Ontogenetic changes in habitat are driven by shifting life-history requirements and play an important role in population dynamics. However, large portions of the life history of many pelagic species are still poorly understood or unknown. We used a novel combination of stable isotope analysis of vertebral annuli, Bayesian mixing models, isoscapes and electronic tag data to reconstruct ontogenet...

The ability of individuals to actively control their movements, especially during the early life stages, can significantly influence the distribution of their population. Most marine turtle species develop oceanic foraging habitats during different life stages. However, flatback turtles (Natator depressus) are endemic to Australia and are the only marine turtle species with an exclusive neritic...

Micropaleontological analysis of sixty (62) ditch cuttings rock samples collected from interval, 7800 feet to 12,002 well AD, located offshore western Niger Delta was carried out for the investigation their age and paleodepositional environment. Standard methods techniques foraminiferal sample processing were followed disaggregate microfauna matrix. The studied interval is predominantly made up...

The functional signiŽ cance of frilled septa and complex sutures in ammonoids has generated ongoing debate. The ‘classic’ hypothesis envisages ammonoid shells and septa as designed for resisting ambient hydrostatic pressure, complex sutures being the evidence of strength in shells for colonization of deep habitats. Here we address the ‘suture problem’, focusing on the analysis and interpretatio...

The pelagic juvenile stage of sea turtles is poorly studied. We present a growth model and estimates for duration of the pelagic juvenile stage for loggerhead sea turtles Caretta caretta in the North Atlantic based on length-frequency analyses and sizes of young-of-the-year stranded in the Azores. The size-specific growth model is a monotonic, nonlinear, declining function. The growth model is ...

Biofacies and lithofacies analysis of one hundred ninety-two (192) ditch cutting rock samples from well x, onshore Niger Delta was carried out for the purpose paleoenvironmental reconstruction succession. The objectives were to identify units species foraminifera use both quantitave qualitative foraminiferal assemblage recognise benthonic biofacies integrate results delineation paleobathymetric...

An accoiMt of the past 50 years of research carried out on Amphipoda by the Central Marine Fisheries Research Institute and most relevant works carried out on the topic from the Indian seas are presented. The paper highlights the qualitative and quantitative composition, distribution in space and time and the taxonomy of planktonic :imphipods of neritic and oceanic waters of Indian region as we...