Results 11 to 20 of about 2,022 (216)

On the Stock Estimation for a Harvested Fish Population [PDF]

open access: yesBulletin of Mathematical Biology, 2011
We consider a stage-structured model of a harvested fish population and we are interested in the problem of estimating the unknown stock state for each class. The model used in this work to describe the dynamical evolution of the population is a discrete time system including a nonlinear recruitment relationship.
Guiro, Aboudramane   +2 more
openaire   +3 more sources

Modern state of aquatic biological resources of the Amur River basin and directions of their research

open access: yesИзвестия ТИНРО, 2020
Current status of aquatic biological resources in the middle and lower parts of the Amur River basin, including Lake Khanka and the Amursky Liman, is assessed. Generally high abundance of the water organisms is noted, but a downward trend is revealed. In
N. V. Kolpakov   +12 more
doaj   +1 more source

Coastal fishes in the northwestern Okhotsk Sea (westward from 147o E): fishery and prospects of its development

open access: yesИзвестия ТИНРО, 2020
Fishery at the northwestern Okhotsk Sea coast is analyzed for the period from 2000 to 2019. Pacific herring, saffron cod, pacific cod, capelin, flounders (Limanda aspera, Pleuronectes quadrituberculatus and Platichthys stellatus), and smelts (Hypomesus ...
V. P. Ovsyannikov
doaj   +1 more source

Bathymetric groupings of demersal fishes on the slope and outer shelf at the oceanic side of southern Kuril Islands in spring season

open access: yesИзвестия ТИНРО, 2014
Abundance and species composition are investigated for demersal fish at the oceanic side of southern Kuril Islands on the data of the bottom trawl survey in the depth range 100-1400 m conducted in the spring of 2009 (for the first time at the continental
Andrei B. Savin
doaj   +1 more source

Exploitation dynamics of fish stocks [PDF]

open access: yesEcological Informatics, 2006
27 pages, 19 ...
openaire   +2 more sources

Selected haematological changes in Clarias gariepinus (Burchell, 1822) infected with a Trypansosoma sp. from the Vaal Dam, South Africa

open access: yesOnderstepoort Journal of Veterinary Research, 2013
The use of haematological techniques to assess fish health is generally accepted. The aim of the current study was to determine selected haematological changes that occur in Clarias gariepinus (Burchell, 1822). infected with trypanosomes.
Maryke L. Ferreira   +1 more
doaj   +1 more source

Dependence of progeny abundance for fall chum salmon ( Oncorhynchys keta) in the Amur River on the parents abundance

open access: yesИзвестия ТИНРО, 2015
The stock of the Amur fall chum salmon ( Oncorhynchys keta ) was low in 2000-2005 (annual catches varied in the range of 500-1300 t) but began to increase since 2006 and the catch exceeded 22000 t in 2014.
Vladimir I. Ostrovsky   +2 more
doaj   +1 more source

Magnitude of bycatch of Hippocampus patagonicus, an endangered species, in trawl fisheries in Southeast and South Brazil

open access: yesFrontiers in Marine Science, 2023
One of the biggest threats to the world’s fish stocks is trawling with indiscriminate capturing of non-target organisms, typically referred to as bycatch. Some species of seahorses are globally threatened and are often targets caught as bycatch.
Rosana Beatriz Silveira   +2 more
doaj   +1 more source

Stocks and fishery of cod (Gadus macrocephalus, Gadidae) in the northwestern Bering Sea in 1965–2022

open access: yesИзвестия ТИНРО, 2023
For pacific cod in the northwestern Bering Sea, biomass of the summer-fall feeding aggregations in the specified area of their highest density (polygon) is considered as a stock unit.
A. B. Savin
doaj   +1 more source

Commercial resources of saffron cod Eleginus gracilis in the Russian waters of the Far-Eastern Seas

open access: yesИзвестия ТИНРО, 2023
Saffron cod Eleginus gracilis, being a typical representative of the elittoral ichthyocene, is an important commercial species in the coastal areas of the Far-Eastern Seas. Small- and medium-sized vessels equipped with both active fishing gears as Danish
O. V. Novikova   +4 more
doaj   +1 more source

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