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3. Feeding mechanism and capture success of european whitefish (Coregonus lavaretus L.) larvae

Author

Mahjoub M.-S., Anneville O., Molinero J. C., Souissi S., and Hwang J.-S.

Subjects
feeding mechanism, capture success, behavior, fractal dimension, Coregonuslavaretus larvae, Aquaculture. Fisheries. Angling, SH1-691
Abstract

Feeding success is a key factor for larval growth and survival, and is highly dependent on small-scale processes which occur during the predator-prey interaction. We studied the feeding mechanisms involved in the capture success of the European whitefish (Coregonus lavaretus) larvae using video recordings. The successful predatory sequence of this species consists of the following 5 events: encounter, pursuit (including fixation), strike, capture and ingestion. C. lavaretus larvae can exhibit an “S” shaped posture and always strikes on its prey from beyond. The mean fixation distance for wild larvae was 1.75 ± 0.71 mm and for reared larvae was 1.65 ± 0.76 mm. This distance was significantly different between failed and successful snaps, and seemed to be an important parameter to the capture success of C. lavaretus larvae. The analysis of the complexity in predator’s swimming path showed that more convoluted approaches are less likely to lead to a fruitful attack.

Published
2008
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8. Liste des collaborateurs

Author

Amar, M., primary, Arnaud-Beauchamp, N., additional, Baron, S., additional, Beloncle, M., additional, Beltran, L., additional, Blachère, P., additional, Bonierbale, M., additional, Bouchot, O., additional, Bourin, M., additional, Brenot, P., additional, Buvat, J., additional, Cabanis, C., additional, Chansigau, J.-P., additional, Chevret-Measson, M., additional, Chollier, M., additional, Clément, R., additional, Colombel, A., additional, Colson, M.-H., additional, Costa, P., additional, Cudicio, P., additional, Cuzin, B., additional, Deneux, A., additional, Dessaux, N., additional, Dintrans, J.-R., additional, Durand, G., additional, Durandeau, A., additional, Ferroul, Y., additional, Garnier, G., additional, Gorans, D., additional, Grafeille, N., additional, Hedon, F., additional, Huyghe, E., additional, Jarnoux, M., additional, Jarrousse, N., additional, Jean, M., additional, Labat, J.-J., additional, Lachowsky, M., additional, Le Fort, M., additional, Lopès, P., additional, Mahjoub, M. Mahbouli, additional, Maïza, D., additional, Martino, J., additional, Mignot, J., additional, Mimoun, S., additional, Lemine, C. Mohamed, additional, Paget, C., additional, Peyranne, J., additional, Plais, Y., additional, Potentier, M., additional, Poudat, F.-X., additional, Rodat, O., additional, Rollet, J., additional, Soulier, B., additional, Sztalryd, J.-M., additional, Trémollières, F., additional, Wagner, L., additional, and Wunsch, S., additional

Published
2021
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13. Facteurs prédictifs de mortalité des diabétiques hospitalisés pour COVID-19

Author

Chelly, S., primary, Mtira, A., additional, Ammar, A., additional, Ezzi, O., additional, Sghaeir, Z., additional, Ghezal, M.A., additional, Omri, N., additional, Fathallah, I., additional, Mabrouk, R., additional, Ben Slimen, D., additional, Mjendel, I., additional, Rouiss, M., additional, Ferchichi, I., additional, Njah, M., additional, and Mahjoub, M., additional

Published
2023
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14. Discovery of dual-target natural antimalarial agents against DHODH and PMT of Plasmodium falciparum: pharmacophore modelling, molecular docking, quantum mechanics, and molecular dynamics simulations

Author

Elamin, E.M., primary, Eshage, S.E., additional, Mohmmode, S.M., additional, Mukhtar, R.M., additional, Mahjoub, M., additional, Sadelin, E., additional, Shoaib, T.H., additional, Edris, A., additional, Elshamly, E.M., additional, Makki, A.A., additional, Ashour, A., additional, Sherif, A.E., additional, Osman, W., additional, Ibrahim, S.R.M., additional, Mohamed, G.A., additional, and Alzain, A.A., additional

Published
2023
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21. Diabétiques avec COVID-19 admis à l’hôpital régional de Msaken au centre de la Tunisie

Author

Mtira, A., primary, Chelly, S., additional, Ghezal, M.A., additional, Sghaier, Z., additional, Rhimi, S., additional, Omri, N., additional, Ezzi, O., additional, Ammar, A., additional, Wadiaa, B., additional, Hleli, R., additional, Mjendel, I., additional, Ben Slimen, D., additional, Rouiss, M., additional, Ferchichi, I., additional, Njah, M., additional, and Mahjoub, M., additional

Published
2023
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22. Facteurs de morbi-mortalité chez les diabétiques hospitalisés pour COVID-19 : une étude de cohorte de la population de Msaken-Sousse

Author

Mtira, A., primary, Chelly, S., additional, Ghezal, M.A., additional, Sghaier, Z., additional, Rhimi, S., additional, Omri, N., additional, Ezzi, O., additional, Ammar, A., additional, Bannour, W., additional, Hleli, R., additional, Mjendel, I., additional, Ben Slimen, D., additional, Rouiss, M., additional, Ferchichi, I., additional, Njah, M., additional, and Mahjoub, M., additional

Published
2023
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40. Quantification of mitral papillary muscle function using speckle tracking echocardiography in apparently healthy population

Author

Kallala, MY, primary, Bouchahda, N, additional, Bettaieb, SK, additional, Mechri, N, additional, Lamine, S, additional, Hmidi, M, additional, Memmi, K, additional, Bnouni, A, additional, Hassan, H, additional, Boussaada, M, additional, B Messaoud, M, additional, Hassine, M, additional, Mahjoub, M, additional, and Gamra, H, additional

Published
2022
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43. Effets de certains fongicides de synthèse et biologiques sur la croissance mycélienne et l'agressivité de Fusarium oxysporum f.sp. radicis-lycopersici

Author

Daami-Remadi, M., Hibar, K., and El Mahjoub, M.

Subjects
Fusarium, Tomato, Chemical control, Biological control, Inhibition, Disease incidence, Tunisia, Agriculture
Abstract

Effect of some Chemical and Biological Fungicides on Mycelial Growth and Disease Severity of Fusarium oxysporum f.sp. radicis-lycopersici. Fusarium is among the most aggressive telluric fungi causing wilt and root rots in several vegetable crops. A new disease caused by Fusarium oxysporum f. sp. radicis-lycopersici was recorded in southern Tunisia in the "Cinquième Saison" farm, situated in Hammet Gabès during 2000-2001 crop season. It caused death of up to 90% of tomato plants in some greenhouses. In the present research, the effect of 3 chemical and 4 biological fungicides was tested in vitro on mycelial growth and in vivo on disease severity of F. oxysporum f. sp. radicis-lycopersici. Hymexazol, benomyl and manebe were used as chemical fungicides whereas four biological products, i.e. two based on Trichoderma harzianum, one on Bacillus subtilis and another one on Bacillus thuringiensis were also tested. Among the chemical fungicides which were used, hymexazol and benomyl were the most effective in vitro and inhibited mycelial growth up to 80%. However, in vivo assays showed that only hymexazol was effective with a reduction in disease incidence of about 76%. In vitro, the product based on B. thuringiensis entailed a mycelial growth inhibition of less than 20%. This value is more than 75% higher than what was obtained through the other biological fungicides based on either T. harzianum or in B. subtilis. The efficacy of the latter 2 biological fungicides was more important in vivo assays using inoculated tomato plants. Indeed, by the use of the product based on B. subtilis, the reduction of disease incidence exceeded 95%. These results show that some biological fungicides can be used in controlling Fusarium crown and root rot of tomato.

Published
2007

44. Effet des extraits de compost sur la croissance mycélienne et l'agressivité du Fusarium oxysporum f. sp. radicis-lycopersici

Author

El Mahjoub M., El Akram Znaïdi I., Jabnoun-Khiareddine H., Daami-Remadi M., and Hibar K.

Subjects
Manure, henʼs dung, biological control, inhibition, disease incidence, Biotechnology, TP248.13-248.65, Environmental sciences, GE1-350
Abstract

Effect of compost tea on mycelial growth and disease severity of Fusarium oxysporum f. sp. radicis-lycopersici. Simultaneous addition, on culture media, of Fusarium oxysporum f. sp. radicis-lycopersici and compost teas revealed that the latest induced the inhibition of the mycelial growth of the pathogen. This inhibition, noted after an incubation period of about six days at 25°C, was more important when compost teas were enriched in PDB (Potato Dextrose Broth), where it may reach 70% compared to the control. Transplantation of tomato seedlings, previously inoculated by a conidial suspension of F. oxysporum f. sp. radicis-lycopersici, in a container media (peat, perlite or the mixture of the two substrates) treated by compost teas has signifi cantly reduced Fusarium crown and root rot incidence compared to inoculated and untreated control seedlings. Disease incidence is more reduced when tomato inoculated plants are transplanted in peat treated by compost teas; indeed, these plants donʼt show any wilting and present a vigorous root system and a better vegetative growth.

Published
2006

46. Effet inhibiteur in vitro et in vivo du Trichoderma harzianum sur Fusarium oxysporum f. sp. Radicis-lycopersici

Author

El Mahjoub M., Khiareddine H., Daami-Remadi M., and Hibar K.,

Subjects
Fusarium, Lycopersicon esculentum, collet, lysis, inoculation, Trichoderma, Biotechnology, TP248.13-248.65, Environmental sciences, GE1-350
Abstract

In vitro and in vivo antagonistic effect of Trichoderma harzianum against Fusarium oxysporum f. sp. radicis-lycopersici. Tests of direct confrontation, on PDA medium or remote confrontation, between Fusarium oxysporum f. sp. radicislycopersici and Trichoderma harzianum, revealed that the latest has inhibited mycelial growth of the pathogen by more than 65% compared to the control and this after an incubation period of about four days at 25°C. Moreover, beyond this period and after six days, T. harzianum invades and also sporulates on F. oxysporum f. sp. radicis-lycopersici colonies revealing its high myco-parasitism. Some interesting results have also been obtained in vivo: indeed, transplantation of tomato seedlings in a mixture of perlite inoculated by F. oxysporum f. sp. radicis-lycopersici and T. harzianum reduced Fusarium crown and root rot incidence compared to seedlings planted in perlite only inoculated by the pathogen. Even better, seedlings planted in perlite containing the pathogen and the studied antagonist present a better vegetative growth and a vigorous root system compared to those of the healthy control (not inoculated and untreated).

Published
2005

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