Growth pattern and the condition index of nomei fish Harpodon nehereus captured with mini-trawl in Tarakan Waters

Abstract

Nomei (Harpodon nehereus) is a which is found in the northern waters of Tarakan City which has a fairly high economic value. The purpose of the study to analyze the growth patterns and condition index of the fish in Tarakan waters. The research was conducted in two periods, namely the period January-February 2022 and June-July 2022. The research method used a quantitative descriptive method. Fish samples were collected from fisher and data observed were total length, total weight, and sex. In January, the sampled H. nehereus consisted of males (n = 69) and females (n = 231) with allometric negative growth and both fat (male = 50.7%) and thin (female = 48.1%) body type were found. In February 2022, the growth of males (n = 70) and females (n = 224) were positive allometric and both type of body shape were found, with sex ratio of male 48.6% and female 51.4%. In June 2022, the growth of males (n = 980) and females (n = 680) were negative allometric with body shape of both fat (male = 48.1%) and thin (female = 48.5%). In July 2022, the growth of male (n=1197) and female (n=822) were negative allometric with body shape fat (male=49.1%) and thin (female 47.8%). A better management of aquatic biological resources, especially the stock of nomei fish (H. nehereus), is crucial for a sustainable resource.