Crisp, P. A. and Ottaway, E.M. (1981) Comparison of observed and predicted dates of eyeing, hatching and swim-up for brown trout and Atlantic salmon. Ambleside, UK, Freshwater Biological Association, 21pp. (WIT/73/4).
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Scholars recently derived simple models from published data for the prediction from water temperature of hatching times for the eggs of brown trout (Salmo trutta L.) and Atlantic salmon (Salmo salar L.). A similar model to predict eyeing time for salmon eggs was obtained and used in this study, largely by analogy, to develop equations which might be used to obtain very approximate estimates of eyeing and swim-up times for salmon and brown trout. As the models were based on data for constant temperatures and some of them also had a very inadequate data base, it was desirable that they should be tested, as far as possible, against field and hatchery observations. The present report is a brief summary based on such data as have been obtained to date. None of the data sets were ideal for the purpose and the various inadequacies are discussed later in this report.
|Item Type:||Monograph or Serial issue|
|Title:||Comparison of observed and predicted dates of eyeing, hatching and swim-up for brown trout and Atlantic salmon|
|Number of Pages:||21|
|Publisher:||Freshwater Biological Association|
|Place of Publication:||Ambleside, UK|
|Issuing Agency:||Freshwater Biological Association|
|Uncontrolled Keywords:||Freshwater ecology; Rivers; Freshwater fish; Fish eggs; Hatching; Temperature data; England, Teesdale|
|Depositing User:||Hardy B Schwamm|
|Date Deposited:||21 Apr 2011 19:30|
|Last Modified:||29 Sep 2011 15:25|
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