Spatio-temporal isotopic signatures (δ 13 C and δ 15 N) reveal that two sympatric West African mullet species do not feed on the same basal production sources - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Fish Biology Année : 2015

Spatio-temporal isotopic signatures (δ 13 C and δ 15 N) reveal that two sympatric West African mullet species do not feed on the same basal production sources

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Résumé

Potential trophic competition between two sympatric mullet species, Mugil cephalus and Mugil curema, was explored in the hypersaline estuary of the Saloum Delta (Senegal) using δ13C and δ15N composition of muscle tissues. Between species, δ15N compositions were similar, suggesting a similar trophic level, while the difference in δ13C compositions indicated that these species did not feed from exactly the same basal production sources or at least not in the same proportions. This result provides the first evidence of isotopic niche segregation between two limno-benthophageous species belonging to the geographically widespread, and often locally abundant, Mugilidae family.

Dates et versions

hal-01841208 , version 1 (17-07-2018)

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Citer

François Le Loc’h, J. D. Durand, K. Diop, J. Panfili. Spatio-temporal isotopic signatures (δ 13 C and δ 15 N) reveal that two sympatric West African mullet species do not feed on the same basal production sources. Journal of Fish Biology, 2015, 86 (4), pp.1444 - 1453. ⟨10.1111/jfb.12650⟩. ⟨hal-01841208⟩
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