Efek Paparan Subletal Limbah Cair Industri Penyamakan Kulit terhadap Rasio Konversi Pakan dan Laju Pertumbuhan Ikan Nila (Oreochromis niloticus)

Main Article Content

Taufiq Ihsan
Tivany Edwin
Vira Elza

Abstract

ABSTRACT


Wastewater from the tanning industry of UPTD XX has entered the waters of Batang Anai River, West Sumatra. This wastewater quality exceeds the established quality standards and can be harmful to tilapia as a river biota. This study aimed to analyze the effect of sublethal tannery wastewater on food conversion ratio (FCR) and the specific growth rate (SGR) of tilapia. This study was conducted in three conditions: zero wastewater exposure (control), 1.85%, and 3.69% wastewater exposure. Each situation was set in triplo and observed for 28 days. We analyzed the correlation between duration exposure to the FCR and SGR by using regression and correlation analysis. Results showed an increase in the FCR value during observation in both wastewater exposure variations of 1.85% and 3.69%, with FCR values consecutively 1.19 and 1.75. At the same time, the control experiment showed a decreasing value of FCR. On the contrary, SGR values were decreased during observation in both wastewater exposure variations of 1.85% and 3.69%, consecutively 3.09% and 3.72%. While increasing SGR value was observed in the control experiment. A reliable correlation was obtained between the FCR and SGR ratio of tilapia to the exposure duration (r = 0.99). Furthermore, multivariate analysis showed a significant difference between the FCR and SGR to the variation and period of direction. It can be concluded that the longer the exposure time and the higher the concentration of exposure, decreasing the food uptake of tilapia and reducing the specific growth rate.


Keywords: tilapia, ratio growth rate, tannery wastewater, feed conversion, West Sumatra


 


ABSTRAK


Limbah cair dari industri penyamakan UPTD XX, Sumatera Barat telah memasuki perairan Sungai Batang Anai, Sumatra Barat. Kualitas air limbah ini melebihi standar kualitas yang ditetapkan dan dapat berbahaya bagi nila sebagai salah satu biota sungai. Penelitian ini bertujuan untuk menganalisis pengaruh air limbah penyamakan kulit terhadap Rasio Konversi Pakan (Food Conversion Ratio/FCR) dan Laju Pertumbuhan Spesifik (Specific Growth Rate/SGR) pada ikan nila. Penelitian ini dilakukan dalam tiga variasi, yakni tanpa paparan air limbah (uji kontrol), paparan air limbah 1,85% dan 3,69%. Setiap variasi dilakukan secara triplo dan diamati selama 28 hari. Korelasi antara lama paparan dengan rasio FCR serta SGR, dianalisis dengan menggunakan regresi dan analisis korelasi. Selanjutnya analisis multivariat menggunakan ANOVA two-way untuk melihat perbedaan signifikan FCR dan SGR terhadap variasi dan durasi paparan. Hasil penelitian menunjukkan peningkatan nilai FCR di kedua variasi paparan air limbah 1,85% dan 3,69% dengan nilai FCR berturut-turut 1,19 dan 1,75. FCR dalam uji kontrol menunjukkan penurunan nilai FCR. Sebaliknya, nilai SGR cenderung menurun selama pengamatan pada kedua variasi paparan air limbah 1,85% dan 3,69%, dengan nilai SGR berturut-turut 3,09% dan 3,72%, sementara peningkatan nilai SGR terjadi pada uji kontrol. korelasi yang sangat kuat diperoleh dari nilai FCR dan SGR terhadap durasi paparan (r = 0,99). Selanjutnya, uji signifikansi ANOVA menunjukkan perbedaan yang signifikan antara rasio FCR dan SGR dengan variasi dan durasi paparan air limbah. Dapat disimpulkan bahwa semakin lama waktu paparan dan semakin tinggi konsentrasi paparan air limbah, mengurangi serapan pakan ikan nila dan mengurangi tingkat pertumbuhan.


Kata kunci: ikan nila, laju pertumbuhan, limbah cair penyamakan kulit, rasio konversi pakan, Sumatra Barat

Article Details

Section
RESEARCH ARTICLES
Author Biography

Taufiq Ihsan, Universitas Andalas

Department of Environmental Engineering
Faculty of Engineering Universitas Andalas
Kampus Unand Limau Manis Padang

INDONESIA

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