Effect of hook type and hook setting method on deep‐hooking rates when bait fishing for trout in lentic waters

2021 ◽  
Author(s):  
Luciano V. Chiaramonte ◽  
Kevin A. Meyer
Keyword(s):  
Lentic Waters

Gravel-Pit Lakes Connected with the River Rhine as a Reserve for High Productivity of Plankton and Young Fish

1994 ◽  
Vol 29 (3) ◽  
pp. 267-271 ◽  
Author(s):  
D. Neumann ◽  
Chr Seidenberg-Busse ◽  
A. Petermeier ◽  
St Staas ◽  
F. Molls ◽  
...  
Keyword(s):  
Flood Plain ◽  
River Rhine ◽  
Flood Events ◽  
Eutrophic Lakes ◽  
Field Station ◽  
High Productivity ◽  
Sand And Gravel ◽  
The University ◽  
Lentic Waters ◽  
Lower Rhine

During the last two decades an increasing number of sand and gravel-pits were established in the original flood plain of the River Rhine. Some of these are connected with the stream by a small canal for the transport of the spoil. Some of these dredged lakes have been studied during recent years at the ecological field station of the University of Köln, with regard to seasonal phytoplankton succession, productivity of copepods and cladocerans, occurrence of macrozoobenthos, and both spawning and recruitment of fish populations. These eutrophic lakes represent a valuable substitute biotope for lost lentic waters of the former flood plain. They offer via the canal connection an advantageous habitat to resident fish species of the Lower Rhine, (1) for reproduction and growth of the 0+-generation, and (2) for shelter during flood events. Recommendations for reclamation plans of such lakes are required.

Invertebrate zooplankton predator composition and diversity in tropical lentic waters

1990 ◽  
pp. 13-31 ◽  
Author(s):  
C. H. Fernando ◽  
Claudiu Tudorancea ◽  
Seyoum Mengestou
Keyword(s):  
Lentic Waters

scholarly journals Microplastics in Freshwater: What Is the News from the World?

Diversity ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 276 ◽  
Author(s):  
Alessandra Cera ◽  
Giulia Cesarini ◽  
Massimiliano Scalici
Keyword(s):  
Biodiversity Loss ◽  
Future Research ◽  
Data Sets ◽  
Negative Effects ◽  
Management Planning ◽  
Freshwater Organisms ◽  
Lack Of Information ◽  
Bibliographic Search ◽  
Available Information ◽  
Lentic Waters

Plastic has become a “hot topic” for aquatic ecosystems’ conservation together with other issues such as climate change and biodiversity loss. Indeed, plastics may detrimentally affect habitats and biota. Small plastics, called microplastics, are more easily taken up by freshwater organisms, causing negative effects on growth, reproduction, predatory performance, etc. Since available information on microplastics in freshwater are fragmentary, the aim of this review is twofold: (i) to show, analyse, and discuss data on the microplastics concentration in freshwater and (ii) to provide the main polymers contaminating freshwater for management planning. A bibliographic search collected 158 studies since 2012, providing the scientific community with one of the largest data sets on microplastics in freshwater. Contamination is reported in all continents except Antarctica, but a lack of information is still present. Lentic waters are generally more contaminated than lotic waters, and waters are less contaminated than sediments, suggested to be sinks. The main contaminating polymers are polypropylene and polyethylene for sediment and water, while polyethylene and polyethylene terephthalate are mainly found in biota. Future research is encouraged (1) to achieve a standardised protocol for monitoring, (2) to identify sources and transport routes (including primary or secondary origin), and (3) to investigate trophic transfer, especially from benthic invertebrates.

scholarly journals Atmospheric controls on hydrogen and oxygen isotope composition of meteoric and surface waters in Patagonia

2018 ◽  
Author(s):  
Christoph Mayr ◽  
Lukas Langhamer ◽  
Holger Wissel ◽  
Wolfgang Meier ◽  
Tobias Sauter ◽  
...  
Keyword(s):  
Isotope Composition ◽  
Isotope Effects ◽  
Atlantic Coast ◽  
Climate Data ◽  
Moisture Recycling ◽  
Moisture Sources ◽  
The Andes ◽  
The Pacific ◽  
Hydrogen And Oxygen Isotope ◽  
Lentic Waters

Abstract. The southern tip of South America, commonly referred to as Patagonia, is a key area to understand Southern Hemisphere Westerlies (SHW) dynamics and orographic isotope effects in precipitation. However, only few studies have addressed these topics. We evaluated the stable isotope (δ2H, δ18O) compositions of precipitation, lentic waters, and lotic waters in that area to characterize and understand isotope fractionation processes associated with orographic rainout, moisture recycling and moisture sources. Observational data were interpreted with the help of backward trajectory modelling of moisture sources using reanalysis climate data. While the Pacific serves as the exclusive moisture source for sites upwind of the Andes and on the immediate downwind area of the Andes, recycled moisture from the continent seems to be the main humidity source at the Patagonian Atlantic coast. In contrast, the Pampean Atlantic coast north of Patagonia obtains moisture from the Atlantic Ocean. In the core zone of the SHW at a latitude of 50° S, a depletion in the heavy isotopes of 10 ‰ and 85 ‰, for δ18O and δ2H, respectively, occurs due to orographic rainout corresponding to a drying ratio of 0.45.

scholarly journals Analisis Kelimpahan Dan Keanekaragaman Perifiton Rawa Bangkau Kabupaten Hulu Sungai Selatan Kalimantan Selatan

2020 ◽  
Vol 16 (3) ◽  
pp. 366
Author(s):  
Deddy Dharmaji ◽  
Suhaili Asmawi ◽  
Yunandar Yunandar ◽  
Rio Rizky Kurniawan
Keyword(s):  
Aquatic Vegetation ◽  
Diversity Index ◽  
National Standard ◽  
Natural Food ◽  
Standard Methods ◽  
Wiener’S Index ◽  
Abundance And Diversity ◽  
Sampling Procedures ◽  
Middle Station ◽  
Lentic Waters

Periphyton group are biota communities that be able adapt and grow well in lentic waters. Their habits are adhere to a permanent location. Aquatic vegetation in Bangkau can influenced the periphyton abundance and diversity as natural food in the food chain. The purpose of this study was to analyzed abundance and diversity of Periphyton from different aquatic vegetation. The research was conducted in three stations by purposive sampling. The method used was quantitative explored. The data that has been taken were epiphythic periphyton samples. Periphyton sampling procedures, preservation, and analysis were carried out based on Indonesian National Standard methods. Bangkau’s peatland had the highest abundance of phytoplankton-periphyton (9982 sel/liter) in inlet, but low at middle station (778 sel/liter). Zooplankton-periphyton (553 sel/liter) in middle station was the highest abundance whereas in outlet station (153 sel/liter) was the lowest. Bacillariophyceae had predominant and always attendanced Oscillatoria, Closterium, Planktonella, Diatom, meanwhile zooplankton-periphyton dominated Ciliophora in all stations and sampling. Diversity index of phytoplankton-periphyton in inlet station (1,55) was the highest and in inlet (0,77) was the lowest. Zooplankton-periphyton in middle (1,76) and outlet (0,94) was different based on Shannon wiener’s Index. The abundance index of Bangkau were mesotrophic categorized for phytoplankton-periphyton and oligotrophic for zooplankton-periphyton. Due to the low level of species diversity (H’≤ 3) showed moderate stability and for the water quality conditions was moderate polluted. 

scholarly journals Imbabura and Chimborazo at the cradle of Biogeography in the South American Andes

2020 ◽  
Vol 4 (5) ◽  
pp. 188-196
Author(s):  
Alberto Gomez Gutierrez
Keyword(s):  
Environmental Variables ◽  
South American ◽  
Total Zooplankton ◽  
Present Contribution ◽  
Freshwater Zooplankton ◽  
Physico Chemical ◽  
Rivers And Streams ◽  
The Status ◽  
Freshwater Habitats ◽  
Lentic Waters

The present contribution is a comprehensive review of the status of biodiversity of freshwater zooplankton of Uttarakhand Himalaya. Uttarakhand harbours a wide diversity in freshwater habitats in terms of rapids, riffles, runs, cascades of falls and pools of rivers and streams and the shallow and swift water of springs and lentic waters of lakes, ponds and reservoirs with varied physico-chemical environmental variables. Freshwater zooplankton of Uttarakhand are composed of the taxa of Protozoa, Rotifera, Copepoda, Cladocera and Ostrocoda. Ritifera contributes maximum (40.50%) with thirty two species followed by Protozoa (22.78%) with eighteen species and Cladocera (22.78%) with eighteen species to the total zooplankton taxa of Uttarakhand. Copepoda contributes 8.86% with seven species, while minimum contribution (5.08%) with only four species is made by Ostracoda to the total zooplankton taxa of Uttarakhand. Seasonal variation in the abundance of zooplankton in addition to diurnal vertical migration in diverse freshwater habitats of Uttarakhand Himalayahas also been reported.

scholarly journals Epiphytic diatoms in lotic and lentic waters - diversity and representation of species complexes

Fottea ◽  
2015 ◽  
Vol 15 (2) ◽  
pp. 259-271 ◽  
Author(s):  
Jan Kollar ◽  
Marketa Frankova ◽  
Petr Hasler ◽  
Marketa Letakova ◽  
Aloisie Poulickova
Keyword(s):  
Epiphytic Diatoms ◽  
Species Complexes ◽  
Lentic Waters
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