Study of the Red Algae Growth Gelidium Sesquipedale Turner) Thuret (Rhodophyceae, Gelidiales) of Moroccan Atlantic Coast

Study of the Red Algae Growth Gelidium Sesquipedale Turner) Thuret (Rhodophyceae, Gelidiales) of Moroccan Atlantic Coast

Loading document ...
Loading page ...


Author(s): Noura HANIF, CHAIR mohammed, CHBANI IDRISSI mostapha, NAOKI tojo

Download Full PDF Read Complete Article

496 1300 77-85 Volume 3 - Jan 2014


The red algae Gelidium sesquipedale is the main source of agar; 44% of world production. This natural resource is subject to intensive exploitation and has significant signs of deterioration. To enable the local industry to continue its development, it was necessary to find new sources of raw material. In this regard, we conducted this study to show the best time of collection of this species. The pursuit of growth parameters (the length of the thallus, the mass of the fronds and the total number of branches) of Gelidium sesquipedale in the three stations (Lahdida (North of Azemmour), Moulay Abdellah and Sidi Abed) in the Moroccan Atlantic coast has identified the best period for collection from July to September each year.


red algae, Gelidium sesquipedale, production, resource, collection, agar, growth


  1. Marinho-Soriano E. and Bourret E. (2003). “Effects of season on the yield and quality of agar from Gracilaria species (Gracilariaceae, Rhodophyta)”. Biores.Techn. 90: 329-333
  2. Melo R. (1998). “Gelidium commercial exploitation: natural resources and cultivation”. Journal of Applied Phycology.10 (3): 303-314
  3. Givernaud Th., Mouradi A., Hassani L. M., Akallal R. and Riyahi J. (2003). “Design of a new technique for reseeding of over harvested bed of Gelidium sesquipedale (Turn.) Thuret (Rhodophyta, Gelidiales) in Morocco”. Proceeding of the 17th international seaweed symposium; Cap town. Eds. A.R.O. Chapman, R.J. Anderson, V. Vreeland & T.R. Davison, Oxford University press. 123-130
  4. Givernaud Th., Sqali N., Barbaroux O., Orbi A., Semmaoui Y., Rezzoum N., Mouradi A. and Kaas R. (2005). “Mapping and biomass estimation for a harvested population of Gelidium sesquipedale (Turn.) Thuret (Rhodophyta, Gelidiales) along the Atlantic coast of Morroco”. Phycologia. 44 (1) : 66-71
  5. Pérez R. (1997). “Ces algues qui nous entourent. Conception actuelle, rôle dans la biosphère, utilisations, culture».IFREMER. 272p
  6. Givernaud Th., El Gourji A., Mouradi A. and Givernaud, Lemoine Y. and Chiadmi N. (1999). “Seasonal variations of growth and agar composition of Gracilaria multipartite harvested along the Atlantic coasts of Morocco”. Hydrobiologia, 398/399 : 167-172p
  7. El Gourji A. (1999). Biologie et biochimie de l’agarophyte Gracilaria multipartita (Clemente) J Agath (Rhodophycées, Gracilariales). Thèse de Doctorat en sciences d’Université. Université Ibn Tofaïl, Faculté des Sciences, Kénitra, 166 p
  8. Goff L. J., Moon D. A. and Coleman A. W. (1994). “Molecular delineation of species and species relationships in the red algal agarophytes Gracilariopsis and Gracilaria (Gracilariales)”. J. Phycol. 30: 521-537
  9. Kabbaj I., (1994). “Biologie de Gelidium sesquipedale des côtes marocaines: étude des peuplements, écophysiologie, cytologie et morphogenèse”. Thèse de Doctorat d’Université, Univ. de Caen, France. 126 p
  10. Mouradi A., Benharbit O., Hassani L. M., Bennis M. and Givernaud Th. (2007). Analyse de la croissance et des variations morphologiques saisonnières de Gelidium sesquipedale (Turner) Thuret (Rhodophyceae, Gélidiales) de la côte atlantique marocaine. 443-455p
  11. Kaas R. and Barabaroux O. (1998). “Exploitation de la ressource en algue rouge Gelidium sesquipedale de la Bidassoa à l’Adour : Etude de l’impact d’une récolte industrielle par plongeur sur la ressource et sur les autres formes actuelles de ramassage”. 10ème rencontres interrégionales de l’AGLIA, Saint Jean de Luz, 20/21 novembre1997. 71-75P
  12. Mouradi A., Chikhaoui M., Fekhaoui M., Akallal R., Guessous A. and Givernaud T. (2006). Variabilité interspécifique de trois algues rouges : Hypnea musciformis, Gracilaria multipartita et Gelidium sesquipedale (Rhodophycées) de la côte atlantique marocaineAfrique SCIENCE 02(3) : 365 – 389 ISSN 1813-548X. 373-380p
  13. Silva J. and Santos R. (2003). “Comparative ecophysiology of Gelidium sesquipedale (Rhodophyta). Erect fronds and prostat system”. Proceeding of the 17th international seaweed symposium Cape town, A. R. O. Chapman, R. J. Anderson, V. Vreeland and T. R. Davison (eds), Oxford University press. 417-424p
  14. Salinas J. M. (1991). “Spray systeme for re-attachement of Gelidium sesquipedale (Clem.) Born. and Thur. (Gelidiales : Rhodophyta)”. Hydrobiologia. 221: 107- 117p
  15. Borja A. (1994). “Impacto de la cosecha y recuperation de la biomassa del alga Gelidium sesquipedale sometida a dos formas de exploitacion en el Pais Vasco (Espana)”. Aquat. Living Resour. 7: 59-66p

Cite this Article:

International Journal of Sciences is Open Access Journal.
This article is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License.
Author(s) retain the copyrights of this article, though, publication rights are with Alkhaer Publications.

Search Articles

Issue June 2024

Volume 13, June 2024

Table of Contents

World-wide Delivery is FREE

Share this Issue with Friends:

Submit your Paper