مقالات اکولوژی

Inter-annual variability in trophic patterns of jumbo squid (Dosidicus gigas) off the exclusive economic zone of Peru, implications from stable isotope values in gladius
Fisheries Research (2017)
Yunkai Li, Yi Gong, Yuying Zhang, Xinjun Chen
The jumbo squid Dosidicus gigas plays an important role in marine food webs in the eastern Pacific Ocean, as not only a voracious predator but also a valuable prey source. In this study, the proostracum (a morphological part of the gladius) from 45 samples were selected over three years and were serially sampled based on growth information obtained from the statolith. The δ13C and δ15N values along the proostracum were used to reconstruct the feeding variations of D. gigas and to evaluate the potential effects of 2009–10 El Niño event on the variability of their trophic patterns. The results show a strong variation in δ13C and δ15N values along the proostracum for all the squid; changes that could be determined by temporal variation of foraging as well as migration among regions with distinct baselines. An El Niño event could decrease the variation of trophic patterns of squid through compressing the space and time for foraging and migration. These results support our general hypothesis that a time-based consecutive sampling of the gladius can back-calculate an ontogenetic shift and the possible migration patterns of squids more precisely and comprehensively and suggest that the isotopic values of D.gigas might be influenced much more by their migration behavior.
Impact of food type on respiration, fractionation and turnover of carbon and nitrogen stable isotopes in the marine amphipod Gammarus aequicauda (Martynov, 1931)
Journal of Experimental Marine Biology and Ecology (2017)
Resource partitioning in gurnard species using trophic analyses: The importance of temporal resolution
Fisheries Research (2017)
Burrowing and foraging activity of marsh crabs under different inundation regimes
Journal of Experimental Marine Biology and Ecology (2017)

اطلاعات تماس

اراک - میدان بسیج - بلوار کربلا - دانشگاه اراک - آزمایشگاه مرکزی- مرکز تحقیقات ایزوتوپهای پایدار

Email: a-sirl@araku.ac.ir

تلفن : ۳۲۶۲۲۸۲۲ ۰۸۶ - ۳۲۶۲۲۸۲۰ ۰۸۶

امکانات

آزمایشگاه تحقیقاتی ایزوتوپهای پایدار شامل یک آزمایشگاه دستگاهی، یک آزمایشگاه آماده سازی نمونه و یک انبار نگهداری نمونه ها می باشد.

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