Panen parsial adalah metode panen sebagian biomassa udang pada saat kegiatan operasional budidaya sedang berlangsung. Tujuan dari penelitian ini adalah menentukan konseptual model optimalisasi pengelolaan budidaya udang vannamei (L. vannamei) pola intensif berdasarkan prosentase estimasi panen parsial. Penelitian ini dilaksanakan dengan konsep desain kausal ex-post facto selama satu siklus budidaya intensif udang vannamei (L. vannamei). Hasil dari penelitian menunjukkan, selama masa budidaya parameter kualitas air yang meliputi pH, suhu, oksigen terlarut, nitrit, dan nitrat masih berada dalam ambang batas, sedangkan posfat, TAN, dan TOM berada diatas level ambang batas baku mutu untuk budidaya udang intensif. Untuk konsep model simulasi pengelolaan budidaya intensif dari skenario panen non-parsial, parsial 10%, dan parsial 20%. Sistem panen parsial 10% memiliki beberapa keunggulan dibandingkan dua sistem panen lainnya. Yakni, dengan diterapkannya simulasi panen parsial 10% didapatkan nilai efisiensi biomassa panen sebesar 88.08 kg dan efisiensi prosentase survival rate udang sebesar 11% dibandingkan dengan konsep panen parsial 20% atau non-parsial. Sehingga dapat disimpulkan, bahwa untuk konsep model pengelolaan budidaya udang vannamei (L. vannamei) pola intensif yang paling optimal berdasarkan hasil simulasi sistem pemodelan dinamis adalah konsep model budidaya panen parsial 10% dengan pelaksanaan panen parsial pada saat budidaya umur 60 hari.

The diffusion process is a limiting factor that key plays for the oxygen transfer mechanism in the pond water column. The purpose of this study was to determine of oxygen diffusion rate during the blind feeding period of intensive shrimp culture of vaname (L. vannamei). This research was conducted for 30 days blind feeding period of intensive vaname shrimp culture, the research using concept of ex-pose facto causal design. Furthermore, the oxygen diffusion rate is calculated mathematically and a regression test is carried out on the associated water quality parameters. During the blind feeding period, the oxygen diffusion rate fluctuates and dynamically, with a diffusion rate ranging from 0.015-0.028 mgO2/L/hour. This condition is followed by a stabilizing and optimum condition of pond water quality parameter values throughout in the aquaculture. Diurnal periodically, the oxygen diffusion mechanism has an influence on the level of oxygen solubility in ponds. This relationship is modeled by the equation Y = 0.006 + 0.002x. This means that for each diffusion transfer increase of 1 mgO2/L/hour, there will be an oxygen increase in the ponds of 0.002 mg/L. The conclusion of this study is that the oxygen diffusion rate during the blind feeding period of intensive vaname shrimp culture obtained an average at 0.020 mgO2/L/hour, ranging from 0.018-0.023 mgO2/L/hour for 30 days of culture. From the results of this study, it is hoped that research can be developed study regarding of mechanisms, dynamics, and the effect of oxygen diffusion on the intensive shrimp farming ecology.

In intensive shrimp culture, oxygen consumption of shrimp is an important indicator that greatly affects the physiological condition of shrimp as a reared organism. The purpose of this study was to dynamically determine the oxygen consumption of shrimp in intensive culture as well as the variables of water quality and shrimp growth. This research was conducted with the concept of ex-post facto causal design in intensive aquaculture ponds during the shrimp cultivation period. During the shrimp culture period, the rate of oxygen consumption of shrimp is inversely related with the  sigmodial average increase in shrimp body weight. Meanwhile, based on the simulation analysis with the dynamic modeling concept, it is shown that oxygen consumption was linear to the dynamics of  average daily gain and inversely proportional with the increasing rate of shrimp biomass in the ponds. In addition, oxygen consumption rate of shrimp in intensive ponds had a close relationship with water salinity and total organic matter. In conclusion, dynamically, the fluctuation of oxygen consumption rate and average daily gain of shrimp in intensive culture are closely related to the stability of the water quality conditions on the shrimp habitat.

FCR or feed conversion ratio is one of the strategic indicators on pond production which is very important for determining the costs incurred during the shrimp culture period. The purpose of this study was to examine the relationship between water physico-chemical parameters and the conversion rate of shrimp feed in intensive shrimp ponds (Litopenaeus vannamei). The research method used in this study is the ex-pose facto design during shrimp culture cycle with uniformity of treatment during the cultivation process, then the research collective data obtained periodically is analyzed by multiple linear regression. The results of this study indicate that all pond water quality variables based on quality standards are still in accordance with the standards intended for aquaculture. While based on regression analysis and t-test, the temperature variable is the only parameter that has a direct influence on the FCR efficiency by shrimp. As well as temperature, salinity, and alkalinity variables are parameters that have a close level of relationship to the FCR value in the ponds of 84.1%, 79.1%, and 69.9%. The conclusion of this study is that in intensive ponds the parameters of temperature, salinity, and alkalinity are water quality parameters that have a close relationship with the efficiency of FCR values ​​in ponds, with temperature parameters being the water quality variable which has a direct influence on the effectiveness of the feed conversion ratio by shrimp.

Budidaya rumput laut adalah salah satu sub-kegiatan akuakultur yang sangat potensial untuk dikembangkan di Kecamatan Banyuputih, Situbondo. Tujuan dari penelitian ini adalah untuk memetakan kesesuaian lahan budidaya di Kecamatan Banyuputih Situbondo guna dapat digunakan sebagai area budidaya rumput laut berdasarkan nilai indikator parameter kimia air yang ada. Penelitian ini dilaksanakan di perairan pesisir Kecamatan Banyuputih, Situbondo selama bulan januari-maret 2019 dengan konsep penelitian lapang dan analisa spasial dari pengambilan data kimia air (oksigen terlarut, fosfat, dan nitrat) yang kemudian dianalisis menggunakan metode Inverse Distance Weighting (IDW) dan overlay pada aplikasi GIS (Geographic Information System) guna mendapatkan model visualisasi peta tematik kesesuaian lahan. Hasil penelitian menunjukan parameter oksigen terlarut, fosfat, serta nitrat berfluktuasi secara variatif dan dinamis selama masa penelitian berlangsung, dengan kisaran konsentrasi 5.4-6.1 mg/L (DO), 0.8-1.6 mg/L (PO4), dan 2.1-3.7 mg/L (NO3). Kondisi tersebut, menandakan bahwa perairan pesisir Kecamatan Banyuputih cenderung subur dan layak untuk digunakan sebagai lahan budidaya akuakultur. Pernyataan tersebut juga bisa dilihat dari hasil visualisasi warna pada gambar kesesuaian lahan di peta tematik peneltian. Nilai konsentrasi dari parameter DO (5.4-6.1 mg/L), fosfat (0.8-1.6 mg/L), dan nitrat (2.1-3.7 mg/L) di perairan Kecamatan Banyuputih juga masih sesuai dengan ambang batas baku mutu kualitas air yang diperuntukan untuk budidaya rumput laut. Sehingga dari penelitian ini dapat disimpulkan, dari berbagai gambar peta tematik hasil analisis spasial berdasarkan indeks parameter kimia air yang ada, lokasi perairan Kecamatan Banyuputih sangat layak dan potensial untuk dikembangkan sebagai area budidaya rumput laut yang produktif.