Winter fishery of the Coregonidae family species in the estuarial area of the Lena River delta (Laptev Sea basin)
2019
Kirillov, A.F. | Burmistrov, E.V. | Sveshnikov, Yu.A.
All size and age groups of nelma, least cisco, arctic cisco and muksun inhabit the estuarial area of the Lena River delta. Here they grow, mature and form their spawning stocks. Species differentiation is not observed on the feeding areas and fishery for any one species leads to the fact that other species are also caught in the nets, which results in the damaged structure of populations as a considerable amount of fish in first maturity is withdrawn. The research has shown that catching of nelma, arctic cisco, least cisco and muksun in the estuarial area of the Lena River delta with 55–60 mm mesh gillnets exceeds the permissible for fishing bycatchrates established by the Fishing Regulations for East-Siberian Fishery Basin. To save the stocks of nelma, arctic cisco, muksun and least cisco in the Lena River basin, it is necessary to utterly forbid fishing in the estuarial area of the Lena River delta and to move it to the river’s channel, which will allow to increase arctic cisco spawning stock in the nearest future and ensure the increase of muksun population in the long term (during two-three decades).
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