Local people name Selaroides leptolepis distributed in Tomini Bay as Oci Fish. A study of the fish reproductive biology, which is one aspect of fisheries biology, is crucial to support the implementation of sustainable Oci Fish resource management policies. This study aims to determine the average length at first maturity, gonad maturity stages, and fecundity of the fish in Tomini Bay. Sampling was carried out using a stratified random sampling method from the catches of the fishermen landed in Fish Landing Base Kampung Tenda, Gorontalo City. The time interval sampling was conducted per month during April, May, and June 2020. Fish and egg samples preserved using ice cubes and a 10% formaldehyde solution correspondingly. The results of the study showed that the Oci Fish in Tomini Bay had a length range of the first maturity between 166 and 174 mm with a gonad maturity index ranging from 1.773 to 2.760%. The average fish fecundity was 16623 ± 4850 eggs.
The study aims to figure out growth pattern and condition factor of the flying fish (Decapterus russelli) landed at the Fish Landing Base Tenda, Hulonthalangi District, Gorontalo City. Sampling of 360 layang fish was carried out randomly based on a simple random sampling method for three months. Determination of fish sex was conducted visually by dissecting samples and observing the gonads. The study showed that the layang fish (D. russelli) landed in PPI Tenda had a positive allometric growth pattern with condition factor values ranging from 1.005 to 1.014 and 1.002 to 1.620 for male and female, respectively
The objective of this research was to determine the species composition and abundance of fishes in the waters of Tontayuo Village and Lamu Village, Batudaa Pantai Subdistrict, Gorontalo Regency. This research was conducted from April to May 2022. The data collection of this research was carried out using a net with a length of 50 m, a widh of 2 m, and a mesh size of 1.5 cm drawn in the seagrass meadow, and it was replicated three times at each station, namely station I (Tontayuo Village) and station 2 (Lamu Village). The findings denoted that the highest species composition was found at station I with 34 species, while at station 2, there ware only 11 species. At the same time, the highest abundance value found at station 1 was Piotosus lineatus species, and the highest abudance at station II was Caranx melampyus species. Overall, the finding signified that the composition and abundance of fishes at station I and station II ware highly different due to the different water condition and fishing times.
This study aimed to identify the inventory of gastropod species and Density at The Mangrove Ecosystem in Pentadu Timur Village, Tomini Bay, Gorontalo, from March to April 2022. Two observation stations were determined from purposive sampling, which was carried out in five transect lines and four quadrants measuring 1x1, while the gastropod samples were taken and then placed in a plastic bag for identification and documentation. In contrast, the density analysis was carried out descriptively by differentiating each species of Gastropod. The results showed that eight families and 11 species of gastropods were identified, namely; Monodonta labio, Cassidula aurisfelis, Littoraria sulcata, Nerita planospira, Chicoreus capucinus, Cerithium kobelti, Nassarius polygonatus, Cerithidea obtusa, Telescopium telescopium, and Tereblaria palustris. In both stations within the tourist area, two types of gastropod species experienced the highest and lowest densities for two months, namely Nassarius polygonatus, found at 20.4 ind/m² in march and 18.4 ind/m² in April, whereas the protected forest areas that species Telescopium found 14.2 ind/m² in march and 12.40 ind/m² in April
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