The performance of seaweed Kappaphycus alvarezii and Kappaphycus striatum in tank culture system
Little is known on the performance of seaweed cultured in land-based facilities. The present study was conducted to determine the growth performance of Kappaphycus in tank and the effects of tank culture to the seaweed biochemical composition. Two tank culture systems were completed using circula...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
2015
|
| Subjects: | |
| Online Access: | https://eprints.ums.edu.my/id/eprint/17412/1/The%20performance%20of%20seaweed.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Little is known on the performance of seaweed cultured in land-based facilities. The
present study was conducted to determine the growth performance of
Kappaphycus in tank and the effects of tank culture to the seaweed biochemical
composition. Two tank culture systems were completed using circular and raceway
tanks and three cultures of 40-days period were performed in each system. Red
seaweeds, Kappaphycus alvarezii and Kappaphycus striatum were selected and
cultivated in each tank culture system. Using circular tank, four different treatment
tanks (Tl with only filtered seawater, T2 with fertilizer enrichment only, T3 with
substrate addition only and T4 with the combination of fertilizer enrichment and
substrate addition) were tested. In the circular tank culture system, both species
were mutually cultivated via line culture method and the seaweed density was
reduced accordingly in every culture (Culture 1: 2.40 g L⁻¹, 2: 1.92 g L⁻¹ and 3: 0.96
g L⁻¹
). Using Two-way ANOVA statistical analysis, there were no significant
differences between the between the factors tested (fertilizer enrichment and
substrate addition) and the daily growth rate of Kappaphycus (p>0.05) in every
culture with different seaweed density. The maximum daily growth rate was
recorded in T4 with lowest seaweed density of 0.96 g L⁻¹ during Culture 3 on K.
striatum (2.00±0.03% day⁻¹) and K. alvarezii (1.46±0.06% day⁻¹). In the second
part of study, raceway tank was used and modified without any fertilizer
enrichment and substrate addition needed. Both Kappaphycus were cultured using
loose method in raceway tank. The results indicated that both Kappaphycus
succeeded to grow with the highest average daily growth rate for K. striatum was
2.96±0.02% day⁻¹ and for K. alvareziiwas 2.13±0.03% day⁻¹ with zero nutrient or
substrate enrichment during Culture 2. Kappaphycus striatum was found to grow
well in both system compared to K. alvarezi. The results also showed that the
biochemical composition of both tank cultured Kappaphycus were comparable with
the open sea culture where the average percentage of crude protein, crude fibre
and carrageenan content of the Kappaphycus cultured in the tank were fall within
the range mentioned in the previous literature. Thus, tank culture system did not
significantly affect the biochemical composition of the Kappaphycus. In conclusion,
the success in cultivating Kappaphycus using circular and raceway tank indicated
that seaweeds are highly potential to be cultivated in land-based facilities
comparable with the open sea culture seaweeds. These findings are significant to
provide a baseline data and facilitate seaweed research area especially for high
quality seaweed seedling production in the future. |
|---|