Reproduction and development in the dwarf form of Arctic charr Salvelinus alpinus from Lake Davatchan, Transbaikalia |
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Authors: | D A Pavlov A G Osinov |
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Institution: | (1) Biological Faculty, Moscow State University, Vorob’evy gory, Moscow, 119899, Russia |
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Abstract: | Biological characteristics in the deepwater dwarf form of Arctic charr Salvelinus alpinus from Lake Davatchan, Transbaikalia, are described. In nine from fifteen attempts of artificial insemination of eggs from
a female by sperm from a male, developing eggs are obtained. Embryonic and larval development is described at the initial
temperature 1.6–3.6°C and subsequent (from early gastrulation to the transition of larvae to exogenous feeding) average temperature
4.4 and 8.6°C. To take into account the data obtained previously (Pavlov et al., 1990, 1993b), the comparison of early ontogeny
is conducted between the dwarf and small forms of charr from Lake Davatchan and the charr from Lake Leprindokan (two lakes
are separated by the ridge 8 km in width). A substantial similarity in early ontogeny between the dwarf and small forms of
charr from Lake Davatchan suggests that genes controlling development of the embryos and prelarvae until the transition of
the young to exogenous feeding have not been subjected to natural selection determining a considerable differentiation between
two forms and their reproductive isolation.
Published in Voprosy Ikhtiologii, 2008, Vol. 48, No. 1, pp. 102–119.
The article was translated by the author. |
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