The feeding of anchovy, Engraulis encrasicolus (Linnaeus, 1758) was investigated for the first ti... more The feeding of anchovy, Engraulis encrasicolus (Linnaeus, 1758) was investigated for the first time in Moroccan Atlantic coast during the period between January 2016 and December 2016. Samples were collected onboard the commercial purse-seine fleet. A total of 234 specimens were collected monthly, with total lengths and weight ranging 6 to 16.5 cm and 1.24 to 58 g. The diet of E. encrasicolus was studied through qualitative and quantitative analysis of stomach contents. The vacuity index depending on the seasons shows that the most empty stomach were encountered during summer (56%) followed by winter (46%), spring (24%) and autumn (10%). According to the frequency of occurrence, there was a clear dominance of crustaceans for all seasons and for the whole sizes. Copepod was the preferential prey group which is dominated by calanidae, centropagidae and oncaeidae families while other taxa (e.g. mollusks, fish (eggs and scales) and echinoderms) had less importance in the diet of anchovy...
International Journal of Advanced Computer Science and Applications, 2019
There is no doubt that the hybrid approach is the best paradigm for designing effective multidime... more There is no doubt that the hybrid approach is the best paradigm for designing effective multidimensional schemas. Its strength lies in its ability to combine the top-down and bottom-up approaches, thus exploiting the advantages of both approaches. In this paper, the authors try to identify and analyze the different hybrid methods developed for building data warehouses. The analysis revealed that the existing methods are too complicated and time consuming in the deployment phase. In order to solve this problem, the authors introduced a new hybrid method that is easy to use and saves a huge amount of deployment time. This new method consists of two main steps: the first data driven step allows an analysis of the source models by using the X-ETL method and gives rise to star models. The second requirements driven step performs a semantic analysis of the needs expressed in natural language by using the XCube Assist method. This analysis allows to improve the quality of star models generated by the X-ETL method without the intervention of a designer.
Résumé Dans cette étude nous présentons une expérience de lutte contre les larves de diptères dan... more Résumé Dans cette étude nous présentons une expérience de lutte contre les larves de diptères dans les boues de la station d'épuration de Sana'a (Yémen) prétraitées sous les conditions climatiques de la zone d'étude par l'utilisation de sable. Pour ce premier essai ...
The feeding of anchovy, Engraulis encrasicolus (Linnaeus, 1758) was investigated for the first ti... more The feeding of anchovy, Engraulis encrasicolus (Linnaeus, 1758) was investigated for the first time in Moroccan Atlantic coast during the period between January 2016 and December 2016. Samples were collected onboard the commercial purse-seine fleet. A total of 234 specimens were collected monthly, with total lengths and weight ranging 6 to 16.5 cm and 1.24 to 58 g. The diet of E. encrasicolus was studied through qualitative and quantitative analysis of stomach contents. The vacuity index depending on the seasons shows that the most empty stomach were encountered during summer (56%) followed by winter (46%), spring (24%) and autumn (10%). According to the frequency of occurrence, there was a clear dominance of crustaceans for all seasons and for the whole sizes. Copepod was the preferential prey group which is dominated by calanidae, centropagidae and oncaeidae families while other taxa (e.g. mollusks, fish (eggs and scales) and echinoderms) had less importance in the diet of anchovy...
International Journal of Advanced Computer Science and Applications, 2019
There is no doubt that the hybrid approach is the best paradigm for designing effective multidime... more There is no doubt that the hybrid approach is the best paradigm for designing effective multidimensional schemas. Its strength lies in its ability to combine the top-down and bottom-up approaches, thus exploiting the advantages of both approaches. In this paper, the authors try to identify and analyze the different hybrid methods developed for building data warehouses. The analysis revealed that the existing methods are too complicated and time consuming in the deployment phase. In order to solve this problem, the authors introduced a new hybrid method that is easy to use and saves a huge amount of deployment time. This new method consists of two main steps: the first data driven step allows an analysis of the source models by using the X-ETL method and gives rise to star models. The second requirements driven step performs a semantic analysis of the needs expressed in natural language by using the XCube Assist method. This analysis allows to improve the quality of star models generated by the X-ETL method without the intervention of a designer.
Résumé Dans cette étude nous présentons une expérience de lutte contre les larves de diptères dan... more Résumé Dans cette étude nous présentons une expérience de lutte contre les larves de diptères dans les boues de la station d'épuration de Sana'a (Yémen) prétraitées sous les conditions climatiques de la zone d'étude par l'utilisation de sable. Pour ce premier essai ...
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