The dataset contains records of Fishes (Pisces) collected in the lower valley of River Sabor (NE Portugal) in the scope of the long-term Ecological Monitoring Program (PME) of the Baixo Sabor Hydroelectric Dams (AHBS), promoted by EDP – Energias de Portugal, S.A, to evaluate the impacts of dam construction in the fish communities and water quality of the river. This dataset refers to the year of 2012, during the construction process. Fishes were captured in 16 sampling stations by electrofishing (with restitution) in speing and autumn of 2012. A total of 2214 records of 11 species and one genus were obtained.

The aim of the study was to assess the impact of the building of hydroelectric dams along the Rhône River in France in the first instance and to evaluate the effect on aquatic communities, especially fish communities, of the increase of minimum flow in by-passed sections. Fish were collected using Electric fishing in independent habitat units (Nelva et al., 1979, Vadas and Orth, 1993). Data were collected between July and December form 1985 to 2020. The dataset includes the number of individuals sampled for each species in one station during one sampling campaign (once a year). The sampling area is indicated. See example of publication using the data : Cauvy-Fraunié, S., Trenkel, V.M., Daufresne, M., Maire, A., Capra, H., Olivier, J.M., Lobry, J., Cazelles, B., Lamouroux, N., 2020 -Interpretation of interannual variability in long-term aquatic ecological surveys. Canadian Journal of Fisheries and Aquatic Sciences, 77(5): 894-903. https://doi.org/10.1139/cjfas-2019-0146

The fish assemblage of the Mar Piccolo of Taranto (Southern Italy), an important ecosystem in the Mediterranean Sea, was assessed. A total of 6514 individuals were monthly collected, between July 2007 and April 2009 identifying 28 species within 16 families. Mugilidae, Atherinidae, Labridae and Gobidae were the dominant families. The Mugilidae were represented by 5 species, contributed for about 36% of the numerical abundance of the total catch, and mostly consisted of Liza aurata (25%) L. saliens (7.6%), L. ramada (1.2%), Mugil cephalus (1.2%) and Chelon labrosus (0.7%). Although Atherinidae was represented by Atherina boyeri, the contribution rate of this species was quite high (27.3%) of total catches with 1776 of total individuals. Labridae and Gobidae were the next dominant families accounting for 14.2% and 10.8% respectively. The results showed that the fish fauna found is similar to the ichthyofauna of other transitional ecosystems in the Mediterranean

The dataset contains records of Fishes (Pisces) collected in the River Sabor (NE Portugal) in 2012-2020, in the scope of a study aiming to understand the temporal dynamics of fish communities in relation to natural and anthropogenics drivers in a Mediterranean watershed. The study is part of research carried out at the Long Term Ecological Research Site (LTER) of Baixo Sabor (lter_eu_pt_002; https://deims.org/45722713-80e3-4387-a47b-82c97a6ef62b). The dataset includes data on fish communities obtained through electro-fishing (with restitution) at 74 sampling sites in 2012, and subsequently at 37 of these sites from 2013-2020. Until 2020, the data include a total of 27,514 records of 14 freshwater fish species. Part of these data has already been analised and published (see Ferreira et al., 2016; Mota-Ferreira et al., 2021). The dataset will be regularly updated with additional data from future sampling years.

data on two electronic fishing samplings in Thraunenbach (2006,2019)

The fish assemblage of the Mar Piccolo of Taranto (Southern Italy), an important ecosystem in the Mediterranean Sea, was assessed. A total of 6514 individuals were monthly collected, between July 2007 and April 2009 identifying 28 species within 16 families. Mugilidae, Atherinidae, Labridae and Gobidae were the dominant families. The Mugilidae were represented by 5 species, contributed for about 36% of the numerical abundance of the total catch, and mostly consisted of Liza aurata (25%) L. saliens (7.6%), L. ramada (1.2%), Mugil cephalus (1.2%) and Chelon labrosus (0.7%). Although Atherinidae was represented by Atherina boyeri, the contribution rate of this species was quite high (27.3%) of total catches with 1776 of total individuals. Labridae and Gobidae were the next dominant families accounting for 14.2% and 10.8% respectively. The results showed that the fish fauna found is similar to the ichthyofauna of other transitional ecosystems in the Mediterranean

Species diversity and density of Lake Neusiedl as food source for breeding piscivore breediing birds (especially herons) and the imprtance of the reed belt for the fish population.