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1.
金钱鱼性腺发育及其组织结构观察 总被引：7，自引：3，他引：4
采用常规石蜡切片,H.E染色研究了金钱鱼性腺发育及组织结构特征.结果显示,2+龄的金钱鱼性腺发育成熟.金钱鱼精巢为管型,可分为:精原细胞增殖期、精母细胞生长期、精母细胞成熟期、精子细胞变态期、精子成熟期等5个时期.从Ⅱ期精巢起,金钱鱼精巢的成熟系数(GSI)为0.2％～1.5％,精巢成熟系数在发育到精子细胞成熟期(Ⅴ期)达到峰值,肝重指数(HSI)在精子细胞变态期(Ⅳ期)达到峰值.金钱鱼卵巢的卵母细胞发育过程可分为5个时相,相对应的卵巢发育亦分为5个时期.从Ⅱ期卵巢起,金钱鱼卵巢的成熟系数为1.2％～14.9％,在发育到Ⅴ期时达到峰值,HSI在Ⅳ期达到峰值.Ⅱ时相卵母细胞出现卵黄核和滤泡膜.Ⅲ时相卵母细胞中开始出现油滴,卵黄颗粒.Ⅳ时相卵母细胞中卵黄颗粒与油滴的数量迅速增多.Ⅴ时相卵母细胞中卵黄颗粒融合成片,在卵母细胞中卵黄颗粒与油球之间在数量上没有明显的差异.根据切片观察,Ⅴ期卵巢中,除了Ⅴ时相卵母细胞外,还有一定数量的Ⅱ、Ⅲ和Ⅳ时相卵母细胞,卵母细胞发育呈现非同步型.并且发现在多数产完卵后的卵巢中,除空的滤泡外亦存在一定数量的Ⅱ、Ⅲ和Ⅳ期卵母细胞,因此推测,金钱鱼的产卵类型为分批非同步产卵类型. 相似文献
2.
采用组织学方法系统研究了人工养殖条件下半滑舌鳎亲鱼卵巢的组织发育周年变化特征.结果表明,卵母细胞发育可分为6个时相,卵巢发育分为6期.卵巢不同发育时期都由不同类型的卵母细胞组成,半滑舌鳎为非同步分批多次产卵类型.周年发育过程中,6月龄前的鱼卵巢发育处于第Ⅰ期;9～12月龄卵巢可发育至第Ⅱ期;12月龄半滑舌鳎性腺可发育达到Ⅲ期,并一直保持至24月龄.3龄雌鱼达到性成熟,卵巢可发育至第Ⅳ期;随着水温和光周期的调控,卵巢发育进入成熟期(Ⅴ期),发生水合现象是卵母细胞成熟并准备排卵的信号;产卵结束后卵巢退化至第Ⅵ期,排出的卵母细胞退化吸收,以Ⅲ期卵巢越冬后,卵巢退化至Ⅱ期并持续至下一个繁殖周期.人工养殖条件下,卵巢内存在卵母细胞闭锁现象.性腺周年发育过程中,性腺指数(GSI)在性腺达到成熟期时达到峰值,产卵结束后性腺快速退化,GSI值各月份差异显著(P<0.05),亲鱼性腺重量在卵巢发育成熟过程中一直处于生长状态.亲鱼肝脏指数(HSI)在产卵前7～8月份(性腺达到成熟期前30 d左右)达到最大,表明7～8月份是性腺进行卵子发育、卵黄能量储备的重要时期,亲鱼在产卵前通过积极摄食储备体内能量,肝脏在卵母细胞卵黄积累方面具有重要的生理作用.肥满度(CF)值在繁殖盛期10～11月份达到最大,表现出与GSI类似的变化趋势. 相似文献
3.
《水产科学》2021,(3)
翎电鳗是深受广大水族爱好者喜爱的观赏鱼类,研究其卵巢发育规律,可以为该鱼的人工繁育提供理论基础。翎电鳗成熟卵巢为囊状,泄殖孔位于体前端下颌后方。常规石蜡切片方法对其卵巢进行观察发现,翎电鳗的卵巢发育分为6个时期,卵子发育分为5个时相。4月龄雌鱼卵巢中有较多第Ⅱ时相卵母细胞,少量卵原细胞,发育至第Ⅱ期;8月龄雌鱼卵巢中含有卵原细胞、第Ⅱ时相和第Ⅲ时相卵母细胞,发育至第Ⅲ期;10月龄雌鱼卵巢中同时存在卵原细胞、第Ⅱ时相、第Ⅲ时相和第Ⅳ时相卵母细胞,发育至第Ⅳ期,达性成熟;11月龄雌鱼卵巢中第Ⅴ时相卵母细胞占主要成分,为Ⅴ期。Ⅴ期卵巢中成熟卵径的大小分布在1.08～1.15 mm和1.78～1.84 mm。翎电鳗雌性亲鱼在理想环境下存在短时间内一批卵排出后新一批次的卵成熟并被释放的可能,产卵类型属分批同步型。 相似文献
4.
采用形态学和连续组织切片技术对瓦氏黄颡鱼(Pelteobagrus vachelli)卵巢的组织形态学进行了研究。结果显示:瓦氏黄颡鱼卵巢发育分为6个时期,卵母细胞发育分为6个时相。从10月至次年的2月份,卵巢处于第Ⅱ期;3—4月份卵巢处于第Ⅲ期;4—5月初卵巢处于第Ⅳ卵期;5—7月卵巢处于第Ⅴ期;8—9月卵巢处于第Ⅵ期。在第2时相的卵母细胞中出现卵黄核和滤泡细胞;第3时相的卵母细胞出现液泡,数目和层数随着卵巢的发育逐渐增加;第4时相的卵母细胞充满卵黄颗粒,并出现了受精孔和精孔细胞。瓦氏黄颡鱼是一次产卵类型。 相似文献
5.
池塘养殖刀鲚卵巢发育的形态及组织学研究 总被引：5，自引：1，他引：4
采用石蜡连续组织切片和扫描电镜技术,对池塘养殖刀鲚(Coilia nasus)卵巢的各个发育阶段进行了形态和组织学研究,并对卵母细胞各个时相的形态特征进行了较为详细的描述,分析了刀鲚卵巢发育的周年变化规律和产卵类型.结果显示,刀鲚卵巢发育可为6个时期:Ⅰ期卵巢较细,呈线状,长约25 mm,以卵原细胞向初级卵母细胞过渡的细胞为主.Ⅱ期卵巢细柱状,长为40～50 mm,外观呈浅肉红色至肉黄色,2时相卵母细胞占92%以上;Ⅲ期卵巢呈肉色直至浅青色,长55～65 mm,中部逐渐膨大,细胞处于初级卵母细胞的大生长期,由2～4时相卵母细胞组成,其中3时相卵母细胞占60%～75%,出现油滴;Ⅳ期卵巢青色直至灰色,体积急剧增大,呈囊状,约占体腔的2/3,肠大部分被掩盖,肉眼可见增大的卵粒,晚期可见游离的卵粒,细胞处于初级卵母细胞发育的晚期,油滴充满细胞,第4时相卵细胞占86%以上,最大卵径482 μm;V期卵巢柔软膨大,占据腹部绝大部分,外观呈玉绿色,卵粒充满卵巢,清晰易辨,细胞中卵黄和原生质表现出明显的极化现象,核膜消失,卵径为750～900μm;Ⅵ期卵巢为酱紫色,体积明显减小且松软,卵巢腔萎缩,以空的滤泡细胞和2时相细胞为主.刀鲚繁殖高峰期在4-6月,10月中、下旬起卵巢重新进入Ⅱ期,直到翌年2月都停留在Ⅱ期,3月下旬部分刀鲚卵巢开始重新发育.研究表明,刀鲚属一次产卵类型的鱼类,但个体间卵巢发育差异显著,产卵持续时间较长. 相似文献
6.
大鳞副泥鳅卵巢发育的组织学研究 总被引：1，自引：0，他引：1
采用组织切片方法,对大鳞剐泥鳅的卵巢发育进行了组织学研究,系统地描述了卵巢的形态结构、组织学特征.2个卵巢序有成对,位于体腔中线两侧和消化管的背面,以肠系膜与体壁相连.大鳞副泥鳅卵巢的发育分为Ⅵ个时期,第Ⅱ期卵巢出现产卵板,卵母细胞明显增多,原牛质增长,胞质嗜碱性增强,早期排列紧密,后期排列疏松;第1II期卵巢体积显著增大,扁圆,浅黄色,卵黄颗粒出现在皮质M,单层滤泡层形成,放射带…现;第IV期卵巢体积更加增大,圆筒形,深黄色,能见许多血管分枝;第V期卵巢一般只在繁殖季节达到性成熟的可自然排卵产出体外的雌鳅体内出现;第VI期卵巢呈现排空的滤泡.卵母细胞的发育分为5个时相,在第2时相晚期列第3时相早期,卵母细胞中具有卵黄核. 相似文献
7.
采用组织切片方法和常规目测法对黄海鯷鱼的卵巢发育特征进行了研究,描述了卵巢各发育期的特征,对不同发育期卵巢内卵母细胞的发育时相组成、卵径分布、卵巢两叶及其前、中、后部发育的差异情况进行了分析。结果表明,鯷鱼卵母细胞发育不同步;Ⅱ期卵巢由1～3时相卵母细胞组成,2时相卵母细胞在数量上占优势（66．39／6）;Ⅲ、Ⅳ和Ⅵ期卵巢均由1～4时相卵母细胞组成,其主要区别在于4时相卵母细胞所占比例不同,其中Ⅳ期卵巢中最高（34．8％）,Ⅲ期次之（28．69／6）,Ⅵ期最低（17．8％）;Ⅴ期卵巢由1～5时相卵母细胞组成,已发育成熟的5时相细胞所占比例最高（29．8％）;卵巢由Ⅲ期到Ⅴ期的发育过程中,主要是3、4时相卵母细胞向4、5时相的发育,1、2时相细胞所占比例基本不变。卵母细胞的粒径分布呈明显的峰、谷特征,这与以前对该问题的“浅锯齿状分布”认知有明显不同;Ⅲ和Ⅵ期卵巢内的卵径（长径）呈单峰分布,优势粒径组均为0．5～0．6mm;Ⅳ和Ⅴ期卵巢呈双峰分布,优势粒径组分别为0．2～0．3mm、0．7～0．8mm和0．5～0．6mm、1．1～1．2mm;V期卵巢两个优势卵母细胞群在粒径分布上彼此分离,粒径较大的群内均为水合卵母细胞,呈现出明显的分批产卵特征。鯷鱼卵巢左叶大、右叶小,右／左重量比值为0．71,95％置信区间为（0．67,0．75）;卵巢叶间和叶内部位间卵母细胞的发育状态无显著差异（P〉0．05）。 相似文献
8.
9.
长江口纹缟虾虎鱼繁殖季节的性腺组织学 总被引：2，自引：0，他引：2
采用常规组织切片法研究了长江口纹缟虾虎鱼各期卵巢和精巢的组织学结构特征.结果表明,每年的4、5、6月为长江口纹缟虾虎鱼的繁殖季节.进入繁殖季节的卵巢以Ⅳ期为主,4-6月的Ⅳ期卵巢分别占当月总数的62.32%、71.43%和48.41%.Ⅲ期卵巢只占当月总数的24.55%、12.33%、6.28%;Ⅴ期卵巢占13.13%、10.45%和26.67%;5、6月份Ⅵ期卵巢占5.89%、18.10%.Ⅲ～Ⅵ期的性腺指数(GSI)分别为4.49%±2.07%、31.75%±7.08%、38.33%±6.24%和7.78%±3.18%.4-6月精巢均处于Ⅳ、Ⅴ、Ⅵ期,4月以Ⅳ期为主,5、6月以Ⅴ期为主.Ⅳ～Ⅵ期精巢的GSI分别为0.66%±0.07%、0.96%±0.14%和0.43%±0.06%.纹缟虾虎鱼卵母细胞发育可以分为5个时相.Ⅲ期卵巢以第Ⅲ时相卵母细胞为主,这时期液泡、卵黄颗粒出现,同时含有少量Ⅰ时相和Ⅱ时相的卵母细胞;Ⅳ期卵巢以第Ⅳ时相卵母细胞为主,Ⅳ时相晚期卵母细胞开始出现油球,细胞核偏移和变形,放射带明显;Ⅴ期卵巢的卵细胞游离,卵膜外的二层滤泡膜脱落;Ⅵ期卵巢主要由第Ⅱ、Ⅲ时相卵母细胞和大量的空滤泡外膜组成.纹缟虾虎鱼精巢为小叶型,精巢内生殖细胞分为初级精母细胞、次级精母细胞、精细胞和精子,各期生殖细胞和支持细胞组成了精小囊,同一精小囊中的生精细胞发育同步.精子成熟后,精小囊破裂释放精子进入小叶腔,完成发育过程. 相似文献
10.
研究了圆斑星鲽卵巢年周期发育的组织学规律及其数量形态特征变化.结果表明,圆斑星鲽产卵属1年1次成熟分批产卵类型,卵巢发育属非同步分批成熟类型.性成熟亲鱼在年周期发育中经历5个发育时期,同时可见5个发育时相的卵母细胞,不同发育时期的卵巢中卵母细胞类型和组成比例不同.性腺指数(GSD、肝脏指数(HSI)和肥满度(CF)在亲鱼的年周期发育中呈现规律性的变化,与卵巢发育呈现密切的关联.亲鱼卵巢发育的有效积温为1050日度. 相似文献
11.
于光镜于对东海鳓卵巢切片作了组织学观察，结果表明，5月－7月为东海鳓的繁殖期，其卵巢在Ⅳ期、Ⅴ期、Ⅵ－Ⅳ‘期和Ⅴ‘期，8月－9月鳓卵巢处在产后休整阶段；10月－翌年2月为越冬Ⅱ期卵巢；3月－4月卵巢处在产前发育阶段，在小生长期，卵核的体积较核质的体积增大快，核质比大，大小长期，随着卵黄物质的积累，卵母细胞体积快速增加, 比下降。在鳓卵母细胞发育中，曾见有两层卵膜结构，但接近成熟的卵母仅有一层卵膜。东海鳓的产卵方式为短期分批产卵类型。在一个生殖周期内，一般产卵2次。 相似文献
12.
The gonadal development and gametogenic cycle of transplanted-cultured pearl oyster, Pinctada fucata martensii, were investigated using individuals collected monthly from Tong-Young along the south coast of Korea from October 2000 to September 2001. The result of monthly change of condition index was similar to tissue weight rate. The highest value was observed in June and the lowest value was observed in November. The gonad of the pearl oyster was located around the digestive diverticula. The ripe testis was milky white while the ovary was light brown. The spawning period of the pearl oyster extended from April to August, with a peak between June and July. The gametogenic cycle could be classified into five successive stages: multiplicative stage (November to February), growing stage (January to March), mature stage (March and April), spawning stage (April to August) and resting stage (September to November). 相似文献
13.
N.J. Duncan N. Garcia-Aguilar G. Rodríguez-M. de O. M. Bernadet C. Martinez-Chavez C. Komar P. Estañol A. Garcia-Gasca 《Fish physiology and biochemistry》2003,28(1-4):505-506
Few mature female bullseye puffer have been observed to spawn in captivity. The ovary appears to develop to late vitellogenesis, but not to complete final oocyte maturation (FOM). Luteinizing hormone releasing hormone analogue (LHRHa) treatment induced the spawning of good quality eggs in both wild and captive brood fish. 相似文献
14.
ABSTRACT: The stage of ovarian development and annual reproductive cycle of female armorhead Pseudopentaceros wheeleri collected from seamounts of the southern Emperor–northern Hawaiian Ridge in 1993 and 1995–1996 was investigated through use of the gonadal somatic index ( GSI ) and ovarian histology. The stages of oocyte development were classified into eight developmental stages (perinucleolus, cortical alveolus, oil droplet, early yolk globule, late yolk globule, migratory nucleolus, prematuration, and maturation) based on histological characteristics. Oocytes of different size and developmental stage were present within ovaries during the spawning season. Oocyte development appears to be asynchronous and armorhead apparently spawn several times during the spawning season. The stage of the most developed oocyte was used to classify the stage of ovarian maturation. The GSI increased gradually with ovarian development. Oocytes in the perinucleolus, cortical alveolus, and oil droplet stages were present in ovaries throughout the year. Early and late yolk globule stages appeared during August–September indicating that yolk formation begins during late summer. The migratory nucleolus through maturation stages were detected during November–January. Post ovulatory follicles were present during November–March, and GSI values rapidly decreased in February. Results indicate that spawning occurs during November–February and peaks during December–January. 相似文献
15.
Lumpfish, Cyclopterus lumpus L., has an extended ovary development period and a relatively long spawning season. It therefore seems unlikely that individuals spawning later in the season would be able to recover from spawning and develop their gonads in time to spawn during the early part of the season the following year. The hypothesis that individuals spawning early or late in a spawning season would spawn early or late the following year was tested using fish tagged in Iceland between 2008 and 2017. The tagging date and recapture date the following year were positively correlated with an average of 356 days at large (DAL). Fish sampled from the fishery indicate that tagging/recapture date gives an indication of spawning time. From this, it was concluded that spawning time in the current year can be used to predict spawning time the following year. As fishing effort was greatest at the end of April/beginning of May, it seems likely that fish that come to spawn at this time will be subject to a higher fishing mortality. Therefore, they will be less likely to spawn successfully than fish spawning earlier or later in the year. If spawning time is under genetic control, then this could have consequences for the spawning phenology of lumpfish. 相似文献
16.
Mariah J. Talbott Sarah A. Servid Anna G. Cavinato Joel P. Van Eenennaam Serge I. Doroshov Peter Struffenegger Molly A.H. Webb 《Fish physiology and biochemistry》2014,40(1):1-7
Assessing stage of oocyte maturity in female sturgeon by calculating oocyte polarization index (PI) is a necessary tool for both conservation propagation managers and caviar producers to know when to hormonally induce spawning. We tested the assumption that sampling ovarian follicles from one section of one ovary is sufficient for calculating an oocyte PI representative of oocyte maturity for an individual animal. Short-wavelength near-infrared spectroscopy (SW-NIR) scans were performed on three positions per ovary for five fish prior to caviar harvest. Samples of ovarian follicles were subsequently taken from the exact location of the SW-NIR scans for calculation of oocyte PI and follicle diameter. Oocyte PI was statistically different though not biologically relevant within an ovary and between ovaries in four of five fish. Follicle diameter was statistically different but not biologically relevant within an ovary in three of five fish. There were no differences in follicle diameter between ovaries. No statistical differences were observed between SW-NIR spectra collected at different locations within an ovary or between ovaries. These results emphasize the importance of utilizing both oocyte PI measurement and progesterone-induced oocyte maturation assays while deciding when to hormonally induce spawning in sturgeon females. 相似文献