Results 11 to 20 of about 1,803 (189)

Sex Determination in Sponges. [PDF]

Mol Reprod Dev
ABSTRACT Sex determination in Porifera remains one of the least understood aspects of early metazoan biology despite the group's key phylogenetic position. Sponges display exceptional diversity in sexual systems—ranging from stable gonochorism to sequential hermaphroditism and sex reversal—yet lack morphological dimorphism and any discrete gonadal ...
Lorente-Sorolla JM, Riesgo A.
europepmc   +2 more sources

Promiscuous speciation with gene flow in silverside fish genus Odontesthes (Atheriniformes, Atherinopsidae) from south western Atlantic Ocean basins. [PDF]

PLoS ONE, 2014
The present paper integrates phylogenetic and population genetics analyses based on mitochondrial and nuclear molecular markers in silversides, genus Odontesthes, from a non-sampled area in the SW Atlantic Ocean to address species discrimination and to ...
Graciela García, Néstor Ríos, Verónica Gutiérrez, Jorge Guerra Varela, Carmen Bouza Fernández, Belén Gómez Pardo, Paulino Martínez Portela   +6 more
doaj   +2 more sources

Shearing Tooth Morphology May Allow Sharks to Access Higher Trophic Levels at Smaller Sizes. [PDF]

Ecol Evol
Predator morphology imposes limitations on prey selection due to biomechanical constraints, making some prey functionally inaccessible and thereby constraining predator trophic niches. We assessed how two key components of trophic morphology—tooth shape and body size—affect prey selectivity and trophic niche in two sympatric sharks with contrasting ...
Riverón S, Raoult V, Slip DJ, Mas F, Laporta M, Pereyra I, Silveira S, Harcourt RG.   +7 more
europepmc   +2 more sources

Specific testicular morphology in the atherinomorphOdontesthes nigricans(Richardson, 1848): a comparison with the sympatric speciesOdontesthes smitti(Lahille, 1929) [PDF]

Journal of Applied Ichthyology, 2009
In teleosts, testis organization can be classified in different morphological categories (Grier, 1993; Grier and Parenti, 1994). While primitive osteichthyans show anastomosed tubular testes, the derived teleost species (sensu Parenti and Grier, 2004) present one of two principal morphologies according to the type of distribution of spermatogonia ...
Morriconi, Elba Rosa, Lattuca, María Eugenia, Boy, Claudia Clementina, Calvo, Jorge   +3 more
openaire   +3 more sources

Evaluation of Reference Genes to Analyze Gene Expression in Silverside Odontesthes humensis Under Different Environmental Conditions

Frontiers in Genetics, 2018
Some mammalian reference genes, which are widely used to normalize the qRT-PCR, could not be used for this purpose due to its high expression variation. The normalization with false reference genes leads to misinterpretation of results.
Tony L. R. Silveira, William B. Domingues, Mariana H. Remião, Lucas Santos, Bruna Barreto, Ingrid M. Lessa, Antonio Sergio Varela Junior, Diego Martins Pires, Carine Corcini, Tiago Collares, Fabiana K. Seixas, Ricardo B. Robaldo, Vinicius F. Campos   +12 more
doaj   +2 more sources

Diets of Three Sympatric Grebe Species in Lake Titicaca Indicate Possible Dietary Niche Partitioning. [PDF]

Ecol Evol
Lake Titicaca is home to three grebe species whose diets have not been thoroughly studied. In this natural history note, we provide the first description of the diets of these species and how they overlap and differentiate. ABSTRACT Dietary niche partitioning is a fundamental process in community ecology, of interest to both conservationists and ...
Villar DA, Yanes E, Gutiérrez Tito ER, Gosler AG.   +3 more
europepmc   +2 more sources

El “Pejerrey argentino” Odontesthes bonariensis: recomendaciones para su manejo sostenible en el Perú [PDF]

South Sustainability, 2022
El presente trabajo tiene como objetivo generar recomendaciones acerca del estado actual de Odontesthes bonariensis (pejerrey argentino) en el Perú. Considerando aspectos de su biología reproductiva, se sugiere la implementación de una escala de madurez
Lorena Bobbio-Velarde
doaj   +2 more sources

Identificação de loci microssatélitescom potencial de amplificação na espécie de Peixe-Rei (Odontesthes humensis)

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2014
In this work, 25,806 potentially amplifiable microsatellite loci (PAL) were identified in pejerrey, (Odontesthes humensis), with 21% of dinucleotide, 22% trinucleotide, 37% tetranucleotide, 13% pentanucleotide and 7% hexanucleotide.
R.A. Tavares, S.R.N. Piedras, M.D. Nunes, D.B. Almeida, C.G.A. Moreira, J.M. Fernandes, S.F. Freitas, H.L.M. Moreira, J.L.O.F. Pouey, N.J.L. Dionello   +9 more
doaj   +2 more sources

Odontesthes yucuman Wingert, Ferrer & Malabarba 2017

, 2018
Published as part of Bertaco, Vinicius A. & Azevedo, Marco A., 2018, Type catalog from the fish collection of the Museu de Ciências Naturais, Fundação Zoobotânica do Rio Grande do Sul, Brazil, pp.
Bertaco, Vinicius A., Azevedo, Marco A.
openaire   +3 more sources

The Duplicated Y-specific amhy Gene Is Conserved and Linked to Maleness in Silversides of the Genus Odontesthes. [PDF]

Genes (Basel), 2019
Sex-determining genes have been successively isolated in several teleosts. In Odontesthes hatcheri and O. bonariensis, the amhy gene has been identified as a master sex-determining gene.
Hattori RS, Somoza GM, Fernandino JI, Colautti DC, Miyoshi K, Gong Z, Yamamoto Y, Strüssmann CA.   +7 more
europepmc   +2 more sources