Oktafia, Dhela2013-07-232013-07-232013-07-23sumarnihttp://repository.unri.ac.id:80/handle/123456789/4597Trichogaster pectoralis (Anabantidae) is a type of fish that commonly inhabit flood plane of rivers in Riau and it is known as ornamental fish. The biological aspects of this fish, however, is poorly known. To understand the reproductive biology of this fish, a research study has been conducted on Februari to April 2013. Fish samples were captured from flood plane area of the Tangkerang Barat District and Delima District. Parameters measured were sex ratio, GSI, maturity level, fecundity, and egg diameter. There were 87 fishes (32 male and 55 female). The ratio of male and female was 1:2. The GSI of the fish was 0,07-9,58%, egg diameter was relative small (0,48-0,51 mm). The fecundity of fish from the flood plane was3341-22692eggs/ fish. During the sampling period, the maturity level of the fish captured was various, indicate that the T. pectoralis spawning period is relatively long and it peaks in Februari. It is predicted that the T. pectoralis is a parsial spawner.otherTrichogaster pectoralisAnabantidaeGSImaturity levelfecundity.student Paper Post Degree