Penelitian studi kebiasaan makanan Ikan Baronang Lingkis Siganus canaliculatus di Kepulauan Tanakeke Takalar Sulawesi Selatan telah dilakukan pada bulan Februari 2018. Penelitian ini bertujuan untuk mengetahui kebiasaan makanan ikan Baronang Lingkis berdasarkan habitat aslinya yaitu di Takalar Sulawesi Selatan. Jumlah sampel yang digunakan sebanyak 10 ekor. Sampel dibedah pada bagian belakang operculum dan menuju bagian dasar perut lalu sistem pencernaanya dipisahkan kemudian diawetkan dengan menggunakan formalin 1%. Kemudian alat pencernaan dibedah lalu dikerik dan dikeluarkan semua isinya. Selanjutnya isi pencernaan diidentifikasi hingga tingkat spesies menggunakan referensi indentifikasi yang relevan. Hasil penelitian menunjukkan bahwa jenis-jenis makanan yang ditemukan adalah alga, lamun, crustacea dan detritus atau sisa makanan yang sulit teridentifikasi dan pasir. Hasil perhitungan nilai Indek preponderance (IP), diperoleh nilai tertinggi pada alga yaitu 58,3%, lamun 20,5%, detritus 20,5% dan crustacea 0,06%. Penelitian ini menyimpulkan bahwa ikan baronang lingkis di kepulauan Tanakeke mempunyai kebiasaan memakan alga yang utama, lamun dan destritus sebagai tambahan dan crustacea makanan pelengkap.Kata kunci : Tanakeke, Ikan Baronang, Kebiasaan Makanan
Seaweeds of the genus Gracilaria are an important aquaculture commodity, commonly cultured in brackish water ponds as well as in coastal waters. In South Sulawesi, Indonesia, the Gracilaria acultured in ponds has been named G. verrucosa, while Gracilaria cultured in coastal waters has been named G. gigas. Morphologically, these two types of Gracilaria do look different. Detailed examination shows that they appear to have similarities. This study aimed to examine whether these two types of Gracilaria are different species or not. The study used morphological characters and COI mitochondrial gene barcoding to assess the Gracilaria types cultured in ponds and coastal waters. Samples were collected from Ujung Baji Village in Takalar Regency, the main seaweed producing region in South Sulawesi Province, Indonesia. The results indicate that both Gracilaria types have similar genetic characteristics as well as shared morphological characters. Based on these analyses, it is considered that both Gracilaria types cultivated may be strains of the same species.
Terebralia palustris is a snail that lives in the mangrove ecosystem. This snail is found around the mangrove roots. Snail fecundity is also influenced by several factors. This study aims to determine the association of fecundity with morphometrics and environmental factors. sampling is done randomly. The research station is 2. Each station has one plot measuring 10 m x 10 m and in it, there is a small plot measuring 0.5 m x 0.5 m in 4 pieces. Data were analyzed by regression using SPSS version 21 software. The average fecundity of snails in September was 85887.64 granules, October was 45962.67 granules, and November was 35668.62 granules. The average temperature of seawater is 35.20 ± 0.16 ˚C, the average salinity of seawater is 32.27 ± 0.63 ‰, and the average pH of seawater is 6.39 ± 0.09. The results of the regression analysis showed signs that the snail morphometry of T. palustris did not affect snail fecundity because the significance value was far above 0.05. The results of the regression analysis showed that acidity factors significantly affected fecundity with a significance value of 0.047 and the other factors is not affect.
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