Kesan Persekitaran Dan Nutrien Terhadap Kadar Pertumbuhan, Kandungan Klorofil A, Berat Kering Dan Kandungan Agar Rumpai Laut Merah Gracilaria Manilaensis (Rhodophyta, Gracilariaceae)

• Main Author: Abdul Latib, Hafizah
• Format: Thesis
• Language: English
• Published: 2016
• Subjects: QH1 Natural history (General - Including nature conservation, geographical distribution)
• Online Access: http://eprints.usm.my/31839/1/HAFIZAH_BINTI_ABDUL_LATIB_24%28NN%29.pdf; http://eprints.usm.my/31839/

Kajian dijalankan untuk mengkaji kesan keamatan cahaya, pergerakan air, kedalaman air, berat awal kultur dan kandungan nutrien (NH4+, NO3- dan PO42-) terhadap pertumbuhan, kandungan klorofil a, berat kering dan kandungan agar pada rumpai laut merah Gracilaria manilaensis. Kajian telah dijalankan di kolam udang terbiar di Merbok, Kedah dan juga di makmal Universiti Sains Malaysia (USM) dari Jun 2008 hingga Jun 2010. Keputusan kajian pengkulturan dengan berat awal kultur yang sedikit menghasilkan Kadar Pertumbuhan Relatif (KPR) yang lebih tinggi (200g>500g>1,000g). Terdapat perbezaan kandungan klorofil a antara berat awal kultur 200g dengan 500g dan 1,000g (200g>500g=1,000g). Berat kering bagi berat awal kultur 500g dan 200g adalah lebih tinggi (500g=200g>1,000g) namun tiada perbezaan yang signifikan terhadap kandungan agar (P>0.05). A study was carried out to determine the effect of light intensity, water movement, water depth, initial stocking density and nutrient content (NH4+, NO3- and PO42-) on the growth, chlorophyll a concentration, dry weight and agar yield of the red macroalgae Gracilaria manilaensis. The study was conducted in an abandoned shrimp pond in Merbok, Kedah and in the laboratory of Universiti Sains Malaysia (USM) from June 2008 until June 2010. Results showed that the culture with low initial weight produced higher Relative Growth Rate (RGR) (200g>500g>1,000g). Chlorophyll a content showed a significant difference between 200g culture compared to 500 and 1,000g (200g>500g=1,000g). Dry weight for 500g and 200g culture were significantly high (500g=200g>1,000g) but both showed no significant differences for the agar yield (P>0.05).