LENGTH-WEIGHT RELATIONSHIPS OF THE MONKEY GOBY (NEOGOBIUS FLUVIATILIS, PALLAS, 1814) FROM THE SOME. RIVER CATCHMENT

The monkey goby (Neogobius fluviatilis) is a species present in the ichthyofauna of Romania, which naturally inhabits the seaside area, the mouths of the Danube, the Danube, and the Danube tributaries lower sections. The species currently expands its range across the European continent, and it is now inhabiting new aquatic environments, including the Some. River catchment, in the Transylvania region of Romania. The purpose of this study is to analyse the biometric aspects regarding the Neogobius fluviatilis populations from the Some. River catchment. Specimens of Neogobius fluviatilis were collected from 9 locations situated on the main course of the Some. River and from a lake built on a small river from the Some. catchment, the.aga Lake. The collected specimens were preserved, and morphometric analysis was conducted in the laboratory with the following biometric aspects being analysed: length classes distribution and the length-weight relationships (LWR), such as the Fulton condition factor (K) and the allometric growth. In the present research work, we managed to obtain important information regarding the biometric aspects of the monkey goby (Neogobius fluviatilis) population from the Some. River catchment.