Proceedings of the Second Mediterranean Symposium on Marine

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REFERENCES Association <strong>of</strong> Official Analytical Chemists. (1990) - Official methods <strong>of</strong> analysis. 14th ed AOAC, Washigton, DC Cho C.Y., Kaushik S. J. (1990) - Nutrition energetic in fish : energy and protein utilisation in rainbow trout (Salmo gairdeneri).Word Rev. Nutr. Diet., 61 : 132-172. Erfanallaht Jafii A. K. (1995) - Growth response <strong>of</strong> fingerling Indian major carp, Labes rohita(ham.) to various sources <strong>of</strong> dietary carbohydrate. J Aqua.Trop., 10 : 287-296. Gaugadhara B., Nandeesha M.C., Varghese T. J., Keshavanath P. (1997) - Effect <strong>of</strong> varying protein and lipid levels on <strong>the</strong> growth <strong>of</strong> rohu, labeo rohita. Asian Fish. Sci., 10 : 139-149. Guillaume J., Kaushik S., Bergot P., Métailler R. (1999) - Nutrition et alimentation des poissons et crustacés. INRA Éditions : 485 pp Jauncy K., Falaye A. E. (1999) - Body composition <strong>of</strong> acceptability and digestibility by Tilapia Oreochromus niloticus <strong>of</strong> feeds containing coca husk. Aquaculture Nutrition, 5 : 157-161. Ksouri J. (2002) - Valorisation des végétaux marins par l’extraction de produits d’intérêt économique et par la culture.INSTM – Salammbo. Manandhar H. N. (1977) - Digestibility <strong>of</strong> phytoplankton by silver and three tilapias in polyculture with channel catfish. Master’s Thesis, Auburn University, Auburn, AL. Mbhinzirek G. B., Dabrowski K., Lee K. J., El Saidy D., Wisner E. R. (2001) - Growth feed utilisation and body composition <strong>of</strong> Tilapia (Oreochromis Sp.) Fed with cottonseeds meal – based diets in recirculating system. Aquaculture Nutrition, 7 : 189-200. Miguel A., Olvera-Novoa S., Campos G., Mirna Sabido G., Martinez Palacios C.A., (1990) - The use <strong>of</strong> alfalfa leaf protein concentrates as protein source in diets for Tilapia (Orechromis mossambicus). Aquaculture, 90 : 291-302. Pompa,T.J. (1982) - Digestibility <strong>of</strong> selected feedstuffs and naturally occurring algae by Tilapias. Ph.D.Diss., Auburn University, Auburn, AL. Shian S.Y., Perus C. Y. (1993) - Protein sparing effects by carbohydrates in diets for Tilapia Oreochromis niloticus X O.aureus. Aquaculture, 117 : 327-339. Lovell T. (1988) - Nutrition and feeding <strong>of</strong> fish. AVI Book, Publié par Van Nostrand Reinhold, New York. Wassef E. A., El – Sayed A. M., Kandeel K. M., Mansour H. A., Sakr E. M. (2000a) - The effect <strong>of</strong> feeding Pterocladia and Ulva Sp.meal in diets for Gil<strong>the</strong>ad bream Sparus aurata L. 10th International <strong>Symposium</strong> on Nutrition and Feeding in Fish. Feeding for Quality. 2-7 June 2002. Rhodes – Greece. Wassef E. A., El – Sayed A. M., Kandeel K. M., Mansour H. A., Sakr E. M. (2000b) - Evaluation <strong>of</strong> two macroalgae (Pterocladia and Ulva Sp.) as dietary supplement for European Seabass Dicentrarchus labrax L. 10th International <strong>Symposium</strong> on Nutrition and Feeding in Fish. Feeding for Quality. 2-7 June 2002. Rhodes – Greece. ACTES DU DEUXIEME SYMPOSIUM MEDITERRANEEN SUR LA VEGETATION MARINE (ATHENES, 12-13 DECEMBRE 2003) 185
PROCEEDINGS OF THE SECOND MEDITERRANEAN SYMPOSIUM ON MARINE VEGETATION (ATHENS, 12-13 DECEMBER 2003) 186 MARINE BENTHIC MACROPHYTES AS BIOINDICATORS OF EUTROPHICATION IN SELECTED EASTERN MACEDONIAN & THRACE LAGOONS, NORTH GREECE Sotiris ORFANIDIS, Enaggelia TSIAGGA and Nikolaos STAMATIS Fisheries Research Institute, National Agricultural Research Foundation, 640 07 Nea Peramos, Kavala, GREECE (sorfanid@otenet.gr) ABSTRACT The marine benthic macrophytes were monitored across an eutrophication gradient <strong>of</strong> selected Macedonian & Thrace lagoons. Ruppia cirrhosa was <strong>the</strong> most abundant angiosperm dominated in pristine lagoons or sites within lagoon; <strong>the</strong> seaweeds Gracilaria bursa-pastoris, Ulva sp. and Cystoseira barbata, dominated in eutrophicated lagoons/sites. Angiosperms and seaweed coexisted at intermediate conditions. Seaweed community and key environmental parameters were more intensively monitored (2 sites x 13 months x 3 samples) in <strong>the</strong> eutrophicated lagoon Vassova. Multivariate techniques at species- and functional group-level and <strong>the</strong> Ecological Evaluation-EEI index indicated <strong>the</strong> spatio-temporal variability <strong>of</strong> water eutrophication. A cost-effective monitoring system <strong>of</strong> benthic macrophytes in lagoons could include summer destructive samplings, functional-form classification, and use <strong>of</strong> <strong>the</strong> EEI. KEY-WORDS: monitoring, functional groups, angiosperms, seaweeds, ecological evaluation index INTRODUCTION Bioindicators are readily measured components <strong>of</strong> <strong>the</strong> biota that are used by managers to provide long-term ecologically relevant information about <strong>the</strong> quality (state) <strong>of</strong> ecosystem (Anderson, 1999). This approach effectively distinguishes responses <strong>of</strong> human impact from natural variability, when supported by predictive modeling and sound ecological <strong>the</strong>ory. It was recently adopted by <strong>the</strong> European Union (Water Framework Directive) in order to evaluate water quality in five Ecological Status Classes (ESC) from bad to high. Marine benthic macrophytes (seaweed and seagrasses) are key structural and functional components <strong>of</strong> some <strong>of</strong> <strong>the</strong> most productive ecosystems <strong>of</strong> <strong>the</strong> world, including lagoons. As photosyn<strong>the</strong>tic sessile organisms, <strong>the</strong>y respond directly to aquatic environment, and thus represent good indicators <strong>of</strong> its changes. Extensive field and laboratory experimentation have provided mechanistic explanations <strong>of</strong> <strong>the</strong>ir communityenvironment interactions. Eutrophication is a human induced disturbance mainly caused by nitrogen and phosphorus added to water, as well as to o<strong>the</strong>r biological and chemical processes (de
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United Nations Environment Programm
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PROCEEDINGS OF THE SECOND MEDITERRA
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CONTENTS/SOMMAIRE Programme .......
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ORFANIDIS S., TSIAGGA E. & STAMATIS
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Friday 12 December 2003 09:00 Openi
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Discussion Discussion - Littoral be
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MAPPING MARINE VEGETATION DISTRIBUT
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1984; Boudouresque et al., 1985b; M
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Elbu cove, Scandula nature 1/ 1190
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features of P. oce
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Belsher T., Houlgatte E. (2000) - E
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Gloux B. (1984) - Méthodes acousti
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Pasqualini, V., Pergent-Martini, C.
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Here, we will firstly delineate wha
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Fig. 2. The tree of</strong
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In the same way, "
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While the
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COASTAL DEVELOPMENT The destruction
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invaders, overfishing and climate c
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At the end <strong
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to be built up, this disappearance
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Boudouresque C.F., Ribera M.A. (199
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Marchand M. (1981) - Amoco Cadiz. B
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FLORISTIC SIMILARITY AND DISCONTINU
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871 accepted taxa (Table 1). Howeve
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Fig. 2. Hystogram showing t
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4 (1.6%) and 2 (1.1%) at Spain; 5 (
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characteristics of
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Fig. 9. Hystogram showing t
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Fig. 11. Dendrogram depicting mutua
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REFERENCES Agardh C. A. (1822-1823)
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De Toni G. B. (1905) - Sylloge Alga
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Langenbach G. (1873) - Die Meeresal
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SESSION «BIOLOGY, ECOLOGY AND INVE
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SESSION ‘MAPPING MARINE VEGETATIO
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Page 135 and 136: PROCEEDINGS OF THE SECOND MEDITERRA
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Page 166 and 167: RESULTATS A- PHENOLOGIE Les princip
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Mr Baris AKÇALI D.E.U. Institute <
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Mr Francesco Saverio CIVILI MED POL
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Mr Jamel KSOURI Laboratoire de Biod
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Mr Frédéric PLATINI Accord RAMOGE
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Ms Eleni TRYFON Natural Environment
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Proceedings of the Second Mediterranean Symposium on Marine

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