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Prejs, Andrzej; Pijanowska, Joanna; Koperski, Paweł; Martyniak, Andrzej; Boroń, Sławomir; Hliwa, Piotr

doi:10.1023/a:1017047625303

Cited by 14 publications

(3 citation statements)

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“…With regard to the stock of piscivorous fishes, many studies were not successful [6,17], mainly due to the low stocking density [21]. In many studies the top-down effect was observed [4,5,13,15,[25][26][27][28][29]. [25] suggest that knowing how the food chain works can be useful for the management of aquatic ecosystems aiming at ecology conservation.…”

Section: Trophic Cascade Interactions In Reservoirsmentioning

confidence: 99%

“…Water transparency has a strong influence on the trophic aquatic environments, and penetration of light determines the development of phytoplanktonic organisms and therefore environmental enrichment [70,77,78]. In addition to the input of allochthonous material, which is transported and sedimented in water, contributing to the reduction of water transparency, high fish biomasses can also reduce water transparency [4,27,79] due to increased nutrients owing to the excretions of fishes [20,80].…”

Section: Limnology Of the Itaipu Reservoirmentioning

confidence: 99%

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Eutrophication Indexes Used as Fish Production Parameters in the Itaipu Reservoir (Brazil)

Filho

Pereira²,

Júnior³

et al. 2013

JEP

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The knowledge of liminology can be applied in studies of trophic state indexes and morfoedaphic indexes as factors for determining the inference fish production in reservoirs. This work is based on the hypothesis of the trophic cascade relations, particularly related to bottom-up and top-down effect in Itaipu Reservoir (Brazil). Using the data available by Itaipu, from 1999 to 2004, analyzes of multiple regressions were accomplished to determine the relationships of the dependent and independent variables. We applied the trophic state indices (TSI) based on readings Secchi disk, total phosphorus and chlorophyll-a density for obtaining TSI medium. Morfoedaphic index was calculated based on the reading of the concentration of dissolved solids and the inference of fishing yield, from this index. The average results of the trophic state indices indicate an oligotrophic status for the entire reservoir as well as for the riverine, transition and lacustrine zones separately. The fish was yieldn Estimated by the relation with cyanobacteria concentration, and this was the best variable que explained this prediction. The use of the morfoedaphic index (MEI), with the recorded catch data, predictive models can generate que estimate the fishing yield in the Itaipu Reservoir. The relations of MEI with chlorophyll-a and water transparency que Indicate this index may be a good predicting factor for future fish captures.

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Section: Trophic Cascade Interactions In Reservoirsmentioning

confidence: 99%

Section: Limnology Of the Itaipu Reservoirmentioning

confidence: 99%

Eutrophication Indexes Used as Fish Production Parameters in the Itaipu Reservoir (Brazil)

Filho

Pereira²,

Júnior³

et al. 2013

JEP

View full text Add to dashboard Cite

show abstract

“…Pike can regulate the populations of prey species in its ecosystem, as well as its own population due to high cannibalistic behavior (Sharma and Borgstrøm 2008;Harvey 2009). In addition, stocking of pike is used in biomanipulation experiments as an indirect tool to reduce the eutrophication process (Prejs et al 1997). Because of all these features, the pike has been the subject of many different studies such as migration (Karás and Lehtonen 1993), feeding biology (Yazicioglu et al 2018), otolith chemical studies (Stańczak et al 2017;Möller et al 2019), ecology (Craig 2008) and genetic (Nordahl et al 2019;Sunde et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Stock Discrimination of Northern Pike Esox lucius L., 1758 Inhabiting Lakes Simenlik and Ladik (Samsun-Turkey) Using Otolith Biometry and Shape Analysis

HANÇER

Özpiçak

Saygın

et al. 2022

Journal of Limnology and Freshwater Fisheries Research

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This study was carried out to investigate the relationships between total length and otolith dimensions and to detect the otolith shape index values of Northern pike (Esox lucius) which has high economic value, sampled from Ladik and Simenlik Lakes. A total of 140 specimens (Lake Ladik: 82 individuals, Lake Simenlik: 58 individuals) were sampled. Otolith height, length, perimeter, and area were determined by Imaging Software. Nonlinear and linear models were applied to estimate the relationships between the otolith measurements and total length. Form factor, circularity, roundness, rectangularity, aspect ratio, and ellipticity were used for otolith shape analyses. It was found that the relationship between the total length-otolith length was found to have the highest r2 value (Lake Ladik r2=0.949, Lake Simenlik r2=0.914) among the total length-otolith morphometrics at both localities. Otolith shape indices were calculated by using otolith measurements. As a result of comparing shape indices, it was found that there was a significant difference in two localities using roundness, ellipticity, and aspect ratio (P <0.05). The results indicated otolith shape indices could be used as a suitable tool to discriminate Northern pike populations.

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Factors Affecting the Performance of Stillwater Coarse Fisheries in England and Wales

North

2002

Management and Ecology of Lake and Reservoir Fisheries

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Cited by 14 publications

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Eutrophication Indexes Used as Fish Production Parameters in the Itaipu Reservoir (Brazil)

Eutrophication Indexes Used as Fish Production Parameters in the Itaipu Reservoir (Brazil)

Stock Discrimination of Northern Pike Esox lucius L., 1758 Inhabiting Lakes Simenlik and Ladik (Samsun-Turkey) Using Otolith Biometry and Shape Analysis

Factors Affecting the Performance of Stillwater Coarse Fisheries in England and Wales

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