Consulta: subjectFacets:"Sperm quality"
Registros recuperados: 7
Data/hora: 11/06/2024 01:24:22

Seasonal variation of sperm quality in Pacific oyster (Crassostrea gigas)
Provedor de dados: 5
Autores: Suquet, Marc; Malo, Florent; Queau, Isabelle; Ratiskol, Dominique; Quere, Claudie; Le Grand, Jacqueline; Fauvel, Christian.
Seasonal changes of sperm quality which can affect sperm biological parameters throughout the breeding period, have been little studied in mollusc species. Controlling gamete quality would aid the management of gametes in hatcheries and the development of selection programs. The aim of the present study was to describe the changes in sperm quality of wild Pacific oysters through the spawning season by comparing sperm parameters at the beginning (May), middle (July) and end (October) of this period using a panel of bio-descriptors. These parameters were studied over the 2014 breeding season based on shed sperm collected after serotonin injection of wild breeders. A significantly higher percentage of motile sperm was observed at the end of the spawning...
Tipo: Text
Palavras-chave: Crassostrea gigas; Sperm quality; Sperm ageing; Season; Motility.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00346/45690/45310.pdf

Are coping styles consistent in the teleost fish Sparus aurata through sexual maturation and sex reversal?
Provedor de dados: 5
Autores: Castanheira, Maria Filipa; Paramo, Sonia Martinez; Figueiredo, F.; Cerqueira, Marco; Millot, Sandie; Oliveira, Catarina C. V.; Martins, Catarina I. M.; Conceicao, Luis E. C.
Individual differences in behaviour and physiological responses to stress are associated with evolutionary adaptive variation and thus raw material for evolution. In farmed animals, the interest in consistent trait associations, i.e. coping styles, has increased dramatically over the last years. However, one of limitations of the available knowledge, regarding the temporal consistency, is that it refers always to short-term consistency (usually few weeks). The present study used an escape response during a net restraining test, previously shown to be an indicative of coping styles in seabream, to investigate long-term consistency of coping styles both over time and during different life history stages. Results showed both short-term (14 days) consistency...
Tipo: Text
Palavras-chave: Individual variation; Personality; Farm animals; Production; Sperm quality; Stress response.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00334/44485/44198.pdf

Rearing in captivity affects spermatogenesis and sperm quality in greater amberjack, (Risso, 1810)
Provedor de dados: 5
Autores: Zupa, R.; Fauvel, Christian; Mylonas, C. C.; Pousis, C.; Santamaria, N.; Papadaki, M.; Fakriadis, I.; Cicirelli, V.; Mangano, S.; Passantino, L.; Lacalandra, G. M.; Corriero, Aldo.
The greater amberjack, Seriola dumerili (Risso, 1810), is a promising candidate for the diversification of European aquaculture production, but inconsistent reproduction in captivity prevents commercial production. Recent studies showed that greater amberjack confined in sea cages exhibited scarce gonad development and early interruption of gametogenic activity during the reproductive season. The aim of the present study was to improve our understanding of the observed impairment of spermatogenesis. Adult wild and captive-reared males were sampled during 3 different phases of the reproductive cycle: early gametogenesis (EARLY; late April to early May), advanced gametogenesis (ADVANCED; late May to early June), and spawning (SPAWNING; late June to July)....
Tipo: Text
Palavras-chave: Germ cell apoptosis; Germ cell proliferation; Greater amberjack; Rearing in captivity; Seriola dumerili; Sperm quality.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00395/50613/55414.pdf

Impact of the toxic dinoflagellate Alexandrium catenella on Pacific oyster reproductive output: application of flow cytometry assays on spermatozoa
Provedor de dados: 5
Autores: Le Goic, Nelly; Hegaret, Helene; Fabioux, Caroline; Miner, Philippe; Suquet, Marc; Lambert, Christophe; Soudant, Philippe.
The toxic dinoflagellate Alexandrium catenella recurrently blooms on the coasts of France and produces Paralytic Shellfish Toxins (PSTs) that accumulate in bivalves. These toxins can affect various physiological functions including reproduction. The present study aims to validate measurements of sperm viability, DNA content and mitochondrial membrane potential in Pacific oyster Crassostrea gigas using flow cytometry coupled with fluorescent markers, and to use these measurements to assess the cellular parameters of sperm from Pacific oysters exposed to A. catenella. These parameters may influence fertilization, embryogenesis and larval development in free-spawning shellfish. Sperm viability and DNA content estimation were assessed using SYBR-14, which only...
Tipo: Text
Palavras-chave: Harmful algal bloom; Sperm quality; Cellular parameters; Flow cytometry; Pacific oyster; Crassostrea gigas; Alexandrium catenella.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00157/26853/24982.pdf

Rat Spermatogenesis Damage in Intermittent Hypobaric Hypoxia and the Protective Role of Melatonin: I Cauda Epididymal Spermatozoa
Provedor de dados: 77
Autores: Hartley,Ricardo; Castro-Sánchez,Rodrigo; Ramos-Gonzalez,Benito; Bustos-Obregón,Eduardo.
At present it is not clear if male fertility is affected by intermittent hypobaric hypoxia (IHH). This is an important issue since a large human population works over 3000 masl. This study analyzes epididymal sperm, in adult Sprague Dawley rats after five cycles of IHH (7 days exposure to 4200 masl in a hypobaric chamber / 7 days at 500 masl). The animals were separated into groups of 8, one group was exposed to hypoxia (7 days), and the others to IHH for one to five cycles. Controls (500 masl) were examined at the beginning and at the end of the 70 experimental days. A duplicate set of rats treated with melatonin (supposedly protecting from hypoxia) was also examined, as were their controls, injected with 0,03% ethanol (melatonin solvent). Epididymal...
Tipo: Journal article
Palavras-chave: Sperm quality; Intermittent hypobaric hypoxia; Melatonin protection.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400049

Relationship between seminal malondialdehyde levels and sperm quality in fertile and infertile men
Provedor de dados: 52
Autores: Colagar,Abasalt Hosseinzadeh; Pouramir,Mehdi; Marzony,Eisa Tahmasbpour; Jorsaraei,Sayed Gholam Ali.
The aim of this study was to determine the level of malondialdehyde in seminal plasma of fertile and infertile men and investigate its relationship with sperm quality. Results showed that the mean of ± S.D. MDA concentration in seminal plasma of infertile men (0.94 ± 0.28 nmol/ml) was significantly higher than fertile men (0.65 ± 0.17 nmol/ml) (p value&lt; 0.001), and had negative relationship with sperm count, motility and morphology. Therefore it could be concluded that increase in lipid peroxidation was associated with sperm membrane destructed and high level of MDA.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seminal plasma; Male infertility; Sperm quality; Malondialdehyde (MDA); Lipid peroxidation.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600010

Reproductive toxicity of neem seeds (Azadirachta indica) in male quail (Coturnix coturnix japonica)
Provedor de dados: 65
Autores: Góis,Rayr Cezar de Souza; Silva,Leandro Alves da; Araújo Júnior,Hélio Noberto de; Silva,Jardel Bezerra da; Cavalcante,Tânia Vasconcelos; Olinda,Robério Gomes de; Viana,Geysa Almeida; Araujo,Marcelle Santana de; Moura,Gabriela Hémylin Ferreira; Silva,Iago Antônio Ananias da; Freitas,Carlos Iberê Alves; Batista,Jael Soares.
ABSTRACT:  Considering that neem (Azadirachta indica A. Juss.) causes deleterious effects on fertility, the objective was to evaluate the effect of feeding quail (Coturnix coturnix japonica Linnaeus, 1758) of 90 days old with neem seeds on seminal quality, biometric parameters, and testicular morphometrics, as an experimental model. After the 30 day adaptation period to the experimental conditions, birds were randomly distributed in five treatments of neem seeds incorporated into feed, with 10 replicates: T1 (0%), T2 (5%), T3 (10%), T4 (20%) and T5 (40%). After 60 days of receiving experimental rations, their semen was collected to evaluate the sperm quality, the birds were euthanized, and testes were submitted to biometric, histological, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Azadirachta indica; Experimental poisoning; Birds; Testicular changes; Sperm quality.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001100703