Search Results - "Fryer, R J"

Development of spatial regression models for predicting summer river temperatures from landscape characteristics: Implications for land and fisheries management by Jackson, F.L., Hannah, David M., Fryer, R.J., Millar, C.P., Malcolm, I.A.

“…There is increasing demand for models that can accurately predict river temperature at the large spatial scales appropriate to river management. This paper…”
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Can Conservation Stocking Enhance Juvenile Emigrant Production in Wild Atlantic Salmon? by Bacon, P. J, Malcolm, I. A, Fryer, R. J, Glover, R. S, Millar, C. P, Youngson, A. F

“…Conservation stocking is frequently used by fishery managers to stabilize or increase production of depleted fish stocks. However, in the case of salmonids the…”
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A short-term economic assessment of incentivised selective gears by O’Neill, F.G., Lines, E.K., Kynoch, R.J., Fryer, R.J., Maguire, S.

“…An economic analysis of the impact of introducing more selective fishing gears and how their uptake is incentivised is carried out. The study focusses on some…”
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Separation of fish from Nephrops norvegicus into a two-tier cod-end using a selection grid by Graham, N., Fryer, R.J.

“…The legally sized fish by-catch is an important economic component of many Nephrops fisheries. However, the small mesh size typically used by Nephrops trawlers…”
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Estimating common trends in multivariate time series using dynamic factor analysis by Zuur, A. F., Fryer, R. J., Jolliffe, I. T., Dekker, R., Beukema, J. J.

“…This article discusses dynamic factor analysis, a technique for estimating common trends in multivariate time series. Unlike more common time series techniques…”
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Square mesh panels in North Sea demersal trawls: Separate estimates of panel and cod-end selectivity by O’Neill, F.G., Kynoch, R.J., Fryer, R.J.

“…We report on trials to compare the selectivity of a trawl with no square mesh panel and trawls with a 90 mm square mesh panel inserted 3–6, 6–9 and 9–12 m from…”
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Effects of individual variation in length, condition and run‐time on return rates of wild‐reared Atlantic salmon Salmo salar smolts by Armstrong, J. D., McKelvey, S., Smith, G. W., Rycroft, P., Fryer, R. J.

“…Groups of wild‐reared Atlantic salmon Salmo salar smolts were captured during their seaward migration on a tributary of the River Conon, Scotland, U.K., from…”
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Square mesh panels in demersal trawls: further data relating haddock and whiting selectivity to panel position by Graham, N., Kynoch, R.J., Fryer, R.J.

“…Twin-trawl experiments were conducted to assess how the position of a 90 mm square mesh panel affects haddock and whiting selectivity. The panel was 3 m long…”
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A New, Improved Growth Model for Brown Trout, Salmo trutta by Elliott, J. M., Hurley, M. A., Fryer, R. J.

“…1. A growth model for brown trout, developed almost 20 years ago, has been used to investigate growth potential in at least 40 populations over a wide…”
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A simple technical measure to reduce bycatch and discard of skates and sharks in mixed-species bottom-trawl fisheries by Kynoch, R J, Fryer, R J, Neat, F C

“…Abstract Due to global declines, skates and sharks have become a focus of marine conservation in recent years. Despite protective measures, they remain…”
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Selectivity of a 120 mm diamond cod-end and the effect of inserting a rigid grid or a square mesh panel by Graham, N, O’Neill, F.G, Fryer, R.J, Galbraith, R.D, Myklebust, A

“…The selection of North Sea haddock, saithe and cod is evaluated using the twin trawl technique for: (i) a 120 mm diamond mesh cod-end (standard cod-end); (ii)…”
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The effect of varying cod-end circumference, inserting a ‘flexi-grid’ or inserting a Bacoma type panel on the selectivity of North Sea haddock and saithe by O’Neill, F.G., Graham, N., Kynoch, R.J., Ferro, R.S.T., Kunzlik, P.A., Fryer, R.J.

“…A comprehensive set of experiments using the twin trawl technique were conducted in the North Sea to assess the selectivity of haddock ( Melanogrammus…”
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Experimental method for quantifying resistance to the opening of netting panels by Sala, A., O'Neill, F. G., Buglioni, G., Lucchetti, A., Palumbo, V., Fryer, R. J.

“…Sala, A., O'Neill, F. G., Buglioni, G., Lucchetti, A., Palumbo, V., and Fryer, R. J. 2007. Experimental method for quantifying resistance to the opening of…”
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Illumination and diel variation modify fish passage through an inclined grid by O’Neill, FG, Summerbell, K., Edridge, A., Fryer, RJ

“…Fishing trials were carried out with a demersal trawl fitted with an inclined grid in the extension. Fibre optic cables were attached to the grid allowing the…”
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The relationship between Pseudo-nitzschia (Peragallo) and domoic acid in Scottish shellfish by Bresnan, E., Fryer, R.J., Fraser, S., Smith, N., Stobo, L., Brown, N., Turrell, E.

“…The diatom genus Pseudo-nitzschia (Peragallo) associated with the production of domoic acid (DA), the toxin reposnsible for amnesic shellfish poisoning, is…”
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Understanding the effects of river regulation on Atlantic salmon fry: The importance of channel morphology by Millidine, K.J., Fryer, R.J., Malcolm, I.A.

“…River regulation influences hydrological regime, channel hydraulics, and habitat quality for freshwater biota. Environmental flow assessments typically require…”
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Relationship between sea lice levels on sea trout and fish farm activity in western Scotland by Middlemas, S. J., Fryer, R. J., Tulett, D., Armstrong, J. D.

“…The relationship between aquaculture and infestations of sea lice on sea trout, Salmo trutta L., is controversial. Here, the association between sea lice…”
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Do trends in the size of wild female Atlantic salmon have a substantial effect on egg deposition? by Glover, R. S., Fryer, R. J., Bacon, P. J., Soulsby, C., Malcolm, I. A.

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Assessing the transferability of hydraulic habitat models for juvenile Atlantic salmon by Millidine, K.J., Malcolm, I.A., Fryer, R.J.

“…Hydraulic habitat models are logistically and technically challenging and expensive to produce. They are therefore frequently transferred between rivers, often…”
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Using smoothers for comprehensive assessments of contaminant time series in marine biota by Fryer, R. J., Nicholson, M. D.

“…It is shown how locally weighted regression smoothers can be used in comprehensive assessments of contaminant time series in marine biota. The smoothers are…”
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