A5043003946- Fish biology, ecology, and behavior
- Fish Biology and Ecology Studies
- Fish Ecology and Management Studies
- Genetic diversity and population structure
- Identification and Quantification in Food
- Ichthyology and Marine Biology
- Marine Bivalve and Aquaculture Studies
- Business, Innovation, and Economy
- Evolution and Paleontology Studies
- Isotope Analysis in Ecology
- Coral and Marine Ecosystems Studies
- Mercury impact and mitigation studies
- Environmental and Cultural Studies in Latin America and Beyond
- Chromosomal and Genetic Variations
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Environmental and Ecological Studies
- Conservation, Biodiversity, and Resource Management
- Higher Education and Sustainability
- Morphological variations and asymmetry
- Plant and soil sciences
- Animal Genetics and Reproduction
- Amphibian and Reptile Biology
- Lepidoptera: Biology and Taxonomy
Instituto Nacional de Biodiversidad
2014-2025
National Biodiversity Institute
2017-2025
Universidad Internacional SEK
2017
Abstract The Amazon Basin is an unquestionable biodiversity hotspot, containing the highest freshwater on earth and facing off a recent increase in anthropogenic threats. current knowledge spatial distribution of fish species greatly deficient this basin, preventing comprehensive understanding hyper-diverse ecosystem as whole. Filling gap was priority transnational collaborative project, i.e . AmazonFish project - https://www.amazon-fish.com/ Relying outputs we provide most complete records...
Identifying the main taxonomic, phylogenetic and trait dimensions of beta diversity, evaluating their prospective drivers, advances our understanding patterns processes involved in evolution biological assemblages. Using comprehensive databases on distribution, phylogeny, morphological traits (later referred as functional traits) Amazonian freshwater fishes, we analyzed diversity these three to evaluate historical contemporary drivers. We mostly focused pure turnover components (Taxoβsim,...
Despite limited access and rather deficient sampling in many lowland areas of eastern Ecuador, scientists have been able to demonstrate that this specific region Amazonia houses extraordinarily high concentrations species within several taxa – terrestrial aquatic, plant animal, vertebrate invertebrate. In work, we developed an updated list the ichthyofauna Yasuní National Park (YNP), based on extensive literature review databases most representative ichthyological collections from Ecuador....
The escalating industrial and artisanal extraction of natural resources in the Amazon Basin has centered it into spotlight global environmental concern. This study deals with problems heavy metals pollution biomagnification, which stem from mining, agricultural, petrochemical, discharges. We conducted an extensive investigation, analyzing 360 fish specimens representing 58 species, to assess concentrations 11 (Al, As, Cd, Cr, Cu, He, Mn, Ni, Pb, Zn, Hg) along Ecuadorian sections Napo Pastaza...
Neotropical mountain streams are important contributors of biological diversity. Two species the characid genus Rhoadsia differing for an ecologically morphological trait, body depth, have been described from western slopes Andes in Ecuador. altipinna is a deeper-bodied reported low elevations southwestern Ecuador and northern Peru, minor more streamlined that was high (>1200 m) Esmeraldas drainage northwestern Little known about these their validity as distinct has questioned. In this...
Background The lack of barriers in the marine environment has promoted idea panmixia organisms. However, oceanographic conditions and habitat characteristics have recently been linked to genetic structure species. Tropical Eastern Pacific (TEP) is characterized by dynamic current systems heterogeneous conditions. Gulf Panama (part equatorial segment for TEP) influenced a complex system environment, which shown limit gene flow shoreline Next Generation Sequencing (NGS) contributed detect...
ABSTRACT A new species of catfish is described from the Esmeraldas River Basin, Pacific slope, northern Ecuador. Tentatively included in Microglanis, represents second genus inhabiting Trans-Andean region. The distinguished known congeners by a unique combination external characteristics: head and body color pattern, uniform, pale brown, yellowish or grayish, without any kind blotches, bands dots, only lunate transverse band, dark black, at caudal-fin origin; adipose-fin origin forward...
The Tropical Indo-Pacific (TIP) includes about two thirds of the world’s tropical oceans and harbors an enormous number marine species. distributions those species within region is affected by habitat discontinuities oceanographic features. As well as many smaller ones, TIP contains seven large recognized biogeographic barriers that separate Red Sea Indian Ocean, from Pacific central eastern Pacific, Hawaiian archipelago, Marquesas Easter Islands. We examined genetic structuring populations...
Vertebral number is adaptively important in fishes and associated with body shape at broad taxonomic ranks. Less known about this association within species. Rhoadsia a deep-bodied characid genus endemic to western Ecuador northwestern Peru. It includes two species differing depth (BD), described from different drainages elevations. Recently, BD has been found vary elevation parallel between ~30 1260 m across Ecuador. Here, we report that vertebral also covaries shape. The latter was present...
The leucismo is an aberration in pigmentation, resulting from a genetic abnormality and occurs all vertebrate groups which the fish are included. In Ecuador, it has not reported such anomalies fish. Is presented for first time case of partial individual Andean Catfish (Astroblepidae), observed spring located near Lake San Pablo Canton Otavalo, Imbabura Province, Ecuador.
The plecos (Loricariidae) fish represent a great model for cytogenetic investigations due to their variety of karyotypes, including diploid and polyploid genomes, different types sex chromosomes. In this study we investigate Transancistrus santarosensis rare loricariid endemic Ecuador, integrating methods with specimens' molecular identification by mtDNA, describe the species karyotype. We aim verify whether chromosomes are cytologically identifiable if they associated accumulation...
An annotated list of the freshwater fishes Limoncocha Lagoon, in Biological Reserve northern Amazon region Ecuador is presented. Fishes were captured between March and July 2012, we combined these results with previous studies to provide a comprehensive Reserve. Thirty-three species belonging 14 families distributed 7 orders collected. The most representative number specimens Characiformes, Siluriformes, Perciformes, respectively, being Characiformes as important terms richness abundance...
Threatened shark species are caught in large numbers by artisanal and commercial fisheries traded globally. Monitoring both which sold fisheries, the export of CITES-restricted products, essential reducing illegal fishing. Current methods for identification rely on visual examination experts or DNA barcoding techniques requiring specialist laboratory facilities trained personnel. The need equipment and/or input from means many markets currently not monitored. We have developed a paper-based...
Astroblepus species, commonly known as Andean climbing catfish, exhibit a unique challenge in species delimitation, leading to ongoing taxonomic debates. Here we report data on mindoensis, vulnerable endemic Ecuador, obtained by an integrative approach that includes cytogenetic analysis, molecular identification of the specimens, and recording morphological morphometric characters useful for diagnosis. Thus, this study aimed associate karyotype specimens analyzed with characters, improving...
We report collections of several specimens Sicydium in 2013 and 2014 from the Jubones Santa Rosa Rivers southwestern Ecuador. These substantially expand known range genus southward. The are tentatively identified as cf. rosenbergii based on their morphology. Small differences morphology among two rivers noted, discrepancies with type description. A museum database search uncovered additional records south previously recognized including one record northwestern Peru.
South America's Chocó, part of the North Andean Pacific Slopes–Rio Atrato ecoregion, is a biodiversity hotspot with many disjunct rivers, yet phylogeographic and population genetic studies Chocó's aquatic species are scarce. Rhoadsia Chocó endemic freshwater fish genus two recognized species: R. minor from upper Esmeraldas River drainage altipinna lower Guayas drainage, Ecuador. Little known about evolutionary history Rhoadsia, due to morphological similarities, validity nominal has been...
A review of the species genus Mylossoma Eigenmann & Kennedy, 1903 found in Ecuadorian Cis-Andean region was conducted. Two were recognized: M. albiscopum (Cope, 1872) from Putumayo, Napo, and Tigre river basins and aureum (Agassiz, 1829) Napo basin. map geographical distribution and radiographs for both are provided. Historical records duriventre (Cuvier, 1818) not confirmed in this distribution.
Relative fecundity in fishes is the estimated number of oocytes a female during spawning. This aspect was investigated Grundulus quitoensis topotypic specimens from El Voladero, high Andean lake Ecuador. Gonad maturation stages (mature and immature) were identified by means direct observation, subsequently, relative fertility (FRP) as function weight total lenght (TL) calculated.
Los estudios sobre hábitos alimentarios de comunidades acuáticas ayudan a entender cómo estas interactúan, y considerando que los peces páramo han sido muy poco investigados, se analizó la dieta contribuyó al entendimiento ecología trófica Grundulus quitoensis, especie endémica andes del Ecuador. Se estudió el contenido estomacal 26 ejemplares laguna El Voladero. identificaron doce categorías presa, las cuales, género Bosmina (Crustacea: Cladocera) (Ni = 2410; Fo 22) entidades familia...
Hemigrammus unilineatus (Gill, 1858) (Characidae) is rediscovered in Yasuní National Park, eastern Ecuador, where it has not been reported since 1987. We present a detailed taxonomic description, including measurements and photographs, as well distribution map of this species Ecuador. Based on our new evidence, we confirm the presence H. Ecuadorian Amazon.