Results 161 to 170 of about 4,359 (190)
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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
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Cephalic morphological variation in freshwater silversides Odontesthes hatcheri and Odontesthes bonariensis in Patagonia: introgression and ecological relationships [PDF]
Journal of Fish Biology, 2013 Based on geometric morphometrics and discriminant analysis, the percentage of silverside Odontesthes hatcheri and Odontesthes bonariensis individuals identified by a taxonomic key and misclassified by discriminant analysis was obtained and a negative ...
Víctor E. Cussac, Sonia A Crichigno
exaly +2 more sources
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
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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
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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
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Atrazine alters early sexual development of the South American silverside, Odontesthes bonariensis
Aquatic Toxicology, 2023Atrazine (ATZ) is a frequent contaminant in freshwater ecosystems within agricultural regions. The capacity of this herbicide to interfere with the vertebrate endocrine system is broadly recognized, but the mechanisms and responses usually differ among species. In this study, ATZ effects on hypothalamus-pituitary-gonadal (HPG) axis key genes expression
Carriquiriborde, Pedro +7 more
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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
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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
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.
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Benzocaine and clove oil as anesthetics for pejerrey (Odontesthes bonariensis) fingerlings [PDF]
Arquivo Brasileiro De Medicina Veterinaria E Zootecnia, 2013 Pejerrey (Odontesthes bonariensis) is a native species from Rio Grande do Sul, Uruguay and Argentina where it is of great economic importance for artisanal fishing. One difficulty in laboratory research with pejerrey is related to its sensitivity, as it presents higher basal cortisol levels than other freshwater species.
Morato-Fernandes, J. +4 more
exaly +5 more sources
Digestive enzyme activities during pejerrey (Odontesthes bonariensis) ontogeny
Aquaculture, 2020info:eu-repo/semantics ...
Pérez Sirkin, Daniela Irina +7 more
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