Results 21 to 30 of about 7,429 (225)

Upper thermal tolerances and vulnerability to global warming in a Brazilian Caatinga fish Astyanax bimaculatus (Linnaeus, 1758) population

Austral Ecology, Volume 47, Issue 6, Page 1157-1161, September 2022., 2022
Abstract Global warming is predicted to increase both average temperatures and the frequency and duration of heat waves. Tropical ectotherms, particularly those living in warm environments are more prone to receive heat impacts. Then, it is crucial to identify those populations already exposed to high temperatures that may be at risk of decimation by ...
Andrés Egea‐Serrano, Maiara C. Alves, M. Solé, M. Tejedo   +3 more
semanticscholar   +2 more sources

Determining management units in southeastern Brazil: the case of Astyanax bimaculatus (Linnaeus, 1758) (Teleostei: Ostariophysi: Characidae). [PDF]

Hydrobiologia, 2018
Made available in DSpace on 2018-06-05T00:38:29Z (GMT). No. of bitstreams: 1 ID276191.pdf: 387781 bytes, checksum: d764bd7c7470fde5aeceabf2fdc37112 (MD5) Previous issue date: 2006-12 ...
DERGAM, J. A., MACHADO, F., PAIVA, S. R.
core   +2 more sources

Autochthonous and allochthonous dietary probiotics mitigate acute stress in Astyanax bimaculatus during transport

Aquaculture Research, 2022
Eduardo da Silva, A. V. Moraes, M. O. Pereira, M. Bittencourt, R. A. Weber, A. Jatobá   +5 more
semanticscholar   +2 more sources

Hydrological Connectivity Enhances Fish Biodiversity in Amazonian Mining Ponds: Insights From eDNA and Traditional Sampling. [PDF]

Mol Ecol
ABSTRACT Artisanal and small‐scale gold mining (ASGM) expansion in the Madre de Dios region of the Peruvian Amazon has transformed primary forests into a novel wetland complex of thousands of abandoned mining ponds. Despite their ecological relevance, post‐mining recovery of these systems remains understudied, particularly regarding fish biodiversity ...
Timana-Mendoza C, Reyes-Calderón A, Venail P, Britzke R, Santa-Maria MC, Araújo-Flores JM, Silman M, Fernandez LE.   +7 more
europepmc   +2 more sources

Competition from sea to mountain: Interactions and aggregation in low-diversity monogenean and endohelminth communities in twospot livebearer Pseudoxiphophorus bimaculatus (Teleostei: Poeciliidae) populations in a neotropical river. [PDF]

Ecol Evol, 2020
The results of this work suggest that interspecific competition can occur in species‐poor, nonsaturated communities among specialist dominant species. Our analyses suggest also that aggregation is an important factor to determine local richness of parasites in fish populations and that intraspecific aggregation allows the coexistence of species in the ...
Salgado-Maldonado G, Caspeta-Mandujano JM, Mendoza-Franco EF, Rubio-Godoy M, García-Vásquez A, Mercado-Silva N, Guzmán-Valdivieso I, Matamoros WA.   +7 more
europepmc   +2 more sources

Morphological and temporal variation in early embryogenesis contributes to species divergence in Malawi cichlid fishes

Evolution &Development, Volume 25, Issue 2, Page 170-193, March 2023., 2023
Lake Malawi cichlids harbor a spectacular intra‐ and interspecific morphological diversity yet understanding of how early in ontogeny species‐specific phenotypes emerge remains limited. A comparative analysis of early development of three divergent Malawi cichlids reveals anatomical and timing differences during embryogenesis and indicates divergence ...
Aleksandra Marconi, Cassandra Zie Yang, Samuel McKay, M. Emília Santos   +3 more
wiley   +1 more source

Identification of Astyanax altiparanae (Teleostei, Characidae) in the Iguaçu River, Brazil, based on mitochondrial DNA and RAPD markers

Genetics and Molecular Biology, 2002
Astyanax fishes are among the most important food-web components of South America rivers. In the Iguaçu River basin, the Astyanax genus is represented mainly by endemic species.
Prioli Sônia M.A.P., Prioli Alberto J., Júlio Jr. Horácio F., Pavanelli Carla S., Oliveira Alessandra V. de, Carrer Helaine, Carraro Dirce M., Prioli Laudenir M.   +7 more
doaj   +3 more sources

Autochthonous and allochthonous lactic acid bacteria: action on the hematological and intestinal microbiota for two species of Astyanax genus

Anais da Academia Brasileira de Ciências, 2022
The objective of this work was to evaluate the effect of autochthonous and allochthonous lactic acid bacteria (LAB) in two species of lambaris (Astyanax bimaculatus and Astyanax fasciatus), and to investigate the effects on intestinal microbiota and ...
ADOLFO JATOBÁ, GABRIEL F.A. JESUS
doaj   +1 more source

Effect of temperature on the growth performance, haematological properties and histomorphology of gill, intestine and liver tissues in juvenile butter catfish Ompok bimaculatus

Aquaculture, Fish and Fisheries, Volume 2, Issue 4, Page 277-286, August 2022., 2022
A 90‐day aquarium trial was conducted to evaluate the effect of temperature on the growth, blood chemistry and histology of vital organs in juvenile Ompok bimaculatus. Fish reared at 30℃ showed significantly higher growth performances, specific growth rate and haemoglobin and white blood cell counts in comparison to the control group at 25℃. Fish at 30℃
Md. Rashedul Islam, Mohammad Amzad Hossain, Farjana Afrose, Nirmal Chandra Roy, Mohammed Mahbub Iqbal   +4 more
wiley   +1 more source

The conundrum of pharyngeal teeth origin: the role of germ layers, pouches, and gill slits

Biological Reviews, Volume 97, Issue 1, Page 414-447, February 2022., 2022
ABSTRACT There are several competing hypotheses on tooth origins, with discussions eventually settling in favour of an ‘outside‐in’ scenario, in which internal odontodes (teeth) derived from external odontodes (skin denticles) in jawless vertebrates. The evolution of oral teeth from skin denticles can be intuitively understood from their location at ...
Ann Huysseune, Robert Cerny, P. Eckhard Witten   +2 more
wiley   +1 more source