Crisp, D.T. and Robson, S. (1985) Aspects of the washout of salmonid eggs. 4. Effects of a standard mechanical shock, applied at different stage of development, upon survival and development of eggs of brown trout (Salmo trutta L.). Ambleside, UK, Freshwater Biological Association, 23pp. (WIT/73/23).
(The document's language is
- Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat
Download (350Kb) | Preview
It is generally accepted by fish culturists that salmonid eggs are sensitive to mechanical shock and that the sensitivity varies with the stage of development of the eggs. In general, the period of greatest sensitivity is thought to occur between fertilization and ”eyeing”. However, it is reasonable to expect that, during a period (perhaps of several hours) following fertilization, sensitivity will be low because in nature during this period the eggs may be subject to some mechanical shock caused by the parent fish covering them with gravel. In 1983-4 and 1984-5 experiments were performed on brown trout (Salmo trutta L.) eggs to examine the effect of a standard mechanical shock (c. 2,500 eggs in 1983-4 and c. 8,400 eggs in 1984-5) at various stages of development upon survival to hatching and time of hatching.The results of these experiments are reported in this study.
|Item Type:||Monograph or Serial issue|
|Title:||Aspects of the washout of salmonid eggs. 4. Effects of a standard mechanical shock, applied at different stage of development, upon survival and development of eggs of brown trout (Salmo trutta L.)|
|Number of Pages:||23|
|Publisher:||Freshwater Biological Association|
|Place of Publication:||Ambleside, UK|
|Issuing Agency:||Freshwater Biological Association|
|Uncontrolled Keywords:||Fish eggs; Spawning; Freshwater fish; Experimental data; Survival; Mechanical stimuli; England; Cow Green Reservoir|
|Depositing User:||Hardy B Schwamm|
|Date Deposited:||28 Apr 2011 16:33|
|Last Modified:||29 Sep 2011 15:14|
Actions (login required)