Kusuma, Ni Putu Dian and Prof. Dr. Ir. Endang Yuli H,, MS and Dr. Eng. Abu Bakar Sambah,, S. Pi., MT (2018) Potensi Sumberdaya Ikan Sidat Berdasarkan Kondisi Habitat Sungai dan Komunitasnya di Sungai Dumoga, Sulawesi Utara. Magister thesis, Universitas Brawijaya.
Abstract
Pemanfaatan Sungai Dumoga yang bermuara di Pantai Inobonto diduga telah mengalami perubahan ekosistem sungai akibat pengaruh aktivitas manusia seperti kegiatan rumah tangga, pertanian dan industri. Perubahan ekosistem diduga mempengaruhi kondisi sungai, kualitas air serta biologi ikan sidat di Sungai Dumoga. Penelitian ini bertujuan untuk mengetahui dan menganalisis kondisi sungai, karakteristik spesies serta pemetaan potensi ikan sidat. Berdasarkan hasil penelitian, kondisi sungai Dumoga dan kualitas air berada dalam kondisi optimal untuk penyebaran dan pertumbuhan ikan sidat, baik glass eel maupun yellow eel. Jenis glass eel di muara Sungai Dumoga sebanyak 2.251 ekor, terdiri dari Anguilla marmorata sebanyak 49,13%, Anguilla bicolor pacifica sebanyak 37,94% dan Anguilla spp sebanyak 12,93%. Pada pengukuran morfologi, nilai anodorsal terbagi dalam 3 kelompok yaitu 14,90% - 16,14% (A. marmorata); 0%-2,87% (A. bicolor pacifica) dan 6,85% - 7,21% (Anguilla sp.). Pigmentasi ekor A. marmorata mencapai ujung dengan bentuk ekor agak bundar, pigmen pada A. bic. pacifica berbentuk seperti sapu/sikat dan pada Anguilla spp., bentuk tulang ekor lebih mirip dengan A. marmorata dengan pigmen berbentuk sapu seperti pada A. bic. pacifica, namun lebih terlihat pucat dan kurang padat. Pola pertumbuhan ikan sidat secara keseluruhan bersifat allometrik negatif, yakni pertambahan berat tubuh lebih lambat dibandingkan dengan pertambahan panjang tubuh. Ikan sidat di Sungai Dumoga tergolong tidak gemuk karena faktor kondisinya berkisar antara 0,0024 - 0,0036. Panjang sidat dewasa rata-rata yang disampling 58.92cm pada Anguilla marmorata (IKG 1,57–2,90%); 54,2cm pada A. bic. pacifica (IKG 1,27–2,79%) dan 52,32cm pada Anguilla spp (IKG 0,97- 2,50%). Perbandingan nilai Lc dengan Lm untuk A. marmorata, yakni Lc = 65cm dan Lm= 74,74cm; pada A. bic. pacifica Lc = 57,51cm dan Lm= 68,26cm dan pada Anguilla spp. didapatkan nilai Lc = 52,50cm dan Lm= 64,02cm. Pemetaan lokasi keberadaan ikan sidat di Sungai Dumoga berdasarkan kondisi kualitas air, kelimpahan glass eel dan indeks kematangan gonad sidat dewasa
English Abstract
Utilization of the Dumoga River which empties into Inobonto Beach is thought to have undergone changes in river ecosystems due to the influence of human activities such as household, agricultural and industrial activities. Ecosystem changes are thought to affect river conditions, water quality and the biology of eel on the Dumoga River. This study aims to determine and analyze river conditions, species characteristics and mapping potential eels. Based on the results of the study, the condition of the Dumoga river and water quality are in optimal conditions for the distribution and growth of eel, both glass eel, and yellow eel. 2,251 glass eels in the mouth of the Dumoga River, 49.13% of Anguilla marmorata, 37.94% of Anguilla bicolor pacific and 12.93% of Anguilla spp. In morphological measurements, ano-dorsal values were divided into three groups, namely 14.90% - 16.14% (A. marmorata); 0% -2.87% (A. bicolor pacifica) and 6.85% - 7.21% (Anguilla sp.). Tail pigmentation A. marmorata reaches the tip with a slightly rounded tail, pigment in A. bic. pacifica is shaped like a broom/ brush and in Anguilla spp., the shape of the tail bone is more similar to A. marmorata with broom-shaped pigments as in A. bic. pacifica, but paler and less dense. The overall growth pattern of eel is a negative allometric, which is a slower weight gain compared to the increase in body length. Eel on Dumoga River is classified as not fat because the condition factor ranges from 0.0024 to 0.0036. The average length of adult eels sampled was 58.92cm in A. marmorata (IKG 1.57–2.90%); 54.2cm on A. bic. pacifica (IKG 1.27–2.79%) and 52.32cm on Anguilla spp (IKG 0.97-2.50%). Comparison of Lc values with Lm for A. marmorata, namely Lc = 65cm and Lm = 74.74cm; on A. bic. pacifica Lc = 57,51cm and Lm = 68,26cm and on Anguilla spp. obtained Lc = 52.50cm and Lm = 64.02cm. Mapping the location of eel on Dumoga River based on water quality conditions, glass eel abundance and maturity index of adult eel gonads.
| Item Type: | Thesis (Magister) |
|---|---|
| Identification Number: | TES/639.313/KUS/p/2018/041810206 |
| Subjects: | 600 Technology (Applied sciences) > 639 Hunting, fishing & conservation |
| Divisions: | S2/S3 > Magister Budidaya Perairan, Fakultas Perikanan dan Ilmu Kelautan |
| Depositing User: | Sugeng Moelyono |
| Date Deposited: | 29 Aug 2022 02:27 |
| Last Modified: | 29 Aug 2022 02:27 |
| URI: | http://repository.ub.ac.id/id/eprint/193674 |
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