Abdul H. Olii, Nuralim Pasisingi
Nike is a Gorontalo local name for the marine life stages of amphidromous goby fish. The study compared Nike's daily growth trend and morphometric body ratio in diel times. Sampling was conducted at 7 points for 7 consecutive days during the waning crescent of Hijri Year (22 Sha’ban to 28 Sha’ban 1439), which coincides with the Gregorian Calendar of 8 to 14 May 2018. The fish were collected twice per day, representing period of the day (07.00-08.00 am) and the night (7.00-8.00 pm). 2100 larvae were gathered from Gorontalo waters using circular net fishing gear, then placed in ziplock bags and preserved with ice cubes. The total length (TL), standard length (SL), head length (HL), body depth (BD), body width (BW), and body weight (W) as morphometric aspects of samples were measured. Statistical analysis using t-test assuming equal variance was applied to test significant differences among the ratio of morphometric character values of Nike fish caught from diel time. The results revealed that an alteration in Nike's total length and average body weight did not show a consistent tendency in sync with the increase in the number of appearance days. Hence, there was an indication that the fish population consisted of more than one cohort and confirmed previous findings that the shoal was composed of multi-species. In addition, variation values of morphometric body fish ratio combination: TL/SL, BD/SL, BW/SL, HL/SL, W/SL, SL/TL, BD/TL. BW/TL, HL/TL, and W/TL can potentially be developed and utilized to track species composition and to assess Nike's population dynamics. © 2022, BIOFLUX SRL. All rights reserved.
Aquatic Resources Management Study Programme, Faculty of Fisheries and Marine Science, Universitas Negeri Gorontalo, Gorontalo, Gorontalo City, Indonesia
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