Kelimpahan dan Pertumbuhan Ikan (Johnius trachycephalus) Diperairan Tanjung Beringin Serdang Bedagai Sumatera Utara

Abstract

BELLA ATIKA LBS Abundance and Growth of Gulamah Fish (Johnius trachycephalus) in the Waters of Tanjung Beringin Serdang Bedagai North Sumatra (under the guidance of DESRITA as Chair of the Advisory Commission). Research on the Abundance and Growth of Gulamah Fish (Johnius trachycephalus) in the Waters of Tanjung Beringin Serdang Bedagai, North Sumatra aims to determine the Abundance, Growth Patterns, and Condition Factors of Gulamah Fish (Johnius trachycephalus) in the Waters of Tanjung Beringin Serdang Bedagai, North Sumatra. Sampling of gulamah fish (Johnius trachycephalus) was carried out from October to December 2024 in the Waters of Tanjung Beringin Serdang Bedagai, North Sumatra using a dragon trap measuring 6-8 meters, ½ inch mesh, length and width of the side 15x30 cm, and a diameter of the mouth of the net opening 15 cm. Sampling of gulamah fish was carried out every 30 days starting at 08.00 WIB – 16.00 WIB. At each sampling, the trap fishing gear was lowered 3 times. The number of individuals of the gulamah fish obtained at each station was counted, the catch was separated at each station, the length and weight of the fish were measured, then an analysis was carried out which included abundance, growth patterns, and condition factors (FK). Measurement of physical and chemical parameters of the waters including temperature, depth, brightness, salinity, dissolved oxygen, and pH was carried out directly in the field at each station with 3 repetitions. The results of the study obtained a sample size of 382 gulamah fish (Johnius trachycephalus). With 247 females and 135 males. The highest abundance of gulamah fish was at station III and the lowest at station I, but the abundance of the three stations was still high. The growth pattern of gulamah fish at stations I, II, and III in the Tanjung Beringin Serdang Bedagai Waters was negative allometric. The condition factor of gulamah fish at stations I, II, and III was said to be less flat.