Kassila, J., Nhhala, H., Givernaud, T., mansouri, E., yazami, O., Abrehouche, A., mesfioui, A., Idhalla, M. (2022). Opportunities for the development of seaweed farming as a supplementary income for small-scale fishermen in Nador lagoon: Experimental cultivations of Gracilaria gracilis (Stackhouse). test, 9(1), 46-57. doi: 10.21608/maj.2022.5857.1003
Jawad Kassila; Hassan Nhhala; Thierry Givernaud; El mahdi mansouri; Outmane yazami; Azzedine Abrehouche; Abdelhakim mesfioui; Mohamed Idhalla. "Opportunities for the development of seaweed farming as a supplementary income for small-scale fishermen in Nador lagoon: Experimental cultivations of Gracilaria gracilis (Stackhouse)". test, 9, 1, 2022, 46-57. doi: 10.21608/maj.2022.5857.1003
Kassila, J., Nhhala, H., Givernaud, T., mansouri, E., yazami, O., Abrehouche, A., mesfioui, A., Idhalla, M. (2022). 'Opportunities for the development of seaweed farming as a supplementary income for small-scale fishermen in Nador lagoon: Experimental cultivations of Gracilaria gracilis (Stackhouse)', test, 9(1), pp. 46-57. doi: 10.21608/maj.2022.5857.1003
Kassila, J., Nhhala, H., Givernaud, T., mansouri, E., yazami, O., Abrehouche, A., mesfioui, A., Idhalla, M. Opportunities for the development of seaweed farming as a supplementary income for small-scale fishermen in Nador lagoon: Experimental cultivations of Gracilaria gracilis (Stackhouse). test, 2022; 9(1): 46-57. doi: 10.21608/maj.2022.5857.1003

Opportunities for the development of seaweed farming as a supplementary income for small-scale fishermen in Nador lagoon: Experimental cultivations of Gracilaria gracilis (Stackhouse)

Mediterranean Aquaculture Journal
Article 5, Volume 9, Issue 1, 2022, Pages 46-57    PDF (654.78 K)
Document Type: Original Article
DOI: 10.21608/maj.2022.5857.1003
Authors
Jawad Kassila* 1; Hassan Nhhala1; Thierry Givernaud2; El mahdi mansouri3; Outmane yazami4; Azzedine Abrehouche1; Abdelhakim mesfioui5; Mohamed Idhalla1
1Aquaculture Department, INRH, Morocco
2Stecof Co., Kenitra
3Agence Nationale de Développement de l’Aquaculture (ANDA) , Rabat, Morocco
4Dep., of Sciences Faculty of Polydisciplinaire, Larache, Morocco
5Centre Régional de Nador, INRH, Nador, Morocco
Abstract
The feasibility of growing red seaweed, Gracilaria gracilis (Gigartinales, Rhodophyta) in off-bottom and floating longline systems was investigated in Bouareg location. The weight gains of G. gracilis in off-bottom cultures tested in winter, were low. The lowest daily growth rate (DGR) was recorded in sheet-lines (1.91 % day-1, p < 0.01) while the highest’s RGR were observed in net-lines and ropes-lines (2.72 and 2.77 % day-1 respectively, p < 0.01). Plants of G. gracilis grew well in the floating longline culture tested at spring. The weight growth rates ranged between 2.54 and 4.26 % day-1. The highest growth rate in Nador lagoon was observed in treatment stocked with 0.6 kg m-2. The high stocking density (0.8 kg m-2) leaded to low growth most probably due to stress on the seaweed when competing for space and resources. Over a 60-day cycle, the harvest of G. gracilis cultivated on floating longline system in Nador lagoon was estimated at about 101 t FWT ha-1 year-1. With 8:1 as wet to dry ratio, the production yield per cropping was estimated at 3,156 kg (DW) per ha. However, the total sales per year was estimated at about $ 6,564 per ha.
Keywords
Gracilaria gracilis; culture; Nador lagoon; income; fishermen
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