A study of first-feeding herring (Clupea harengus L.) larvae during the period 1985-1993     

Fossum  Petter 《ICES Journal of Marine Science》1996,53(1):51-59

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Effect of strong winds on the nutritional condition of anchovy (Engraulis encrasicolus L.) larvae in the Bay of Biscay, Northeast Atlantic, as inferred from an early field application of the DNA/C index     

Bergeron  Jean-Pierre 《ICES Journal of Marine Science》2000,57(2):249-255

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坚强芽孢杆菌对凡纳滨对虾幼体变态的影响   总被引：2，自引：0，他引：2  

温崇庆  何红  薛明  刘慧玲  周世宁 《热带海洋学报》2006,25(2):54-58

研究比较了坚强芽孢杆菌Bacillus firmusZOU4菌株对数期细胞和孢子在不同加菌量、次数及不同幼体期加菌对凡纳滨对虾Litopenaeus vannam ei幼体无节Ⅲ期到溞状Ⅱ期变态的影响。结果表明,多次加入高数量对数期细胞或孢子对无节Ⅲ期到溞状Ⅱ期幼体变态具有极显著(p<0.01)促进作用,且对数期细胞效果明显高于孢子,溞状Ⅰ期之前比其后加菌效果更显著(p<0.05),但对无节Ⅲ期变态到溞状Ⅰ期影响不明显(p>0.05)。  相似文献   

海带配子体无性繁殖(克隆)技术研究与应用进展     

杨官品  李晓捷  丛义周  曲善村  李志凌  张壮志  罗世菊 《中国海洋大学学报(自然科学版)》2007,37(4):569-572

海带具有异型世代交替,其配子体在单独分离培养时可进行营养生长,形成无性繁殖系(克隆)。本文简要回顾了海带配子体克隆技术研究与应用的历程,综述海带配子体克隆在海带种质资源保存、海带生理和遗传学研究及海带育种和苗种繁育中的应用现状。  相似文献   

栉江珧工厂化育苗技术研究     

于瑞海  王昭萍  李琪  郑小东  周维武  王世党 《中国海洋大学学报(自然科学版)》2007,37(5):704-708

通过亲贝强化营养和升温促熟培育,提早栉江珧人工育苗时间;合理控制幼虫密度,前期4~5个/mL,后期2~3个/mL,严把饵料质量关,投喂新鲜无污染的饵料,科学换水与充气,及时分级筛选等系列技术措施,克服栉江珧育苗中易发生幼虫粘连的技术难题,使育苗生产顺利进行;开展了多种附着基投放的采苗方法试验,选出了铺砂浮动网箱采苗和网袋装网片附着基和细砂吊在池中采苗2种比较理想的采苗方法,提高稚贝的附着变态率,其附着变态率达30%以上,促进稚贝的生长和成活,在1 000 m3水体中育出2 mm以上的稚贝1.096亿粒。  相似文献   

鲍育苗生物学中饵料硅藻的相关研究进展   总被引：3，自引：0，他引：3  

徐力文  刘广锋  王江勇 《海洋科学进展》2006,24(4):611-617,618

底栖硅藻是鲍育苗阶段不可缺少的饵料,也是诱导鲍浮游幼体附着和变态的重要物质,硅藻的种类、营养价值、生态状况等对幼体的附着变态及其后以微藻为饵料阶段的生长率和成活率都有至关重要的影响。总结近10a国内外与饵料硅藻相关的研究概况,包括硅藻对鲍附着变态、生长率和成活率的影响;鲍幼苗饵料转化与消化器官发育的关系;影响硅藻营养的生理生化因子;与鲍幼苗掉板死亡相关的藻类研究等,为鲍育苗生物学的研究提供借鉴和参考。  相似文献   

Body weight, sexual maturity, and spinal deformity in strains and families of Atlantic cod (Gadus morhua) at two years of age at different locations along the Norwegian coast     

Kolstad  K.; Thorland  I.; Refstie  T.; Gjerde  B. 《ICES Journal of Marine Science》2006,63(2):246-252

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Size of flatfish larvae at transformation, functional demands and historical constraints     

J. W. M. Osse  J. G. M. Van den Boogaart 《Journal of Sea Research》1997,37(3-4)

At hatching the larvae of flatfish closely resemble the bilateral symmetric larvae of other teleosts, especially perciforms. Literature data show that transformation to asymmetric benthic juveniles normally occurs at body lengths between 10 and 25 mm. Unexpectedly, minimal size at its completion (including eye migration) can be 4.1 mm SL and maximal size is over 72 mm. In this paper we consider the functional requirements for a successful switch from a symmetric pelagic larva to a typical asymmetric juvenile benthic flatfish partly based on evidence from other teleosts. The unfavourable period of eye migration and transition to a benthic habitat requires some food reserves and rewiring and/or recalibration of vision and gravity-associated structures utilised previously by the still symmetric larvae for e.g. food detection. Binocular fixation of the prey probably occurs in that stage. Critical or sensitive periods occurring during development of fish larvae suggest that a completely functional symmetric stage of development must precede transformation. The normal size range in flatfish larvae at transformation seems to confirm our considerations. Recent data on temperature effects during development provide an explanation for metamorphosis at the minimal size. Some evidence for paedomorphic heterochrony in flatfish larvae is presented.  相似文献   

唐山南堡开发区排污海域沉积物中重金属含量的调查研究     

陈爱萍  尹毅  秦学祥  仲维妮 《海洋科学进展》1997,(2)

本文从唐山南堡开发区污水排海工程建设的需要出发，对排污海域沉积物中Ｃｕ，Ｐｂ，Ｃｄ，Ｈｇ，Ｚｎ和Ｃｒ６种重金属的含量及分布特征进行了调查研究，为污水排海工程的建设及开发区沿海海洋环境保护提供了基础性研究资料。  相似文献   

盐度对双棘黄姑鱼仔鱼活力及仔稚鱼生长的影响   总被引：8，自引：0，他引：8  

林向阳  刘伟斌  叶金聪 《台湾海峡》2005,24(3):351-355

分别用不同盐度梯度海水对双棘黄姑鱼仔鱼进行饲养试验。结果表明：盐度为17．0．22．0、27．0．31．0～33．0的4个试验组仔鱼的不投饵存活系数分别为5．38、7.35、6.46、6．18；各盐度组仔稚鱼的生长速度没有显著差异（P〉0．05），各组仔鱼经25d的培养，其平均全长为18．8～19．2mm；盐度22．0及27．0的海水中仔稚鱼呈较高的存活率，各盐度组的平均存活率为36、0％、48．5％、46．7％和39．2％．  相似文献