Diurnal rhythm of oocyte development and plasma steroid hormone levels in the female red sea bream, Pagrus major, during the spawning season

Matsuyama, Michiya; Adachi, Souichi; Nagahama, Yoshitaka; Matsuura, Shuhei

doi:10.1016/0044-8486(88)90069-5

Cited by 117 publications

(78 citation statements)

References 22 publications

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“…Sections (5 µm thick) were processed for haematoxylin -eosin, Mallory's trichrome, Periodic acid-Schiff (Pas) reaction and immunohistochemistry. The oocyte classification used an adaptation of the schemes commonly used for teleosts (Matsuyama et al, 1988;Mandich et al, 2002;Corriero et al;2003). Oocyte size was determined on histological slides using a Quantimet 500W (Leica, Cambridge, U.K.) image analyser, by measuring the maximum and minimum oocytediameters of at least 30 oocytes from each developmental stage.…”

Section: Histology and Conventional Histochemistrymentioning

confidence: 99%

Histological and immunohistochemical investigation on ovarian development and plasma estradiol levels in the swordfish (Xiphias gladius L.)

Corriero

Acone²,

Desantis³

et al. 2009

Eur J Histochem

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The paper reports a histological and immunohistochemical description of oocyte growth and ultrastructural aspects of zona radiata (ZR) formation as well as the relationship between plasma estradiol-17b‚ (E2) levels and ovarian development in swordfish (Xiphias gladius L.) from the Mediterranean Sea. Ovaries were inactive during March to mid April; maturation occurred during late April to June and spawning in June and July. Zona radiata formation starts, as Pas positive material, in oocytes at the lipid stage. In this stage a deposit of electrondense material between oolemma and follicular cells appears. In the cortical alveoli stage and through the early vitellogenic stage, the deposition of a moderately electrondense material occurred on the inner side of the ZR. Finally, in late vitellogenic oocytes a third layer, made of microfibrillar material, appeared. The immunohistochemical analyses revealed that the initial internalisation of hepatic zona radiata proteins (Zrp) in the swordfish oocyte starts before the uptake of vitellogenin (Vtg) and that it is associated with the low previtellogenic E2 plasma levels, while a significant E2 increase in plasma is associated with the beginning of Vtg uptake. This would appear to confirm the hypothesis that the differential and sequential induction of zonagenesis and vitellogenesis may reflect a general feature of teleost oogenesis

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Section: Histology and Conventional Histochemistrymentioning

confidence: 99%

Histological and immunohistochemical investigation on ovarian development and plasma estradiol levels in the swordfish (Xiphias gladius L.)

Corriero

Acone²,

Desantis³

et al. 2009

Eur J Histochem

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“…Significantly more number of females was also caught in February and October. Variations in sex ratios have been attributed to differential growth or maturity rates, differential mortality rates, or differential migratory patterns between males and females (Sandovy and Shapiro, 1987;Matsuyama et al, 1988) or segregation of the sexes at different habitats (Hopson, 1972;1982). Although the above phenomena were not observed in S. schall during the present study, segregation of the sexes was observed in the tiger fish and Horwood, 1984;Wootton, 1998).…”

Section: Fecunditymentioning

confidence: 99%

Length-weight relationship, breeding season, sex ratio, maturity and fecundity of the Nile catfish <i>Synodontis schall</i> (Bloch and Schneider, 1801) (Pisces: Mochokidae) in Lake Chamo, Ethiopia

Dadebo¹

2016

Eth J Sci & Technol

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Length-weight relationship and some aspects of reproductive biology of the Nile catfish Synodontis schall (Bloch and Schneider, 1801) in Lake Chamo, Ethiopia were studied from fish sampled in each month during January to December 2010. The relationship between fork length (FL) and total weight of males (TW = 0.020FL 3.207 , R 2 = 0.965, n = 277), females (TW = 0.020FL 3.248 , R 2 = 0.976, n = 407) and the sexes combined (TW = 0.020FL 3.240 , R 2 = 971, n = 684) were curvilinear and statistically significant (ANOVA, P<0.05). The proportion of breeding fish was high between May and September, during which time 46.8% -72.0% of the males and 41.3% -77.9% of the females had ripe gonads. Thus, the months with high proportions of breeding fish were considered as the breeding season of the fish. More number of females was caught in all size classes but sex ratios were significantly different from 1:1 in size classes 30.0-34.9 cm FL and 35.0-39.9 cm FL. The overall male to female sex ratio of 1:1.39 was also significantly different (χ 2 = 24.71, P<0.001) from the theoretical ratio of 1:1. Size at first maturity of males was 23.1 cm FL while that of females was 26.4 cm FL. Fecundity ranged from 3,500-54,089 eggs with a mean of 21,017 eggs. The mean relative fecundity of S. schall was 76.1 eggs g -1 of body weight. The average number of eggs g -1 of ovary (preserved wet weight) ranged from 983 to 3,797 with a mean of 1,847 eggs g -1 . The relationships between fecundity and fork length and fecundity and total weight were curvilinear while the relationship between fecundity and ovary weight was linear.

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“…Furthermore, the simultaneous presence of oocytes at different developmental stages indicated that oocyte development was asynchronous. Studies in Japan (Matsuyama et al 1987(Matsuyama et al , 1988 and New Zealand (Scott & Pankhurst 1992) have also concluded that the snapper is a multiple batch spawner with asynchronous oocyte development and indeterminate fecundity. No prior studies in Australia have documented the reproductive mode of snapper.…”

Section: Discussionmentioning

confidence: 99%

“…Based on the microscopic examination of these slides, fish were classified into two groups: mature spawning and mature non-spawning. Mature spawning fish were defined as those with ovaries that contained oocytes that were at the migratory nucleus stage or were hydrated, or those with ovaries that contained new post-ovulatory follicles (POFs) (equivalent to Stage 1 POFs as defined in Matsuyama et al 1988). Mature, nonspawning fish had ovaries that lacked any features that suggested spawning was imminent or had occurred recently.…”

Section: Laboratory Analysis Of Preserved Samplesmentioning

confidence: 99%

The spawning dynamics of snapper (Chrysophrys auratus) in northern Spencer Gulf, South Australia

Saunders

Fowler

Gillanders

2012

New Zealand Journal of Marine and Freshwater Research

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This study investigated the inter-and intra-annual variation in the spawning dynamics of snapper (Chrysophrys auratus). Reproductive samples from northern Spencer Gulf, South Australia were collected over three seasons (2005/06, 2006/07 and 2007/08) and were analysed macro and microscopically. Spawning activity was determined by calculating estimates of spawning fraction and batch fecundities. The onset of spawning occurred in November but varied between years and corresponded with times when water temperature was between 18 8C and 20 8C. The length of the spawning season also differed between years. In each year the peak spawning activity occurred during December when fish spawned almost daily. Spawning frequency and relative batch size did not differ between the first two spawning seasons but, in the third season, batch size was considerably greater and spawning fractionally lower. These results are contrasted with a known recruitment of 0' over the three years of the study.

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Diurnal rhythm of oocyte development and plasma steroid hormone levels in the female red sea bream, Pagrus major, during the spawning season

Cited by 117 publications

References 22 publications

Histological and immunohistochemical investigation on ovarian development and plasma estradiol levels in the swordfish (Xiphias gladius L.)

Histological and immunohistochemical investigation on ovarian development and plasma estradiol levels in the swordfish (Xiphias gladius L.)

Length-weight relationship, breeding season, sex ratio, maturity and fecundity of the Nile catfish <i>Synodontis schall</i> (Bloch and Schneider, 1801) (Pisces: Mochokidae) in Lake Chamo, Ethiopia

The spawning dynamics of snapper (Chrysophrys auratus) in northern Spencer Gulf, South Australia

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