Dissolved oxygen models in intensive culture of whiteleg shrimp, Litopenaeus vannamei, in East Java, Indonesia

Supriatna, - (2018) Dissolved oxygen models in intensive culture of whiteleg shrimp, Litopenaeus vannamei, in East Java, Indonesia. -. pp. 1-13. (Unpublished)

Abstract

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English Abstract

This study was conducted to determine a model of dissolved oxygen and its relationship with water quality in intensive aquaculture ponds of whiteleg shrimp, Litopenaeus vannamei in East Java. This study used a causal design with an ex-post-facto or natural phenomenon-based descriptive method in order to pursue the processes in the shrimp ponds and their existing conditions through observations of the intensive farming activities for about 100 days. Pond management followed a standard operating procedure under Best Aquaculture Practices Certification. Materials and facilities used in the study were eight intensive-patterned ponds of 3,292.50±347.02 m2, with a stocking density of 119.84±18.52 individuals m-2, production facilities and infrastructures, and water quality measuring equipment. The main water quality measured was dissolved oxygen at 22.00 hrs from the beginning of shrimp farming to the harvest time and daily dissolved oxygen measured every 2 hours to obtain a model of daily dissolved oxygen. Other supporting water quality parameters measured were daily pH, temperature, salinity, and transparency. Ammonium, nitrite, nitrate, phosphate, organic matter, carbonate, bicarbonate, total alkalinity, phytoplankton, and total bacteria were measured weekly. Data were collected and analyzed to assess the diversity of conditions in each pond and model the relationship of daily dissolved oxygen in one culture cycle. Correlation tests were also done between dissolved oxygen and other water quality measures. To determine the relationship between variables, data analysis used version 16 of SPSS. Results showed that mean dissolved oxygen in whiteleg shrimp farms was 4.84±0.41 ppm, and daily relationship model was Y = -0029 0732 T2 + T + 2.120 (R = 0.83; α = 0.01) with the highest dissolved oxygen recorded at 12:35 hours, whereas the relationship model of dissolved oxygen in one culture cycle was y = -0011 t + 5.7164 (R² = 0.71; α = 0.00). Dissolved oxygen was positively correlated with pH, temperature, transparency, and negatively correlated with salinity, phosphate, total organic matter, Shannon-Wiener index, dominance index and total bacteria

Item Type: Article
Identification Number: PUB/639.68/SUP/d/2018/081802715
Uncontrolled Keywords: SHRIMP CULTURE, PHYTOPPLANKTON, AQUACULTURE, LITOPENACUS
Subjects: 600 Technology (Applied sciences) > 639 Hunting, fishing & conservation > 639.6 Crustacean culture > 639.68 Shrimps culture
Divisions: S2/S3 > Doktor Ilmu Perikanan dan Kelautan, Fakultas Perikanan dan Ilmu Kelautan
Depositing User: Nur Cholis
Date Deposited: 08 Jan 2019 07:46
Last Modified: 09 Mar 2022 03:31
URI: http://repository.ub.ac.id/id/eprint/162566
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