanje kolektora (na lokalitetima dubine 20 i više metara) dubina je između 10 i 15 metara.The presence of Pectinidae and the development of aquaculture at the mouth of the river Krka inspired investigations on the gonad index, seasonal changes of tissue weight of the scallop (Pecten jacobaeus L.) as well as the distribution of its larvae in plankton of the river mouth. The aim of this study was to learn about their reproductive cycle and determine the possibility of collecting young for controlled culture.
Based on results of investigations of the reproductive cycle it was determined that the scallops spawn in the spring. The highest occurrence of scallop larvae in plankton was recorded in temperatures of about 18 to 20°C and a salinity of above 30 x 10-3.
The optimal time for collecting juvenile scallops, at the mouth of the river Krka, for use in controlled culture, is the period from March to July, and the optimal depth for placing the collectors (on localities of 20 and more meters) is between 10 and 15 meters
