International Journal of Limnology

As the first study investigating the effects of WTP discharges on the stream metabolism in Turkey, the results were compared with the previous studies in the literature. The study demonstrated that the WTP discharges increased the mean R_c from −30.6 g O₂ m⁻² day⁻¹ to −130.9 g O₂ m⁻² day⁻¹, and had no significant impact on the mean GPP, statistically (15.6 and 9.1 g O₂ m⁻² day⁻¹ before and after discharges, respectively). Furthermore, the study aimed at statistical modelling the metabolism rates as a function of measured environmental variables. The multiple non-linear regression models of NEM and R_c were derived with high validations (R² of 74.9% and 66.6%, respectively).

Pristine streams of a Pannonian lowland mountain support high mayfly species richness with diverse assemblage structure, which contributes significantly to our knowledge of mayflies in South Eastern Europe. Moreover, records of symbiotic parasite Symbiocladius rhithrogenae (Zavrel, 1924) attached to nymphs of Rhithrogena group semicolorata, represent new data for species distribution and show that our knowledge of the Croatian chironomid fauna is still growing.

We analyzed toxic and trace elements in carp from fish ponds. Fish liver was the main target organ for accumulation of Cu, Se and Zn, and dorsal muscle for Sr and Li. Fish liver showed a decrease of a range of elements towards the end of season. Arsenic was uniformly distributed in fish organs showing potential to build up in edible parts.

This study provided a zooplankton species list from 180 lakes in northeastern Brazil and showed that species distribution, richness and composition vary according to biome (Atlantic Forest or Caatinga), the lake origin (natural or man-made lakes), and the lake habitat (pelagic or littoral).

Our study introduces the first Bayesian Delay-Difference model adapted to whitefish fisheries in peri-alpine lakes. By analyzing various data, the model accurately estimates annual biomass, recruitment, stage structure of landings, and fishing mortality. These insights are invaluable for comprehending the historical trends and impacts of fishing activities on these stocks.

Due to the recorded preference for higher water temperature, dragonfly larvae preferred tufa barriers, while they were mostly absent from headwaters of mountainous streams. Favorable microhabitats were inorganic substrates associated with lower current velocity, in contrast to mosses associated with the strongest current. These results represent an important contribution to the knowledge of dragonfly ecology in karstic lotic habitats.

In our study of the spawning behaviour of lake whitefish, we observed fish using a variety of habitat types during the spawning season, including a rocky spawning shoal, sandy substrates, and steeper slopes. Both sexes moved shallower at night and deeper during the day, with males moving more at night and females more during the day. This study could help inform stewardship efforts aimed at lake whitefish spawning habitat restoration and protection.

Our study introduces the first Bayesian Delay-Difference model adapted to whitefish fisheries in peri-alpine lakes. By analyzing various data, the model accurately estimates annual biomass, recruitment, stage structure of landings, and fishing mortality. These insights are invaluable for comprehending the historical trends and impacts of fishing activities on these stocks.

Due to the recorded preference for higher water temperature, dragonfly larvae preferred tufa barriers, while they were mostly absent from headwaters of mountainous streams. Favorable microhabitats were inorganic substrates associated with lower current velocity, in contrast to mosses associated with the strongest current. These results represent an important contribution to the knowledge of dragonfly ecology in karstic lotic habitats.

Amphibians are major members of aquatic and terrestrial ecosystems. They serve as both predator and prey in both ecosystems. Therefore, they provide the transfer of energy between these systems. However, there are few studies on the gametogenesis of amphibian. Therefore, histological characteristics of Pelophylax bedriagae testes were studied.

In our study of the spawning behaviour of lake whitefish, we observed fish using a variety of habitat types during the spawning season, including a rocky spawning shoal, sandy substrates, and steeper slopes. Both sexes moved shallower at night and deeper during the day, with males moving more at night and females more during the day. This study could help inform stewardship efforts aimed at lake whitefish spawning habitat restoration and protection.