Results 31 to 40 of about 7,373 (259)
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 +7 more
europepmc +2 more sources
Histological and Histometric Evaluation of the Liver in Astyanax Bimaculatus (Teleostei: Characidae), Exposed to Different Concentrations of an Organochlorine Insecticide [PDF]
The Anatomical Record, 2015 Lucas Marcon +3 more
openalex +2 more sources
, 2008 O objetivo deste trabalho foi avaliar a influência da densidade de estocagem sobre o desenvolvimento de juvenis de lambari (Astyanax bimaculatus), em tanques-rede, em sua fase inicial. Foram utilizados 300 peixes, com peso vivo inicial médio com quatro tratamentos e seis repetições. Foram utilizadas as densidades de 31, 62, 93 e 124 peixes/m3 .
Cristiane Vilela, Carmino Hayashi
openalex +3 more sources
Highlighting Astyanax Species Diversity through DNA Barcoding [PDF]
PLoS ONE, 2016 Bruno Cesar Rossini +2 more
exaly +2 more sources
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 +3 more
wiley +1 more source
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. +7 more
doaj +3 more sources
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 +4 more
wiley +1 more source
Histological alterations in liver and testis of Astyanax aff. bimaculatus caused by acute exposition to zinc [PDF]
Revista Ceres, 2015 This study investigated the effect of acute exposition to zinc (Zn) on histology of the liver and testes of yellow tail lambari (Astyanax aff. bimaculatus). The exposure consisted of six concentrations of Zn (0, 3, 5, 10, 15, and 20 mg/L) for 96 hours of exposure.
Daiane Cristina Marques dos Santos +4 more
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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 +2 more
wiley +1 more source