Results 71 to 80 of about 10,162 (245)

Site Fidelity, Depth Preference and Vertical Movement Patterns of Lentic and Lotic European Catfish Silurus glanis

Fisheries Management and Ecology, EarlyView.
ABSTRACT To study variables that may trigger the dispersion of the currently expanding European catfish in its native distribution limits, 42 individuals were captured from Upper Lake Constance (lentic) and 42 from two streaming tributaries (lotic), fitted with pressure and temperature loggers, and released at the site of capture (control: lotic or ...
Albert Ros, Jan Baer, Matthias Fromherz, Juergen Geist, Alexander Brinker   +4 more
wiley   +1 more source

Northern cod (Gadus morhua) movement: insights from acoustic telemetry and genomics

Journal of Fish Biology, EarlyView.
Abstract Knowledge of the timing and diversity of fish movements within a commercially exploited stock complex is required to ensure the sustainability of fisheries. Although migration can be driven by environmental factors, genomic mechanisms also play an important role in this complex life‐history trait. The northern cod (Gadus morhua) stock complex,
M. Lisette Delgado, Nicole Smith, Frederick Whoriskey, Steve Devitt, Emilie Novaczek, Corey J. Morris, Tony Kess, Ian Bradbury, Sara Iverson, Paul Bentzen, Daniel E. Ruzzante   +10 more
wiley   +1 more source

The role of security in Danube cruise tourism [PDF]

, 2023
Cruise tourism has witnessed dynamic development over the last twenty years, which was only disrupted by the Covid-19 pandemic. This trend can be contrasted with the observed decline in freight transport, which has mitigated the low rate of waterway ...
Nagy, Dávid, Spiegler, Patrícia, Egyed, Ildikó   +2 more
core  

Contribution to the knowledge on the distribution of freshwater sponges – the Danube and Sava rivers case study

Journal of Limnology, 2017
Sponges in the large rivers within the Danube River Basin (DRB) have not been adequately studied. Hence, the aim of this work was to undertake an investigation on the distribution of sponge species in the Danube and Sava rivers.
Stefan Andjus, Nadja Nikolic, Valerija Dobricic, Ana Marjanovic, Zoran Gacic, Goran Brankovic, Maja Rakovic, Momir Paunovic   +7 more
doaj   +1 more source

Relationship between the environment and the occurrence of invasive pumpkinseed Lepomis gibbosus in lotic and lentic habitats

Journal of Fish Biology, EarlyView.
Abstract The pumpkinseed Lepomis gibbosus is a freshwater fish species native to North America. It has been introduced to Europe, where it is recognized as one of the worst aquatic invaders due to its high adaptability and invasive potential. This study aimed to determine the presence of L. gibbosus in small to medium‐sized water bodies, both lotic and
Ivan Špelić, Marko Glogoški, Marina Piria   +2 more
wiley   +1 more source

First record for an alien oriental river prawn Macrobrachium nipponense (De Haan, 1849) (Decapoda, Palaemonidae) distribution in the lower Danube, Bulgarian part confirmed with DNA barcoding [PDF]

Nature Conservation
The alien species Macrobrachium nipponense (De Haan, 1849), known as the oriental river prawn, has been identified in the Bulgarian part of the Lower Danube for the first time, based on morphological characteristics and DNA barcoding. Four specimens were
Yordan Kutsarov, Petya Ivanova, Nina Dzhembekova, Violin Raykov, Elitsa Hineva, Elica Valkova, Kristian Yakimov   +6 more
doaj   +3 more sources

Speciation of European bullheads (Cottus spp.): The next problem for taxonomy of northern freshwater fishes

Journal of Fish Biology, EarlyView.
Abstract High morphological and ecological diversity displayed by European bullheads led Freyhof et al. (2005) to describe 15 nominal species. However, the basis for declaring these nominal species is contentious due to a lack of rigorous statistical analysis of morphological variations among populations, limitations in the inferences made from ...
David S. Murray, Vladimír Kováč, David Wright, Gordon H. Copp   +3 more
wiley   +1 more source

Genotoxicity assessment of Danube River: in situ and in vitro methods

, 2021
09-11 June 2021 Neuburg/Donau, Germany Proceedings: p 18Water quality in the Danube River Basin is largely influenced by the inputs of pollutants - particularly excessive nutrients, organic material, and hazardous substances, which affects the whole ...
Kostić-Vuković, Jovana, Subotić, Srđan, Gačić, Zoran, Višnjić-Jeftić, Željka, Đorđević, Jelena, Vuković-Gačić, Branka, Kolarević, Stoimir, Sunjog, Karolina, Lenhardt, Marijana   +8 more
core  

Temperature effects from hydropeaking impair egg and larval development in Danube salmon Hucho hucho and brown trout Salmo trutta

Journal of Fish Biology, EarlyView.
Abstract Hydropeaking is considered an important stressor for salmonids and other species in rivers affected by hydropower. In this study, we investigated the in situ effects of hydropeaking on the survival of eggs and larvae of fall spawning brown trout as well as spring spawning Danube salmon.
Julius Gorenz, Elisabeth Winter, Joachim Pander, Juergen Geist   +3 more
wiley   +1 more source

Proliferative Kidney Disease and Viral Pathogens in Wild Brown Trout (Salmo trutta) Populations in the Czech Republic

Journal of Fish Diseases, EarlyView.
ABSTRACT Populations of wild brown trout (Salmo trutta) have been in long‐term decline across Central Europe, including the Czech Republic, with multiple factors, such as habitat alteration, climate change, predation and emerging diseases, implicated.
Miroslava Palíková, Ivana Mikulíková, Tomáš Doležal, Ivana Papežíková, Kateřina Matějíčková, Jitka Motlová, Hana Novotná, Ivona Toulová, Jan Grmela, Anna Šindelářová, Ľubomír Pojezdal   +10 more
wiley   +1 more source