Hubungan Pasang Surut terhadap Larva Nekton di Danau Anak Laut Kabupaten Aceh Singkil

Abstract

The research was conduct in Anak Laut Lake, West Gosong Telaga Village, North Singkil Subdistrict, Aceh Singkil District, Aceh Province the title is The Correlation of Tidal to Nekton larvae. It was conducted in March April 2023. Anak Laut Lake is a coastal lake commonly referred to a coastal lagoon. Water conditions in coastal lakes are influenced by tides due to sea water entering the lake. The environmental conditions of Anak Laut Lake which are influenced by tides greatly affect the biodiversity, one of the biodiversity is nekton larvae. The occurrence of changes in water level caused by tides make differences in the presence and distribution of nekton larvae. The results of this research showed the total of nekton spatially and temporally at high and low tide were 10 families and 10 genera consisting of 21,294 individuals of larval nekton. The highest spatial abundance value was obtained at high tide at station III with a value of 297 and the lowest at high tide at station II with a value of 184. While the highest temporal abundance value was obtained at low tide in the Full Moon phase with a value of 581 and the lowest at low tide in the New Moon phase with a value of 53. With the value of the diversity index (H') obtained spatially and temporally at high tide and low tide is 1.09 1.76 included in the medium category. The correlation of tides to the abundance and diversity of larval nekton is not related during high and low tides. This is because during high and low tides, sea tide always to assist in transporting nekton larvae. Unstable weather while sampling also affected the abundance of larvae, which was not correlated between high and low tides. Correlation of water quality parameters to abundance and diversity of nekton larvae using PCA (Principal Component Analysis).