| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Composition et variations spatio-temporelles du régime alimentaire de Trachurus trachurus (Carangidae) de la côte atlantique marocaine
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| Autores: |
Wahbi, Fatima
Le Loc'H, Francois
Berreho, Amina
Benazzouz, Aissa
Ben Mhmed, Abdelouahed
Errhif, Ahmed
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| Data: |
2015-06
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| Ano: |
2015
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| Palavras-chave: |
Carangidae
Trachurus trachurus
Atlantic
Morocco
Diet
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| Resumo: |
A study of the diet of the Atlantic horse mackerel Trachurus trachurus (Linnaeus, 1758) was carried out on the Atlantic coast of Southern Morocco, located from Cap Boujdour to Cap Blanc (26 degrees 30'N-21 degrees N latitude). This area is characterized by a permanent upwelling and is among the highly productive ecosystems of the worldwide ocean. The diet of T. trachurus was studied through qualitative and quantitative analysis of stomach contents. Samples were collected during the warm (June-July-August) and the cold seasons (November-December) in 2007 and 2008. Acoustic surveys were carried out on board of the Moroccan Amir Moulay Abdellah and the Russian Atlantida oceanographic vessels. A total of 456 stomachs were analyzed, exhibiting a diversified food spectrum. According to the results of the index of relative importance (%IRI), which takes into account weight, number and frequency of occurrence, the pelagic crustaceans (%IRI = 80.15%), mainly Copepoda, are considered the preferential prey for T. trachurus. Molluscs (%IRI = 16.76%) are secondary prey and fishes (%IRI = 2.91%) are complementary prey while Siphonophora, Chaetognatha, Appendicularian and Annelids polycheata are accidental prey (%IRI < 1%). A Principal Component Analysis combined with a permutation test highlighted a significant difference in diet according to the sampling periods. A MANOVA test applied to the survey periods, the latitudinal position of the stations, the depth of trawling and size of individuals highlighted the determinant factors of this variation. It appears that T. trachurus exhibits significant diet variability with high thresholds for season and space factors.
Le régime alimentaire du chinchard d’Europe, Trachurus trachurus (Linnaeus, 1758), a été étudié au sud de la côte Atlantique marocaine, entre cap Blanc et cap Boujdour (21°00’N-26°30’N). L’échantillonnage a été réalisé durant les saisons chaude (juin-juillet-août) et froide (novembre-décembre) en 2007 et 2008. L’analyse du contenu stomacal de 456 individus a montré que le régime alimentaire de T. trachurus est diversifié, composé essentiellement de crustacés pélagiques qui représentent ses proies préférentielles. Une analyse en composante principale normée, associée à un test de permutations, a mis en évidence une variation du régime alimentaire en fonction des périodes d’échantillonnage. Une analyse de variance multiple (MANOVA) appliquée sur la période des campagnes, la position latitudinale des stations, la profondeur de chalutage et la taille des individus a permis de mettre en exergue les déterminants de cette variation. Il en ressort que T. trachurus présente une variabilité significative du régime alimentaire avec des seuils élevés pour les facteurs saison et espace.
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| Tipo: |
Text
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| Idioma: |
Francês
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| Identificador: |
https://archimer.ifremer.fr/doc/00275/38652/73175.pdf
DOI:10.26028/cybium/2015-392-004
https://archimer.ifremer.fr/doc/00275/38652/
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| Editor: |
Soc Francaise D Ichtyologie
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| Formato: |
application/pdf
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| Fonte: |
Cybium (0399-0974) (Soc Francaise D Ichtyologie), 2015-06 , Vol. 39 , N. 2 , P. 131-142
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| Direitos: |
info:eu-repo/semantics/openAccess
restricted use
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