Makanan dan Kebiasaan Makan Ikan Sembilang (Plotosus canius) di Perairan Kota Tanjungpinang, Kepulauan Riau

Abstract

Penelitian ini bertujuan untuk mengetahui jenis makanan, dan rasio panjang usus ikan sembilang pada perairan Kota Tanjungpinang yang meliputi index of preponderance dan indeks kepenuhan lambung. Lokasi sampling ditentukan berdasarkan metode purposive sampling dengan menetapkan 3 stasiun pengamatan dan 3 kali pengulangan yang dilaksanakan pada November 2018 sampai Maret 2019. Analisis data yang dilakukan yaitu rasio panjang usus dengan panjang total, indeks bagian terbesar, dan indeks kepenuhan lambung. Hasil penelitian menunjukkan bahwa nilai rasio panjang usus dan panjang total masing-masing pada sembilang jantan dan betina di ketiga stasiun sebesar 1,24;1,26:1,30. Index of preponderance berkisar 34,4 – 50,2% pakan utama pada umumnya terdiri dari kelompok, kepiting, kerang, udang dan siput sehingga dapat disimpulkan ikan sembilang bersifat karnivora. Makanan pelengkap ikan sembilang dijumpai seperti detritus dan juga dari spesies Fitoplankton (Mikroalgae) yaitu Acinastrum sp. Chlorella sp. Pediastrum sp. Characium sp. Anabaena sp. Thalasionema sp. Oscillatoria sp. Ceratium sp. Peridinium sp. Navicula sp. Gyrosigma sp.

Biological Aspects and Feeding Ecology of Sembilang Plotosus canius in Langsa Estuary

“…This study also showed that shrimp is the most common organism in P. canius in the Langsa estuary. This result was similar to a previous study conducted by Safitri et al (2021) which stated that the most common organisms in P. canius are shrimp and crab, with a range of 34.4 -50.2%. Muharram (2016) also showed that crustaceans are the most common organisms in P. canius, with 58-65% value range.…”

Evaluation on the growth pattern and biological conditions of Sembilang (Plotosus canius) in East Aceh

“…Furthermore, the average body width was 3.51 cm, with a mouth opening width of 4.34 cm. These research results are consistent with the previous data, which showed that sembilang in the Tanjung Pinang estuary waters had a total length range of 29 -39 cm [11].…”

“…Based on these groupings, the main food of fish was shrimp, with a value of 45%, followed by complementary, namely pieces of fish, worm, leaves, and crabs, with a value of 17%, 16%, 13%, and 9%, respectively. According to [11], crustaceans are the most common, and both shrimp and crabs belong to this group. Therefore, the main food of P. canius was crustaceans, with a value range of 34.4 -50.2%.…”