Results 191 to 200 of about 4,014 (216)
Some of the next articles are maybe not open access.
Androgen synthesis in the silverside Odontesthes bonariensis
2008Though it is generally accepted that steroids are able to affect the sex ratio in many teleost species, the role of androgens in the sex determination/differentiation process in fish species with temperature-dependent sex determination systems (TSD) has not been established.
Blasco, Martín +2 more
openaire +1 more source
Genetica, 2021
Silversides are a widely distributed group across South America, with several species occupying marine, freshwater and estuarine environments. Several authors suggest main transitions among these environments took place during Pleistocene, and were accompanied with rapid speciation events.
Javier, Calvelo, Alejandro, D'Anatro
openaire +2 more sources
Silversides are a widely distributed group across South America, with several species occupying marine, freshwater and estuarine environments. Several authors suggest main transitions among these environments took place during Pleistocene, and were accompanied with rapid speciation events.
Javier, Calvelo, Alejandro, D'Anatro
openaire +2 more sources
Pejerrey Odontesthes bonariensis
2017Pejerrey Odontesthes bonariensis was reared in the recirculation system for 1 year. The system consisted of two particle-trap equipped octagonal tanks (0.75 m3) for the rapid collection of feces and uneaten feed, a mechanical filter, a UV unit, a biological filter which provided nitrification, and a hollow-fiber oxygen injection system.
openaire +1 more source
Female reproductive biology of the silverside Odontesthes regia
Fisheries Research, 2011Abstract Histological observations of gonads, size frequency distribution of oocytes, seasonal changes in the gonadosomatic index and fecundity were used to assess the reproductive biology of females of the silverside Odontesthes regia from October 2006 to November 2007 in southern Chile. Six developmental stages were characterised as a function of
Guido Plaza +3 more
openaire +1 more source
The role of amides in seminal cryopreservation of wild silverside, Odontesthes bonariensis
Cryobiology, 2016Amides were tested as internal cryoprotectants for the preservation of wild silverside (Odontesthes bonariensis) sperm. The semen was diluted in modified Mounib's medium and cryopreserved by adding 2, 5, 8 or 11% of dimethyl acetamide (DMA), dimethyl formamide (DMF) or methyl formamide (MF).
Juliana P. Alves +7 more
openaire +2 more sources
The complete mitochondrial genome ofOdontesthessp. (Atheriniforms, Atherinopsidae)
Mitochondrial DNA, 2014In this study, the complete mitochondrial genome of Odontesthes sp. has been studied first. The genome is 16,528 bp in length and contains 13 protein-coding genes, 22 tRNA genes, 2 ribosomal RNA genes and 1 putative control region. The mitochondrial genome of Odontesthes sp.
Tao, Wei, Ge, Shi, Rixin, Wang
openaire +2 more sources
Effects of Hypoxia on the Reproductive Endocrine Axis of the Pejerrey (Odontesthes Bonariensis)
Fish Physiology and BiochemistryRecently, hypoxic areas have been identified in water bodies of the Pampas region due to human activity. The objective of this work was to study the effect of low concentrations of dissolved oxygen (hypoxia) on the reproductive endocrine axis of a pampas fish (Odontesthes bonariensis). Groups of 8 males and 8 females were subjected to severe hypoxia (2-
Carina Gisele Quesada +1 more
openaire +3 more sources
Sex differentiation and hormonal feminization in pejerrey Odontesthes bonariensis
Aquaculture, 1996Abstract An investigation was conducted on the histological process of gonadal sex differentiation and the suitability of steroid hormone administration for sex control in pejerrey, Odontesthes bonariensis . Light histological examination of the gonads of larvae and juvenile fish revealed that the primordial gonads were already formed at hatching ...
Carlos Augusto Strüssmann +2 more
openaire +1 more source
Effects of a glyphosate-based herbicide in pejerrey Odontesthes humensis embryonic development
Chemosphere, 2017Glyphosate-based herbicides (GBH) are the major pesticides used worldwide. Among them, the Roundup formulations are the most popular. Some aspects of GBH toxicity are well known, such as induction of oxidative stress. However, embryotoxicity is scarcely known.
Yuri Dornelles, Zebral +6 more
openaire +2 more sources
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2014
The goal of this study was to evaluate the essential components controlling the brain-pituitary-gonad axis during pejerrey (Odontesthes bonariensis) oogenesis in the wild. Ovarian developmental stages from vitellogenesis up to ovulation were associated with increasing day length and water temperatures below 21°C (winter and beginning of spring ...
Elisio, Mariano +2 more
openaire +3 more sources
The goal of this study was to evaluate the essential components controlling the brain-pituitary-gonad axis during pejerrey (Odontesthes bonariensis) oogenesis in the wild. Ovarian developmental stages from vitellogenesis up to ovulation were associated with increasing day length and water temperatures below 21°C (winter and beginning of spring ...
Elisio, Mariano +2 more
openaire +3 more sources