vestibИзвестия Национальной академии наук Беларуси. Серия биологических наукProceedings of the National Academy of Sciences of Belarus, Biological Series1029-89402524-230XThe Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"10.29235/1029-8940-2023-68-2-147-153vestib-871Research ArticleСтатьиПлодовитость длиннопалого рака Pontastacus leptodactylus в водоемах БеларусиFecundity of the narrow-clawed crayfish Pontastacus leptodactylus in the water bodies of BelarusАлехновичА. В.AlekhnovichA. V.

Алехнович Анатолий Васильевич – канд. биол. наук,вед. науч. сотрудник

ул. Академическая, 27, 220072, г. Минск

Anatoly V. Alekhnovich – Ph. D. (Biol.), Leading Researcher

27, Akademicheskaya Str., 220072, Minsk

Alekhnovichav@gmail.comНаучно-практический центр НАН Беларуси по биоресурсамScientific and Practical Center of the National Academy of Sciences of Belarus for Bioresources202305052023682147153Copyright © Алехнович А.В., 20232023Алехнович А.В.Alekhnovich A.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestibio.belnauka.by/jour/article/view/871

Оценены овариальная плодовитость и плодовитость перед выклевом личинок длиннопалого рака в озерах и водохранилищах Беларуси. За исключением оз. Кичино, для всех остальных водных объектов показатели плодовитости самок перед выклевом личинок в зависимости от длины статистически не различались. Наибольшие потери яиц отмечены в период нереста, т. е. откладки яиц, их оплодотворения и прикрепления к плеоподам самки. За этот короткий период (2–3 ч) смертность яиц у самок 120 мм TL составляла 30 %, у мелких самок она снижалась, у крупных увеличивалась. За период вынашивания кладки смертность яиц составляла в среднем 8 %. Общие потери яиц за период вынашивания кладки – от 4 % у самок 80 мм TL, впервые участвующих в размножении, до 45 % у самок 160 мм TL. 

Pre-larvae hatching fecundity and ovarian fecundity of narrow-clawed crayfish populations were estimated in the lakes and reservoirs of Belarus. Statistically significant differences in the fecundity of females from various water bodies were noted only for Lake Kichino. For all other water bodies, the fecundity dependence on the length of females did not differ statistically and was described by one equation. The greatest loss of eggs was noted during the spawning period (oviposition), insemination and attachment to pleopods of the female. During this short period (2–3 hours), egg mortality of females 120 mm TL is 30 %, it decreases for small females and increases for large ones. During the gestation period, egg mortality averages 8 %. 

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The authors declare that there are no conflicts of interest present.