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1.
为建立圆口铜鱼(Coreius guichenoti)精子超低温冷冻保存方法,采用计算机辅助精子分析系统(CASA)评价了4种稀释液(D15、D20、L1、D1), 3种抗冻保护剂[二甲基甲酰胺(DMF)、二甲基亚砜(DMSO)、甲醇(METH)]在3种体积浓度(7.5%、10%、12.5%, V/V)下对圆口铜鱼精液的冷冻保存效果,并比较了150 mOsm/kg NaCl与超纯水作为激活剂对精子活力的影响。结果表明,D1组稀释液的精子活率(MOT)最高,为(74.64±13.17)%,与鲜精无显著差异(P0.05);以10%甲醇作为抗冻保护剂的圆口铜鱼精子经超纯水激活后,测得MOT最高,达到(78.11±14.74)%,与鲜精无显著差异(P0.05),精子运动速度达最大,平均曲线运动速度(VCL)、平均直线运动速度(VSL)、VAP(平均路径运动速度)分别达到(50.28±12.46)μm/s、(35.06±10.82)μm/s、(39.44±12.46)μm/s,精子快速运动时间和寿命分别为(8.67±1.15) s、(33.33±5.00) s,显著低于鲜精(P0.05); 7.5%甲醇组和7.5%二甲基甲酰胺组的MOT次之,分别为(77.71±17.74)%、(76.42±12.49)%,抗冻剂二甲基亚砜组的MOT显著低于甲醇组、二甲基甲酰胺组(P0.05)。12.5%的3种抗冻保护剂中,几乎无精子存活;在不同种类不同浓度的抗冻剂保护下,10%甲醇组,相较于使用超纯水激活,用150 mOsm/kg NaCl激活后的精子活率和寿命更高,说明Na~+有延长冻精寿命,提高精子活率的作用。研究表明, D1+10%METH (7.8 g/L NaCl+0.5 g/L KCl+15 g/L葡萄糖+10%METH)可用于圆口铜鱼精液超低温冷冻保存,为圆口铜鱼的繁育工作和种质资源保护奠定了基础。  相似文献   

2.
栉江瑶(Atrina pectinata)为我国重要的海洋经济双壳贝类,近年来,其养殖生产活动备受养殖企业关注,为发展和优化其人工繁殖技术,本研究探究了人工海水中铵离子浓度和pH的变化对栉江瑶新鲜精子游泳运动的激活作用,定量描述了高度活化状态下精子曲线运动速率(VCL)、直线运动速率(VSL)、平均路径运动速率(VAP)和鞭毛摆动频率(BCF)的运动学特征,并对精子ATP含量、ATP酶与超氧化物歧化酶(SOD)活性进行了记录。结果显示,简单提高海水pH可略微提高栉江瑶精子运动率,但无法使精子进入高度活化状态;含有铵离子的碱化海水可有效激发精子游泳运动,3 mmol/L氨海水激活效果最佳。经3 mmol/L氨海水激活后,精子活力等级(MI)在21 min内一直保持在≥4的状态,在激活的前3 min内精子运动率都在80%以上,VCL>56 μm/s,VSL>17 μm/s,VAP>30 μm/s,BCF>6 Hz。精子ATP含量在激活5 min后降低至初始含量的30.29% [(128.80± 66.92) μmol/g prot],随后,无显著变化(P>0.05)。精子Na+-K+-ATP酶和Ca2+-Mg2+-ATP酶活性在运动过程中较为稳定,其中,Na+-K+-ATP酶活性较低[(0.62±0.03) U/mg prot],Ca2+-Mg2+-ATP酶活性较高[(6.08± 0.04) U/mg prot]。精子SOD活性在15 min内逐步降低至[(1.23±0.73) U/mg prot],随后维持稳定。本研究可为栉江瑶精子激活机制深入研究提供基础,助力发展栉江瑶人工繁育技术。  相似文献   

3.
以HBSS溶液为稀释液,DMSO为抗冻剂,0.25 mL麦细管为冻存管,两步降温法超低温冻存黄姑鱼精子,并用单细胞凝胶电泳(SCGE)技术检测了冻精的DNA损伤,荧光双染色流式细胞仪技术(FCM)检测了冻精的细胞膜性结构损伤。结果表明,DMSO质量分数在5%~20%时,冻精的活力与鲜精相比无显著差异;其中DMSO质量分数在10%时,冻精的激活率、运动时间及寿命分别为85.25%±3.95%、(3.23±0.27) min及(3.83±0.33) min。DMSO质量分数在25%、30%时,冻精的活力显著下降。SCGE检测显示,DMSO质量分数在5%~15%时、冻精的DNA损伤与鲜精相比差异不显著,DMSO质量分数为20%、25%、30%时,冻精的DNA损伤明显加重,冻精的DNA损伤与抗冻剂DMSO的质量分数成正相关。FCM检测显示,DMSO质量分数在5%~20%时,冻精中线粒体及细胞膜结构保持完整性的精子比例与鲜精相比无显著差异,DMSO质量分数在25%、30%时,冻精中的线粒体及细胞膜结构保持完整性的精子比例明显下降。分析认为,较高质量分数的DMSO是引起冻精活力下降,DNA、线粒体及细胞膜结构损伤加重的主要原因。  相似文献   

4.
【目的】本文旨在探究长期超低温冷冻保存中鞍带石斑鱼精子质膜、活力、超微结构及酶活性的变化，为阐明影响鞍带石斑鱼精子冷冻保存质量的相关机制提供理论依据。【方法】采集2022年鞍带石斑鱼鲜精及储存时间分别为23、49、61个月冷冻保存精液，用伊红-苯胺黑染色方法检测精子质膜完整性；用计算机辅助精子分析仪（CASA）检测精子运动参数；测量精浆和精子中琥珀酸脱氢酶（SDH）、过氧化氢酶（CAT）、谷胱甘肽还原酶（GR）、总超氧化物歧化酶（T-SOD）、谷胱甘肽过氧化物酶（GSH-PX）和肌酸激酶（CK）共六种酶活性的变化及三磷酸腺苷（ATP）浓度变化；用扫描电镜和透射电镜观察鲜精和冻精超微结构。【结果】伊红-苯胺黑染色检测结果发现，鲜精质膜完整性最高为83.43±2.73 %，经过超低温冷冻后，精子质膜完整性显著降低（P<0.05），且随着冷冻保存时间的延长而逐渐降低。CASA结果显示鲜精活力最高为90.47±3.34 %，经过超低温冷冻后精子活力显著降低（P<0.05），但长期保存23-61个月精子活力无显著性差异，精子活力保持在63.95±3.66 %-68.58±2.73 %，具有稳定的活力，且鲜精与冻精之间精子平均直线运动速度（VSL）、平均曲线运动速度（VCL）和平均路径速度（VAP）均没有显著差异（P>0.05）。精子超微结构显示，鲜精形态结构正常、线粒体排列结构规则、形态大小正常。经过超低温冷冻保存后，精子形态结构损伤明显，表现为精子头部质膜破损、细胞质外漏、细胞核膜破损、尾部鞭毛断裂或脱落等损伤；鞍带石斑鱼精浆和精子超低温冷冻前后六种酶活性的变化及ATP含量结果显示，经过超低温冷冻后，精子内SOD、GSH-PX和CAT三种酶及ATP含量均有显著性降低（P<0.05）。精浆中酶活力升高，除GR和CAT外，其余酶活性均差异显著（P<0.05）。【结论】长期超低温冷冻对鞍带石斑鱼精浆和精子酶活性、精子活力及精子超微结构均具有较显著影响，【意义】研究结果为鱼类精子冷冻损伤机理研究积累了丰富的数据，为鱼类精子长期冷冻保存提供了技术参考和评价指标。  相似文献   

5.
黄鳝精子活力检测和精子入卵早期过程观察   总被引：12，自引：1，他引：12       下载免费PDF全文
周定刚 《水产学报》2003,27(5):398-402
采用Olympus3×51相差系统显微镜和SQIAS—1000彩色精液质量图文分析系统检测黄鳝精子活力。结果表明,在NaCl溶液浓度为0～0.3%时,黄鳝精子激活比例随溶液浓度升高而极显著增加(P<0.01);当NaCl浓度达到0.7%时,精子激活比例、直线运动速度和鞭毛摆动频率均显著(P<0.05)或极显著(P<0.01)降低。扫描电镜观察显示:黄鳝成熟卵卵壳膜上的精孔区呈漏斗状凹陷,其底部中央可见一精孔管外孔,口径约4.22±0.66μm;黄鳝精子入卵速度缓慢,受精过程较长,从精子附着于卵球表面到精孔管完全堵塞,约30s～5min。  相似文献   

6.
对瓦氏黄颡鱼(Pelteobagrus vachelli)精子在不同盐度和pH下的精子活力进行观察,同时研究了精子在4种不同稀释液与2种不同浓度抗冻剂组成的保存液中的超低温冷冻保存,并开展了冻精的授精实验。结果表明,瓦氏黄颡鱼精子浓度为(2.035±0.179)×1012cell·mL-1,在盐度为5.8、pH为7.17时,精子的活力都高达95%。以A液作为稀释液、10%甲醇作为抗冻剂时,冷冻保存精子效果最好,解冻后精子活力为(81.7±0.9)%。用解冻后的精子进行人工授精,获得的受精率为(88.4±2.1)%,孵化率为(74.0±0.8)%;而鲜精受精率为(91.0±0.8)%,孵化率(82±1.6)%,冻精与鲜精均无显著性差异。人工授精实验证明了解冻后的精子能正常用于该鱼的人工繁殖。  相似文献   

7.
刘娟娟  舒德斌  郭柏福  高勇 《水产科技情报》2013,40(3):113-115, 121
为研究超低温冻存时间对史氏鲟精子活力的影响,使用史氏鲟冻精与鳇鱼卵子进行了杂交授精试验。结果显示:经超低温冷冻后的精液,与对照组的鲜精(126.7±9.4 s)比较,其寿命显著下降(冻存5 h的为78.7±4.11 s,336 d的为72.0±4.32 s,702 d的为57.3±2.05 s),且授精率和受精卵的孵化率受到显著影响。冻存5 h的精液,其授精率和受精卵孵化率分别为(73.31±15.27)%和(55.68±9.81)%,与鲜精比较差异不显著(P>0.05),而冻存时间为336 d[授精率(59.20±2.39)%,受精卵孵化率(53.08±1.23)%]和702 d[授精率(25.29±8.26)%,受精卵孵化率(21.38±9.91)%]的精液则差异显著。结果表明,超低温冷冻对史氏鲟精子造成了一定程度的损伤,长时间的超低温冻存会显著降低精子的活力,影响授精率和受精卵的孵化率。  相似文献   

8.
二倍体泥鳅与大鳞副泥鳅杂交能够顺利获得杂交后代,其正反交核型都为（2n=49）,但杂交后代精巢表现出明显的发育迟缓现象,杂交泥鳅自交与回交实验表明,其雄性不可育。为了解二倍体泥鳅和大鳞副泥鳅杂交F1雄性不育的原因,实验通过计算机辅助精子活力分析系统（CASA）、光学显微镜、扫描电镜、透射电镜、流式细胞技术分别对二倍体泥鳅（DD）、大鳞副泥鳅（PP）、其正反杂交F1（DP）和（PD） 4种泥鳅精子的形态结构与活力进行了分析。结果显示,激活30 s时,DD和PP的精子运动率分别为76.50%±0.70%和75.17%±8.60%,极显著高于DP （3.65%±1.75%）和PD （2.68%±0.63%）,且杂交泥鳅的精子的平均运动速度（VAP）、平均曲线速度（VCL）、平均直线运动速度（VSL）等运动参数也极显著低于DD和PP,说明杂交泥鳅精子的活力极其低下。应用流式细胞技术对4种泥鳅精巢内细胞进行倍性鉴定,发现DD和PP精巢内大多为1N精子,而DP和PD精巢内除了正常单倍体精子外,还有大量的2N和4N以及少量的8N细胞。通过扫描电镜和透射电镜...  相似文献   

9.
为建立条纹锯鮨精液超低温冷冻保存方法,实验采用计算机辅助精子分析系统(CASA)分析了采用6种抗冻保护剂(GLY[甘油]、DMSO[二甲基亚砜]、PG[丙二醇]、EG[乙二醇]、METH[甲醇]、DMA[二甲基乙酰胺])在4种浓度(5%、10%、15%、20%,v/v)下对条纹锯鮨精液的冷冻保存效果。结果发现,以HBSS为稀释液,采用程序降温仪分步降温冷冻保存条纹锯鮨精液,37℃水浴解冻后的精子中,15%PG作为抗冻保护剂的精子运动率最高,达到(93.1±0.9)%,与鲜精差异不显著(P0.05),15%PG作为抗冻保护剂的精子水浴解冻后精子的运动速度最高,平均直线速度、平均曲线速度、平均路径速度分别达到了(88.3±0.3)μm/s、(76.2±0.5)μm/s、(86.7±0.7)μm/s,与鲜精差异不显著(P0.05)。在不同种类及不同浓度抗冻保护剂保护下,15%PG作为抗冻保护剂的精子解冻后1 min内运动率变化与鲜精差异不显著(P0.05)。研究表明,15%PG为条纹锯鮨最佳抗冻保护剂,可用于条纹锯鮨精液的超低温冷冻保存。  相似文献   

10.
石鲽、牙鲆精子冷冻保存研究及其在人工杂交中的应用   总被引：15，自引：2，他引：13  
对石鲽(Kareius bicoloratus )和牙鲆(Paralichthys olivaceus)精子冷冻保存技术进行了研究,筛选到一个优良的稀释液MPRS,用MPRS冷冻保存石鲽、牙鲆精子,冻后成活率在70%以上。在石鲽冻精和牙鲆卵的杂交实验中,杂交组受精率是 28 4%±4 55(n=3),孵化率是 42 7%±7 35(n=3),胚胎发育正常;5 000尾杂交鱼苗有102尾成功度过变态期。在牙鲆冻精和大菱鲆卵的杂交实验中,杂交组的受精率只有2 7%,部分受精卵虽能孵化出膜,但仔鱼全为畸形。这两个杂交实验,特别是石鲽冻精和牙鲆卵的杂交实验,证实了冷冻保存的精子完全可以应用在杂交育种工作中。  相似文献   

11.
在6种不同盐度(34、32、30、28、26和22)激活液、3种不同K+浓度(25 mmol/L、30 mmol/L和35 mmol/L)稀释液和不同保存时间(0 h、24 h、48 h、72 h和96 h)条件下,对日本鳗鲡(Anguilla japonica)精子的活力进行观察和测定.结果表明,激活液盐度为30时精...  相似文献   

12.
The common carp, Cyprinus carpio L., sperm motility parameters were analyzed by using computer‐assisted sperm analysis system. The percentage of motile sperm (MOT, %), progressively motile sperm (PRG, %), curvilinear velocity (VCL, µm/sec), average path velocity (VAP, µm/sec), the wobbling index (WOB, %), movement linearity (LIN, %), beat cross frequency (BCF, Hz), and amplitude of lateral head displacement (ALH, µm) were determined. Five activation solutions (As) were used to activate sperm movement. As 1 solution: 68 mM NaCl, 50 mM urea, 0.5% bovine serum albumin (BSA), pH: 7.7, 181 mOsm/kg; As 2 buffer: 100 mM NaCl, 10 mM Tris, 0.5% BSA, pH: 9.0, 199 mOsm/kg; As 3 solution: 86 mM NaCl, 0.5% BSA, pH: 7.4, 167 mOsm/kg; As 4 buffer: 5 mM KCl, 45 mM NaCl, 30 mM Tris, 0.5%, pH: 8.0, 160 mOsm/kg; and As 5 solution: distilled water with the addition of 0.5% BSA, pH: 7.3, <3 mOsm/kg. Among five tested solutions, a buffer with a pH of 9.0 and osmolality of approximately 200 mOsm/kg (As 2) was the most suitable. After its activation, a significant increase in MOT and ALH values was observed, which can be of importance to the effectiveness of egg fertilization .  相似文献   

13.
Experiments were carried out to develop an optimal cryopreservation protocol for tench sperm by testing the fertilizing capacity and motility parameters including progressive motility, curvilinear velocity (VCL) and linearity (LIN) of cryopreserved sperm. Three experiments were designed to this aim: first experiment where we tested the effects of two extenders (sugar‐based Grayling and ion‐based Kurokura 180) and two cryoprotectants (DMSO and methanol) on fertilization and hatching success; second where we tested the effect of cryoprotectant type (methanol or DMSO) in different concentrations (5%, 10% and 15%) on fertilization and hatching success; and third where we tested the effect of two cryoprotectants (methanol and DMSO) on sperm motility parameters (progressive motility, VCL and LIN) after 4 h post‐thaw storage (4°C). Sperm prepared with the sugar‐based Grayling extender displayed better fertilization and hatching rates independently of the applied cryoprotectant most likely due to glucose present which acted as an external cryoprotectant. Concerning cryoprotectant concentrations, the use of 10% methanol yielded the highest fertilization (85 ± 15%) and hatching (80 ± 13%) rates, which were significantly higher than in all other groups. During the post‐thaw storage time, 5% methanol, 10% methanol and 5% DMSO groups had significantly higher motility parameters than other groups and we observed no significant decline in any of the parameters during the storage time. Overall, we found that a sugar‐based extender in combination with methanol as cryoprotectant is suitable for the cryopreservation of tench sperm and allows storage of cryopreserved sperm for up to 4 h post thaw.  相似文献   

14.
The effect of two commercial preparations containing different GnRH analogues with dopamine antagonists on quantitative and qualitative parameters of semen from chub Leuciscus cephalus L. collected in artificial conditions were examined. Semen was collected after the application of [(D‐Ala6, Pro9 NEt)‐mGnRH + metoclopramide] (Ovopel, n = 9), [(D‐Arg6, Pro9 Net)‐sGnR + domperidone] (Ovaprim, n = 9) and from the control group (0.9% NaCl, n = 9). Afterwards, semen volume, sperm concentration, total sperm production and semen pH were determined. Osmolality and pH of seminal plasma were also determined. Using the Computer‐assisted sperm analysis system (CASA), selected sperm parameters such as sperm motility (MOT %), progressively motile sperm (PRG, %), curvilinear velocity (VCL, μm s?1), straight‐line velocity (VSL, μm s?1), movement linearity (LIN, %), wobbling index (WOB, %), amplitude of lateral head displacement (ALH, μm) and beat cross frequency (BCF, Hz) were analysed. While Ovopel can also be used to stimulate chub spermation, the application of Ovaprim was much more effective for obtaining higher amounts of semen.  相似文献   

15.
Five hormonal treatments with human chorionic gonadotropin (hCG) were tested for the induction of maturation and spermiation in male farmed eels. The main aim was to optimize previously used hormonal treatments to achieve shorter induction treatments, longer spermiation periods and/or higher sperm quality. Fish treated for just 3 weeks (treatment E) or until the onset of spermiation (treatment C) showed the worst results, while the treatment consisting of weekly administration of 1.5 IU hCG g?1 fish (treatment A) induced the highest percentage of spermiating males, the highest number of sperm samples and sperm volumes and densities similar to the rest of the treatments (B: half hormone dosage, or D: biweekly administration). Evaluation of the sperm quality was performed by computer‐assisted sperm analysis (CASA), considering the percentage of total motile spermatozoa, the percentage of fast and medium‐velocity spermatozoa, as well as different motility parameters. Sperm samples from A‐D groups showed between 44% and 54% motile spermatozoa, and between 10% and 15% fast spermatozoa, while samples from E‐treated males showed 0% motile cells. No significant differences were found in the spermatozoa straight line velocity (VSL), curvilinear velocity (VCL) or the angular velocity (VAP), neither spermatozoa beating cross frequency (BCF) between A–D groups.  相似文献   

16.

The effect of age on the sensitivity of zebrafish sperm against mercury exposure was investigated in the present study. Although results of the use of sperm from mature individuals for toxicity tests have been published, there is no information about the exact age of the fish in some cases, which can affect the results. During the experiments, pooled sperm was stripped from males of 7, 12, or 18 months of age, divided into 5 sub-groups, diluted with different concentrations of Hg (0, 0.5, 1, 2.5, and 5 mg/L Hg), and incubated for 240 min. The motility parameters of sperm (progressive motility (%), curvilinear velocity (VCL)) were measured by a computer-assisted sperm analysis system, at 30, 120, and 240 min of exposure. Regarding the age, significant differences were found in PMOT (p?=?0.0267) as well as in VCL (p?=?0.0004) among the three different age groups. The different concentrations of Hg also caused significant differences. The most significant differences in PMOT were between the 7- and 18-month-old groups; these differences were observed at 0.5, 1 and 2.5 mg/L Hg at 30 min, at 0.5 and 1 mg/L at 120 min, as well as at 0.5 mg/L at 240 min. In VCL the most significant differences were found between the 7- and 12-month-old groups; significant differences were found at each tested concentration at 30 min as well as at 0.5 and 2.5 mg/L at 240 min. According to the results, the age of zebrafish negatively influences the sensitivity of its sperm. This may concern not only toxicology tests but many techniques in fish breeding where the sperm is treated before use (cryopreservation, pressure shock, etc.).

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17.
A study on Chlamys nobilis sperm cryopreservation by a programmable freezing method was conducted under laboratory condition. Four cryoprotectant agents (dimethyl sulfoxide [DMSO], methanol [MET], propanediol[PG] and ethylene glycol [EG]) and four concentrations (5%, 10%, 20% and 30%) were evaluated for their ability to retain sperm motility, movement characteristics and fertility. Results showed that cryopreserved sperm total motility produced by DMSO and MET at 5%, 10% and 20% were higher than other cryoprotectant treatment groups (CPA groups), as well as rapid sperm percentage. The curvilinear (VCL) and straight line (VSL) velocity produced by DMSO at 5% significantly higher than other CPA groups (p < 0.05), while no significant differences were found for average path (VAP) velocity. The lateral head displacement (ALH) in all CPA groups was similar and without significant difference (p > 0.05), as well as the beat‐cross frequency (BCF). A significant higher fertilization rate was produced in DMSO than that in MET at same concentration (p < 0.05), and no significant differences were found for differing concentrations of the same cryoprotectant (p > 0.05). Overall, 5%‐20% DMSO was more suitable for Chlamys nobilis sperm programmable cryopreservation when the calcium‐free Hanks’ balanced salt solution was used as the extender, and 10°C/min from 0°C to ?80°C was used as freezing rate. The findings presented in this study will benefit conservation programs for Chlamys nobilis.  相似文献   

18.
The effectiveness of applying Ovaprim [(D-Arg6, Pro9NEt)-sGnRH + domperidone] and Ovopel [(D-Ala6, Pro9NEt)-mGnRH + metoclopramide] to male barbel Barbus barbus (L.) 6, 12 and 24 h after hormonal stimulation was analyzed. The control group (Control) during each time interval was stimulated with 0.9 % NaCl. Milt was collected from seven fish only once (n = 7) for Ovopel, Ovaprim and Control group in order to determine total volume of milt, volume of milt per kg of body weight, sperm concentration, total sperm production, seminal plasma osmotic pressure, pH of milt and pH of seminal plasma. Woynarovich’s solution (68 mM NaCl + 50 mM urea) with the addition of 0.5 % BSA (pH 7.7; 181 mOsm kg?1) was used as the activating liquid. Selected parameters of sperm motility (MOT %) and progressively motile sperm (%), curvilinear velocity (VCL, μm s?1), straight-line velocity (μm s?1), movement linearity (%), wobbling index (%), amplitude of lateral head displacement (μm) and beat cross frequency (Hz) were determined using the Computer-assisted sperm analysis system. A time of 6 h proved to be too short to obtain milt from barbel following hormonal stimulation with Ovaprim and Ovopel. Extending the time to 12 h, however, resulted in 100 % spermiation in males, regardless of hormonal preparation used for stimulation. The stimulation of spermiation in barbel is best performed using Ovopel 12 h upon application. Extending the latency period to 24 h following the application of this preparation results in a significant decrease in the volume of milt obtained, sperm count and motility parameters, including MOT and VCL, which may influence sperm fertilization ability.  相似文献   

19.
The effect of heavy metals on the motility parameters of common carp sperm was investigated. In vitro test systems are widespread in ecotoxicology, and fish sperm can be a suitable model. For this reason, studies had been carried out in this topic; however, the published methods are not standard in several aspects (donor species, measured endpoint, etc.). In this study, a previously published toxicology-aimed sperm analysis protocol was tested to examine the effect of heavy metals (arsenic, cadmium, chromium, copper, mercury, nickel, zinc,) on common carp sperm. According to our results, PMOT is the most sensitive of the investigated parameters: dose-response was observed in case of each metal at low concentrations, already after 30 min of exposure. VCL was less sensitive: lower effects were observed at the same concentrations compared to PMOT. Among the examined parameters, LIN was the least affected: a dose-response was observed only in case of arsenic and mercury. The same sensitivity of motility parameters was observed on zebrafish sperm previously. Moreover, we found that PMOT, VCL, and LIN of common carp sperm were affected at the same concentrations as it had been observed in zebrafish, when the identical analytical protocol was applied. The only exception was As3+, where common carp sperm proved to be more sensitive: lower concentrations already reduced its motility parameters. Consequently, PMOT of common carp sperm is an accurate and fast bioindicator of aquatic pollution.  相似文献   

20.
Basic characteristics of the European smelt (Osmerus eperlanus) sperm are reported here for the first time. Smelt spermatozoa had a bullet-shaped head (1.42 μm length), a short midpiece and a long flagellum (27.72 μm). Two mitochondria were located along the flagella. The volume of smelt sperm was small (30-60 μl) and the duration of sperm motility was short (22 s in distilled water and 41 s in 20 mM sodium bicarbonate solution). Sodium chloride at concentrations ranging from 0-120 mM did not influence the percentage of motile spermatozoa but caused a steady increase in the duration of sperm movement. Potassium ions clearly reduced the percentage of motile sperm at a concentration of 10 mM. Spermatozoa were motile through a broad range of pH with an optimum from 7.5 to 8.5. Testicular spermatozoa had a different motility pattern compared to stripped spermatozoa (the latter exhibiting a reduction of motile spermatozoa by 30%, lower ALH and VCL and higher LIN and VSL). These results indicate that maturation of smelt spermatozoa occurring in sperm ducts is related not only to an increase of the percentage of motile spermatozoa but also to changes in the sperm motility pattern. Maintaining males with females resulted in stimulation of milt production. Our results indicate that European smelt sperm characteristics are similar to those of ayu (Osmeridae).  相似文献   

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