A fisheries management plan for the River Tweed in the Scottish Borders

The River Tweed is, in rod-catch terms, the second most important river in Britain for Atlantic salmon, with an annual rod catch of ca.10,000 fish. This article gives an outline of the second edition of the Tweed Fisheries Management Plan, which is defined as "The co-ordination of data collection and analyses with fundamental research into relevant topics to devise management actions that will beneficially affect the future state of fish stocks". Much of the work set down for the present is concerned with setting up recording and measuring systems for fish catches and exploitation rates, and for the operation of monitoring sites for juvenile densities and adult trout and salmon spawning runs. While surveys show the present state of affairs, the collection of records and regular monitoring of sites will mean that in the future, the past will be better known through a longer series of records. Two case histories are described. The first is concerned with setting aims for managing the brown trout of the Tweed and defining the present state of the fishery. The second is an investigation into the spring salmon of the Tweed

A comparative study of the parasite of certain salientia from Pocahontas State Park, Virginia

Four species of salientia representing three selected habitats were collected from May 5th through October 4th, 1966 and examined for parasites. Of the 116 host specimens, 30 were Rana catesbeiana Shaw; 29 clamitans Latreille; 29 Bufo fowleri Hinckley; 28 Hyla versi­color (Le Conte). A total of 34 species of parasites was recovered: Protozoa, 10; Trematoda, 9 ; Cestoda, 2; Nematoda, 11; Acanthocephala, 1; and Acarina, 1. Although a relatively small number of hosts was examined , the results generally agree with those found in more extensive investigations of similar type. The aquatic hosts, R. catesbeiana and R. clamitans, harbored the greatest number of parasitic species. Infections of the terrestrial hosts, B. fowleri and H. versicolor, were fewer in number of species but significantly higher in number of specimens. Of the four representative hosts examined, the arboreal host, H. versicolor, showed fewer incidences of infection and harbored the least number of parasitic species

A Computerized Method of Precipitation Data Quality Control

A computerized data quality check and data edit program has been developed to aid in the processing of telemetered precipitation data. The logic considerations and program development are discussed and results are displayed. This effort has resulted in successful editing of large amounts of precipitation data gathered by automated remote data acquisition techniques. The application of this processing routine has resulted in reducing data editing costs to about three percent of that required to do the work manually

Product Development Processes, Three Vectors Of Improvement

Improving product development processes along three key vectors leads to greatly improved business performance.Product Development Processes have achieved a state of some maturity in recent years, but have focused primarily on structuring technical activities from the initiation of development to launch. We advocate major advances on three fronts; first, implementing an end-to-end process from the front end through field operations, second, integrating business considerations much better into the end-to-end process, and third, incorporating a performance improvement closed loop into the process. We call the resulting process a Product Development Business Process. Three initial applications are summarized.Center for Innovation in Product Developmen

A list of the mammals indigenous to Tasmania

The following list of the indigenous Mammals of Tasmania is as complete as the very limited means of reference at my command admits. I believe, however, it will be found to be nearly correct. Where deemed necessary I have added a few remarks, but will enter more fully into their habits in a subsequent paper

Architecting and Innovating

Innovating is essential to sustained industrial growth and profitability. But experience amply demonstrates how difficult innovation is, especially for large companies. The synthesis of valued offerings by aligning customer needs with technology possibilities lies at the heart of innovation. System architects working at the strategic level are ideally positioned, as a consequence of their experience and training, to play a key and even a leadership role in enabling, energizing, and leading this synthesis. The scope of the architecting effort must include the process architecture of the entire value chain as well as the more conventional product architecture to address all potential wellsprings of innovation. This paper outlines an architecture-centric approach to innovation, based on the concept of the system platform architecture.Center for Innovation in Product Development, MI

On the encroachments of the sea along the north coast of Tasmania

A communication of mine, "On the encroachments of the sea at Circular Head and along the north coast of Tasmania", was read at a meeting of the Royal Society at Hobart Town on 17th December, 1851. This short paper was the result of observations made during an excursion along the coast from Circular Head to Launceston, in October 1851. I have now to add to the remarks I then made, that in October of this year I had occasion to ride from Circular Head to Woolnorth, the extreme north-western point of Van Diemen's Land, and I observed that throughout that line of coast the sea is steadily advancing and gaining upon the land

Echinobothrium-Megacanthum Sp. N. (Cestoda, Diphyllidea) from the Eagle Rap Myliobatis-Goodei (Chondrichthyes, Rajoidei) from the Patagonian Shelf of Argentina

Fil: Ivanov, Verónica. Centro de Estudios en Parasitología y Vectores (CEPAVE). Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Campbell, Ronald A.. Department of Biology. University of Massachusetts Dartmouth. Massachusetts; US