The timing of ovulation and stripping and their effects on the rates of fertilization and survival to eying, hatch and swim-up in the rainbow trout (Salmo gairdneri R.)

Springate, J.R.C.; Bromage, Niall; Elliott, J.A.K.; Hudson, Darrell

doi:10.1016/0044-8486(84)90032-2

Cited by 169 publications

(82 citation statements)

References 12 publications

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“…Determination of the latency period between the last hormone injection and the occurrence of ovulation in each experimental fish was initiated after 6 h of the treatment by applying gentle pressure on the abdomen in an anterior-to-posterior direction and repeating the same procedure every 15 min until mature ova could be manually removed (Springate et al 1984). Once the latency period of respective fish group was known, the same treatment was repeated with six fresh individuals.…”

Section: Determination Of the Latency Period And Collection Of Maturementioning

confidence: 99%

Melatonin actions on ovaprim (synthetic GnRH and domperidone)-induced oocyte maturation in carp

Moniruzzaman¹,

Hasan²,

Maitra³

2016

Reproduction

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The major objective of the present study was to demonstrate the actions of exogenous melatonin on ovaprim (synthetic GnRH and domperidone)-induced final oocyte maturation focusing on the oxidative status of pre-ovulatory follicles in the carp Catla catla. Accordingly, gravid carp during the early spawning phase of the reproductive cycle were injected with melatonin and/or ovaprim at different time intervals or luzindole (a pharmacological blocker of melatonin receptors) before their administration. We studied their effects on the latency period, the rate of germinal vesicle breakdown (GVBD; a visual marker of final oocyte maturation) in oocytes, and the levels of maturation-promoting factor (MPF), as well as oxidative stress, different antioxidants, melatonin and MT1 melatonin receptor protein in the extracts of pre-ovulatory follicles. Notably, melatonin treatment 2 h before the injection of ovaprim resulted in the shortest latency period as well as the highest rate of GVBD and MPF formation. Exogenous melatonin, irrespective of the injection schedule, caused a significant reduction in intra-follicular oxidative stress and an increase in the levels of both enzymatic and nonenzymatic antioxidants, melatonin and its receptor protein. Concentrations of ovarian melatonin in each fish exhibited a significant negative correlation with the level of oxidative stress, but a positive correlation with the rate of GVBD and the activity/level of different antioxidants. However, no significant effects of melatonin and/or ovaprim were detected in luzindole-pretreated carp. Collectively, the present study provides the first evidence that melatonin pretreatment in carp ameliorates ovaprim actions on the process of final oocyte maturation by the formation of MPF and alleviates oxidative stress in pre-ovulatory follicles by stimulating different antioxidants.

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Section: Determination Of the Latency Period And Collection Of Maturementioning

confidence: 99%

Melatonin actions on ovaprim (synthetic GnRH and domperidone)-induced oocyte maturation in carp

Moniruzzaman¹,

Hasan²,

Maitra³

2016

Reproduction

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“…Such an initial increase in the egg viability rates after ovulation has been documented in some studies (Sakai et al, 1975;Bry, 1981;Springate et al, 1984;Mylonas et al, 1992;Linhart andBillard, 1995: Aegerter andSamarin et al 2008;Rasines et al, 2012), while it has not been found in other reports (e.g., Espinach et al, 1984;Lahnsteiner, 2000;Rizzo et al, 2003;Samarin et al, 2011). We found the same trend in common carp (Cyprinus carpio) and pike (Esox lucius) post-ovulatory oocytes as well (unpublished data).…”

Section: Discussionmentioning

confidence: 76%

“…For each measured parameter, means sharing a common alphabetical symbol do not significantly differ. Rizzo et al, 2003Rasines et al, 2012Espinach et al, 1984Formacion et al, 1993Samarin et al, 2011aSakai et al 1975Bry, 1981;Springate et al, 1984;Lahnsteiner, 2000;Azuma et al 2003;Bonnet et al, 2003;Aegerter and Jalabert, 2004;Samarin et al, 2011 Caspian brown trout (Salmo trutta caspius) 30-40 days Bahrekazemi et al, 2010 different fish species (Table 3). Increasing eyed-egg mortality and malformation rates can be interpreted as post-ovulatory oocyte ageing is accompanied by biochemical changes inside the eggs (Craik and Harvey, 1984;Lahnsteiner, 2000) as well as by the leakage of a number of oocyte components, such as protein fragments, into the ovarian fluid (Rime et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

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Samarin¹,

Blecha²,

Bytyutskyy³

et al. 2015

Turk. J. Fish. Aquat. Sci.

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The effect of post-ovulatory oocyte ageing on egg quality was assessed in pikeperch Sander lucioperca to identify the reliable and the best post-ovulatory stripping time. Ovulated eggs were retained in the ovarian cavity for 0-3, 3-9, 6-12 and 12-18 hours post-ovulation (HPO) prior to fertilization. Fertilization, hatching and embryo mortality rates as well as the occurrence of larval malformations and ploidy anomalies were considered as indices for egg quality. The results indicated that the fertilization and hatching rates remained nearly constant, at approximately 80%, for the eggs retained in the ovarian cavity between 0-18 hours after ovulation. Post-ovulatory oocyte ageing did not affect the embryo mortality or the occurrence of larval malformations at least during the 12-hour experimental period. However, the incidence of triploidization in the larvae increased over time from 1.6% at 0-3 HPO to 5% in more aged oocytes at 6-18 HPO. Egg quality retention for at least 12 hours after ovulation appears to be helpful for pikeperch breeding programs by providing synchronous artificial egg insemination and thereby easing hatchery management.

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“…Although there are no strong evidences or reports on the changes in the quantity of spermatozoa at different age, many researchers reported decreased relative fecundity in female fishes as age advances (Siraj et al, 1983;Springate et al, 1984). The age of broodstock also affects the success of sperm storage.…”

Section: Introductionmentioning

confidence: 99%

Captive broodstock development of common carp Cyprinus carpio Linnaeus, 1758: influence of age on spermatogenesis and fertilisation parameters

Betsy¹,

Kumar²,

Jawahar³

et al. 2016

Indian J. Fish.

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Knowledge on the quality of male and female gametes which may affect fertilisation success and larval survival is necessary to enhance fish production to meet global demand. Gamete quality is affected by factors like sex ratio, stocking density, age, size, nutrition and feeding regime. In the present study, the spermatological and fertilisation parameters as influenced by the age of brooders of Cyprinus carpio Linnaeus 1758 developed under captive condition from a single population were studied with special reference to dilution ratios. Milt was collected from 6, 12 and 18 months old brooders of C. carpio and diluted at three ratios viz., 1:40, 1:80 and 1:120 using freshwater fish saline. Sperm density, spermatocrit value, seminal plasma composition, motility duration, fecundity, fertilisation and hatching rates were studied for brooders of all age groups. The results showed that milt from 12 months old brooder produced good quality milt in terms of motility duration (69.66±4.72 sec), fertilisation rate (91.3±3.05%) and hatching rate (76.5±2.64%) at 1:40 dilution ratio.

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The timing of ovulation and stripping and their effects on the rates of fertilization and survival to eying, hatch and swim-up in the rainbow trout (Salmo gairdneri R.)

Cited by 169 publications

References 12 publications

Melatonin actions on ovaprim (synthetic GnRH and domperidone)-induced oocyte maturation in carp

Melatonin actions on ovaprim (synthetic GnRH and domperidone)-induced oocyte maturation in carp

Untitled

Captive broodstock development of common carp Cyprinus carpio Linnaeus, 1758: influence of age on spermatogenesis and fertilisation parameters

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