共查询到18条相似文献，搜索用时 171 毫秒
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棘胸蛙性腺发育及繁殖 总被引：1，自引：0，他引：1
棘胸蛙俗称石蛙、石鳞、水鸡等，属大型经济食用蛙，具有很高的食用和药用价值，本文作者在对其生物学特性进行研究的基础上，从现有养殖和天然采集的棘胸蛙中，观察其性腺发育的不同阶段，并采取不同季节、不同激素、自然繁殖与人工催产进行孵化试验，现报告如下：一、试验材料与方法１．蛙池的建造产卵池４米×４米和１米×１米两种，池埂９０厘米，水深１５～２０厘米，四周砖砌水泥粉刷，池底铺鹅卵石或一层砂石厚２厘米，池中设石头垒成的岛，大池种有石菖蒲。产卵池兼作孵化池和蝌蚪培育池。２．养殖水源（１）水温：繁殖水温１８～２… 相似文献
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2009年9月26日—10月6日对人工养殖环境棘腹蛙(Paa boulengeri)非繁殖期摄食行为进行了观察。结果显示:非繁殖期,棘腹蛙幼蛙早于成蛙出来觅食,雄蛙早于雌蛙出来觅食;棘腹蛙摄食高峰期出现在19:00—20:00。在整个摄食过程中,棘腹蛙的行为可划分为静止、跳跃、转向、捕食、侵占、驱赶、打斗、爬行。棘腹蛙幼蛙与成蛙、雌性成蛙与雄性成蛙之间在摄食行为上存在差异,其中幼蛙与成蛙之间在跳跃、转动、捕食、侵占、驱赶、打斗行为上存在显著差异(P<0.05);成年雌蛙与雄蛙之间在侵占、驱赶、打斗行为上存在显著的差异(P<0.05)。 相似文献
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美国青蛙，学名沼泽绿蛙（Ranagvylio），是我国有关部门继牛蛙之后引进的又一大型蛙类，属两栖纲、无尾目、蛙科、蛙属。该蛙肉质细嫩鲜美，蛋白质含量高，是近年来餐桌上日渐增多的食品。1生长繁殖习性及对生态环境的要来影响美蛙养殖的主要环境因子包括温度、湿度、光照、水质、天敌等。1．l温度水温达18C以上，每年5～7月美蛙开始抱对、产卵、排精、孵化、变态等繁殖活动，水温降至5”C以下，闭口绝食，呼吸次数减少，耗氧量降低。美蛙生长发育与繁殖的适宜温度为18”C～32C，在太阳的直射下随即钻入荫蔽处。蛙的体温可以高出周围环境… 相似文献
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鄂西棘腹蛙的胚胎发育 总被引：4，自引：0，他引：4
鄂西棘腹蛙的胚胎发育杨广，刘金兰，袁凤霞（湖北农学院水产系）（华中农业大学水产学院）蛙类的胚胎发育在过去有过一些研究，然而有关武陵山区棘腹蛙（Ｒａｎａｂｏｕｌｅｎｇｅｒｉ）的尚未见报道。为对棘腹蛙人工养殖提供可行性技术，研究其胚胎发育的规律是必要的。... 相似文献
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2005~2007年春、夏期间,在浙江南麂岛开展了真蛸亲体培育、产卵及孵化的试验研究。结果表明:亲蛸培育成活率为77.5%~95.5%,平均产卵率为68.0%~83.3%。不搭配雄体产卵率为65.0%,搭配一定比例的雄体后产卵率达92.5%,最高达100%。不同附卵器附卵效果以方形鲍鱼箱为最好,圆形鲍鱼皮桶次之,扇贝笼最差。在南麂海域暂养在网箱中的真蛸当水温上升到13.5℃以上时就开始有少量产卵,多数开始产卵在16.0℃左右,主要产卵期在4~6月。不同个体真蛸的产卵量变化很大,少者只有22 632粒,多者达170 684粒,平均102 665粒,平均每颗卵粒重量在1.670~2.207 mg之间,大小为长2.8~3.1 mm、宽0.915~0.950 mm。在水温13.5~28.0℃范围内,真蛸卵可以正常孵化,孵化率达60.0%~80.0%,超过28℃时孵化率明显下降。真蛸卵的孵化时间较长,至少需要20 d以上。孵化时间长短与水温关系密切,水温越高,孵化时间越短。孵化期间平均水温16.5℃,整个孵化时间长达47 d。当孵化期间平均水温为21.6℃时,从产卵到稚蛸出膜大致需要25 d左右。此外,还发现亲蛸护卵可以减少疾病,提高孵化率,本文也论述了有关其对疾病防治方面的探索。 相似文献
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2011-2013年,利用野生和经人工驯养的野生斑鳜（ Siniperca scherzeri ）亲鱼进行人工繁殖试验。结果表明：采用地欧酮（ DOM）和促黄体素释放激素类似物（ LHRH -A3）组成的混合药物催产,在17．8-25．4℃水温条件下,斑鳜亲鱼群体的效应时间为24-46．5 h,存在产卵高峰期,产卵持续时间一般长达1-1．5 d。自然产卵高峰期的受精率较高,最高可达80%以上,早期和晚期的较低;而孵化率差异不大,最高可达86．7%。人工授精的受精率可达91．3%,孵化率可达89．3%。未经人工驯养的野生斑鳜亲鱼人工催产的受精率、孵化率都明显低于经人工驯养的。 相似文献
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为提高凡纳滨对虾受精卵孵化效率,改进优化了1种受精卵流水孵化装置,可有效地进行凡纳滨对虾无节幼体集约化高密度生产。流水孵化受精卵的孵化密度在1 000万~6 000万粒/m3,平均孵化率在85.0%~92.7%。流水孵化的孵化率与常规的产卵池孵化无显著差异,但孵化出的无节幼体的携菌量和损伤率、黏脏率明显低于产卵池孵化(P<0.05);同时,为筛选优质的无节幼体,采用光诱、流水清洗等方法处理无节幼体,结果表明,流水清洗可显著降低无节幼体的损伤率、黏脏率和细菌携带量(P<0.05),有效提高无节幼体的生物安全及育苗成活率。 相似文献
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Spawning behaviour of Penaeus (Fenneropenaeus) merguiensis de Man and the effect of light intensity on spawning 总被引：2，自引：0，他引：2
An experiment was conducted to investigate the effect of light intensity just prior to and during spawning of Penaeus (Fenneropenaeus) merguiensis de Man in the laboratory. Neither the presence of light nor light intensity (0, 10 and 1100 lux) had a significant effect on the spawning process or hatching rate in P. merguiensis. Difference in the percentage of spawners, percentage of incomplete spawning, fecundity and hatching rate were all insignificant (P > 0.05) among the three light treatments. However, spawning was delayed (up to 21 min on average) under 1100 lux with a high percentage of incomplete spawning, compared with the Control (0 lux). For the first time, spawning behaviour of P. merguiensis was observed and fully described. The spawning process can be divided into four phases: dormant, pre‐spawning, spawning and post‐spawning by distinct behaviour of prawn broodstock. The dormant phase was characterized by a quiescent and non‐feeding period, whereas movement of prawn broodstock was active during the pre‐spawning and post‐spawning phases. Depending on the individual, spawning was completed within 3–5 min. Prawns often stayed still on the water surface during spawning with occasional manoeuvres to change the position. After a short rest at the termination of the spawning phase, prawn broodstock re‐exhibited active movement as in the pre‐spawning phase, but showing conspicuous care to the deposited eggs. The role of light in controlling ovarian development and spawning, and the behaviour of prawn broodstock in relation to maximizing fertilization rate are discussed. 相似文献
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2012—2015年,采用室内循环水养殖系统开展了长鳍吻鮈(Rhinogobio ventralis)亲鱼培育、人工催产和孵化技术研究。结果显示:3年间长鳍吻鮈均能在循环水养殖系统中培育成熟,2014年5月—2015年4月间培育存活率和成熟率最高,分别为85.3%~100%和77.3%~100%;对培育成熟的亲鱼进行了4种不同外源激素(PG、HCG、LRH-A2、LRH-A2+DOM)催产实验,结果为LRH-A26μg/kg+DOM 5 mg/kg合剂催产率最高,达88.3%;14、16、18、20和22℃5个温度组的受精卵孵化实验结果显示,孵化时间(H)与温度(T)呈显著负相关关系(H=0.573T2-30.393T+418.178,R2=0.982,P0.01),18℃和20℃组的孵化率分别为54.27%和56.07%,显著高于其他各组,表明长鳍吻受精卵适宜孵化温度范围为18~20℃。 相似文献
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2008年4月16-28日在浙江湖州地区进行了花于水温15℃条件下的人工催产生产性试验。用常规催产剂和方法,催产花亲鱼540尾,其中雌亲鱼355尾、雄亲鱼185尾。试验结果表明:排卵率为91.5%,催产效应时间为29.5 h,群体排卵时间为2.5 h;受精率为98.7%;孵化鱼苗(下塘鱼苗)380万尾。与常规生产水温17～18℃以上催产情况比较,在水温15℃条件下,花也完全可以进行人工催产;除效应时间和孵化时间延长及卵膜难以溶解外,其排卵率、受精率、群体排卵时间和孵化率等均无明显差异。 相似文献
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Md. Moshiur Rahman Ripon Biswas Litan Gazi Shaikh Tareq Arafat Md. Mostafizur Rahman Md. Asaduzzaman Sheikh Mustafizur Rahman Md. Nazmul Ahsan 《Aquaculture Research》2020,51(6):2275-2290
Multiple spawnings are special reproductive tactics that many fish evolved to obtain different types of direct and/or indirect spawning benefits. This has led to two pertinent questions: (a) what types of benefit does a commercially important fish provide during multiple induced spawnings annually? and (b) is there any trade‐off between traits during these spawnings? To address these questions, the present study was carried out with two separate experiments during two spawning events of an Indian major carp (Catla catla) to assess: (a) male's spawning performances and (b) female's spawning performances. The male's spawning data revealed that they produced significantly higher amount of milt and hatchlings during the first spawning, while they significantly reduced hatchling deformation rate, enhanced offspring survival rate and enlarged offspring body size during the second spawning. The female's spawning information unveiled no significant differences in total egg weight, hatching rate and hatchling deformation rate between the first and second spawning. However, females had significantly higher offspring survival rate during the first spawning and enhanced offspring body size during the second spawning. Interestingly, the analysis of trait associations revealed that males allocated energy with a trade‐off between milt weight and offspring survival rate, whereas females showed a trade‐off between hatching rate and offspring survival rate. Thus, the study provides some important information for carp breeders and associated stakeholders to know which spawning season is preferable for the higher production of eggs, milt and good quality larvae. 相似文献
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2007-2011年,在34口面积共为100．17 hm2的土池中将阴干的青蛤挂于竹筏上进行流水刺激,催产63次,获得受精卵8150．55-108粒, D形幼虫1970．74×108只,孵化率为24．18%;幼虫正常发育变态为稚贝423．85-108粒,变态率达21．51%;培育到壳长0．50 cm的苗,收获377．02-108粒,育成率达88．95%;平均产量达3．76-108粒/hm2,达到规模化生产要求。 相似文献