Studi Pola Lingkaran Pertumbuhan Otolith pada Ikan Katung (Pristolepis grooti) yang Ditangkap di Hilir Sungai Siak Provinsi Riau
Abstract: In the Siak River,
Riau, the water quality in the downstream area is relatively bad due to
pollutant originated from several sources such as industrial and domestic
wastes. The low quality water may negatively affects the growth of fish and it
is reflected in the growth pattern in the otolith of fish living in that river.
To understand the growth pattern in the otolith of Pristolepis grooti
(Anabantidae)living in that river, a study has been conducted. Totally 25
fishes were captured from the downstream of the Siak River. The otolith were
then removed and processed following Windarti (2007) and investigated under a
binocular microscope to study the growth ring pattern in the otolith. The
number of dark growth ring was counted. Results shown that 2 to 5 dark growth
rings, around 0.086 mm thick were present in the otolith of the fish. The
presence of the dark growth rings in the otolith indicated that the growth of
P. grooti in the downstream of the Siak River was hampered and this fact also
suggested that the water quality in the downstream of the Siak River is not
sufficient to support the life P. grooti in that area.
Keywords: Otolith, Pristolepis
grooti, downstream of the Siak River, growth pattern
Penulis: Ennie Chahyadi,
Windarti
Kode Jurnal: jpperikanandd160541