Abstract:
Seaweeds are macroscopic algae, which form an important component of the marine living
resource. Brown algae are economically important type of seaweeds which can be utilized in the
food industry and clinical medicine. Quantitative surveys carried out in the early eighties reviewed
that extensive beds of brown seaweeds were found in coastal region surrounding the Jaffna
peninsula. Therefore, this study was carried out to identify the sites in Jaffna peninsula which are
currently rich in brown seaweeds and to identify the important species in these regions. Initially
three visits were made along the coastal area of Jaffna peninsula to identify the sampling sites of
brown seaweeds. Coastal regions of Allaipiddy, Mandaitivu and Karainagar were selected as the
sampling sites based on the availability of brown seaweeds. Sample collection was made from the
coastal edge up to 100 m towards the ocean. Collected samples were identified based on their
morphological, anatomical and reproductive features with the help of standard key in the
laboratory. Five different species of brown seaweeds each were identified in the coastal region of
Allaipiddy, Mandaitivu and Karainagar. A total of 7 different species of brown seaweeds were
identified from these sites. The identified species of brown seaweeds include Sargassum
tennerimum, Sargassum polycystum, Turbinaria ornata, Turbinaria conoides, Turbinaria
murayana, Padina gymnospora, and Canistrocarpus crispatus. Further studies need to be carried
out to find out the potential uses of identified species.
