The feeding habits and effect of the diameter pelleted feeds on responses wild juvenile adult flathead grey mullet (Mugil cephalus) in captivity were examined. Optimal pellet size for was defined according to behavioural ingestion pellets with different diameters (2, 4, 6, 8 mm) that dropped into tank a random sequence. Larger (6 more attractive (lower reaction time, high percentage capture), b...

We explored rates and stoichiometry (C : N : P ratios) of sinking particles in a temperate reservoir during a 2-yr period. Plankton was sampled weekly, and a sediment trap placed below the metalimnion collected sinking particles. There were no significant relationships between the stoichiometry of entrapped material and seston or zooplankton stoichiometry. However the differences in the entrapp...

We studied urea decomposition in depth profiles at stations in the Southern California Bight. Urea decomposition was measured by adding I4C urea as a tracer. In situ urea concentration was measured by the urease method; we, therefore, studied the decomposition of only the urease-sensitive fraction of the urea pool. In the mesopelagic zone the decomposition of urea, which was mainly due to the b...

It has been recognized since the 1950's that radioisotopic disequilibrium between naturally occurring parentdaughter isotope pairs in seawater can provide information on the rate of processes segregating them. In the surface ocean, the U-238:Th-234 parent-daughter pair tends to display measurable disequilibrium that is attributable to the effects of scavenging on particle reactive thorium. A ra...

Deep ocean circulation may be a significant factor in determining climate. Here, we describe two long, fully coupled atmosphere-ocean simulations with the NCAR Climate System Model (CSM) for the late Cretaceous (80 Ma). Our results suggest that higher levels of atmospheric CO2 and the altered paleogeography of the late Cretaceous resulted in a surface ocean state temperature, salinity, and circ...