High Resolution Studies of the (p,Pi+) Reaction on 1p Shell Nuclei at E_p=200 MeV

Supported by the National Science Foundation and Indiana Universit

Measurement of Charged Pion Yields from Nuclei in the (p,Pi+) Reaction from 2-13 MeV above Threshold

This work was supported by National Science Foundation Grant PHY 76-84033 and Indiana Universit

Energy Dependence of Pion Production by Protons on Nuclei

This work was supported by National Science Foundation Grants PHY 76-84033A01, PHY 78-22774, and Indiana Universit

Proton Induced Pi- Production from 7-Li

This work was supported by the National Science Foundation Grant NSF PHY 81-14339 and by Indiana Universit

Positive-Pion Production by 149-166 MeV Protons on 16-O and 28-Si

Supported by the National Science Foundation and Indiana Universit

Continuum Pion Production

This research was sponsored by the National Science Foundation Grant NSF PHY 87-1440

Charged-Pion Production in Proton-Nucleus Collisions Near Threshold

This work was supported by National Science Foundation Grant PHY 76-84033 and Indiana Universit

Time-in-area represents foraging activity in a wide-ranging pelagic forager

Successful Marine Spatial Planning depends upon the identification of areas with high importance for particular species, ecosystems or processes. For seabirds, advancements in biologging devices have enabled us to identify these areas through the detailed study of at-sea behaviour. However, in many cases, only positional data are available and the presence of local biological productivity and hence seabird foraging behaviour is inferred from these data alone, under the untested assumption that foraging activity is more likely to occur in areas where seabirds spend more time. We fitted GPS devices and accelerometers to northern gannets Morus bassanus and categorised the behaviour of individuals outside the breeding colony as plunge diving, surface foraging, floating and flying. We then used the locations of foraging events to test the efficiency of 2 approaches: time-in-area and kernel density (KD) analyses, which are widely employed to detect highly-used areas and interpret foraging behaviour from positional data. For KD analyses, the smoothing parameter (h) was calculated using the ad hoc method (KDad hoc), and KDh=9.1, where h = 9.1 km, to designate core foraging areas from location data. A high proportion of foraging events occurred in core foraging areas designated using KDad hoc, KDh=9.1, and time-in-area. Our findings demonstrate that foraging activity occurs in areas where seabirds spend more time, and that both KD analysis and the time-in-area approach are equally efficient methods for this type of analysis. However, the time-in-area approach is advantageous in its simplicity, and in its ability to provide the shapes commonly used in planning. Therefore, the time-in-area approach can be used as a simple way of using seabirds to identify ecologically important locations from both tracking and survey data

Measurements of (p,pi ̄) Reactions Near Zero Degrees

This research was sponsored by the National Science Foundation Grant NSF PHY 87-1440