A possible connection between hydrography and the distribution of Calanus finmarchicus on the Norwegian midshelf in 1997     

Pedersen  O-P.; Tande  K. S.; Timonin  A.; Semenova  T. 《ICES Journal of Marine Science》2000,57(6):1645-1655

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影响萼花臂尾轮虫种群增长的生态学因子的研究：温度和饵料密度的影响   总被引：11，自引：0，他引：11  

王金秋 《海洋湖沼通报》1995,(4):21-27

本文研究了在5个温度梯度和4个饵料密度的20个试验组合下，萼化臂尾轮虫（Brachionuscalyciflorus）的种群增长规律。结果表明，该轮虫实验种群的最适温度范围是28—32℃，临界高温是36－40℃；最适饵料密度是45－65×106个／ml。这两个生态因子的最佳组合是温度32℃，饵料密度为65×106个／ml，此时，种群达最大密度3．4×103个／ml。  相似文献   

The occurrence of lice on sea trout (Salmo trutta L.) captured in the sea off the East Anglian coast of England     

Tingley  G. A.; Ives  M. J.; Russell  I. C. 《ICES Journal of Marine Science》1997,54(6):1120-1128

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Eastern and Western Poor Cod (Trisopterus minutus capelanus) Populations in the Mediterranean Sea: Evidence from Allozyme and Minisatellite Loci     

Valeria Mattiangeli  Anthony W. Ryan  Paul Galvin  Jarle Mork  & Thomas F. Cross 《Marine Ecology》2003,24(4):247-258

Abstract. Nine allozyme and two minisatellite loci were used to investigate potential genetic differentiation among three samples of Mediterranean poor cod, Trisopterus minutus capelanus, from the Gulf of Lion, the Tuscan Archipelago and the Aegean Sea. Both types of markers showed consistent results, with F_ST values of 0.0262 and 0.0296 (P < 0.0015, after Bonferroni correction for multiple tests) for allozymes and minisatellites, respectively. Allele frequency heterogeneity tests between pairs of samples showed a clear separation between the two western Mediterranean samples (Gulf of Lion, Tuscan Archipelago) and the eastern one (Aegean Sea). The results indicate that at least two reproductively isolated populations of poor cod occur in the Mediterranean.  相似文献   

When will the eel recover? A full life-cycle model     

Astrom  Marten; Dekker  Willem 《ICES Journal of Marine Science》2007,64(7):1491-1498

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端元分析模型在长江口邻近海域沉积物粒度数据反演方面的应用   总被引：1，自引：1，他引：1  

张晓东  翟世奎  许淑梅 《海洋学报》2006,28(4):159-166

海洋沉积物粒度分布曲线往往同时具有多个峰,而且同一类型沉积物因时间和空间上的不同其粒度分布曲线峰的位置也不同,沉积物粒度分布多峰的特点反映了沉积物不同的输运形式和沉降过程[1,2].因此,在沉积物的粒度分布数据中保存了有关沉积物输运和沉降的信息,而获得这些信息对于揭示沉积区域水动力特性、沉积物输运和沉降规律具有重要的意义.  相似文献   

Multiple stock structure of Atlantic cod (Gadus morhua) off Newfoundland and Labrador determined from genetic variation   总被引：1，自引：0，他引：1  

Beacham  Terry D.; Brattey  John; Miller  Kristina M.; Le  Khai D.; Withler  Ruth E. 《ICES Journal of Marine Science》2002,59(4):650-665

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Molecular identification of bloom-forming species Phaeocystis globosa(Prymnesiophyta)and its dispersal based on rDNA ITS sequence analysis   总被引：3，自引：1，他引：3  

Chen Yueqin  Shao Peng  Wang Ning  Zhou Hui  Qu Lianghu  Linda K. Medlin 《海洋学报(英文版)》2003,22(2)

Abstract-The colony-forming Phaeocystis species are causative agents of dense bloom occurrences incoastal waters worldwide. It is difficult to separate them because of the different morphologies associatedwith their colonial stages. In this study we applied molecular approaches to analyze the genetic variationof Phaeocystis globosa and Phaeocystis pouchetii from several geogrtaphic regions, and to assist in tracingthe dispersal of bloom-forming Phaeocystis species in coastal waters of China. The Sequences of the inter-nal transcribed sacers (ITS1 and ITS2) of rDNA and the 5.8S ribosomal RNA gene of Phaeocystisstrains were determined. Sequence comparison shows that P.globosa was the most divergent toP. pouchetii, exhibiting sequence divergence higher than 0.08. However, lower genetic divergences ex-isted between strains of P.globosa. The sequence comparison of the Phaeocystis rDNA ITS clearlyshows that the species isolated from the southeast coast of China is identified as P. globosa rather thanP. cf. po  相似文献   

Natural expansion and experimental manipulation of seagrass (Zostera spp.) abundance and the response of infaunal invertebrates     

Paul G. Harrison 《Estuarine, Coastal and Shelf Science》1987,24(6)

A study of an expanding seagrass bed on the south-west coast of British Columbia, Canada involved documentation and explanation of the pattern of expansion of the vegetation as well as documentation and experimental investigation of the accompanying changes in the distribution of infaunal invertebrates. Expansion followed a major environmental change, improved water clarity initiated in 1969 when a causeway blocked access to the site for silty Fraser River water. The original eelgrass (Zostera marina) bed expanded landward over 30 m year⁻¹, probably causing more and more water to be retained in the bed at low tide and thus improving its own habitat. More rapid expansion occurred from 1979–1983 after Z.japonica colonized at the landward edge of the eelgrass bed and in a separate intertidal area. Expansion ceased around 1983 coincident with, but probably independent of, further construction.Burrowing shrimp (Callianassa californiensis) decreased in abundance between 1977 and 1984 in areas where the two seagrasses colonized. Short-term experiment over one summer and fall showed that removal of all shoots allowed adult shrimp and tube worms to colonize the sediment while addition of shoots of Z. japonica by transplanting caused temporary decreases in shrimp abundance. After a few weeks an established shrimp population destroyed the transplants. Among reasonable alternate hypotheses for the decline in Callianassa, the effect of sediment texture can be eliminated, but either direct negative effects of seagrass, i.e. inhibition of the burrowing of adult shrimp or of settlement of juveniles, or indirect effects, i.e. the harboring of more predators of shrimp in seagrass beds, deserve further study.  相似文献   

The Effect of Human Exclusion on the Population Structure of Key-Hole Limpets Fissurella crassa and F. limbata on the Coast of Central Chile     

Doris  Oliva Juan Carlos  Castilla 《Marine Ecology》1986,7(3):201-217

Abstract. We describe the basic ecology of two key-hole limpets, Fissurella crassa and Fissurella limbata , which are heavily harvested by coastal shellfishermen (mariscadores) at the rocky intertidal of central Chile. The ecological role of human predation on these species was assessed. Anthropic exclusion from a stretch of the rocky intertidal at Las Cruces (non-harvested area) for about two and a half years resulted in changes of the densities and size distributions of these fissurelid species as compared to populations in control zones (harvested area). Differential human predation generates, on key-hole limpets, responses of different intensities related to the accessibility of man to the mesohabitats (sheltered platforms, exposed platforms and vertical walls) and fringes of the intertidal (mid-low intertidal and Lessonia nigrescens fringe). Thus, size distributions and mean densities of both fissurelids differ widely between the harvested and non-harvested areas on both platform habitats but not on vertical walls. In the mid-low intertidal fringe, differences are greater than in the less accessible L. nigrescens intertidal fringe. Moreover, we discuss the way in which other species, directly harvested by mariscadores (i. e., the mollusc Concholepas concholepas) can affect the keyhole limpet populations of central Chile rocky shores. Finally, we highlight the ecological role of these limpets on the dynamics of intertidal ecosystems and how they can modify community landscape.  相似文献