POLA OSMOREGULASI DAN FAKTOR KONDISI UDANG VANAME (Litopenaeus vannamei) YANG DIKULTIVASI DI TAMBAK INTENSIF MOJO ULUJAMI PEMALANG Osmoregulation Patterns and Factors of Vaname Shrimp Conditions (Litopenaeus vannamei) Cultivated in Intensive Mojo Ulujami Pemalang
Authors: Maghfiroh Ana , Anggoro Sutrisno , Purnomo Pujiono Wahyu 
Published: September 2020

ABSTRAK Kelangsungan hidup organisme dipengaruhi oleh keseimbangan antara kandungan ion cairan tubuh dengan kandungan ion lingkungannya. Apabila gradient osmotik antara cairan tubuh dengan media lingkungan terlalu tinggi maka menyebabkan proses fisiologis terganggu, stress bahkan mengalami kematian (mortality) massal. Tujuan Penelitian ini yaitu mengetahui tingkat kelayakan kualitas air untuk budidaya udang vaname, menganalisis hubungan osmolaritas dan Tingkat Kerja Osmotik (TKO) pada udang vaname, dan mengetahui faktor kondisi udang vaname dalam kaitannya dengan TKO dan osmolaritas media. Penelitian ini dilaksanakan pada bulan November-Desember 2018. Metode penelitian yang digunakan adalah metode studi kasus dan metode deskriptif dengan metode pengukuran osmolaritas menggunakan alat Automatic Microosmotic Roebling. Sampel udang yang digunakan sebanyak 30 ekor udang vaname yang berasal dari 3 tambak yang ada di desa Mojo Ulujami Pemalang. Hasil penelitian ini menunjukkan osmolaritas media sangat berpengaruh terhadap tingkat kerja osmotik pada udang vaname di tambak intensif desa Mojo. Pertumbuhan udang vaname pada tambak intensif desa Mojo bersifat allometrik positif dengan pola osmoregulasi hipoosmotik dengan nilai b=3.0618 dan nilai faktor kondisi (Kn) = 1,621637. Hasil penelitian didapatkan nilai osmolaritas media pada tambak intensif udang vaname di Mojo pada salinitas 200/00 berkisar 616-618 (mOsm/l H2O) dan rata-rata TKO sebesar 37,36 (mOsm/l H2O). Tingkat kelayakan perairan pada tambak intensif udang vaname desa Mojo dikategorikan cukup mendukung tetapi perlu adanya perlakuan lebih lanjut. ABSTRACT The survival of an organism is affected by a balance between the content of ionic body fluids and the ion content of the environment. If the osmotic gradient between body fluids and environmental media is too high, the physiological process will be disrupted, stress will even experience mass mortality. The purpose of this study was to determine the level of feasibility of water quality for vaname shrimp farming, analyze the relationship of osmolarity and Osmotic Working Level (TKO) in vaname shrimp, and determine the factors of vaname shrimp conditions in relation to TKO and media osmolarity. This research was conducted in November-December 2018. The research method used was a case study method and descriptive method with a method of measuring osmolarity using an Automatic Microosmotic Roebling tool. Shrimp samples were used as many as 30 vaname shrimp from 3 ponds in Pemalang Mojo Ulujami village. The results of this study indicate that the osmolarity of the media greatly influences the level of osmotic work in vaname shrimp in Mojo intensive ponds. The growth of vaname shrimp in intensive ponds in Mojo village is allometric positive with a hypoosmotic osmoregulation pattern with a value of b = 3.0618 and a ponderal index (Kn) = 1 , 621637. The results showed that the media osmolarity values in the vaname shrimp intensive ponds in the Mojo at 200/00 salinity ranged from 616-618 (mOsm /l H2O) and the average TKO was 37.36 (mOsm / H2O). The level of feasibility of waters in intensive ponds of vaname shrimp in Mojo village is categorized as sufficiently supportive but needs further treatment.