Host-dependent differences in resource use associated with Anilocra spp. parasitism in two coral reef fishes, as revealed by stable carbon and nitrogen isotope analyses

摘要: The role of parasites in trophic ecology is poorly understood marine ecosystems. Stable isotope analyses (SIA) have been widely used studies ecology, but rarely applied to study the parasites. Considering that some are associated with altered host foraging patterns, SIA can help elucidate whether parasitism influences interactions. French grunt (Haemulon flavolineatum), an abundant Caribbean coral reef fish, contributes greatly connectivity. They typically depart at dusk, feed overnight seagrass beds, and return dawn. large parasitic isopod Anilocra haemuli commonly infects grunt, infected fish less likely complete their diel migration, poorer condition than uninfected conspecifics. Brown chromis (Chromis multilineata) diurnally feeding planktivores infection by does not influence condition. To determine if diet locality, we conducted stable carbon nitrogen on scale, muscle, heart gill tissues brown chromis. We determined all had δ13C values representative habitats, were significantly enriched 13C 15N compared This suggests conspecifics, forage seagrass, isotopically prey, and/or condition, which elevate δ15N values. For chromis, did any values; hence they foraged same environment similar prey. first use examine differences resource fishes evaluate how closely related might host-dependent effects ecology.