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All Journal Jurnal Aquatik
Ade Yulita H. Lukas
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Agriculture, Biological Sciences & Forestry

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OPTIMALISASI LOKASI PENANAMAN RUMPUT LAUT KAPPAPHYCUS ALVAREZII UNTUK MENINGKATKAN KELANGSUNGAN HIDUP, PETUMBUHAN MUTLAK DAN KANDUNGAN KARAGENAN Graselia Fallo; Ade Yulita H. Lukas; Welem Linggi Turupadang
Jurnal Aquatik Vol 9 No 1 (2026): Edisi Maret 2026
Publisher : Nusa Cendana University

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Abstract

Kappaphycus alvarezii is a high-value seaweed commodity widely cultivated as a primary source of carrageenan. The success of its cultivation is strongly influenced by environmental conditions, including the planting distance from the shoreline, which may affect water quality and growth performance. This study aimed to assess the effect of different planting distances on growth, survival rate, and carrageenan content of K. alvarezii. The experiment was conducted for 45 days in Oenaek waters using a Completely Randomized Design (CRD) with three treatments and three replicates, namely planting distances of 100 m (A), 300 m (B), and 500 m (C) from the shoreline. Data were analyzed using ANOVA, followed by post-hoc tests at a 95% confidence level when significant differences were observed. Results revealed that planting distance significantly affected absolute growth (p<0.05), with the highest value recorded in treatment C (500 m) at 163.11 ± 0.31 g. The highest carrageenan content was obtained in treatment B (300 m) at 18.226%, while survival rate reached 100% across all treatments. These findings highlight that planting distance influences both growth and carrageenan yield, suggesting that site selection should be aligned with production objectives, whether to maximize biomass or optimize carrageenan content. Keywords: Kappaphycus alvarezii, survival, absolute growth, carrageenan, water quality
Produktivitas Rumput Laut Kappaphycus alvarezii pada Musim yang Berbeda di Perairan Rote Ndao, Nusa Tenggara Timur Wildan Faturrachman Emaona; Ade Yulita H. Lukas; Jusuf Roniena Manilapai
Jurnal Aquatik Vol 9 No 1 (2026): Edisi Maret 2026
Publisher : Nusa Cendana University

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Abstract

Seaweed, particularly Kappaphycus alvarezii, is a leading commodity with high economic value due to its carrageenan content, which is widely used in the food, cosmetics, and pharmaceutical industries. Seaweed cultivation productivity is strongly influenced by aquatic environmental conditions, including seasonal dynamics. This study aims to analyze the effect of seasonal variations (rainy season, transition season, and dry season) on seaweed productivity in Rote Ndao Regency. The study was conducted from June to August in Daiama Village, Landu Leko District, using a survey method through interviews With seaweed farmers using questionnaires. Data were analyzed using pearson correlation and One-Way ANOVA. The results showed that the highest productivity occurred in the transition season, followed by the dry season, and the lowest in the rainy season. The Pearson Correlation test showed a significant relationship between season and productivity with a correlation coefficient value of 0.422 (p < 0.05), indicating a moderate relationship with a positive direction. Ecologically, the transition season provides more stable and optimal water conditions for seaweed growth, while the rainy and dry seasons tend to put environmental pressure. Thus, the season significantly impacts seaweed productivity, making determining the right planting time a crucial factor in optimally and sustainably increasing cultivation yields. Key words: Kappaphycus alvarezii, produktivity, rote ndao, season, seaweed
Co-Authors Graselia Fallo Jusuf Roniena Manilapai Welem Linggi Turupadang Wildan Faturrachman Emaona