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   幼体生长 在 水产和渔业 分类中 的翻译结果: 查询用时:1.884秒
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幼体生长    
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  larval growth
    The larval growth specificity and feeding observation of Chinese mitten crab
    中华绒螯蟹幼体生长特性及投饵量的观察
短句来源
    The authors have found out the time-series of the spawning season,embryonic development and larval growth of Strongylocentrotus nudus,has a good command of induced spawning and artificial insemination and put forward a series of technical measures for rearing larval and juvenile sea urchins.
    作者摸清了光棘球海胆的繁殖季节、胚胎发育及幼体生长时序,掌握了诱导产卵和人工授精技术,对浮游幼体及稚海胆的培育提出了一系列的技术措施.
短句来源
    ,in the range of 25℃ to 31℃ the larval growth increased with increasing temperature,and in extreme temperature the larval growth was curved down in an obvious extent.
    在高低极端温度下, 胚胎发育畸形而死亡。 幼体生长发育与温度的关系呈Logitic曲线关系, 即25℃~31℃时, 幼体生长速率随温度升高而加快;
短句来源
  larval growth
    The larval growth specificity and feeding observation of Chinese mitten crab
    中华绒螯蟹幼体生长特性及投饵量的观察
短句来源
    The authors have found out the time-series of the spawning season,embryonic development and larval growth of Strongylocentrotus nudus,has a good command of induced spawning and artificial insemination and put forward a series of technical measures for rearing larval and juvenile sea urchins.
    作者摸清了光棘球海胆的繁殖季节、胚胎发育及幼体生长时序,掌握了诱导产卵和人工授精技术,对浮游幼体及稚海胆的培育提出了一系列的技术措施.
短句来源
    ,in the range of 25℃ to 31℃ the larval growth increased with increasing temperature,and in extreme temperature the larval growth was curved down in an obvious extent.
    在高低极端温度下, 胚胎发育畸形而死亡。 幼体生长发育与温度的关系呈Logitic曲线关系, 即25℃~31℃时, 幼体生长速率随温度升高而加快;
短句来源
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  larval growth
Considerable differences were found in salinity tolerance of adult periwinkles, larval growth and survival, and morphology of the egg capsules.
      
A temperature of 20°C promoted an enhanced larval growth and development.
      
Though a temperature of 20°C caused enhanced larval growth, the temperature was not optimal, while its effect caused quality diversity of larval development, owing to the difference in their growth rates.
      
In turn, anomalies of the mouthparts have an effect on the rate of larval growth and development and on the survival of tadpoles in the period of the metamorphic climax.
      
None antiparasitic effect of ABCD on larval growth was determined.
      
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  larval growth
Considerable differences were found in salinity tolerance of adult periwinkles, larval growth and survival, and morphology of the egg capsules.
      
A temperature of 20°C promoted an enhanced larval growth and development.
      
Though a temperature of 20°C caused enhanced larval growth, the temperature was not optimal, while its effect caused quality diversity of larval development, owing to the difference in their growth rates.
      
In turn, anomalies of the mouthparts have an effect on the rate of larval growth and development and on the survival of tadpoles in the period of the metamorphic climax.
      
None antiparasitic effect of ABCD on larval growth was determined.
      
更多          
  larvae growth
However, the inhibitory effect of AA on larvae growth could be suppressed by the dietary addition of DHA (at a level of 21.6% of the total fatty acids in enrichment lipids).
      
Physiological studies with FTC and THW larvae showed that consumption of leaf tissue from the transgenic lines is deleterious to larvae growth, apparently due to a postingestive mechanism.
      
  其他


The gametophytes of Macroeystis pyrifera were cultured at 3000 Lux and divided into 6 groups according to the photoperiod of 4L:20D、8L:16D、10L:14D、 18L:6D and 24L:0Dhr per day.The Macrocystis sporophytes were divided into 3 groups according to different light intensities of 500,2000 and 3000 Lux.Water temperature was 10—12℃.The results are as follows. 1.The photoperiods didn't have much effect on embryonic spore's germi- nation and gametophytes formation.Suitablephotoperiod of growth was 8—14hr for female gametophytes...

The gametophytes of Macroeystis pyrifera were cultured at 3000 Lux and divided into 6 groups according to the photoperiod of 4L:20D、8L:16D、10L:14D、 18L:6D and 24L:0Dhr per day.The Macrocystis sporophytes were divided into 3 groups according to different light intensities of 500,2000 and 3000 Lux.Water temperature was 10—12℃.The results are as follows. 1.The photoperiods didn't have much effect on embryonic spore's germi- nation and gametophytes formation.Suitablephotoperiod of growth was 8—14hr for female gametophytes and 8—24hr for male gametophytes.Suitable photoperiod of development for female gametophytes was 8—14hr per day,the optimum photoperiod was 10hr.Suitable photoperiod of development for malegametophy- tes was 8—24hr per day. 2.Illumination time required by the growth of the young sporophyte increased with a decrease of light intensity.At 3000 Lux,suitable photoperiod for the growth of young sporophyte was 8—12hr per day,with the optimum photoperiod of 10hr.At 2900 Lux,the illumination of a little less than 16hr was appropriate.At 500 Lux,the optimtm photoperiod for growth of young sporophyte was 20hr.Too short illumination time would inhibit the growth of young sporophyte,while too long illumination time would seriously bring about plant's colour changing white or death. 3.We first found that the growth of young sporophyte at 500 Lux and 20 illumination hours grew much faster in length and width than that at 3000 Lux and 10 illumination hours.As mentioned above,we think it is suitable for us to choose a lower light intensity and longer illumination time during eluturing young sporophytes.Hence it is optimal to culuture them at 500Lux and 20 illumination hours per day.

巨藻 Macrocystis pyrifera 配子体实验是在光强3,000勒下进行,以每日光照时间分为4、8、10、14、18和24小时等6组,孢子体实验以光照强度分为500、2,000、3,000勒3组。水温均为10~12℃。所得结果: 1.在光强3,000勒下,光照时间对巨藻胚孢子萌发和配子体形成的影响不大,每日光照8~14小时是雌配子体生长的适宜光照时间,雄配子体为8~24小时。每日光照8~14小时是巨藻配子体发育的适宜光照时间,每日光照10小时为最佳光照。雄配子体发育的适宜光时为每日光照8~24小时。2.巨藻幼孢子体所需要的光照时间,随光强的减弱而相应地延长。幼孢子体生长在3,000勒下,以每口光照8~12小时为宜,10小时为最适光照。在2,000勒下,每日光照略短于16小时为宜。500勒下,以光照20小时为最适光照。过短的光照限制了幼体的生长,光照过长引起严重白化死亡。3.首次发现巨藻幼孢子体在光强500勒每日光照20小时下,其长宽生长速度大大超过生长在光强3,000勒,每日光照10小时的藻体。据此认为,对巨藻幼孢子体培养的光照强度和光照时间,选用低光强长光照为宜,以500勒每日光照20小时最好。

The reproduction Period of Atrina (Servatrina) pectinata (Linnaeus) is from May to September, with the peak period in July. In the reproduction period, ripen spermatozoon and egg can be obtained by artificial inducement. The embryo may develop normally to the stage of D larval stage in water of 23—30℃. Being fed with a mixture of Chaetoceros calcitrans, Dicrateria zhanjiangensis and platymonas subcordiformis, the larvae may develop into spats succesively after 23 to 47 days of cultivation in water of about 28—30℃...

The reproduction Period of Atrina (Servatrina) pectinata (Linnaeus) is from May to September, with the peak period in July. In the reproduction period, ripen spermatozoon and egg can be obtained by artificial inducement. The embryo may develop normally to the stage of D larval stage in water of 23—30℃. Being fed with a mixture of Chaetoceros calcitrans, Dicrateria zhanjiangensis and platymonas subcordiformis, the larvae may develop into spats succesively after 23 to 47 days of cultivation in water of about 28—30℃ and 28.0‰. After 40 to 60 days of cultivation, the spats will be 3367.3×1606.9 to 7767.9×3270.0 μm (length×height). In the process of cultivation, observations have been made on the development of "larval membrane", vertical distribution of larvae, the features of shell evolution in the growth and develoPment and, the attachment habits of the spats. All these observations may provide scientific basis for artificial sparing of Atrina (Servatrina) pectinata (Linnaeus).

本文就櫛江珧的繁殖习性、人工催产、胚胎和幼体生长发育进行初步探索,并对幼虫形成“幼虫膜”、幼虫垂直分布、幼虫发育过程中壳形变化特征及稚贝的附着习性等进行了观察。

The experiments on effects of temperature on larval survival anddevelopment of Scylla serrata were conducted by laboratory maintaining larvaefrom hatching to first juvenile crab stage under a set of constant temperatures(5℃--35℃). The results showed that 25--30℃ were optimum for zoea. When tempe-rature was 20℃, the zees--1 could survive as long as 16 days; in the meanwhiletemperature was≥35℃, no larvae could survive more than 5 days, mass mortalitywas found in above both cases, and at 35℃, no larvae could molt...

The experiments on effects of temperature on larval survival anddevelopment of Scylla serrata were conducted by laboratory maintaining larvaefrom hatching to first juvenile crab stage under a set of constant temperatures(5℃--35℃). The results showed that 25--30℃ were optimum for zoea. When tempe-rature was 20℃, the zees--1 could survive as long as 16 days; in the meanwhiletemperature was≥35℃, no larvae could survive more than 5 days, mass mortalitywas found in above both cases, and at 35℃, no larvae could molt into zees--3; at 18and 20℃, all larvae died within zoea--3. The zoea--1 was more tolerant to lowertemperatures (≤20℃) than successive stages and the survival rate for zoea--1 washightest at 25℃, but after zoea-1, the mortality rates were relatively lower at 28℃and 30℃. From hatching to metamorphosis finished,the duration of mean develop-ment at 30℃ was only 17 days, whereas it was 23 days at 25℃. Metamorphosis from zoea to megalopa was adversely effected when tempera-ture was ≥30℃, whereas successful metamorphsis was observed at 20--27℃. How-ever, after metamorphosis, data show that megalopa is more tolerant to highertemperatures than zoea. At 35℃, no adverse effect on larvae survival was foundwhile the duration of megalopa was greatly shortened (at 35℃, 6--8 days; at 20℃,22 days).Higher rate of "extra instar" (zoea--6)appeared at 25℃ which is suboptimalfor later zoeal instars.

锯缘青蟹溞状幼体生长发育的适温范围为25—30℃。在该范围内,随着幼体发育,其生存最适温度逐渐上升。各期溞状幼体的发育均随温度的提高而加快,从孵化至第一次变态,30℃时平均发育时间比 25℃时短 6天。温度对溞状幼体的变态过程亦有明显影响,水温大于或达到 30℃时不利于变态的进行,但变态后的大眼幼体对高温适应力增强,35℃时仍可正常生长发育。不同批孵化的幼体在相同温度下存活与发育有明显差异。在对后期溞状幼体相对不适的 25℃下,溞状幼体发育期数变异的出现率较高。

 
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