Comparison of Growth and Biomass of Red Alga Cultured on Rope and Net

Authors: E. Kouhgardi, S. Dashti, H. Fekrandish

Abstract:

This research has been conducted to study the method of culture and comparing growth and biomass of Gracilaria corticata cultured on rope and net for 50 days through two treatments (first treatment: culture of alga on net and the second treatment: culture of alga on rope and each treatment was repeated by four cases). During culture period, the water of aquariums was replaced once every two days for 40-50%. Also, 0.3-0.5 grams of urea fertilizer was added to the culture environment for fertilization. Moreover, some of the environmental factors such as pH, salinity and temperature of the environment were measured on a daily basis. During the culture period, extent of longitudinal growth of the species of both treatments was equal. The said length was reached from 8-10 cm to 10.5-13 cm accordingly. The resulted weight in repetitions of the first treatment was higher than that of the second treatment in such a way as in the first treatment, its weight reached from 10 grams to 21.119 grams and in the second treatment, its weight reached from 10 grams to 17.663 grams. On a whole, it may be stated that that kind of alga being studied has a considerable growth with respect to its volume. The results have revealed that the percentage of daily growth and wet weight at the end of the first treatment was higher than that of the second treatment and it was registered as 0.934, 6.072 and 811.432 in the first treatment and 0.797, 4.990 and 758.071 in the second treatment respectively. This difference is significant (P<0.05). Growth and biomass of G. corticata through culture on net was more emphasizing on numerous branches due to wider bed. Moreover, higher level of the species in this method was exposed to sunlight and this increased biosynthesis and eventually increases of growth and biomass.

Keywords: Red alga, growth, biomass, culture, net, rope.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1100134

References:

[1] A. M. Abkenar, “Explore the possibility of growing algae and economic with an emphasis on Gracilaria in Natural areas and pools in soil. Final Report”, Iranian Fisheries Research and Training Organization, Fisheries Research Center Chabahar distant waters. p 115, 2004.
[2] H. Akbari, “Red algae Gracilaria cultivation in culture tanks”, Journal of World Aquaculture, No 23, pp 23-26, 2011.
[3] H. Akbari, Y. Aftabsavar, M., Malakooti, S. Tamadoni Jahromi, K. EjlaliKhankgah, “Gracilaria corticata cultivation in fiberglass tanks and Agar extraction”, Iranian Journal of Fisheries Sciences. Vol. 13, pp 27- 38, 2004.
[4] A. Chripart, M. Ohno, “Growth in tank culture of species of Gracilaria from the southeast Asian waters”, Botarica Marina, Vol. 36, pp 9-13, 1993.
[5] J.H. Connel, “Community interactions on marine rocky intertidal shores”. Ann. Rev. Ecol. Syst., Vol. 3, pp 169- 192, 1972.
[6] S. A. Dadolahi, M. Gravand Karimi, A. Emad Abady, “Seasonal variation distribution and biomass of algae in a tidal dominated coastal province (Northern coast of Persian Gulf)”, Journal of Oceanography, Vol. 3, No 9, pp 17-26, 2012.
[7] Y. Filizadeh, “Study of algae growing (Gracilaria corticata) on the coast of Qeshm Island”, Iranian Journal of Fisheries Sciences, Vol. 10, No. 4, pp 21-36, 2001.
[8] H. Fouroghi Fard, H. Akbari, E. Tazikeh, “Assessing the effects of urea and TMRL media on laboratory cultivation of Gracilaria corticata”, Iranian Journal of Fisheries Sciences, Vol. 14, No. 1, pp 87- 97, 2005.
[9] B. M. Gharanjic, “Density, Biomass and Frequency of three Main species of brown algae Cystoseira indica, Sargassum glausences, Nizimuddini azanardinii in the coastal province of Sistan and Baluchestan”, Iranian Journal of Fisheries Sciences, Vol. 11, No. 3, pp 91-102, 2002.
[10] R. Jayasankar, C. Seema, K.S. Leelabhal, A. Kanagam, “Pond based grows out system of Gracilaria verrucosa”, Journal of Aquaculture in the Tropics, Vol. 21, No. 3-4, pp 161-167, 2006.
[11] L. A. Navaro, D. Rabledo, “Effects of nitrogen source, N: P ratio and NPulse concentration and frequency on the growth of Gracilaria cornea in culture”, Journal of Hydrobiology, Vol. 398/399, pp 315-320, 1999.
[12] E. C. Oliveria, K. Aveal, R.J. Anderson, “Mariculture of the agar producing Gracilaria Red algae”, Journal of review in fisheries science, Vol. 8, No. 4, pp 345- 377, 2000.
[13] A.R.D. Stebbing, “Competition for space between the epiphytes of Fucusserratus”, Journal of Marine Biology Assessment, Vol. 53, pp 247-261, 1973.
[14] Y.C. Wang, G.Y. Pan, L.C.M. Chen, “Studies on agarophytes”, Bot. Mar., Vol. 37, pp 265- 268, 1984.