Results 51 to 60 of about 14,954 (263)
Genetics and Molecular Biology, 2012 The fish genus Astyanax is widespread throughout the Neotropical region and is one of the most species-rich genera of the Characiformes. Cytogenetic studies of Astyanax have revealed marked intra-and interspecific diversity, with the identification of ...
Aline Souza Medrado +4 more
doaj
Three new species of Astyanax from drainages of southern Brazil (Characiformes: Characidae)
Neotropical IchthyologyThree new species of Astyanax are described from southern Brazil: A. dissensus and A. xiru from the laguna dos Patos system and rio Uruguay basin, the first species also occurring in the rio Tramandaí system, and A.
Carlos A. S. de Lucena +2 more
doaj +1 more source
Teleosts as Models for Epigenetic Inheritance
Molecular Ecology, Volume 35, Issue 5, March 2026.ABSTRACT Teleost fish exhibit a striking divergence from mammals in how they regulate their epigenome. Unlike mammals, they do not undergo the extensive DNA methylation erasure and resetting events that occur during early embryogenesis, germline specification, and spermatogenesis.
Adauto Lima Cardoso, Ozren Bogdanovic
wiley +1 more source
Cryptic Variation in Morphological Evolution: HSP90 as a Capacitor for Loss of Eyes in Cavefish [PDF]
, 2013 In the process of morphological evolution, the extent to which cryptic, preexisting variation provides a substrate for natural selection has been controversial. We provide evidence that heat shock protein 90 (HSP90) phenotypically masks standing eye-size
Borowsky, R. L. +7 more
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Ocular Morphology and Clinical Ophthalmic Parameters of Nile Tilapia Oreochromis niloticus
Veterinary Ophthalmology, Volume 29, Issue 2, March 2026.ABSTRACT Objective To describe the ocular morphological characteristics and establish clinical and ophthalmic reference standards for Nile tilapia. Animals Studied Fresh carcasses were used for diaphanization, optical and electron microscopy, and computed tomography analyses.
Dandara Franco Ferreira da Silva +12 more
wiley +1 more source
EVOLUTION OF THE CIRCADIAN CLOCK IN EXTREME ENVIRONMENT: LESSONS FROM CAVEFISH. [PDF]
, 2010 Evolution has been strongly influenced by the daily cycles of temperature and light imposed by the rotation of the Earth. Fascinating demonstrations of this are seen in extreme environments such as caves where some animals have remained completely ...
Cavallari, Nicola
core
Ictiofauna epígea e subterrânea na área cárstica da Serra do Ramalho, nordeste brasileiro, com listas de peixes troglóbios e troglófilos no Brasil [PDF]
, 2008 After an ichthyofaunistic survey in several epigean (surface) water bodies of the Serra do Ramalho, southern Bahia, conducted in May 2007, 44 species were recorded; in addition, three non-troglomorphic (normally eyed and pigmented) and two troglomorphic ...
BICHUETTE, Maria Elina +3 more
core +1 more source
Bat Migration Intensifies Cave Fish Richness Loss Under Climate Change in China
Diversity and Distributions, Volume 32, Issue 2, February 2026.ABSTRACT Aim Cave fish, the largest aquatic vertebrates in karst ecosystems, rely heavily on bat guano as a nutrient source. However, ongoing environmental change is degrading cave habitats and altering bat distributions. This study aims to assess how climate‐driven bat migration affects cave fish distributions in China, providing insights for ...
Xiongfeng Bai +6 more
wiley +1 more source
Neotropical IchthyologyTetragonopoterus aeneus Hensel (1870) is removed from synonymy with Astyanax fasciatus (Cuvier, 1819), revalidated and redescribed as A. henseli to avoid homonymy. Astyanax henseli differs from A. fasciatus stricto sensu and other Astyanax species by the
Filipe A. G. de Melo, Paulo A. Buckup
doaj +1 more source
Genetics and Molecular Biology, 2008 Chromosomal analyses were performed in the fish Astyanax sp.D collected from three different points: two streams from the right bank and one from the left bank of the Upper Iguaçu River, Paraná State, Brazil.
Daniel Luis Zanella Kantek +5 more
doaj +1 more source