**6. Floating cage development recommendations**

The results showed that floating cage had a significant effect on increasing seaweed production. Seaweed is completely protected from pests and ice–ice disease. Increased seaweed production will provide increased harvest income from seaweed cultivation. Floating cage is a very simple innovation tool that has a series of seaweed cultivation tools from PVC paralon and nets. This tool is very environmentally friendly if compared with the current seaweed method. At present, the longline method has various serious problems. The problem is, in certain areas, pests and epiphyte attachments occur as well as the use of used plastic bottles. The use of used plastic bottles is an act that is not environmentally friendly. Used plastic bottles used as buoys are seen to pollute the ocean and have a wider impact on organisms around the cultivation area (**Figure 14**).

The survey results explain that in 1 Ha longline cultivation area will require at least 200 used plastic bottles. Plastic bottles are used as buoys in seaweed cultivation. Used plastic bottles are taken from bottle wastes in the community environment. The use of used plastic bottles can be used only in 1 year of use; after 1 year usually these plastic bottles will leak and be thrown into the sea. Many serious problems occur among farmers. At present it is very important to develop an alternative seaweed cultivation that is environmentally friendly and has high productivity.

Floating cage that uses multifilament nets and PVC pipe does not cause environmental damage (**Figure 14**). PVC pipe is used as a float and also as a main pole to hold the net. PVC pipe series will last long enough in the waters. The use of PVC pipe and nets with good care will provide a long usage period. Arrangement of floating cage in the sea will look neatly arranged. The prospect of using floating cage has a very good future with various benefits. We got the advantage of using floating cage by interviewing farmers who use this tool in several seaweed

**Figure 14.** *Longline cultivation using used plastic bottles (A) and clean and beautiful floating cage arrangement (B).*

cultivation locations in Southeast Sulawesi, Indonesia. The results of our interviews are formulated in order of priority of the benefits obtained by the community in using floating cage tools. These advantages include:


The many advantages of using floating cage tools illustrated very clearly that the future use of floating cage methods will be very good. Although currently the use of floating cage is still limited to certain locations, however, this development

**115**

**Author details**

**7. Conclusion**

Rahmad Sofyan Patadjai1

\*, Abdul Muis Balubi1

Kendari, Southeast Sulawesi, Indonesia

provided the original work is properly cited.

and Wardha Jalil<sup>2</sup>

1 Faculty of Fishery and Marine Science, Halu Oleo University,

\*Address all correspondence to: marufkasim@uho.ac.id

, Ahmad Mustafa1

2 Faculty of Fishery, Dayanu Iksanuddin University, Baubau, Southeast Sulawesi,

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

, Rahman Nurdin1

,

Ma'ruf Kasim1

Indonesia

*Floating Cage: A New Innovation of Seaweed Culture DOI: http://dx.doi.org/10.5772/intechopen.90035*

because they are not attacked by fish.

analysis and literature assistance.

**Acknowledgements**

is in favor of the sustainability of other marine resources.

will continue to occur along with the desire to use prospective tools with excellent economic and ecological benefits. Cultivation communities will be able to choose to use tools that are economically and ecologically beneficial. The ecological advantage

Innovation of cultivation methods using floating cage gives good results to support the growth of *Kappaphycus alvarezii* and *Eucheuma denticulatum*. The growth of *K. alvarezii* looks quite good with a specific growth rate up to 6.4%/day using floating cage method. However, *K. alvarezii* only has 4.2% growth/day using the longline method. The floating cage method can truly protect seaweed from herbivorous fish. Thus, the growth of seaweeds *K. alvarezii* and *E. denticulatum* is better

I am grateful to the Ministry of Research, Technology and Higher Education of the Republic Indonesia, for the full research funding of this research project and to the Faculty of Fishery and Marine Science, Halu Oleo University, for the sample will continue to occur along with the desire to use prospective tools with excellent economic and ecological benefits. Cultivation communities will be able to choose to use tools that are economically and ecologically beneficial. The ecological advantage is in favor of the sustainability of other marine resources.
