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官井洋大黄鱼标志放流技术与放流标志鱼早期生态习性性的初步研究 总被引：2，自引：0，他引：2
用人工培育的大黄鱼幼鱼，经丁香酚溶液浸溶麻醉、体背系挂塑料牌，经网箱暂养后于１９８７年１月２０日在官井洋中放流６２１６尾。２个月内回捕４８３尾。通过对回捕鱼及其捕捞实况调查，并结合定置网渔获物中天然大黄鱼及海区温盐断面调查，对放流标志鱼早期的生态习性进行了初步研究。 相似文献
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双斑东方纯标志放流的初步研究 总被引：1，自引：0，他引：1
于2005年12月在福建九龙江口海域标志放流双斑东方纯3192尾，至2006年12月共回收90尾，第一年回捕率为2．82％．主要捕获渔具为流刺网和定置网，其中流刺网捕获83尾，占92．22％，定置网捕获5尾，占5．56％．主要捕获海域为九龙江口的海门岛至鼓浪屿一带，捕获83尾，占92．22％．这表明双斑东方纯放流后并未作远距离洄游，九龙江口海域作为双斑东方纯的索饵场和繁育场，应加强环境保护和海域使用管理． 相似文献
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双斑东方鲀标志放流的初步研究 总被引：1，自引：0，他引：1
于2005年12月在福建九龙江口海域标志放流双斑东方鲀3 192尾,至2006年12月共回收90尾,第一年回捕率为2.82%.主要捕获渔具为流刺网和定置网,其中流刺网捕获83尾,占92.22%,定置网捕获5尾,占5.56%.主要捕获海域为九龙江口的海门岛至鼓浪屿一带,捕获83尾,占92.22%.这表明双斑东方鲀放流后并未作远距离洄游,九龙江口海域作为双斑东方鲀的索饵场和繁育场,应加强环境保护和海域使用管理. 相似文献
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20世纪80年代以来,浙江近海的主要渔业资源呈现衰退趋势,因此从2000年至今相关单位持续开展人工增殖放流以修复渔业资源。文章基于2017—2021年浙江近海鱼类增殖放流统计数据作出分析,对比放流资金、放流数量、放流物种等变化趋势得出：2017—2021年主要在浙江近海12处重要的增殖放流海域投放了大黄鱼（Larimichthys crocea）、黑鲷（Acanthopagrus schlegelii）、黄姑鱼（Nibea albiflora）、条石鲷（Oplegnathus fasciatus）等16种海洋鱼类,累计投入放流资金11 285.9万元,投放海洋鱼类苗种共计46 799.8万尾,其中标志鱼投入共330.1万元,放流苗种48.8万尾。调查和文献报道显示,增殖放流对增加浙江近海海洋鱼类生物资源量、恢复海洋鱼类群落结构、保护海洋生物多样性,促进海洋渔业的发展等方面起到积极的作用。根据调研情况和相关文献梳理了增殖放流存在的问题并提出了相关的改进建议,以期为今后科学规范实施增殖放流提供参考。 相似文献
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大亚湾日本对虾放流技术和增殖效果研究 总被引：1，自引：0，他引：1
１９９２年至１９９４年在大亚湾开展了日本对虾Ｐｅｎａｅｕｓｊａｐｏｎｉｃｕｓ的放流增殖研究,以探讨恢复业已衰退资源的可行性,标志放流体长５３－１０９ｍｍ的日本对虾１１１８８尾,生产性放流体长２０－４１ｍｍ的日本对虾苗６４０万尾,放流增殖效果明显,标志放流的回捕率为２．９１％,生产性放流的回捕率为９．３％,大亚湾内放流的日本对虾,不作季节性远距离洄游,只作季节性短距离的浅水－深水区移动。 相似文献
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一、国内外对虾放流增殖简况当今,国内外除人工养殖对虾外,还采取放流增殖,以增加捕捞产量。这既是水产科技重大成果,也是发展近海捕虾业的必由之路。据文献介绍:日本濑户内海70年代初对虾产量仅466吨,由于每年投放虾苗1～1.5亿尾,回捕率为5～10％,我国从1984年开始就进行大规模的对虾生产性放流对虾,据1986年统计:全国沿海共放流对虾苗(3cm)27亿尾使资源迅速增长。到1975年对虾产量上升1230吨。现仍以每年放流3～5亿尾,回捕增殖对虾5000吨,产 相似文献
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标志放流作为研究海洋生物洄游分布的重要方法之一,早在十六世纪就有将红绸带系结于鲑鱼体上进行放流的记载。今天,以现代科学为基础,在世界范围内广泛开展的海洋资源调查研究事业中,采用标志放流的方法,可以根据放流和重捕的时间、地点来分析、推测该生物的移动方向、路线,范围和速度,并可根据体长、重量和年龄的变化推测其生长率,进 相似文献
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Peter L. Horn 《新西兰海洋与淡水研究杂志》2013,47(3):623-631
In late 1987, bluenose (Hyperoglyphe antarctica) were tagged with streamers attached to fish hooks, at six commercial fishing grounds between Gisborne and Cape Palliser, New Zealand. The tagged hooks were fished on commercial trot lines, but were attached with traces of 5.5 kg breaking strain nylon that broke when the fish took the hook and struggled to escape. Based on catches from full strength control lines fished simultaneously with the detachable gear, 1971 bluenose were tagged. In the subsequent 8.5 years, 44 tagged bluenose (where both the sites of tagging and recapture where known) were recaptured. All but seven of these returns occurred in the first year after tagging, indicating that the rate of long‐term tag retention was not good. Bluenose appeared to be relatively sedentary in the short term, but were capable of quite rapid and extensive movement. Four tagged fish had travelled distances in excess of 450 km, with movements to both the north and south of the tagging area. These data indicate that bluenose off the eastern coast of New Zealand between North Cape and Kaikoura probably comprise a single biological stock. 相似文献
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促肾上腺皮质激素释放激素结合蛋白(CRH-BP)是一种糖基化蛋白,与促肾上腺皮质激素释放激素(CRH)具有很高的亲和力,对CRH诱导的脑垂体促肾上腺皮质激素(ACTH)的释放起到抑制作用。本研究采用RT-PCR与RACE基因克隆方法首次获得太平洋真宽水蚤(Eurytemora pacifica)CRH-BP基因全长cDNA序列(GenBank登录号:MF289345)1950bp,其中ORF区1245bp编码415个氨基酸,5′非编码区841bp,3′非编码区294bp,理论分子量/等电点为45.816/5.87。生物学序列分析结果表明,太平洋真宽水蚤CRH-BP氨基酸序列与桡足类中近亲真宽水蚤同源性最高;具有6个蛋白修饰位点及蛋白家族标签序列,具有明显的跨膜结构域及信号肽。实时荧光定量PCR分析结果表明,太平洋真宽水蚤CRH-BP基因在盐度、温度及pH环境胁迫中的mRNA表达量均具有一定的时间梯度表达性与浓度梯度表达性特征。本文通过对太平洋真宽水蚤CRH-BP基因结构及不同环境因子刺激下的表达特点的研究为探究桡足类在环境应激、生殖生理及免疫调控等方面奠定了理论基础。 相似文献
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MH Dames PD Cowley A-R Childs RH Bennett EB Thorstad TF Næsje 《African Journal of Marine Science》2017,39(1):111-120
Understanding the level of connectivity between estuarine and coastal waters is essential for appropriate management of estuarine-associated taxa. Most studies have focused on the role of a single estuary, while limited research exists on the importance of multiple estuaries to individuals of estuarine-associated species. This study used acoustic telemetry to assess the usage of multiple estuaries and coastal waters by the estuarine-dependent spotted grunter Pomadasys commersonnii. Twenty-six adult fish were tagged with acoustic transmitters in the Kariega and Bushmans estuaries, South Africa, and their movements along a 300-km stretch of Indian Ocean coastline were monitored for up to 17 months. Tagged individuals spent most of their time in the estuary where they were tagged (55% and 85% for fish tagged in the two estuaries, respectively), followed by time in the sea (30% and 15%) and in other estuaries (15% and <1%). The mean durations of sea trips for fish tagged in the Kariega Estuary or Bushmans Estuary, respectively, were 25 days (range 3–55) and 12 days (range 2–22). Of the fish that went to sea, 93% from the Kariega Estuary and 60% from the Bushmans Estuary visited other estuaries. Most visits were undertaken to the Swartkops, Bushmans and Kowie estuaries, although the longest durations were spent in the Sundays Estuary. Individuals moved to estuaries up to 130 km away. The total distance travelled between estuaries by an individual during the study was ～529 km, with means of 201 and 184 km, respectively, for fish tagged in the Kariega and Bushmans estuaries. Despite covering large distances between estuaries, individuals often returned to their tagging estuary. Residency in their tagging estuary, combined with frequent visits to a neighbouring estuary, highlights the importance of estuarine habitats for this popular fish species, even after reaching maturity. 相似文献
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栉孔扇贝血淋巴中超氧化物歧化酶和过氧化氨酶活性及其性质的研究 总被引：2，自引：0，他引：2
于１９９７年１０月－１９９８年１月,从胶州湾贝类养殖场购买栉孔扇贝,分别采用邻苯三酚自氧化法和过氧化氢法测定了其血细胞和血清中的超氧化物歧化酶（ＳＯＤ）和过氧化氢酶（ＣＡＴ）的活力,并对ＳＯＤ类型的鉴别区分、ＳＯＤ和ＣＡＴ的热稳定性以及温度对ＳＯＤ和ＣＡＴ活力的影响进行研究。结果表明,血细胞中ＳＯＤ和 ＣＡＴ活力分别为３１２．７Ｕ和 １２４．４Ｕ,血清中ＳＯＤ和ＣＡＴ活力分别为１０２．３Ｕ和７３．８Ｕ;冻存１０ｄ后,血清中ＳＯＤ的活力丧失２４．６％,而ＣＡＴ的活力丧失４０．８％;血细胞中ＣｕＺｎ－ＳＯＤ和Ｍｎ－ＳＯＤ的活力分别为１９３．４Ｕ和８２．３Ｕ,血清中仅存在ＣｕＺｎ－ＳＯＤ活性;血清中ＳＯＤ的热稳定性很高,在８０℃下保温３０ｍｉｎ后,酶活力仍很高,而ＣＡＴ的热稳定性较低;血清中的ＳＯＤ和ＣＡＴ的最适温度分别为５０℃和４５℃。 相似文献
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There exists obvious difference in recapture rate of tagged shrimp in various sea areas and years in autumn season, but the majority of them (98%) are recaptured in the releasing year. Although the main portion of each shrimp group in the Bohai Sea has separate distribution area, they intermingle in autumn season to search for food, thus forming a principal fishing ground located in the central Bohai Sea.Those shrimps wintering in south-central portion of the Huanghai Sea are generally divided into two populations. One is called the Korean population, inhabiting along the western coast of Koera, which is less in abundance and smaller in shrimp size; and the other is called the Chinese population, inhibiting along the Bohai Sea coast and the Huanghai Sea coast of China, which is richer in abundance and larger in shrimp size. The spawning grounds of the latter extend throughout the Bohai Sea and off the Huanghai Sea coast of China, from the Yalujiang Estuary area in the north to the coastal waters of Haiz 相似文献
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铜锌超氧化物歧化酶(Superoxide dismutase,SOD)是一种广泛存在于生物体中最主要的抗氧化酶之一,在抵御过多活性氧簇对机体毒害的过程中起重要作用。本研究以太洋真宽水蚤为研究对象,采用RT-PCR与RACE方法克隆得到太平洋真宽水蚤Cu/Zn SOD基因全长c DNA序列。Cu/Zn SOD(Gen Bank登录号:MF289343)基因序列全长837bp,其中完全开放阅读框为456bp编码152个氨基酸,5′非编码区长297bp,3′非编码区长84bp,分子量约为15.050k Da,理论等电点为5.73。序列比较表明,太平洋真宽水蚤Cu/Zn SOD c DNA的氨基酸序列与其他甲壳动物的一致性较高;存在8个蛋白翻译后修饰位点及蛋白家族标签序列,无跨膜结构域与信号肽。在重金属铬与镍胁迫下,通过实时荧光定量PCR对太平洋真宽水蚤Cu/Zn SOD m RNA体内表达特点分析显示,其表达量均呈现先升后降趋势,在暴露12小时后表达量达到峰值;铬胁迫下的表达量略高于镍;联合胁迫下呈现出拮抗作用。本研究结果将有利于深入探讨桡足类Cu/Zn SOD基因的结构与功能,为进一步研究抗氧化分子机理奠定基础。 相似文献
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《African Journal of Marine Science》2013,35(2):229-238
Knowledge of population distribution and movement is crucial for the conservation and management of shark species occurring in coastal waters. From 1984 to 2009, 641 scalloped hammerheads Sphyrna lewini, 1 342 smooth hammerheads Sphyrna zygaena and 1 352 unspecified hammerheads Sphyrna spp. were tagged and released along the east coast of South Africa, with recapture rates of 1.9%, 1.5%, and 0.7% respectively. Maximum and average distance moved was 629 km and 147.8 km (95% CI = 33.0–262.7 km) for S. lewini and 384 km and 141.8 km (95% CI = 99.1–184.5 km) for S. Zygaena respectively. The majority of sharks (68% S. lewini, 74.1% S. zygaena and 33.5% Spyrna spp.) were tagged in the Transkei region, with the largest number tagged in Port St Johns. Across regions, most tagged sharks were >50–100 cm precaudal length (PCL), except in Transkei where more sharks >100–150 cm PCL were tagged. In the Western Cape, Southern Cape and Eastern Cape, few sharks were tagged during the autumn/winter months, whereas in KwaZulu-Natal and Transkei sharks were tagged throughout the year. Large-scale directional movements observed may have been migrations in response to seasonal sea surface temperature changes. We identify coastal locations in Transkei that are of importance to juvenile and subadult hammerhead populations year-round. 相似文献