Find research datasets worth reusing

Fish species reported to occur in the lake but not recorded in Projet Lac in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report

Fish species reported to occur in the lake but not recorded in Projet Lac

Figure 69 c in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report

Figure 69 c)

Figure 68 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report

Figure 68: Fish from Projet Lac being prepared by museum staff for long-term preservation.

Figure 64 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report

Figure 64: Electrofishing from boat (left) and by wading (right).

Figure 45 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report

Figure 45: Diversity of Salmo spp recorded in Projet Lac.

Figure 69 b in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report

Figure 69 b

Figure 48 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report

Figure 48: The three forms of Salvelinus in Swiss lakes described by Konrad Gessner in 1575.

Figure 57 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report

Figure 57: Extremes of variation in fin colour in Perca fluviatilis within and among lakes.

Figure 60 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report

Figure 60: An example of a littoral habitat map from Lake Bret.

Figure 2 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report

Figure 2: Example of the distribution of sampling actions throughout a lake (Constance Untersee).

opencc-zeroJan 2022View details →

Influence of past and current factors on the beta diversity of coastal lagoon fish communities in South America

Aim: We aimed to assess the relative influence of past (Quaternary paleodrainage characteristics) and current factors on the beta diversity of freshwater fishes in coastal lagoons and explore the main processes involved. Location: Atlantic coast of South America. Taxon: Fishes (173 species) Methods: We built a dataset of species occurrence in 129 lagoons across eight freshwater ecoregions of the world (FEOWs) located between latitudes 0° and 36° and calculated beta diversity (βjac) and its turnover (βjtu) and nestedness (βjne) components. We used a partial Mantel test and multiple regressions on distance matrices to evaluate the importance of past and current factors, and of geographical distance in determining beta diversity. Past variables were those representing the historical freshwater habitat during the last glacial maximum (LGM), and contemporary variables were those related to current habitat. Results: We found high values of βjac within the FEOWs, with βjtu prevailing over βjne. Both past (paleodrainage) and current (drainage area, salinity, and lagoon area) factors affected species dissimilarity (βjac = 46%) and its components (βjtu = 44% and βjne =20%), although explanation was, in part, shared with geographical distance. Individually, the influence of past factors was prevalent in beta diversity and its components. Main Conclusions: The results suggest that major changes in the availability of freshwater habitats and connectivity since the Pleistocene must have affected the colonization, extinction and recolonization processes of fishes along the eastern coast of South America. We suggest that the high beta diversity values may result from limited dispersal after extinctions in the LGM and that the dissimilar freshwater fish communities currently seen were formed mainly by heterogeneous subsets of the regional species pool that persisted in landscape refuges during past sea level increases and then recolonized coastal lagoons.

opencc-zeroFeb 2022View details →

Fish zeta diversity responses to human pressures and cumulative effects across a freshwater basin

Aim: Declining biodiversity across ecosystems and myriad human pressures necessitate high-level regional assessments for effective management. Evaluation of biodiversity patterns and stressor accumulation through beta diversity and cumulative effect analyses are two key methods for management prioritization. This study links these concepts to develop a novel cumulative effect metric based on beta diversity responses. Location: Fraser River basin, British Columbia, Canada. Methods: Multi-Site Generalized Dissimilarity Models were used to evaluate non-linear relationships between fish species compositional differences (ζn, number of shared species across any number of watersheds compared) and human pressure, environmental, and geospatial differences among all watersheds and within low, mid-, and high elevation clusters. A cumulative effect metric was calculated as the sum of response values generated by the model for each human pressure variable specific to each watershed, when evaluated for ζ2 (equivalent to pairwise beta diversity). This metric was tested against the Local Contribution of each watershed to Beta Diversity to determine whether watersheds with unique communities had low cumulative effects and are therefore candidates for conservation, and conversely, whether watersheds with non-distinctive communities had high cumulative effects and warrant restoration. Species Contributions to Beta Diversity were also assessed across the basin. Results: Zeta diversity across low elevation watersheds indicated stronger filtering by human pressures than mid- and high elevations, which showed more stochastic community assembly. The relative importance and response to human pressures varied based on the diversity component (i.e., total diversity including compositional nestedness vs. turnover) and order of zeta (number of watersheds compared). Cumulative effects were negatively related to community uniqueness, supporting the use of these metrics for developing management priorities. Main Conclusions: This assessment contributes to biodiversity conservation efforts by identifying important watersheds, species, and human pressures to manage, as well as providing a cumulative effect metric directly based on biodiversity responses.

opencc-by-4.0Jun 2022View details →

Tunas - Fishing for diverse Answer Sets: a Multi-Shot Trade up Strategy (Tool & Experiments)

Python script to compute diverse answer sets, including examples, logfiles and plots. Requires Python 3.x and clingo 5.4.0+ to run.

opencc-zeroAug 2022View details →

Data for: Stronger niche than dispersal effects on α- and β-diversity of stream algae, insects, and fish across latitudes in the US

Aim: Niche and dispersal processes influence biodiversity, but their relative importance along latitude is unclear. We predicted that: i) niche processes would dominate at high latitudes due to increased climatic stress, consistent with the physiological tolerance hypothesis and the Dobzhansky-MacArthur hypothesis and ii) dispersal limitation would prevail at low latitudes due to narrower niches and smaller range sizes, as postulated by the dispersal-ecological specialization tradeoff hypothesis, the latitude-niche breadth hypothesis, and Rapoport's rule. Location: Central United States Time Period: 1993-2019 Major taxa studied: Stream algae, insects, and fish Methods: We examined the relative effects of environment (climate and physicochemistry) vs. space on stream biodiversity in seven latitudinal zones, spanning 19 latitudinal degrees. In each zone, species richness (α-diversity) was analyzed with multiple regression and variance partitioning. Compositional dissimilarity (β-diversity) within zones was assessed with distance-based RDA and variance partitioning. Results: For α-diversity, latitudinal variability of niche and dispersal processes conformed to our predictions in all three groups, except for dispersal processes in insects. However, the drivers of β-diversity did not follow our predictions. The latitude-niche breadth hypothesis and Rapoport's rule were weakly supported only in fish. Main Conclusions: The importance of niche and dispersal processes varied predictably along the latitudinal gradient only for α-diversity. However, the niche effects were driven mostly by physicochemistry, and the dispersal effects were not always linked with ecological specialization and range size. This suggests that climate-based biodiversity theories do not have particular relevance for the streams in our study. Niche processes had a greater impact than dispersal processes across species groups and diversity metrics, emphasizing the primary role of the environment.

opencc-zeroSep 2022View details →

Feeding habits influence species habitat associations at the landscape scale in a diverse clade of Neotropical fishes

Aim. A primary goal of community ecology is to understand the mechanisms that drive species' spatial distribution and habitat associations. Species' geographic distribution can be influenced by the distribution of their prey partly because consumers' behavior is oriented to optimal energy use during foraging. We analyzed how differences in dietary preferences influence the spatial distribution and habitat associations of species at the landscape scale. We hypothesized that differences in feeding guilds will lead to divergent habitat association patterns among species. Location. Amazon River drainage basin. Taxon. Characiform fishes in the family Serrasalmidae (piranhas and pacus). Methods. We used diet data to classify species into feeding guilds (frugivores, herbivores, piscivores, fin and scale feeders, and planktivores). We used three proxies of habitat association derived from satellite products: floodplain extent, landscape heterogeneity, and flood duration, in three distance buffers. We implemented Phylogenetic Generalized Least Squares models to evaluate the relationship between habitat association and feeding guilds. Results. Frugivores, piscivores, and fin and scale feeders presented similar patterns of habitat associations, with frugivores occupying wider areas of floodplain and greater landscape heterogeneity. Herbivores and planktivores were associated with smaller floodplain extents and lower landscape heterogeneity. All feeding guilds were associated with similar levels of flood duration. Main conclusions. Differences in resource distribution (assessed through feeding guilds) can influence habitat association. Considering the hydrological variability (i.e., floodplain extent) and landscape heterogeneity that characterize floodplains, the patterns of habitat association vary with the spatial scale considered. This work highlights the importance of understanding species habitat associations by fish as well as food resource dynamics and floodplain dependence. This realization is critical for assessing the impact of anthropogenic activities on freshwater ecosystems.

opencc-by-4.0Apr 2024View details →

Data and code from "Temporal allele frequency changes in large-effect loci reveal potential fishing impacts on salmon life-history diversity" (Miettinen et al. 2024)

This archive contains code and data files to perform analyses detailed in Miettinen et al. (2024, Evolutionary Applications, https://doi.org/10.1111/eva.13690).

opencc-by-4.0Jul 2018View details →

Figure 2 in Studies on fish diversity of the Mahi River, Rajasthan State

Figure 2. Area of study.

opencc-by-4.0Jul 2018View details →

Figure 1 in Studies on fish diversity of the Mahi River, Rajasthan State

Figure 1. Chart showing order wise composition of fish species.

opencc-zeroJun 2024View details →

Data from: Responses of population structure and genomic diversity to climate change and fishing pressure in a pelagic fish

The responses of marine species to environmental changes and anthropogenic pressures (e.g. fishing) interact with ecological and evolutionary processes that are not well understood. Knowledge of changes in the distribution range and genetic diversity of species and their populations into the future is essential for the conservation and sustainable management of resources. Almaco jack (Seriola rivoliana) is a pelagic fish with high importance to fisheries and aquaculture in the Pacific Ocean. In this study, we assessed contemporary genomic diversity and structure in loci that are putatively under selection (outlier loci) and determined their potential functions. Utilizing a combination of genotype-environment association, spatial distribution models, and demogenetic simulations, we modeled the effects of climate change (under three different RCP scenarios) and fishing pressure on the species' geographic distribution and genomic diversity and structure to 2050 and 2100. Our results show that most of the outlier loci identified were related to biological and metabolic processes that may be associated with temperature and salinity. Contemporary genomic structure showed three populations—two in the Eastern Pacific (Cabo San Lucas and Eastern Pacific) and one in the Central Pacific (Hawaii). Future projections suggest a loss of suitable habitat and potential range contractions for most scenarios, while fishing pressure decreased population connectivity. Our results suggest that future climate change scenarios and fishing pressure will affect the genomic structure and genotypic composition of S. rivoliana and lead to loss of genomic diversity in populations distributed in the eastern-central Pacific Ocean, which could have profound effects in fisheries that depend on this resource.