%0 Journal Article
%T Food preference of the giant mudskipper Periophthalmodon schlosseri (Teleostei : Gobiidae) Pr¨¦f¨¦rences alimentaires du p¨¦riophthalme g¨¦ant Periophthalmodon schlosseri (Teleostei : Gobiidae)
%A Zulkifli S.Z.
%A Mohamat-Yusuff F.
%A Ismail A.
%A Miyazaki N.
%J Knowledge and Management of Aquatic Ecosystems
%D 2012
%I EDP Sciences
%R 10.1051/kmae/2012013
%X The giant mudskipper (Periophthalmodon schlosseri) is one of the commonly found mudskipper species living and it makes a significant biomass value in the mangrove ecosystem. Samples of this mudskipper species were collected and analysed for stomach content and stable isotope ratios (¦Ä13C and ¦Ä15N) to determine their food preference. The stomach content analysis showed four groups of food items: fiddler crabs (Uca sp.), medaka fish (Oryzias sp.), juveniles of indeterminate fish species and indeterminate remains of prey items. P. schlosseri females prefer to prey on Oryzias sp. (57.8%), Uca sp. (26.7%) and juveniles of indeterminate fish species (6.7%), while the males prefer to prey on Uca sp. (84.6%) and Oryzias sp. (7.7%). The indeterminate remaining prey items were 8.9% and 7.7% for respective sexes. The stable isotope analysis showed Uca sp. and Oryzias sp. being the main food items for P. schlosseri. The values of ¦Ä13C and ¦Ä15N ratios also showed differences in food preference among sexes, where females of all life stages prefer to prey more on Oryzias sp. and little Uca sp. In contrast, the male P. schlosseri prefer to prey only on Uca sp. throughout their life, with the exception of juvenile male P. schlosseri, which suggested they also consume a small amount of Oryzias sp. Behavioural differences among the sexes and life stages were suggested to cause differences in food selection. The size of the food items also influences food preference. Le p¨¦riophthalme g¨¦ant (Periophthalmodon schlosseri) est l¡¯une des esp¨¨ces de p¨¦riophthalme couramment rencontr¨¦e et il repr¨¦sente une importante biomasse dans l¡¯¨¦cosyst¨¨me de la mangrove. Des ¨¦chantillons de cette esp¨¨ce ont ¨¦t¨¦ r¨¦colt¨¦s et analys¨¦s pour leur contenu stomacal et les rapports des isotopes stables (¦Ä13C et ¦Ä15N) afin de d¨¦terminer leur pr¨¦f¨¦rence alimentaire. L¡¯analyse du contenu stomacal a montr¨¦ quatre groupes de ressources alimentaires : crabes violonistes (Uca sp.), poissons m¨¦daka (Oryzias sp.), juv¨¦niles d¡¯esp¨¨ces de poissons non identifi¨¦es et des restes ind¨¦termin¨¦s de proies. Les femelles de P. schlosseri pr¨¦f¨¨rent comme proies Oryzias sp. (57,8 %), Uca sp. (26,7 %) et des juv¨¦niles d¡¯esp¨¨ces de poissons non identifi¨¦es (6,7 %), tandis que les males pr¨¦f¨¨rent Uca sp. (84,6 %) et Oryzias sp. (7,7 %). Les proies restantes ind¨¦termin¨¦es ont ¨¦t¨¦ de 8,9 % et 7,7 % pour les deux sexes respectivement. L¡¯analyse des isotopes stables a montr¨¦ que Uca sp. et Oryzias sp. ¨¦taient les principales ressources alimentaires pour P. schlosseri. Les valeurs de ¦Ä13C et ¦Ä15N ont ¨¦galement montr¨¦ des diff¨¦r
%K P. schlosseri
%K stomach content analysis
%K stable isotope analysis
%K ¦Ä13C and¦Ä15N ratios
%K food preference
%K P. schlosseri
%K analyse des contenus stomacaux
%K analyse des isotopes stables
%K ¦Ä13C et¦Ä15N
%K pr¨¦f¨¦rence alimentaire
%U dx.doi.org/10.1051/kmae/2012013