971 resultados para Black Canadians -- Ontario -- History


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The black scabbardfish is a deep water species that supports commercial fisheries across a large area of the NE Atlantic shelf. The life history of black scabbardfish is poorly understood and a major unresolved issue is population structure. In this study it was used a combination of methodologies to get further knowledge in the life history and population structure of A. carbo over its wide distribution range in the Northeast Atlantic. The new knowledge acquired during this study, will increase our ability to better manage this species in the NE Atlantic. It has been postulated that fish caught to the west of the British Isles are pre-adults that migrate further south (to Madeira) for spawning, implying a single panmictic population. In this study, specimens of Aphanopus carbo were sampled between September 2008 and May 2010 from two different areas: NW Scotland (French trawlers and deep water surveys) and Madeira Islands (longliners commercial landings). Geographical differences in reproductive state of scabbardfish were evident, supportive of a north-south migration theory. In the northern area, all specimens found were immature, while in Madeira all maturity stages were observed. In Madeira, spawning occurred during the fourth quarter, with peak maturity in October (males) and in November (females). The age of this species has proven difficult and has led to different and contradictory age and growth estimates. For this study, we used two reading interpretations to determine age and estimate the growth parameters. To the west of the British Isles, specimens reached a lower maximum age and had a higher growth rate than those caught off Madeira. These differences are consistent with the theory of a single population of black scabbardfish in the NE Atlantic, highly segregate, with smaller, immature and younger fish caught to the west of the British Isles and bigger and mature caught in Madeira Islands. The feeding ecology showed strong evidence that the diet of black scabbardfish is associated with the spawning migration of blue whiting, which may support a northerly feeding migration theory for black scabbardfish. The stable isotope analyses in the muscle of black scabbardfish identified that black scabbardfish feeds on species with epipelagic and benthopelagic affinities. Comparison with stable isotope analysis in Madeira samples indicated that black scabbardfish feed at a similar trophic level and has the same trophic niche width in both areas, assuming similar baseline isotope compositions. Otolith stable isotopes (oxygen - δ18O and nitrogen - δ15N) analyses were used as a tool to clarify migratory behaviour. Otolith isotope ratios can provide insight into whether adults caught around Madeira fed in an isotopically depleted northerly ecosystem (NW Scotland) during their pre-adult period and then migrate towards south to spawn. Overall, the results support a south-north migration of pre adult fish from spawning areas around Madeira and a north-south migration from the west of Scotland to the spawning areas. Given its life cycle there is an urgent need that the management process recognizes the existence of a continuous widely distributed stock of black scabbardfish between the west of the British Isles and Madeira. The results highlight large scale dispersal in this species which needs to be treated as a highly migratory species and be managed as a single population.

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Tese de doutoramento, Ciências do Mar, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2015

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This investigation comprises three parts: (1) the source, mechanism of transport, and distribution of pollen, spores and other palynomorphs in Georgian Bay bottom sediments and a comparison of these data with the contemporary vegetation, (2) the relative significance of fluvial transportation of pollen and spores, and (3) the late- and postglacial history of vegetational and climatic changes in the Georgicin Bay region. Modem pollen and spore assemblages in Georgian Bay do reflect the surrovinding vegetation when preservation and pollen production by the different species are considered and accounted for. Relative pollen percentage and concentration isopoll patterns indicate that rivers contribute large quantities of pollen and spores to Georgian Bay. This is further substantiated by large amounts of pollen and spores which were caught in traps in the Moon, Muskoka, and Nottawasaga Rivers which flow into Georgian Bay. The majority of pollen and spores caught in these traps were washed into the rivers by surface water runoff and so reflect the vegetation of the watershed in a regional sense. In a 12.9 metre long sediment core from northeastern Georgian Bay the relative percentage and absolute pollen concentrations allow correlation of Georgian Bay Lake phases with climatic and forest history. Four distinct pollen zones are distinguished: zone GB IV which is the oldest, reflects the succession from open spruce woodland to boreal forest; zone GB III represents a period of pine-mixed hardwoods forests from about 10,000 to 7,500 years ago. A pine-maplehemlock association dominated in zone GB II, although during the culmination of postglacial warming about 4,000 to 5,000 years ago the Georgian Bay forests had a more deciduous character. Zone GB I clearly shows European man's disturbance of the forest by logging activities.

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Geochemical examination of the rock matrix and cements from core material extracted from four oil wells within southwestern Ontario suggest various stages of diagenetic alteration and preservation of the Trenton Group carbonates. The geochemical compositions of Middle Ordovician (LMC) brachiopods reflect the physicochemical water conditions of the ambient depositional environment. The sediments appear to have been altered in the presence of mixed waters during burial in a relatively open diagenetic microenvironment. Conodont CAl determination suggests that the maturation levels of the Trenton Group carbonates are low and proceeded at temperatures of about 30 - 50°C within the shallow burial environment. The Trenton Group carbonates are characterized by two distinct stages of dolomitization which proceeded at elevated temperatures. Preexisting fracture patterns, and block faulting controlled the initial dolomitization of the precursor carbonate matrix. Dolomitization progressed In the presence of warm fluids (60 75°C) with physicochemical conditions characteristic of a progressively depleted basinal water. The matrix is mostly Idiotopic-S and Idiotopic-E dolomite, with Xenotopic-A dolomite dominating the matrix where fractures occur. The second stage of dolomitization involved hydrothermal basinal fluid(s) with temperatures of about 60 - 70°C. These are the postulated source for the saddle dolomite and blocky calcite cements occurring in pore space and fractures. Rock porosity was partly occluded by Idiotopic-E type dolomite. Late stage saddle dolomite, calcite, anhydrite, pyrite, marcasite and minor sphalerite and celestite cements effectively fill any remaining porosity within specific horizons. Based on cathode luminescence, precipitation of the different diagenetic phases probably proceeded in open diagenetic systems from chemically homogeneous fluids. Ultraviolet fluorescence of 11 the matrix and cements demonstrated that hydrocarbons were present during the earliest formation of saddle dolomite. Oxygen isotope values of -7.6 to -8.5 %0 (PDB), and carbon isotope values of - 0.5 and -3.0 %0 (PDB) from the latest stage dog-tooth calcite cement suggest that meteoric water was introduced into the system during their formation. This is estimated to have occurred at temperatures of about 25 - 40°C. Specific facies associations within the Trenton Group carbonates exhibit good hydrocarbon generating potential based on organic carbon preservation (1-3.5%). Thermal maturation and Lopatin burial-history evaluations suggest that hydrocarbons were generated within the Trenton Group carbonates some time after 300 Ma . Progressively depleted vanadium trends measured from hydrocarbon samples within southwestern Ontario suggests its potential use as a hydrocarbon migration indicator on local (within an oilfield) and on regional scales.

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This study has three purposes: to establish a chronologically controlled vegetational history for a number of sites in south Southwestern Ontario; to utilize the resulting data to support and/or add to the current understanding of Quaternary geology and stratigraphy, and the glacial and postglacial history of the Great Lakes in south Southwestern Ontario; and to attempt to propose a possible explanation for the extinction of the mastodon in Southern Ontario. Palynological and geochronological analyses were conducted on material collected from eleven sites (east to west): Verbeke Mastodon Site, Woloshko Mastodon Site, Walker Pond II, Pond Mills I, Lake Hunger Bog, Bouckaert Site. Mabee Site, Cornell Bog. Colles Lake I, Folden Mastodon Site and Forest Pond. Individual geochronologically controlled (where possible) vegetational histories were reconstructed for each of the sites investigated. The results of the individual studies, when considered in overview. indicated the existance of an established closed boreal forest throughout south Southwestern Ontario by 10,000 years B.P. This evidence for a significant climatic change coincident throughout south Southwestern Ontario supports the proposed age of 10,000 years B.P. for the Pleistocene/Holocene Boundary (Terasmae, 1972). Remnant patches of 'open spruce parkland' persisted in small local 'wet' areas. It was in these areas that the mastodon was restricted during early Holocene time. With continued encroachment by the surrounding boreal forest, possibly speeded up by this browser's destructive feeding habits, the spruce enclaves shrank and the mastodon became extinct in south Southwestern Ontario. The results of this thesis basically support Dreimanis' (1967, 1968) proposed 'Environmental-Climatic' theory for mastodon extinction. It is suggested that increased dryness during the present interglacial compared to the climate of earlier interglacials may be the key to unravelling the problem of mastodon extinction in eastern North America.

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This is a quarterly tithing ticket from the British Methodist Episcopal Church, signed by R. Miller, Minister, and dated November 28, 1875. It was in the possession of the Rick Bell Family of St. Catharines, Ontario. Relatives of the Bell family include former Black slaves from the United States who settled in Canada.

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A quarterly tithing ticket from the British Methodist Episcopal Church, signed by Walter Hawkins, Minister, issued on August 16, 1874. This ticket was in the possession of the Richard Bell Family of St. Catharines.Minister Walter Hawkins was Superintendent of the Conference for the British Methodist Episcopal Church (Brant Co.) This excerpt from the Dictionary of Canadian Biography Online describes his role in reestablishing the BMEC in Canada following a period of reunion with the African Methodist Episcopal Church, an initiative spearheaded by Richard Randolph Disney, a free-born black American Methodist preacher. "By the end of the 1870s the BMEC had 56 congregations with about 3,100 members, the bulk of the latter being in the Danish West Indies and British Guiana. Because mission work outside Canada had overtaxed the church's financial resources, in 1880 Disney began negotiations towards reunion with the AMEC. The reunion was effected that year, and it was overwhelmingly ratified at a BMEC convention held at Hamilton in June 1881. A referendum showed that although a majority in Ontario was opposed, 86 per cent of the membership was in favour. Disney was accepted as an AMEC bishop and was assigned to its Tenth Episcopal District, a region embracing his former territory as well as some of the AMEC churches in Canada which had not joined the BMEC. Reunification appeared to have been a triumph for Disney, but trouble soon occurred. A majority of the Ontario churches and preachers, led by the Reverend Walter Hawkins of Chatham, sought to re-establish the BMEC, fearing the loss of their distinctive identity and perhaps feeling that the Caribbean groups had exercised too much influence on the reunification question. In 1886 this group held an ecclesiastical council at Chatham, at which it was claimed that Disney had defected to the AMEC. At a subsequent general conference that year the BMEC was reconstituted. The conference deposed Disney, agreeing to "erase his name and ignore his authority, and cancel his official relationship as bishop." The conference minutes also refer to a court case instigated by Disney which reached the High Court of Chancery in Britain, but records of this case have not been located. The reconstituted BMEC elected Hawkins as its general superintendent, avoiding the title of bishop for several years." Source: Dictionary of Canadian Biography Online. Government of Canada.

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A first quarterly tithing ticket from the British Methodist Episcopal Church, signed by W. Grayson, Minister, and dated August 1, 1879. This ticket was in the possession of the Rick Bell Family of St. Catharines, Ontario. Relatives of the Bell family include former Black slaves from the United States who settled in Canada.

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A third quarterly tithing ticket from the British Methodist Episcopal Church, signed by the Minister, and dated February 17, 1884. This ticket was in the possession of the Rick Bell family of St. Catharines, Ontario. Relatives of the Bell family include former Black slaves from the United States who settled in Canada.

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A second quarterly tithing ticket from the British Methodist Episcopal Church, signed by Rev. P. Brooks, Minister, issued on November 24, 1889. This ticket was in the possession of the Richard Bell family of St. Catharines, Ontario. The Bell family ancestry includes former Black American slaves who settled in Canada.

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A St. Catharines Public Schools Honor Pupils certificate presented to Bessie Bell, dated December 8, 1910 and signed by G. E. Lounsbury, Teacher. This certificate was in the possession of the Richard Bell Family of St. Catharines, Ontario.The certificate reads: "Bessie Bell is this day entitled to receive this public expression of approbation for Industry, Good Conduct and Regular Attendance, for the week ending December 8th 1910. Parents are particularly requested to enquire for a card of this kind at the close of each week."

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The Family Record page from the Bell Family Bible providing information on the births of Bell ancestors. Relatives of the Bell family include former American slaves who later settled in Canada. This Bible was in the possession of the Rick Bell Family of St. Catharines, Ontario.