Climate variable relate biological respond of tropical fish: A review from small scale fisheries in Sunda Strait

Abstract

The issue of climate change is currently one of the crucial issues in fisheries management to ensure potential threats and their sustainability. Various approaches have been made, one of which is by looking at the influence of the population biology parameters such as the percentage of gonad maturity, the change from the length at first maturity (Lm50), and the first length of the first capture (Lc50)and growth rate (k). The research conducted from the Sunda Strait sea collected data from 2011, 2015, 2016, 2018, and 2019. The fish species whose biological data were analyzed were turmeric, kurisi and swanggi fish. The analysis performed was the size when 50 percent reached gonad maturity (Lm50), and the size of 50 percent of the fish caught (Lc50), the percentage of fish at the gonad maturity stage (TKG3-4). Annual trend analysis and linear regression determine the relationship between year temperature parameters and Lm, Lc, and the percentage of fish to be fully cooked gonads. The analysis results showed a fluctuation of Lm50, Lc50 in both male and female kurisi, kuniran and swanggi. However, there was no significant correlation between temperature and these parameters. These results indicate that the dynamics of Lm and Lm do not follow the trend of temperature changes. It is assumed that the effect of changes in Lm, Lc is more influenced by the intensity of the catch than the temperature in Sunda Strait.