A BIOMETRIC ANALYSIS AND FISHERMEN’S PERCEPTION ON Pseudorasbora parva (Temminck & Schlegel, 1846): A CASE STUDY FROM ROMANIA
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Abstract
A population of teleost fish stone moroko (Pseudorsabora parva) belonging to a Romanian freshwater pond located in Gorj County was analysed in order to reveal the length-weight relationship and condition factor, during two sampling seasons: October 2023 and February 2024. Positive allometric growth was estimated for 418 P. parva collected in 2023 (TW = 0.0065xTL3.305; TW = 0.003 x SL3.3946), while a negative allometric growth pattern was established for 764 P. parva collected in 2024 (TW = 0.0122xTL2.7309; TW = 0.0252 x SL2.5731). The values for condition factor K ranged between 0.47 and 0.74 (2023) and 0.31 and 1.47 (2024). For all individuals included in this study, the values for slope b were within the expected range of 2.5-3.5. In 2023, with b greater than 3, the growth type was estimated as positive allometric, while in 2024, the b lower than 3 indicated a hypoallometric growth type. On the other hand, in April 2024, a questionnaire was created in order to investigate the human knowledge about the traits of stone moroko in Romania. The surveyed fishermen appreciated both the initiative to address the impact of this invasive fish species and the integration of educational information in the questionnaire. Analysing the received answers, it was confirmed that people are aware about the necessary to apply methods in order to limit the reproduction of the stone moroko in Romania.
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