14,101 research outputs found
L. G. Mackenzie
No full text"VX100358 Cpl LG Mackenzie Arrived Darwin 7.8.1941 Departed Adelaide River 13.4.1943 7 Aust Fld Survey Sec AIF".VX100358 Corporal L. G. Mackenzie. Arrived Darwin 7.8.1941. Departed Adelaide River 13.4.1943. 7 Australian Field Survey Section, Australian Imperial Forces
Author Peter FitzSimons speaking at the National Library of Australia, Canberra, 13 November 2012 /
No full textTitle from acquisitions documentation.; Part of the collection: Portraits of author Peter FitzSimons speaking at the National Library of Australia, Canberra, 13 November 2012.; Acquired in digital format; access copy available online.; Mode of access: Online.; Photographed by a staff member of the National Library of Australia
Portrait of Evelyn Beatrice Mackenzie (youngest daughter of John Mackenzie of Melbourne, Australia) & her St. Bernard dog, Roy [picture] /
No full textTitle from inscription on reverse.; Condition: Fair.; Inscriptions: "Evelyn Beatrice Mackenzie (youngest daughter of John Mackenzie of Melbourne, Australia) & her St. Bernard dog, Roy, no. 6" --In ink on reverse. "Massingham, Geelong" --Printed beneath photograph.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.pic-an24283325
Professor Peter Singer speaking at the National Press Club Canberra, 11 February 2009 [picture] /
No full textTitle devised by cataloguer based on information from acquisitions documentation.; Part of the collection: Humanitarian author Professor Peter Singer at the National Press Club, Canberra, 11 February 2009.; Acquired in digital format; access copy available online.; Mode of access: Internet via World Wide Web.; Photographed by a staff member of the National Library of Australia, 2009
DSpace for e-print archives
No full textDSpaceTM (http://dspace.org/) is the new open source digital repository system from the MIT Libraries and Hewlett-Packard Labs designed to support the digital collections of academic research institutions, as well as the SPARC conception of Institutional Repositories for digital research material. The DSpace system has been described elsewhere in detail so the focus of this article is on its implementation at MIT for archiving e-prints and other artifacts of scholarly communication, and making these available to the public. The MIT Libraries are deeply concerned about the well-documented crisis in scholarly communication and are committed to working
towards innovative solutions. We share this concern with many of the MIT faculty and administration, several of who have been key supporters of the DSpace project and related
initiatives at the university. The MIT Libraries were a founding member of SPARC, and are a signatory of the Budapest Open Access Initiative (BOAI). This article will describe how MIT Libraries have implemented DSpace to support these goals
Myxidium finnmarchicum Mackenzie, Collins, Kalavati & Hemmingsen, 2010, n. sp.
No full textMyxidium finnmarchicum n. sp. (Figs. 1–4)Published as part of Mackenzie, Ken, Collins, Catherine, Kalavati, Chaganti & Hemmingsen, Willy, 2010, Myxidium finnmarchicum n. sp. (Myxosporea: Myxidiidae) from the gall bladder of whiting Merlangius merlangus (L.) (Pisces: Teleostei) in North Norway, pp. 56-64 in Zootaxa 2673 on page 58, DOI: 10.5281/zenodo.19917
Pseudalataspora lophii Afonso-Dias, Kalavati, Mackenzie & Mackenzie, 2007, n. sp.
No full textPseudalataspora lophii n. sp. (Figures 10–15) Material studied Host: Lophius piscatorius L. Site of infection: gall bladder Locality, date and depth: (1) 58 ° 51 ˏN, 07° 35 ˏW (NW of Outer Hebrides), 30 March, 2000, 250m; (2) 58 ° 45 ˏN, 07° 49 ˏW (NW of Outer Hebrides), 30 March, 2000, 400m; (3) 58 ° 29 ˏN, 08° 54 ˏW (NW of Outer Hebrides), 30 March, 2000, 470m; (4) 58 ° 45 ˏN, 08°03ˏW (NW of Outer Hebrides), 30 March, 2000, 700m; (5) 57 ° 20 ˏN, 05° 50 ˏW (Off Skye, Inner Hebrides), March 2004, depth unknown; (6) 57 ° 20 ˏN, 05° 50 ˏW (Off Skye, Inner Hebrides), August, 2004, depth unknown. Prevalence: (1) 3 of 16 (19 %); (2) 14 of 26 (54 %); (3) 1 of 1; (4) 1 of 1; (5) 1 of 2; (6) 1 of 2. Double infections: two host individuals, one each from positions (1) and (2), had double infections of P. lophii and C. lophii. Host length range: (1) 41–64 cm; (2) 45–66 cm; (3) and (4) lengths unknown. Collection number: 2005: 7: 1: 3. Description Trophozoite (Figures 10, 11) disporous, ovoid with a single lobopodium sometimes bifurcating at its tip, which is attached to the wall of the gall bladder. Ectoplasm dense and clearly demarcated. Endoplasm fine, lightly staining. Dimensions, based on 8 fixed specimens: 25.6–35.2 x 14.4 –32.0. Spore (Figures 12, 13, 14, 15,) triangular or rhomboidal with pointed tips in sutural view, flat and curved in valvular view. Sutural line prominent and raised (this feature can be seen in Figure 14, but is obscured in Figures 12 and 13 by the enveloping alate processes). Sporoplasm binucleate. Valve shells drawn out into two delicate broad alate processes that join together at their proximal extremities forming a parachute-like structure over the valves. The valves are often observed folded over with the alate processes covering them (Figure 13). Polar capsules oval, terminal, in close proximity to one another and overlapping in sutural view. Polar filament wide, flat, deeply staining and with only 1.5–2 coils. Dimensions, based on 30 fixed spores, as ranges with means ± SD in parentheses: spore length 7.2 –10.0 (9.8 ± 1.6); spore width, including alate processes 21.6–28.8 (25.9 ± 2.8); spore width, excluding alate processes 16.8–22.6 (18.2 ± 1.2); spore thickness 15.2 – 20.8 (17.5 ± 1.01); polar capsule length: 3.8–5.4 (4.3 ± 0.7); polar capsule width: 3.0–4.0 (3.6 ± 0.2); polar capsule length: spore length = 1: 2.0– 3.2; spore length: spore width = 1: 3.2–4.3. Discussion Pseudalataspora lophii n. sp. differs from the other 11 species of Pseudalataspora described to date in the dimensions of the spore (Table 3) and in having alate processes that cover the spore body. The numbers of coils of the polar filament are not given in the descriptions of most of these species, but the figures indicate that none has less than three, as compared with a maximum of only two coils for P. lophii n. sp. The function of the parachute-like alate processes that cover the spore of P. lophii would appear to be to facilitate the distribution of the spore after release from the host. Lophius spp. are ambush predators that immerse themselves in the substrate with a shuffling motion (Laurensen et al., 2004). This behaviour would tend to throw myxosporean spores up and away from the infected host and the alate processes would then assist in their further dispersal. Whether this might result in direct infection of other anglerfishes or of an invertebrate alternative host is unknown. Only one marine myxosporean life cycle has so far been shown to require an invertebrate host (Køie et al., 2004), although actinosporean stages have been found in several species of marine polychaetes and oligochaetes. On the other hand, there is also evidence of direct fish-to-fish transmission of marine myxosporeans (Diamant, 1997; Yasuda et al., 2002). As with the genus Alataspora, Pseudalataspora has been referred to erroneously in the literature as Pseudalatospora or Pseudoalatospora, the latter being the misspelling by Lom & Dykova (1992). Three species of myxosporean are now known to infect the gall bladders of L. piscatorius, while two species are known to infect the gall bladders of L. budegassa. Evidence from the literature and from the present study suggest that these parasites have different endemic areas, which makes them potentially useful candidates as biological tags in population studies of their fish hosts. Recent genetic studies have suggested that stocks of L. piscatorius in the northern part of its distribution are part of a single more or less panmictic reproductive population (O’Sullivan et al., 2006). Parasites, however, can often be used to identify subpopulations of fish distinguished by certain behavioural differences, but which genetic studies may not pick up because there is still a considerable amount of gene flow between them (MacKenzie & Abaunza, 2005). In future studies we plan to examine more anglerfish samples from different parts of their geographical distribution to test if their myxosporean gall bladder parasites can be used to reveal finer details of host population structure.Published as part of Afonso-Dias, Isabel, Kalavati, Chaganti, Mackenzie, Ken & Mackenzie, Kevin S., 2007, Three new species of Myxosporea (Bivalvulida: Ceratomyxidae: Alatasporidae) from the gall bladders of anglerfishes Lophius spp. (Teleostei: Lophiidae) in the Northeast Atlantic Ocean, pp. 35-46 in Zootaxa 1466 on pages 42-45, DOI: 10.5281/zenodo.17657
Geology of Graham Island, British Columbia
No full textby J.D. Mackenzie.Series ; Bulletin (Geological Survey of Canada : 1921). Geological series ; no. 72. Memoir (Geological Survey of Canada) ; 88. Accompanies Southern portion of Graham Island, Queen Charlotte Islands, British Columbia [cartographic material] / geology, J.D. Mackenzie ; geography, British Admiralty and Department of the Naval Service of Canada, Department of Lands, British Columbia, J.D. MacKenzie ; C.O. Senecal, geographer and chief draughtsman. Two folded maps in pocket
Ceratomyxa lophii Afonso-Dias, Kalavati, Mackenzie & Mackenzie, 2007, n. sp.
No full textCeratomyxa lophii n. sp. (Figures 1–3) Material studied Host: Lophius piscatorius L. Site of infection: gall bladder. Locality, dates and depths: (1) 58 ° 51 ˏN, 07° 35 ˏW (NW of Scotland), 30 March, 2000, 250m; (2) 58 ° 45 ˏN, 07° 49 ˏW (NW of Scotland), 30 March, 2000, 400m. Prevalence: (1) 6 of 16 (37 %); (2) 8 of 26 (31 %). Host length range: (1) 41–64 cm; (2) 45–66 cm. Collection number: 2005: 7: 1: 1. Description Trophozoite (or pseudoplasmodium) (Figure 1) spherical or slightly ovoid, di- or tri-sporous, with short finger-like pseudopodia. Endoplasm distinct, finely granular. Dimensions, based on 6 fixed specimens: 20.0– 26.8 x 16.0–20.0. Spore (Figures 2, 3) asymmetrical, banana-shaped, one end more pointed than the other. Valves unequal, smooth, larger valve slightly bent. Sutural line straight, thin. Sporoplasm binucleate, extends below polar capsules. Polar capsules spherical, subterminal. Polar filament tightly coiled, with 7–8 coils. Dimensions, based on 30 fixed spores, as ranges with means ± SD in parentheses: spore length 5.6 –8.0 (7.1 ± 0.6); spore thickness 30.0– 39.6 (34.9 ± 2.7); thickness of larger valve 18.0–25.0 (21.0 ± 2.6), and of smaller valve 12.0–18.0 (14.8 ± 1.2); diameter of polar capsule 3.0– 5.4 (4.1 ± 0.7); polar capsule length: spore length = 1: 1.4–2.6; spore length: spore width = 1: 3.5–6.8. Discussion Eiras (2006) listed 147 nominal species of the genus Ceratomyxa from fish hosts, the most common site of infection being the gall bladder. One species of Ceratomyxa, C. appendiculata, was described by Thélohan (1895) from both L. piscatorius and L. budegassa off the Atlantic and Mediterranean coasts of France and was subsequently reported from L. budegassa in the Adriatic Sea by Lubat et al. (1989). It was most recently reported by Maillo et al. (2004) from 58.2 % of L. budegassa caught in the western Mediterranean and we recently found what appeared to be the vegetative stages of C. appendiculata in the gall bladder of one L. piscatorius caught off the west coast of Portugal (unpublished result). Ceratomyxa lophii n. sp. differs markedly from C. appendiculata in having unequal spore valves, and in the form of the trophozoite, which in C. appendiculata is polymorphic with from one to six pointed pseudopodia. Unequal spore valves have been described from other species of Ceratomyxa. The seven species with the most marked differences in size between valves are compared with C. lophii in Table 1. In only one other species— C. inaequalis Doflein, 1898 —is the difference in size and shape between the two valves close to that observed in C. lophii n. sp.. Ceratomyxa inaeqaulis was described from the labrid fishes Symphodus mediterraneus and S. tinca in the Mediterranean Sea. Its spores are similar in gross dimensions to those of C. lophii n. sp., but the difference in length between the two spore valves is much smaller. The form of the trophozoite is also different between the two species, that of C. inaequalis being teardrop-shaped with usually one long pointed pseudopodium, in contrast to the spherical or ovoid shape and short blunt pseudopodia of C. lophii n. sp. Given these marked morphological differences and the fact that the two species have been reported from different host species and from locations a considerable distance apart, we consider them to be separate species. Ceratomyxa lophii was found only in samples of L. piscatorius caught at the edge of the continental shelf to the northwest of the Outer Hebrides. It may therefore have a more restricted and northerly distribution than its congener C. appendiculata. Species of Ceratomyxa Spore Polar capsule Host Locality Length Thickness Length Width C. lophii n sp. 5.6 –8.0 30.0– 39.6 3.0– 5.4 3.0– 5.4 Lophius piscatorius Northwest of Scotland C. acanthuri Kpatcha, Die- 10.0–12.0 16.0–18.0 2.0– 3.2 2.0– 3.2 Acanthurus monroviae Senegal bakate, Faye and Toguebaye, hippoglosus, Reinhardtius,Published as part of Afonso-Dias, Isabel, Kalavati, Chaganti, Mackenzie, Ken & Mackenzie, Kevin S., 2007, Three new species of Myxosporea (Bivalvulida: Ceratomyxidae: Alatasporidae) from the gall bladders of anglerfishes Lophius spp. (Teleostei: Lophiidae) in the Northeast Atlantic Ocean, pp. 35-46 in Zootaxa 1466 on pages 36-38, DOI: 10.5281/zenodo.17657
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