Harijono, Teguh and Ir. Yenny Risjani, DEA.,Ph.D and Dr. Ir. M. Luthfi Rayes, M.Sc. (2006) Hubungan Kualitas Tanah Dan Air Tambak Ekstensif Dengan Kelimpahan Nereis Sp Serta Pengaruhnya Terhadap Produksi Udang. Magister thesis, Universitas Brawijaya.
Abstract
Nereis sp. (Annelida-Polychaeta) selain banyak dijumpai di daerah pantai berlumpur, juga dapat hidup pada tanah dasar tambak udang air payau. Nereis sp. merupakan salah satu sumber makanan alami penting bagi udang yang dipelihara dengan sistem ekstensif. Nereis sp. Merupakan salah satu sumber makanan alami penting bagi udang yang dipelihara dengan sistem ekstensif. Nereis sp. tidak selalu dapat berkembang dengan baik pada setiap unit tambak, diduga hal ini karena dipengaruhi oleh kualitas tanah dasar (sedimen) dan air tambak, dimana ia hidup. Penelitian ini bertujuan untuk mempelajari hubungan antara kualitas tanah dasar dan air tambak dengan kelimpahan Nereis sp. pada ekosistem tambak udang ekstensif, serta untuk mengetahui pengaruhnya terhadap produksi udang. Penelitian dilakukan pada bulan Nopember 2005 sampai Maret 2006, di tiga kawasan tambak udang. Desa Tambakoso (TO), Desa Segoro Tambak (ST) dan Desa Pepe (PP), semuanya terletak di wilayah Timur Kabupaten Sidoarjo. Penelitian dilakukan dengan metode survei melibatkan tiga plot sampel tambak untuk setiap kawasan. Hasil penelitian menunjukkan bahwa, secara umum antar lokasi tambak memiliki kondisi kualitas tanah dasar dan air tambak cenderung berbeda. Akibat perbedaan tersebut berimplikasi pada perbedaan tingkat kepadatan populasi Nereis sp.. Kepadatan populasi Nereis sp. tertinggi dijumpai di lokasi TO, rata-rata 70,03 ± 13,1 ekor m'2 dan terendah di lokasi PP rata-rata 39,1 ± 7,0 ekor m'2 (p = 0,042). Parameter kualitas tanah dasar dan air tambak yang berpengaruh nyata terhadap kepadatan populasi Nereis sp. berdasarkan hasil analisa regresi berganda adalah C-organik, S042', logam dapat dipertukarkan, TOM, H2S dan BOD (R2 = 0,995; p = 0,015). Hasil analisa regresi berganda menunjukkan bahwa, Nereis sp. nyata berpengaruh terhadap produksi udang, bersama parameter lainnya seperti BOD, S042', redoks dan DO (R2 = 0,995; p = 0,001). Penelitian ini juga menghasilkan suatu gambaran bahwa, suatu kondisi kualitas tanah dasar dan air tambak yang dapat menyebabkan terganggunya kehidupan udang windu (Panaeus monodon), temyata masih dapat direspon positif oleh Nereis sp.. Dengan kata lain Nereis sp. masih dapat hidup secara normal. Kelimpahan Nereis sp. nyata dipengaruhi oleh kualitas tanah dasar dan air tambak, terutama C-organik, S042', TOM, H2S dan BOD, sedangkan produksi udang dipengaruhi oleh kepadatan populasi Nereis sp., S042', redoks, BOD dan DO. Sebagai sumber pakan alami di lahan tambak udang ekstensif, Nereis sp. belum dapat dimanfaatkan secara efektif oleh udang, bila kondisi kualitas tanah dasar dan air tambak kurang memenuhi syarat bagi udang. Untuk itu masih diperlukan penelitian lebih lanjut guna menemukan batas opyimal kualitas tanah dasar dan air tambak, yang memungkinkan kedua biota ini dapat hidup dan tumbuh bersama dengan baik di dalam satu lahan tambak.
English Abstract
Nereis sp. is kind of sea worm from class Annelida-Polychaeta, beside easely found of muddy beach area, it is able to grow and develop in the brackishwater of shrimp aquaculture sediment. Nereis sp. is an important food source for extensively cultured shrimp. Nereis sp is not always able to well develop on every pond unit, it is perhaps that one of them was affected by soil (sediment) and water quality of the pond it self. This research is aiming to study the relationship between pond bottom soil and water qualities with the abudance of Nereis, sp at the ecosystem of extensive shrimp pond aquaculture, and its effect on shrimp production. The research was done at November 2005 to March 2006 in three different ponds location, Tambakoso village (TO), Segoro Tambak village (ST) and Pepe village (PP), which all of them located in east section of Sidoarjo. The research is using survey technique with three plot of pond sample were picked. Result of the research shown that, the condition of pond bottom soil and water quality on every ponds seems to be different The difference implied to the difference level of population density of Nereis sp.. The highest population density of Nereis sp. shown in the TO, with the average of 70,03 ± 13,1 indnr and the lowest is in the PP location, with the average 39,1 ± 7,0 ind m‘2 (p= 0,042). Parameters of pond sediment and water quality which affecting the population density of Nereis sp. based of multilple regression analyze are C-organic, S042' metal-exch, TOM, H2S and BOD (R2 = 0,995;p = 0,015). Result of multiple regression analyze, population density of Nereis sp. it’s really effecting shrimp production with other parameter like BOD, S042', redox and DO (R2 = 0,995 ; p = 0,001). From this research were also known that the condition of pond bottom soil and water quality that bother the Tiger shrimps (Penaeus monodon) life, seems to be responded positively by Nereis sp.. In other words, Nereis sp. still could be lived normally. The abundance of Nereis sp. were significant affected by the quality of bottom soil and pond water, especially with C-organic, S042\ TOM, H2S and BOD, and the shrimp production were affected with the Nereis sp. population density, BOD, S042', Redox and DO. As a natural food source in an extensive aquaculture, Nereis sp. is not yet effectively used by shrimp, if the condition of sediment quality and water quality is not fulfil the requirement. It is still needed another research to found the optimum limit of pond bottom soil and water quality, which could lead both of these biota to lived and growth together in a pond area.
| Item Type: | Thesis (Magister) |
|---|---|
| Identification Number: | 040604 |
| Divisions: | S2/S3 > Magister Pengelolaan Tanah dan Air, Fakultas Pertanian |
| Depositing User: | Unnamed user with username nova |
| Date Deposited: | 10 Dec 2024 07:17 |
| Last Modified: | 10 Dec 2024 07:17 |
| URI: | http://repository.ub.ac.id/id/eprint/233536 |
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