Sediments, not plants, offer the preferred refuge for Daphnia against fish predation in Mediterranean shallow lakes: an experimental demonstration

Tavsanoglu, Ulku Nihan
Cakiroglu, Ayse Idil
Erdogan, Seyda
Meerhoff, Mariana
Jeppesen, Erik
Beklioğlu, Meryem
1. Different behavioural responses of planktonic animals to their main predators, fish, have been reported from shallow lakes. In north temperate lakes, large-bodied zooplankton may seek refuge from predation among macrophytes, whereas in subtropical lakes, avoidance of macrophytes has been observed. The prevalent behaviour probably depends on the characteristics of the fish community, which in Mediterranean lakes is typically dispersed in both the open water zone and in the littoral, as in temperate lakes, and is dominated by small size classes, as in subtropical lakes.


Spatio-temporal patterns and environmental controls of small pelagic fish body condition from contrasted Mediterranean areas
Brosset, Pablo; et. al. (2017-02-01)
Small pelagic fish are among the most ecologically and economically important marine fish species and are characterized by large fluctuations all over the world. In the Mediterranean Sea, low catches and biomass of anchovies and sardines have been described in some areas during the last decade, resulting in important fisheries crises. Therefore, we studied anchovy and sardine body condition variability, a key index of population health and its response to environmental and anthropogenic changes. Wide tempor...
Fish and mucus-dwelling bacteria interact to produce a kairomone that induces diel vertical migration in Daphnia
Beklioğlu, Meryem; Gözen, Ayşe Gül (Wiley, 2006-12-01)
1. Bacterial populations associated with fish have previously been documented to be crucial for the production of chemical signals governing the interactions between predator fish and zooplankton prey.
Energy-based top-down and bottom-up relationships between fish community energy demand or production and phytoplankton across lakes at a continental scale
Bartrons, Mireia; Mehner, Thomas; Argillier, Christine; Beklioğlu, Meryem; Blabolil, Petr; Hesthagen, Trygve; Sweden, Kerstin Holmgren; Jeppesen, Erik; Krause, Teet; Podgornik, Samo; Volta, Pietro; Winfield, Ian J.; Brucet, Sandra (Wiley, 2020-04-01)
Fish community feeding and production rates may differ between lakes despite similar fish biomass levels because of differences in size structure and local temperature. Therefore, across-lake comparisons of the strength and direction of top-down and bottom-up fish-phytoplankton relationships should consider these factors. We used the metabolic theory of ecology to calculate size- and temperature-corrected community energy demand (CEDom) and community production (CP) of omnivorous fishes in 227 European lake...
Current distribution of the small pelagic fish populations in the North Eastern Levantine Sea in relation to environmental conditions and predicting the impacts of temperature rise on their future distributions
Sakınan, Serdar; Gücü, Ali Cemal; Department of Marine Biology and Fisheries (2014)
Stocks of traditionally targeted fish species are in decline in the north eastern Levant Sea due to overfishing during recent decades, while catch statistics show a simultaneous increase in landings of commercially less valuable small pelagic species. Moreover, the number of species in the eastern Mediterranean is increasing due to Lessepsian migration and the response of native species to the continuous migration of lessepsian species is in question. Additionally, warming associated with climate change is ...
Size-based diel migration of zooplankton in Mediterranean shallow lakes assessed from in situ experiments with artificial plants
Tavsanoglu, Ulku Nihan; Brucet, Sandra; Levi, Eti Ester; Bucak, Tuba; Bezirci, Gizem; Ozen, Arda; Johansson, Liselotte S.; Jeppesen, Erik; Beklioğlu, Meryem (2015-07-01)
In warm lakes, fish aggregate within macrophytes, thereby weakening the role of these as a daytime refuge for zooplankton and altering the zooplankton size structure, predation pressure, and water clarity. To elucidate the role of macrophytes as a refuge for zooplankton and their effect on zooplankton size distribution, we established three sets of strandardized artificial plant beds in 11 lakes in Turkey with contrasting fish predation risk and turbidity. Zooplankton were sampled within and outside of each...
Citation Formats
U. N. Tavsanoglu, A. I. Cakiroglu, S. Erdogan, M. Meerhoff, E. Jeppesen, and M. Beklioğlu, “Sediments, not plants, offer the preferred refuge for Daphnia against fish predation in Mediterranean shallow lakes: an experimental demonstration,” FRESHWATER BIOLOGY, pp. 795–802, 2012, Accessed: 00, 2020. [Online]. Available: