Opportunities for the development of seaweed farming as a supplementary income for small-scale fishermen in Nador lagoon: Experimental cultivations of Gracilaria gracilis (Stackhouse)
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). EKB Journal Management System, 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)". EKB Journal Management System, 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)', EKB Journal Management System, 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). EKB Journal Management System, 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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