Use of biological reference points for the conservation of atlantic salmon (Salmo salar L.)in the River Lune, North West England.

This paper deals with the development and use of biological reference points for salmon conservation on the River Lune, England. The Lune supports recreational and net fisheries with annual catches in the region of 1,000 and 1356 salmon respectively. Using models transported from other river systems, biological reference points exclusive to the Lune were developed; specifically the number of eggs deposited and carrying capacity estimates for age 0+ and 1+ parr. The conservation limit was estimated at 11.9 million eggs and between 1989 and 1998 was exceeded in two years. Comparison of juvenile salmon densities in 1991 and 1997 with estimates of carrying capacity indicated that 0+ and 1+ parr densities were at around 60 % of carrying capacity and may relate to the number of eggs deposited in 1990 and 1996 being approximately 70% of the target value. The paper discusses the management actions taken in order to ensure that the management target of the conservation limit being met four years out of five is delivered. It also discusses the balance between conservation and exploitation and the socio-economic decisions made in order to ensure parity of impacts on the rod and net fisheries. The regulations have been enforced since 1999 and the paper concludes with an assessment of the actions taken to deliver the management targets, over the last five years

Collisions of microdrops of water

AbstractIn this paper, collisions of microdrops of water were studied. Experimental studies of microdrops become very difficult as the drop dimensions become extremely small, particularly when the drops are so small that they contain only a few thousand molecules. To overcome these physical limitations, we produced a model for the H2O molecule using molecular and atomic interaction forces. We then placed these molecules together to produce drops. Hence, using this new technique, we could study drops with no lower size limitations.To study the motions of these drops, large systems of second order nonlinear ordinary differential equations had to be solved numerically. The system of equations were solved using a CRAY Y-MP8/864 computer. To observe the motion of the drops, output data was transferred to a SGI IRIS 4D-70/GT graphics computer which drew three-dimensional pictures of the data

Pepperdine University Lectureship Program -- For Such a Time as This (1971)

Program booklet for the 28th Annual Pepperdine Bible Lectures, held at Pepperdine University in Los Angeles, California, April 18-22, 1971. The Pepperdine Bible Lectures is an annual event hosted by Pepperdine University featuring a wide variety of lectures and classes on topics and themes in the Bible and Christianity. Syd Wyatt, Director of Lectureship Frank Pack, Chairman of Lectureship Committeehttps://digitalcommons.pepperdine.edu/churches/1055/thumbnail.jp