Dwiaji, Dimas Rizqi (2018) Penentuan Habitat Ikan Demersal Berdasarkan Rentang Kedalaman dan Jenis Sedimen Menggunakan Data Multibeam Echosounder. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Potensi perikanan di Indonesia terdiri dari beberapa jenis, umumnya berupa ikan karang, pelagis besar dan kecil, lobster, udang, dan demersal. Salah satu cara mengoptimalisasi potensi jenis-jenis potensi perikanan tersebut adalah dengan mencari habitat ikan. Habitat ikan ini selanjutnya dapat digunakan sebagai daerah penangkapan ikan. Pada penelitian kali ini, habitat ikan demersal dicari berdasarkan preferensi ikan demersal. Adapaun jenis-jenis ikan demersal yang dicari habitatnya adalah ikan Petek, Beloso, Peperek, Kakap Merah, Kurisi, Kakap Putih, Lencam, dan Kuwe. Berdasarkan preferensi ikan demersal yang hidup di dasar laut dengan jenis sedimen tertentu, pendekatan secara akustik digunakan untuk menentukan kedalaman dan jenis sedimen yang menjadi preferensi beberapa jenis ikan demersal. Instrumen akustik yang digunakan pada penelitian kali ini adalah instrument Multibeam Echosounder (MBES). Data yang digunakan dari MBES adalah data batimetri dan hambur balik (backscatter strength). Data batimetri digunakan untuk mendapat nilai kedalaman dari lokasi penelitian, sedangkan data hambur balik diolah sehingga menghasilkan mosaik hambur balik dan angular response curve. Angular response curve selanjutnya digunakan untuk klasifikasi jenis sedimen pada mosaik hambur balik, sehingga didapat jenis sedimen di area penelitian berupa lanau, lanau berpasir, pasir berlanau, dan pasir. Dilakukan pengirisan (intersection) dari data kedalaman dan persebaran sedimen berdasarkan preferensi kedalaman dan jenis sedimen ikan-ikan demersal. Area hasil irisan menunjukkan bahwa ikan Lutjanus campechanus (Kakap merah) memiliki habitat paling luas, yaitu 905.221,356 m2, sedangkan Lates calcarifer (Kakap putih) sebaliknya, yaitu 105.317,213 m2.
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Indonesia’s fisheries potential consists of reefs, pelagic, lobster, shrimp, and demersal fishes. To optimize this potential, the habitat of these fish can be mapped. The result of demersal fish habitat mapping can be used as fishing ground. This research aims to map demersal fish habitat based on its preferences. In this research, Splendid ponyfish, Brushtooth lizardfish, Ponyfish, Red snapper, Japanese threadfin bream, Barramundi, Sprangled emperor fishes, and Giant travelly are demersal fish that are sought after. Since demersal fish live near seafloor with certain sediment types, acoustic approach is used to map seafloor depth and sediment types that match demersal fishes’s preferences. Acoustic instrument used in this research is Multibeam Echosounder (MBES). There are 2 MBES data used in this research, bathymetry and backscatter strength. Bathymetric data is used to analyze seafloor depth, while backscatter strength data is used to create backscatter strength mosaic and Angular Response Curve. Angular response curve is used to classify sediment types on backscatter mosaic, creating sediment distribution map. Based on sediment classification result, it is known that research site has 4 types of sediment, such as silt, sandy silt, silty sand, and sand. Then, fish habitat is mapped by intersecting seafloor depth and sediment types according to demersal fishes’s preferences. The intersecting result shows that Lutjanus campechanus (Red snapper) has the largest habitat (905,221.356 m2), while Lates calcarifer (Barramundi/sea bass) shows the opposite (105,317.213 m2).
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Habitat, ikan demersal, hambur balik, batimetri |
| Subjects: | G Geography. Anthropology. Recreation > G Geography (General) G Geography. Anthropology. Recreation > GC Oceanography |
| Divisions: | Faculty of Civil Engineering and Planning > Geomatics Engineering > 29202-(S1) Undergraduate Thesis |
| Depositing User: | Dimas Rizqi Dwiaji |
| Date Deposited: | 28 Jun 2021 00:53 |
| Last Modified: | 28 Jun 2021 00:54 |
| URI: | http://repository.its.ac.id/id/eprint/56055 |
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