1Northeast Research Station
Our inability to directly measure the consumption rates of fish in the field generally precludes validation of models that relate foraging opportunity to growth and survival. In spite of this, population models implicate the importance of food and habitat availability in determining growth and survi...
| Main Authors: | , , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.598.2074 http://www-heb.pac.dfo-mpo.gc.ca/congress/2000/Papers/variationpdf/kennedybrian.pdf |
| Summary: | Our inability to directly measure the consumption rates of fish in the field generally precludes validation of models that relate foraging opportunity to growth and survival. In spite of this, population models implicate the importance of food and habitat availability in determining growth and survival for many juvenile fish (Elliott 1989, Nislow et al. 1999). Consumption and growth rates of stream-dwelling sa monids are frequently modeled as a function of prey abundance and hydrologic conditions (Hughes and Dill 1990, Hill and Grossman 1993). In the case of juvenile Atlantic salmon, spatially-explicit bioenergetic models implicate the importance of early-season foraging habitat for salmon fry growth and survival (Nislow et al. 2000). However, exactly how these factors interact to determine prey consumption, growth and survival under a range of habitat conditions is often complex and difficult to ascertain without reliable field-based techniques for measuring consumption rates. Building upon earlier models of radiocaesium accumulation in fish (Forseth et al. 1992, Rowan and Rasmussen 1996), the goal of this study was to use the turnover of naturally |
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