Pollock (Pollachius virens) stock structure in the Canadian Maritimes inferred from mark-recapture studies     

Neilson  John D.; Stobo  Wayne T.; Perley  Peter 《ICES Journal of Marine Science》2006,63(4):749-765

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On the radiated noise of the autosub autonomous underwater vehicle   总被引：1，自引：2，他引：1  

Griffiths  Gwyn; Enoch  Peter; Millard  Nicholas W. 《ICES Journal of Marine Science》2001,58(6):1195-1200

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A Nonlinear Model of Surf Beat     

Nicholas Dodd 《中国海洋工程》1995,(2)

A nonlinear short-wave-averaged (surf beat) model is presented. The model is based on that of Roelvink (1993), but the numerical techniques used in the solution are based on the so-called weighted-averaged flux (WAF) method (eg Watson et al., 1992), with time-operator splitting used for the treatment of some of the source terms. This method allows a small number of computational points to be used, and is particularly efficient in modelling breaking long waves. The short-wave (or primary-wave) energy equation is solved using a more traditional Lax-Wendroff technique. Results of validation indicate that the model performs satisfactorily in most respects.  相似文献   

The contribution of atmospheric acid deposition to ocean acidification in the subtropical North Atlantic Ocean     

Nicholas R. Bates  Andrew J. Peters   《Marine Chemistry》2007,107(4):547-558

The absorption of anthropogenic CO₂ and atmospheric deposition of acidity can both contribute to the acidification of the global ocean. Rainfall pH measurements and chemical compositions monitored on the island of Bermuda since 1980, and a long-term seawater CO₂ time-series (1983–2005) in the subtropical North Atlantic Ocean near Bermuda were used to evaluate the influence of acidic deposition on the acidification of oligotrophic waters of the North Atlantic Ocean and coastal waters of the coral reef ecosystem of Bermuda. Since the early 1980's, the average annual wet deposition of acidity at Bermuda was 15 ± 14 mmol m^− 2 year^− 1, while surface seawater pH decreased by 0.0017 ± 0.0001 pH units each year. The gradual acidification of subtropical gyre waters was primarily due to uptake of anthropogenic CO₂. We estimate that direct atmospheric acid deposition contributed 2% to the acidification of surface waters in the subtropical North Atlantic Ocean, although this value likely represents an upper limit. Acidifying deposition had negligible influence on seawater CO₂ chemistry of the Bermuda coral reef, with no evident impact on hard coral calcification.  相似文献   

Importance of spawning location and timing to successful transport to nursery areas: a simulation study of Gulf of Alaska walleye pollock   总被引：2，自引：0，他引：2  

Hinckley  Sarah; Hermann  Albert J.; Mier  Kathy L.; Megrey  Bernard A. 《ICES Journal of Marine Science》2001,58(5):1042-1052

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The pre-glacial pleistocene of the Norfolk and Suffolk coasts: R.G. West. Cambridge University Press, London/New York, 1980, 203 pp., 36 plates, 54 figures, 49 tables, £40.00     

Nicholas Stephens 《Marine Geology》1981,40(3-4):271-273

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Vertical migration and mortality of benthos in dredged material: Part III—polychaeta     

Don Maurer  Richard T Keck  Jeff C Tinsman  Wayne A Leathem 《Marine environmental research》1982,6(1):49-68

The survival of benthic invertebrates from dredging and disposal activities is a major environmental concern in such projects. The purpose of the research described in this paper was to determine the ability of benthos (polychaetes, Scoloplos fragilis and Nereis succinea) to migrate vertically in natural and exotic sediments and to determine the survival of benthos when exposed to particular amounts of simulated dredged material.Mortalities generally increased with increased sediment depth, exotic sediment and burial time. Temperature also affected vertical migration and mortalities. These experiments, together with other experiments conducted by us and other workers, indicate that polychaetes in particular, and benthos in general, can survive dredging and disposal projects. Under certain conditions several major taxa (polychaetes, molluscs, crustaceans) can be expected to successfully recolonise disposal sites by vertical migration.  相似文献   

Comparison of cytochrome P450 in three butterflyfish species: Ecological implications of elevated CYP2B and CYP3A in Chaetodon capistratus     

Nicholas H. Vrolijk  Nancy M. Targett  Bruce R. Woodin  John J. Stegeman 《Marine environmental research》1995,39(1-4)

The relationship between cytochrome P450 and feeding on terpenoid-rich gorgonian corals was investigated in a species of tropical butterflyfish and compared with two other sympatric congeners that do not feed on gorgonians. Fish were collected from non-polluted waters in Belize and the levels of two cytochrome P450 isozymes (CYP2B and CYP3A) were immunoquantitated in addition to quantification of total P450. Chaetodon capistratus regularly feeds on gorgonian corals and has higher levels of total hepatic microsomal cytochrome P450 than C. ocellatus or C. striatus. The content of hepatic P450 (0.588–0.794 nmol mg⁻¹) in C. capistratus is among the highest ever reported in teleosts from non-polluted waters and is significantly greater than detected in C. ocellatus or C. striatus. Chaetodon capistratus also had a larger hepatic index (g liver per g fish) and more microsomal protein (mg protein per g liver), factors that translate into 3.3- to 8-fold more total P450 per g fish. Sexual differences in total P450 were observed between male and female C. capistratus, but not among the other species. The contents of proteins detected by immunoassay with polyclonal anti-scup P450B (CYP2B) and anti-human P4503A (CYP3A) were 2- to 10-fold and 2- to 20-fold greater, respectively, in C. capistratus than in the congeneric species. CYP2 and CYP3 gene families in mammals are thought to have evolved partially in response to dietary allelochemicals. These results suggest that these P450 isozymes may also be important in marine teleosts that feed on terpenoid-rich prey.  相似文献   

Population structure of Haliotis rubra from South Australia inferred from nuclear and mtDNA analyses   总被引：1，自引：0，他引：1  

LI Zhongbao  Sharon A Appleyar  Nicholas G Elliott 《海洋学报(英文版)》2006,25(4):99-112

1Introduction ThemajorityofAustralia’sabalonefisheryex ports(5.135kt,worth＄216millionin2002～2003,ABARE2004)consistofblacklipabalone(HaliotisrubraLeach,1814).AssuchH.rubrais consideredasanimportantmarineresourcewithin Australia.Likemanyabalonespecieswor…  相似文献   

Accuracy and precision of fish-count data from a "dual-frequency identification sonar" (DIDSON) imaging system     

Holmes  John A.; Cronkite  George M.W.; Enzenhofer  Hermann J.; Mulligan  Timothy J. 《ICES Journal of Marine Science》2006,63(3):543-555

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