Morphometry And Reproduction Biology Analysis Of Bullet Tuna (Auxis rochei) Landed In Kedonganan Fish Landing Base, Bali
| Main Authors: | Suryati, Yohana Deni, Setyawati, Iriani, Yusup, Deny Suhernawan |
|---|---|
| Format: | Article info application/pdf eJournal |
| Bahasa: | ind |
| Terbitan: |
Prodi Magister Ilmu Biologi, Fakultas MIPA, Universitas Udayana
, 2023
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| Online Access: |
https://ojs.unud.ac.id/index.php/metamorfosa/article/view/78503 https://ojs.unud.ac.id/index.php/metamorfosa/article/view/78503/49041 |
Daftar Isi:
- Objective of this research is to study morphometry and reproduction biology of bullet tuna (Auxis rochei, Risso 1810), landed in PPI (Pangkalan Pendaratan Ikan – Fish Landing Base) Kedonganan, Bali. Morphometric aspect covers distribution of length measurement and correlation of length-weight, while gonad maturity is observed hystologically based on gonad cell growth. Result of this study shows that the length of bullet tuna ranges from 16.5 to 35.3 cmFL, with weight extends from 64.8 to 539.4 gram. Growth pattern of bullet tuna is positively allometric (b>3). Generally, landed bullet tuna in PPI Kedonganan are dominated by mature fish with Gonad Maturity Level III, IV, and V by as many as 123 individuals (58.85%) within 22 – 23 cmFL length. The difference of gonad maturity result that bullet tuna spawning season is asynchronous (multiple spawning) and partial spawning Keywords : bullet tuna, length – weight correlation, reproduction aspect, gonad
- Penelitian bertujuan untuk mengkaji aspek morfometri dan biologi reproduksi ikan tongkol lisong (Auxis rochei, Risso 1810) yang didaratkan di Pangkalan Pendaratan Ikan (PPI) Kedonganan. Aspek morfometri meliputi sebaran panjang dan hubungan panjang berat ikan, sedangkan kematangan gonad diamati secara histologis berdasarkan perkembangan sel gonad. Hasil penelitian menunjukkan ikan tongkol lisong memiliki sebaran panjang antara 16,5 - 35,3 cmFL dan berat tubuh antara 64,8 - 539,4 gram dengan pola pertumbuhan ikan tongkol lisong bersifat allometrik positif (b>3). Secara umum ikan tongkol lisong yang didaratkan di PPI Kedonganan didominasi ikan yang memiliki TKG sudah matang gonad (TKG III, IV dan V) sebanyak 123 ekor (58,85 %) pada kisaran panjang antara 22 - 23 cmFL. Perkembangan gonad yang tidak bersamaan mengindikasikan bahwa reproduksi ikan tongkol lisong bersifat asynchrounous (pemijahan berganda / multiple spawning) dengan periode mijah tidak sekaligus (partial spawning). Kata kunci : tongkol lisong, hubungan panjang - berat, aspek reproduksi, gonad