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Registros recuperados: 39 | |
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Lahbib, Youssef; Abidli, Sami; Chiffoleau, Jean-francois; Averty, Bernard; El Menif, Najoua Trigui. |
We have assessed for the first time the current status of tributyltin (TBT) contamination in Hexaplex trunculus along Tunisian coastal waters. Two sampling campaigns have been performed in July 2004 and July 2007 at seven different sites. The snails were analyzed for imposex status, i.e. Imposex incidence, Relative Penis Length Index (RPLI) and Vas Deferens Sequence Index (VDSI), followed by the quantification of butyltins in their tissues. Imposex was detected in six populations from the 2004 samples and in five populations from the 2007 samples. The imposex incidence ranged from 0 (no imposex) to 100%, the RPLI from 0 to 56.7 and the VDSI from 0 to 4.4. TBT was also detected in six populations in 2004 and five populations in 2007. The concentrations... |
Tipo: Text |
Palavras-chave: Tunisia; Imposex; Hexaplex trunculus; TBT; Tributyltin. |
Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6499.pdf |
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Khoufi, Widien; Dufour, Jean-louis; Jaziri, Hela; Elfehri, Safouene; Elleboode, Romain; Bellamy, Elise; Ben Meriem, Sadok; Romdhane, Mohamed Salah; Mahe, Kelig. |
Growth parameters of any species are fundamental for biological or dynamic studies. The quality of the estimation for these parameters directly impacts on species stock assessment and, as a consequence, on fisheries management. In order to improve fishery and species stock management, growth analysis, especially by sex, is recommended. In this study, otoliths were used to estimate growth parameters of Merluccius merluccius Rafinesque, 1810. Hake is well-known as being a species in which otolith interpretation is extremely difficult. To estimate growth parameters, the first daily increment was validated as the tool for age determination. Otolith interpretation was done according to the last results of ICES cooperative research report. In total, a sample of... |
Tipo: Text |
Palavras-chave: Merlucciidae; Merluccius merluccius; Tunisia; Western Mediterranean; Age estimation; Growth model; Otolith. |
Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00191/30238/28662.pdf |
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Shaiek, Moez; Romdhane, Mohamed Salah; Le Loc'H, Francois. |
In order to define the structure of trophic network of Ichkeul Lake in Tunisia, diet of main teleost fish species was determined during two seasons, wet and dry. A total of 491 stomachs from 16 teleost species was analyzed. The analysis revealed spatial variability (East under marine influence and West with more continental effect) and temporal one (wet and dry seasons). Based on stomach contents, nine trophic groups were revealed, including eight monospecific groups. The main prey are mudflat snails (Hydrobia ventrosa, H. acuta), bivalves (Abra alba, Cerastoderma glaucum), amphipods and isopods, as well as seagrass (Potamogeton pectinatus, Ruppia cirrhosa) and water brackish algae (Ulva spp. and Chaetomorpha spp., Cladophora sp., Polysiphonia sp.). |
Tipo: Text |
Palavras-chave: Ichthyofauna; Tunisia; Ichkeul Lake; Stomach contents; Prey; Diet; Trophic group. |
Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00294/40541/73188.pdf |
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Lapegue, Sylvie; Ben Salah, Ines; Batista, Frederico; Heurtebise, Serge; Neifar, L; Boudry, Pierre. |
Despite the economic importance of oysters due to the high aquaculture production of several species, the current knowledge of oyster phylogeny and systematics is still fragmentary. In Europe, Ostrea edulis, the European flat oyster, and Ostreola stentina, the Provence oyster or dwarf oyster, are both present along the European and African, Atlantic and Mediterranean, coasts. In order to document the relationship not only between O. stentina and O. edulis, but also with the other Ostrea and Ostreola species, we performed a sequence analysis of the 16S mitochondrial fragment (16S rDNA: the large subunit rRNA-coding gene) and the COI fragment (COI: cytochrome oxidase subunit I). Oysters were sampled from populations in Portugal (two populations), Tunisia... |
Tipo: Text |
Palavras-chave: Tunisia; Portugal; Marocco; Ostreola stentina; Ostreola equestris; Ostrea aupouria; Phylogeographic study. |
Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1912.pdf |
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Kahlaoui,B; Hachicha,M; Rejeb,S; Rejeb,M.N; Hanchi,B; Misle,E. |
A field experiment on the effects of drip irrigation (DI) and subsurface drip irrigation (SDI) with saline water (6.57 dS m-1) on three tomato cultivars (Lycopersicon esculentum Mill., cvs. Rio Tinto, Rio Grande and Nemador) was carried out with the purpose to quantify physiological responses. The aim was to improve irrigation water management under saline conditions of Tunisia. The trial was established in a silt-clayey soil with three regimes of irrigation: 100 %, 85 % and 70 % of crop water requirement. Results evidenced a significant difference between the two irrigation systems for the three cultivars. Growth parameters such as leaf area, chlorophyll content and mineral composition of leaves, petioles, stems and roots were affected significantly by... |
Tipo: Journal article |
Palavras-chave: Salt tolerance; Tomato; Localized irrigation; Deficit irrigation; Tunisia. |
Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162011000100007 |
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Jarboui, O.; Ben Abdallah, O.; Missaoui, H.; Ben Hadj Hamida, N.. |
Les crevettes, particulièrement Penaeus kerathurus, sont considérées parmi les espèces de crustacés les plus exploitées au niveau des côtes tunisiennes, essentiellement dans le golfe de Gabès. Depuis l’année 1993, une nouvelle espèce de crevette d’origine lesseptienne est apparue dans le golfe et s’est bien adaptée avec ses conditions climatiques et environnementales : c’est la crevette blanche Metapenaeus monoceros. L’objectif principal de cette étude consiste à suivre l’exploitation de cette espèce dans la région du golfe de Gabès, à étudier sa croissance relative et à déterminer la composition des captures selon le sexe. D’après les résultats obtenus nous avons pu constater que, durant la dernière décennie, la production de cette espèce dans le golfe de... |
Tipo: Journal Contribution |
Palavras-chave: Crevettes; Espèces exotiques; Exploitation; Croissance; Shrimps MED; Tunisia; Gabes Gulf Metapenaeus monoceros Growth Introduced species Marine crustaceans Sex ratio Growth Sex ratio http://aims.fao.org/aos/agrovoc/c_3394 http://aims.fao.org/aos/agrovoc/c_7014. |
Ano: 2003 |
URL: http://hdl.handle.net/1834/1076 |
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Romdhane, M.S.; El Abed, A.; Zarrad, R.; M’rabet, R.; Missaoui, H.. |
Pendant l’été et l’automne de l’année 2002, deux campagnes d’étude de l’ichtyoplancton ont été effectuées dans le golfe de Tunis. La température moyenne des eaux de surface a été de 25,51°c en été et 21,85°c en automne. Les œufs et les larves ont été plus abondants en été qu’en automne (360 œufs /10m² et 244 larves /10m² en été et 115 œufs /10m² et 174 larves /10m² en automne). Les paramètres environnementaux : température, salinité oxygène dissous, pH, chlorophylle a et abondance du mésozooplancton ne semblent pas avoir une influence directe sur la distribution spatiale de l’ichtyoplancton. Cependant, la bathymétrie semble avoir une influence sur cette distribution. |
Tipo: Journal Contribution |
Palavras-chave: Mésozooplancton; Golfe de Tunis; Plankton; Zooplankton MED; Tunisia; Tunis Gulf Abundance Distribution Environmental factors Ichthyoplankton Zooplankton Distribution Environmental factors Zooplankton http://aims.fao.org/aos/agrovoc/c_35773 http://aims.fao.org/aos/agrovoc/c_2594 http://aims.fao.org/aos/agrovoc/c_15490. |
Ano: 2003 |
URL: http://hdl.handle.net/1834/1075 |
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Van Ballaer, E.; Versichele, D.; Vanhaecke, P.; Léger, P.; Ben Abdelkader, N.; Turki, S.; Sorgeloos, P.. |
<i>Artemia</i> cysts have been collected from different saltworks and natural salt lakes in Tunisia. The cyst material was processed and used for the following characterization analyses: cyst and naupliar biometrics, cyst hatching characteristics, fatty acid pattern of the nauplii, nutritional value of the nauplii for mysid shrimp, naupliar growth rate and temperature resistance, mode of reproduction, and characterization of sibling species. The cross-breeding tests and cyst biometrics reveal that only <i>Artemia tunisiana</i> occurs in Tunisia. Although quality improvements may be expected through improved harvesting, Tunisian <i>Artemia</i> have acceptable hatching characteristics and are a good food for mysid shrimp.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artemia; Tunisia. |
Ano: 1987 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3207 |
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Hamdi, Hnia; Majdoub-Mathlouthi, Linda; Znaïdi, Ibrahim El-Akram; Aissa, Asma; Kraiem, Khemaes. |
La réglementation de l’élevage ovin en mode biologique (MB) limite l’incorporation du concentré à un maximum de 40% avec un accès obligatoire au parcours. En Tunisie, la viande d’agneau de race Barbarine élevé sur parcours est reconnue par une meilleure qualité nutritionnelle (MajdoubMathlouthi et al., 2010). Néanmoins, la qualité du parcours est très dépendante de la pluviométrie, et il parait bien impératif de trouver d’autres types de pâturage pour réussir l’élevage en MB. L’objectif de cette étude était d’évaluer la qualité de la viande d’agneaux élevés sur deux types de pâturage: le parcours naturel et une prairie d’orge en vert. |
Tipo: Conference paper, poster, etc. |
Palavras-chave: Feeding and growth; Sheep and goats; Tunisia. |
Ano: 2012 |
URL: http://orgprints.org/35028/1/Effet%20du%20type%20de%20p%C3%A2turage%20sur%20la%20qualit%C3%A9%20de%20la%20viande%20des%20agneaux%20%C3%A9lev%C3%A9s%20en%20mode%20biologique.pdf |
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Paull, John. |
Organic production (including agriculture, wild culture, forestry and aquaculture) is a worldwide phenomenon that is practiced in at least 172 countries. The Organics Olympiad presents 14 indices of global organics leadership, each at three levels (Gold, Silver and Bronze). The Organics Olympiad of 2016 yields 29 countries as global organics leaders, and confirms that organics leadership is diversely distributed across countries, large and small, rich and poor, developed and less so, and cuts across linguistic, ethnic and cultural boundaries. Australia continues to lead the world in organic agriculture hectares. Australia also leads in the increase of organic hectares over the past four years (since the Organics Olympiad 2012) and in the number of WWOOF... |
Tipo: Journal paper |
Palavras-chave: Farming Systems; Food systems; Africa; Asia; Australia; China; Denmark; European Union; Finland; France; India; Italy; Latin America; Lithuania; Switzerland; Tunisia; United States; World; Knowledge management; Europe; Germany; Mexico. |
Ano: 2016 |
URL: http://orgprints.org/30369/1/Paull2016.OlympiadJSDS.pdf |
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Jaouadi, Imen. |
l'Istituto Mediterraneo di Certificazione (IMC) a organisé le 23 et 24 mars 2005 deux journées d'études et de sensibilisation en collaboration avec l'ONUDI (Organisation des Nations Unis pour le Développement Industriel) et le CTAA (Centre Technique de l'Agroalimentaire). Les thèmes choisis sont liés aux potentialités du marché agroalimentaire Tunisien vis-à-vis du marché européen et des marchés internationaux 23 e 24 marzo, a Tunisi due seminari sull' agricoltura biologica e la rintracciabilità nell'aziende agricole e agrolaimentari in collaborazione con l' UNIDO e il CTTA (Centre Technique de l'Agroalimentaire) dal titolo “Les produits agroalimentaires Biologiques et les marchés internationaux” e “La mise en place des systèmes de traçabilité dans... |
Tipo: Conference paper, poster, etc. |
Palavras-chave: Tunisia. |
Ano: 2005 |
URL: http://orgprints.org/4793/1/4793.pdf |
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Dhehibi, Boubaker; Lachaal, Lassaad; Chebil, Ali. |
The aim of this paper is to analyze and determine the factors influencing fish demand in Tunisia during the 1975-2000 period. A Box-Cox transformation is used to select the appropriate functional form between linear and double-log models. Results indicate that the double-log form fits better the data and is used for the empirical analysis. Calculated elasticities from static model show that fish demand is price-inelastic and that fish can be considered as a normal good. However, the dynamic analysis using Houthakker-Taylor model suggests that fish consumption in Tunisia depends on consumers psychological-buying habits. Finally, the values of the short and the long-run elasticities indicate that per capita consumption of fish in Tunisia is growing, but at a... |
Tipo: Conference Paper or Presentation |
Palavras-chave: Fish demand; Box-Cox transformation; Double-log model; Tunisia; Demand and Price Analysis; D12; C22. |
Ano: 2005 |
URL: http://purl.umn.edu/24715 |
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Chebbi, Houssem Eddine; Boujelbene, Y.. |
This short paper investigates the cointegration and causality link between energy consumption and agricultural, non-agricultural outputs (manufacturing sector and services sector) and overall gross domestic product in Tunisia for 1971-2003 period. Empirical results suggest that there is only unidirectional causality running from agricultural and non-agricultural sectors to energy consumption as well as from overall GDP growth to energy consumption. This unidirectional causality signifies a less energy dependent economy and suggests that it is sectoral growth that drives the energy consumption in Tunisia and not vice versa. Empirical results suggest also that Tunisian agricultural sector growth does not depend on energy, and high consumption of energy do... |
Tipo: Conference Paper or Presentation |
Palavras-chave: Energy consumption; Output growth; Causality; Cointegration; Tunisia; Resource /Energy Economics and Policy. |
Ano: 2008 |
URL: http://purl.umn.edu/44055 |
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Registros recuperados: 39 | |
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