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

Jawad KASSİLA; Hassan NHHALA; Thierry GİVERNAUD; Mahdi MONSOURİ; Azzedine ABREHOUCH; Abdelhakim MOSFİOUİ

Makale detayları

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

Yazarlar:

Jawad KASSİLA | Hassan NHHALA | Thierry GİVERNAUD | Mahdi MONSOURİ | Azzedine ABREHOUCH | Abdelhakim MOSFİOUİ

Yayıncı:

Mersin University

Ana Başlıklar:

Ekoloji

Dergi:

Mediterranean Fisheries and Aquaculture Research 2019 Vol.2 Issue 1, pp.12-26

Belge Tipi:

Makale

Yayın Tarihi:

1/2019

Belge Dili:

İngilizce

Document ID (Org No.):

2000548384

Sıklık:

İki Yıllık

eISSN:

2618-6551

Özet:

 


The development of seaweed farming in Nador lagoon (NE Morocco,
Mediterranean Sea) offers the best hope for raising incomes in fishing
communities. The feasibility of growing red seaweed, Gracilaria
gracilis (Gigartinales, Rhodophyta) in off-bottom and floating
longline systems was investigated in Bouareg location. Several constraints such
as epiphytism and wood borers arose in off-bottom cultures. 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. The Gracilaria farming
may provide supplementary income to artisanal farmers in Nador lagoon.   



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Makale detayları

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

Yazarlar: Jawad KASSİLA | Hassan NHHALA | Thierry GİVERNAUD | Mahdi MONSOURİ | Azzedine ABREHOUCH | Abdelhakim MOSFİOUİ

Yayıncı: Mersin University

Ana Başlıklar: Ekoloji

Dergi: Mediterranean Fisheries and Aquaculture Research 2019 Vol.2 Issue 1, pp.12-26

Belge Tipi: Makale

Yayın Tarihi: 1/2019

Belge Dili: İngilizce

Document ID (Org No.): 2000548384

Sıklık: İki Yıllık

eISSN: 2618-6551

Sayı

Yazarlar:

Jawad KASSİLA | Hassan NHHALA | Thierry GİVERNAUD | Mahdi MONSOURİ | Azzedine ABREHOUCH | Abdelhakim MOSFİOUİ

Yayıncı:

Mersin University

Ana Başlıklar:

Ekoloji

Dergi:

Mediterranean Fisheries and Aquaculture Research 2019 Vol.2 Issue 1, pp.12-26

Belge Tipi:

Makale

Yayın Tarihi:

1/2019

Belge Dili:

İngilizce

Document ID (Org No.):

2000548384

Sıklık:

İki Yıllık

eISSN:

2618-6551