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- W4285248954 abstract "Data on the age, sex, and size-weight composition of the Rapa whelk (Rapana venosa) population were obtained basing on the analysis of 69 beam trawl catches and 7 diving samplings in the north-western section of the Black Sea over 2018-2020. The Rapa whelk in the catches was presented by twelve age groups from 2+ to 13+, and the bulk of them were individuals of the age 7+-8+. Ratio of males and females on the whole was close to 1 : 1. However, females dominate in the younger age groups, and males - in the older groups owing to the higher natural mortality of females. The values of the growth parameters from the Bertalanffy equation were used to estimate natural mortality by the ProdBiom method. The average value of the natural mortality rate in the population was equal to 0.41. Despite the facts that the Rapa whelk has become the main object of Ukrainian commercial catching and its withdrawal increased drastically in recent years, the structure of the population has not undergone significant changes so far, the most probably due to the high reproductive capacity of this invasive species, which has no natural enemies, and abundance of food objects in the shallow shelf of Ukraine. The data obtained can be used for further modeling of population dynamics and fishery regulation." @default.
- W4285248954 created "2022-07-14" @default.
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- W4285248954 date "2022-01-01" @default.
- W4285248954 modified "2023-09-25" @default.
- W4285248954 title "The Main Biological Parameters of Rapa Whelk Rapana venosa Population in the North-Western Section of the Black Sea" @default.
- W4285248954 doi "https://doi.org/10.1615/hydrobj.v58.i3.30" @default.
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