Length-weight Relationship and Condition Factor of Seven Fish Species from Apogonidae Family in Lembeh Strait, North Sulawesi Fione Yukita Yalindua(a*), Ana Faricha (a), Rikardo Huwae (a)
a) Research Center of Oceanography, Badan Riset dan Inovasi Nasional (BRIN), Jl. Pasir Putih Raya No.1, Jakarta Utara, Indonesia
*yukitayalindua[at]gmail.com
Abstract
The weight length relationship (LWRs) and condition factors can be an indicator of fish growth and environmental suitability. This study aims to calculate the length-weight relationships and condition factor of six Apogonidae species and compare them with Pterapogon kauderni as an introduced species in the same area and condition. The sample is collected monthly from January to December 2020 using a trap net in the Lembeh Strait area of North Sulawesi. A total of 699 specimens from sampling obtained seven species from Apogonidae family with the most specimen belonging to Pterapogon kauderni (33%) and the lowest is Pristicon trimaculatus (4.4%). The results indicated that almost all species exhibited a negative allometric growth pattern with the b value ranges 2.49-2.98 except for Apogon hartzfeldii resulted in positive allometric growth pattern (3.24). The relative condition factor ranges are 0.89-1.32 from all the seven species with only Apogon melas, Pterapogon kauderni and Apogon sealei values are below one and significantly different with the other group (p<0.05). This result can be caused by a variety of factors and need to be investigated further. This data is useful in establishing a management and monitoring system for Pterapogon kauderni in its introduced area.
