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Population dynamics and feeding ecology of the western tubenose goby (Proterorhinus semilunaris) in the Stugna River, Dnieper River basin, Ukraine

100%

Didenko A. , Volikov Y. , Gurbyk A. , Kruzhylina S. , Buzevych I. , Bekh V.

2024

tom Vol. 53, No. 1

61--70

The study investigated the inter-annual and seasonal population dynamics, as well as the feeding habits of the western tubenose goby Proterorhinus semilunaris in an invaded river close to its natural range (Dnieper River basin). Material was collected monthly in 2015–2016 and 2018 at one sampling site located in the Stugna River, at a distance of 1100 m from the point where it enters the Kaniv reservoir. Catch-per-unit-efforts (CPUE) of this species at the sampling site varied considerably, both between different months within a given year and between the analyzed years, from 1.1 to 127.1 fish 100 m-2. Peak abundances were observed in July in both 2015 and 2018, and then dropped sharply in the following months. The western tubenose goby is characterized by a protracted spawning season, lasting from April to July. A total of 50 prey taxa were recorded in the diet of the western tubenose goby at the sampling site, among which chironomids were the most abundant and most frequently encountered, followed by cladocerans. This gobiid at the sampling site preyed mainly among submerged vegetation, where phytophilous chironomids were the most important prey.

Mapping an ecosystem service: A quantitative approach to derive fish feeding ground maps

86%

Šiaulys A. , Daunys D. , Bučas M. , Bacevičius E.

Oceanologia

2012

tom No. 54 (3)

491-505

This study presents a quantitative approach to mapping benthophagous fish feeding grounds. This approach combines the spatial biomass distribution of benthic prey items and their importance for the diets of predators. A point based biomass data of macrozoobenthos together with a set of environmental factors was used to develop Random Forests models that produce continuous biomass distribution layers for individual prey species. Depending on the diet composition and the importance of prey for fish feeding, these layers are overlaid and an integrated GIS map of the seabed showing the quality of feeding grounds is generated. These maps provide a useful basis for conservation and marine spatial planning. In addition, this method could be applied to the mapping of resources used by other benthophagous organisms. The method is presented using the example of three common Baltic fish species: cod, flounder and viviparous eelpout.

Zanieczyszczenia chemiczne w diecie rybnej polskiego konsumenta

72%

Bykowski P. J. , Dobrzański Z.

Przemysł Chemiczny

2014

tom T. 93, nr 10

1763-1766

Na podstawie zaprezentowanego przeglądu wiedzy na temat podstawowych zanieczyszczeń chemicznych (wielopierścieniowe węglowodory aromatyczne, polichlorowane dioksyny i bifenyle, metale toksyczne), badań statystycznych dotyczących konsumpcji ryb i produktów rybnych w Polsce stwierdzono, że w praktyce istnieje tylko niewielkie zagrożenie dla zdrowia konsumenta, będące efektem zanieczyszczeń chemicznych pobieranych w diecie rybnej.

A review, with 46 refs. No toxicity hazard of polycyclic arom. hydrocarbons, polychlorinated dibenzodioxines and furanes, polychlorinated Ph₂, As, Hg, Pb and Cd exists under Polish conditions.