Morphometric and meristic characteristic study of pora pora fish (Mystacoleuseus padangensis) caught in the Lower Bah Bolon River, Simalungun Regency

Yunita Sri Malem Barus (Universitas Samudra)
Suri Purnama Febri (Universitas Samudra)
Andika Putriningtias (Universitas Samudra)
Edwarsyah Edwarsyah (Program Studi Magister Ilmu Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Teuku Umar, Aceh Barat)

Acta Aquatica: Aquatic Sciences Journal
Acta Aquatica, Vol. 13: No. 2 (August, 2026)

This study aims to examine the morphometric and meristic characteristics of pora-pora fish (Mystacoleucus padangensis) found downstream of the Bah Bolon River, Simalungun. Sampling was carried out from April to June 2024 with a total of 58 fish. Measurement results showed that the length of the pora-pora fish ranged from 12 - 17 cm, with a weight range of 25 - 69 g. From the morphometric and meristic measurements, it can be concluded that the growth pattern of pora-pora fish is positively allometric (b>3) with a regression coefficient (b) of 3.4945 and a coefficient of determination (R²) of 0.9246, which means that the increase in fish weight is faster than the increase in body length. The condition factor of pora-pora fish in the Bah Bolon River was found to range from 0.7 - 1.23, categorized as lean and underweight fish. Keywords: Bah Bolon River; Morphometric; Meristic; Pora-pora fish