The hydrogen peroxide impact on larval settlement and metamorphosis of abalone Haliotis diversicolor supertexta     

张祥景  杨志会  蔡中华 《中国海洋湖沼学报》2008,26(3)

Abalone Haliotis diversicolor supertexta is an important economic mollusk.The settlement and metamorphosis are two critical stages during its development period,which has direct influence on abalone survival and production.The influence of reactive oxygen species(hydrogen peroxide) on abalone embryo and juvenile development were examined in this study.Larvae of Haliotis diversicolor supertexta were induced to settlement and metamorphose by exposure to seawater supplemented with hydrogen peroxide.They had the best performance at 800 μmol/L.The concentration of 1 000 μmol/L or higher was toxic to the larvae,as the larvae could settle down only at benthic diatom plates without complete metamorphosis.In addition,H2O2 adding time was critical to the larval performance.24h after two-day post-fertilization was proved to be the optimal adding time.In this paper,two action mechanisms of hydrogen peroxide are discussed:(1) hydrogen peroxide has direct toxicity to ciliated cells,thus cause apoptosis;(2) hydrogen peroxide,as a product from catecholamines' autoxidation process in vivo,can reverse this process to produce neuro-transmitters to induce abalone metamorphosis.  相似文献   

饥饿对日本囊对虾幼体发育、摄食及存活的影响   总被引：4，自引：0，他引：4  

李静  马甡 《海洋湖沼通报》2005,(2):61-65

本实验研究了饥饿对日本囊对虾蚤状幼体Ⅰ期发育、摄食及存活的影响。结果表明．饥饿对对虾幼体的变态存活有显著影响，饥饿时间与变态率及变态时间呈线性关系．饥饿对日本囊对虾幼体首次摄食影响显著。本实验中，日本囊对虾的蚤Ⅰ幼体的PNR100应为40h。  相似文献   

不同浓度的KCI对海湾扇贝眼点幼虫附着变态作用的研究   总被引：5，自引：0，他引：5  

于瑞海  王如才  田传远  王昭萍  董庆春 《海洋湖沼通报》2001,(4):28-32

本文在有附着基的条件下进行KCI溶液对海湾扇贝眼点幼虫的附着变态研究，并观察春成活情况。结果表明：KCI对眼点幼虫的诱导效应随KCI浓度和作用时间的增大而增大，但过高则抑制眼点幼虫的附着变态,而成活率则随浓度增加和处理时间延长而降低，其中30mmol/L效果最好。并进行了小型生产试验，效果较好。  相似文献   

Sea water environment copper requirement of egg hatching and naupliar metamorphosis of Peaneus chinensis     

Yuan Youxian  Qu Keming  Liu Libo  Gao Chengnian  Zhang Duxi 《海洋学报(英文版)》1995,14(3):421-428

ＳｅａｗａｔｅｒｅｎｖｉｒｏｎｍｅｎｔｃｏｐｐｅｒｒｅｑｕｉｒｅｍｅｎｔｏｆｅｇｇｈａｔｃｈｉｎｇａｎｄｎａｕｐｌｉａｒｍｅｔａｍｏｒｐｈｏｓｉｓｏｆＰｅａｎｅｕｓｃｈｉｎｅｎｓｉｓ￥ＹｕａｎＹｏｕｘｉａｎ；ＱｕＫｅｍｉｎｇ；ＬｉｕＬｉｂｏ；ＧａｏＣ...  相似文献   

几种诱导物质对皱纹盘鲍幼虫变态的相互作用     

洪旭光  阚金军  吴宝铃 《海洋科学进展》1996,(4)

本文研究用不同浓度的氯化钾（ＫＣｌ）、γ－氨基丁酸（ＧＡＢＡ）和足粘液相结合对皱纹盘鲍幼虫变态的影响，从中找出皱纹盘鲍幼虫诱导变态的最佳条件，为人工育苗提供科学依据。  相似文献   

氨氮和硫化氢对日本对虾幼体生长和变态发育的影响   总被引：1，自引：0，他引：1       下载免费PDF全文

王仁杰  姜令绪  李建 《海洋科学》2007,31(7):51-54

研究了氨氮和硫化氢对日本对虾(Penaeus japonicus)各期幼体存活率、变态率和日生长率的影响。结果表明,氨氮和硫化氢对日本对虾各期幼体存活率、变态率和日生长率都具有显著性影响(P﹤0.05)。随着氨氮质量浓度的升高,日本对虾各期幼体存活率(无节幼体除外)和未变态个体的日生长率(日生长率A)均逐渐降低,变态率和变态个体的日生长率(日生长率B)则逐渐升高;随着硫化氢质量浓度的升高,日本对虾各期幼体存活率和日生长率A均呈现逐渐降低趋势,变态率和日生长率B也逐渐减小。研究发现,氨氮和硫化氢质量浓度与日生长率A呈现负相关性,变态率与日生长率B呈现正相关性。  相似文献   

方斑东风螺早期发育过程中几种消化酶的活性   总被引：4，自引：0，他引：4  

魏永杰  黄斌  柯才焕  许贻斌  王德祥 《热带海洋学报》2007,26(1):55-59

将方斑东风螺Babylonia areolata(Link)的早期发育从早期面盘幼体到变态后15d的稚贝分成6个阶段,分别测定各阶段蛋白酶(P)、脂肪酶(L)、淀粉酶(A)和纤维素酶(C)活性。研究结果表明,随着幼体发育的推进,蛋白酶比活力逐渐减小,脂肪酶比活力逐渐增加,淀粉酶和纤维素酶比活力则在变态前逐渐增加,而变态后逐渐减小。比较A/P和(A C)/(P L)两种指标指示方斑东风螺幼体发育过程中的食性变化,提出(A C)/(P L)用于指示方斑东风螺食性变化更合理、准确。综合比较幼体发育各阶段4种消化酶活性,发现在面盘幼体向稚贝变态期间,幼体消化能力最弱,原因与幼体的变态过程有关。实验结果也验证了贝类具有分泌纤维素酶的能力,该酶在东风螺对纤维素分解中占主导地位。  相似文献   

儿茶酚胺对魁蚶幼虫变态诱导作用的初步研究     

刘保忠 《海洋科学集刊》1997,(39):81-84

本文研究了L-多巴、多巴胺、肾上腺素、去甲肾上腺素等儿茶酚胺类物质对魁蚶幼虫的变态诱导作用。结果显示:10-4mol/L的L-多巴有较为显著的诱导能力，而各浓度组多巴胺都不能诱导幼虫变态,且高浓度L-多巴和多巴胺对幼虫有毒害效应。10-4-10-6mol/L的肾上腺素和去甲肾上腺素都能表现出诱导作用并且对幼虫无害,为应用于魁蚶的苗种生产提供了可能。  相似文献   

What can flatfish ontogenies tell us about pelagic and benthic lifestyles?     

Lee A. Fuiman 《Journal of Sea Research》1997,37(3-4)

Eye migration, asymmetrical pigmentation, and a 90° rotation in posture are developmental changes that unify all flatfishes and facilitate a transition from a pelagic to a benthic existence. Settlement places the fish in new environmental conditions which may require different types and levels of performance for survival compared to those needed in the water column. Since structure and performance vary as a consequence of ontogeny, it is likely that natural selection has acted on the ontogeny of flatfishes differently from fishes that do not settle (pelagic fishes) to provide different survival skills by the time flatfishes settle. This paper provides examples of quantitative methods for comparing fish ontogenies in the context of three predictions: (1) different flatfish species undergo settlement at a common ontogenetic state; (2) they have a common set of skills at settlement that differ from those of pelagic species of the same ontogenetic state; and (3) skills or features that appear earlier in the ontogenetic program of flatfishes than in pelagic fishes suggest attributes that are important to survival in a benthic habitat. Preliminary comparisons suggest that flatfishes may have accelerated development of their mechanosensory system relative to pelagic species. Firm conclusions about ecologically important differences between the pelagic and benthic habitats derived from analyses of ontogenetic events will require more kinds of data from a broader selection of species.  相似文献   

Floodplain catastrophes in the UK Holocene: messages for managing climate change     

J. Lewin  M. G. Macklin 《水文研究》2010,24(20):2900-2911

Floodplains may be transformed when environmental changes or human activity causes alluvial systems to cross channel pattern thresholds. Thresholds between pattern states based on occurrence fields are only available for some pattern distinctions, and these may not encompass the alluvial contexts and range of dynamic factors involved. Pattern changes now known from the UK Holocene are reviewed as a basis for appreciating the potential for future transformations in a changing environment. These involved episodic boulder and gravel spreads in upland environments, and braiding meandering, anastomosing → meandering and active inactive transformations in more lowland contexts. Concern for possible impacts of climatic change need to be grounded in an appreciation of the nature and scale of these past changes. Some potential future changes may be relatively predictable in location (braiding meandering); others are more difficult given both present knowledge and the varying, modified and inheritance‐rich ‘contexts of vulnerability’ that floodplains now represent. Implications for management are discussed. Copyright © 2010 John Wiley & Sons, Ltd.  相似文献