New records of freshwater fish for Uruguay

Zarucki, Matías; González‐Bergonzoni, Ivan; Mello, Franco Teixeira de; Duarte, Alejandro; Serra, Sebastián; Quintans, Federico; Loureiro, Marcelo

doi:10.15560/6.2.191

Cited by 10 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Austrolebias elongatus is distributed in the lower Paraná and some localities in the eastern and western drainages of the lower Uruguay River, whereas A. nigripinnis and the A. robustus species complex are distributed in both the lower Paraná and lower Uruguay rivers (Costa, 2006). A recent report on non‐annual freshwater fish species from the Uruguay River also indicates a high level of connection between the LPP and LU–MU drainages (Zarucki et al. , 2010).…”

Section: Discussionmentioning

confidence: 99%

Patterns of population differentiation in annual killifishes from the Paraná–Uruguay–La Plata Basin: the role of vicariance and dispersal

García

Gutiérrez

Vergara

et al. 2012

Journal of Biogeography

Self Cite

View full text Add to dashboard Cite

Aim To elucidate the role of vicariance versus dispersal at the microevolutionary scale in annual killifish populations belonging to the Austrolebias bellottii species complex (Rivulidae). Within this complex, A. bellottii and A. apaii have low vagility and occur widely within the study area, making them excellent models for testing biogeographic hypotheses of differentiation. Location South America, in the Paraná–Uruguay–La Plata river basin. Methods Molecular data and morphometric analyses were used to reconstruct the phylogeographic history and morphological variation of 24 populations of two taxa of the A. bellottii species complex. Phylogenetic analyses using maximum likelihood (ML) and Bayesian inference (BI) model‐based methods, estimates of clade divergence times implemented in beast, non‐metric multidimensional scaling, analysis of molecular variance results, and morphological analyses elucidated the role of vicariance versus dispersal hypotheses in population differentiation in the aforementioned river basin. Results In the A. bellottii species complex from the Paraná–Uruguay–La Plata river basin, past allopatric fragmentation from vicariance events seems to be the most plausible scenario for diversification since the Late Miocene and more recently since the Plio‐Pleistocene. The Plio‐Pleistocene vicariance produced the differentiation of three major clades in A. bellottii populations. One clade from the eastern Uruguay River drainage was separated from another in western Uruguay and the Paraná–La Plata River drainages. A later vicariance event split populations to the south (lower Paraná–La Plata Basin) and north (middle Paraná) of the western Paraná River drainage. However, our results do not exclude the possibility of dispersal events among A. bellottii populations from both the Uruguay and Paraná river drainages, which could occur in these river basins during hypothesized connectivity cycles of the Late Pliocene and Pleistocene. Main conclusions Past allopatric fragmentation caused by different vicariance events seems to be the main driver of diversification in the A. bellottii species complex since the Plio‐Pleistocene. However, the current molecular data suggest that populations from both drainages of the Paraná–Uruguay rivers may have experienced cycles of connectivity during the Pleistocene, perhaps including multiple vicariance or dispersal events from populations located in the western lower Uruguay River drainage, which encompassed climatic and geological changes in the Paraná–Uruguay–La Plata Basin.

show abstract

Section: Discussionmentioning

confidence: 99%

Patterns of population differentiation in annual killifishes from the Paraná–Uruguay–La Plata Basin: the role of vicariance and dispersal

García

Gutiérrez

Vergara

et al. 2012

Journal of Biogeography

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Cuareim River is a low-gradient piedmont stream that drains southern Brazil and northern Uruguay and is a major tributary of the middle Uruguay River. The fish community is diverse and representative of the Uruguay River basin (Zarucki et al ., 2010;Serra et al ., 2011). Consumer biomass is primarily supported by algal carbon and Crenicichla are mesopredators in this system (Burress et al ., 2013a).…”

Section: Methodsmentioning

confidence: 99%

Species‐specific ontogenetic diet shifts among NeotropicalCrenicichla: using stable isotopes and tissue stoichiometry

Burress

Duarte²,

Serra³

et al. 2013

Journal of Fish Biology

View full text Add to dashboard Cite

Ontogenetic diet shifts were compared among five sympatric pike cichlids Crenicichla in a subtropical South American stream using stable C and N isotopes and tissue stoichiometry (C:N). Within species, stable N isotopes were positively related to body size while C:N showed negative relationships. Stable C isotopes, however, were not related to body size in any species. By modelling the switch to piscivory using gut content-isotope-body size relationships, diet shifts were shown to be species-specific with regard to both rate and degree of piscivory. Compared to other piscivorous lineages, Crenicichla appear to be unusually small-bodied (based on maximum body size). Because of their diversity, abundance and dynamic size-structured functional roles, Crenicichla may exert broad and complex predation pressures on the aquatic community.

show abstract

“…The Rio Cuareim drains south-western Brazil and north-western Uruguay and is a major tributary to the middle Rio Uruguay. The Rio Cuareim is a fifth-order, clear-water piedmont river characterized by cobble substrates and diverse and highly endemic fish communities (Lucena & Kullander 1992;Zarucki et al 2010;Serra et al 2011;E. The Rio Cuareim is a fifth-order, clear-water piedmont river characterized by cobble substrates and diverse and highly endemic fish communities (Lucena & Kullander 1992;Zarucki et al 2010;Serra et al 2011;E.…”

Section: Study Sitementioning

confidence: 99%

“…The surrounding physiographic region is arid, subtropical prairie (Iriondo 1999;Brea & Zucol 2011). The Rio Cuareim is a fifth-order, clear-water piedmont river characterized by cobble substrates and diverse and highly endemic fish communities (Lucena & Kullander 1992;Zarucki et al 2010;Serra et al 2011;E. D. Burress, pers.…”

Section: Study Sitementioning

confidence: 99%

“…Subtropical South American drainages support diverse fish assemblages and display comparatively high degrees of endemism and cryptic diversity (Lucena & Kullander 1992;Pialek et al 2011;Rican et al 2011). Yet, species boundaries, community composition and ecological roles of many subtropical South American fishes are poorly known, and our understanding of food web structure in these streams is extremely limited (Zarucki et al 2010;Serra et al 2011).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Isotopic trophic guild structure of a diverse subtropical South American fish community

Burress

Duarte²,

Gangloff

et al. 2012

Ecology of Freshwater Fish

Self Cite

View full text Add to dashboard Cite

Characterization of food web structure may provide key insights into ecological function, community or population dynamics and evolutionary forces in aquatic ecosystems. We measured stable isotope ratios of 23 fish species from the Rio Cuareim, a fifth-order tributary of the Rio Uruguay basin, a major drainage of subtropical South America. Our goals were to (i) describe the food web structure, (ii) compare trophic segregation at trophic guild and taxonomic scales and (iii) estimate the relative importance of basal resources supporting fish biomass. Although community-level isotopic overlap was high, trophic guilds and taxonomic groups can be clearly differentiated using stable isotope ratios. Omnivore and herbivore guilds display a broader d 13 C range than insectivore or piscivore guilds. The food chain consists of approximately three trophic levels, and most fishes are supported by algal carbon. Understanding food web structure may be important for future conservation programs in subtropical river systems by identifying top predators, taxa that may occupy unique trophic roles and taxa that directly engage basal resources.

show abstract

New records of freshwater fish for Uruguay

Cited by 10 publications

References 0 publications

Patterns of population differentiation in annual killifishes from the Paraná–Uruguay–La Plata Basin: the role of vicariance and dispersal

Patterns of population differentiation in annual killifishes from the Paraná–Uruguay–La Plata Basin: the role of vicariance and dispersal

Species‐specific ontogenetic diet shifts among NeotropicalCrenicichla: using stable isotopes and tissue stoichiometry

Isotopic trophic guild structure of a diverse subtropical South American fish community

Contact Info

Product

Resources

About