201,489 research outputs found
Objective reporting of scientific results is critical for maintaining relationships with industry and achieving conservation outcomes for fisheries
No full textD. J. Hamer, T. M. Ward & R. McGarve
Brevitibius oongongololo Vohland & Hamer 2013, sp. n.
No full textBrevitibius oongongololo Vohland, sp. n. <p>Figs 38–43</p> <p> Etymology: From OshiWambo <i>oongongololo</i> (a millipede).</p> <p>Diagnosis: Tibial process of telopodite originating proximally to knee of solenomere (Fig. 39). Median lamella of telocoxite longer than lateral lamella and apically acute, lateral conus long, slender and strongly distally directed (Figs 38, 39).</p> <p>Description:</p> <p> <i>Size</i>: Holotype with 55 segments, mid-body width 8.7 mm, length about 90 mm; male paratype with 57 segments.</p> <p> <i>Colour</i>: Badly preserved, giving striped appearance.Animal dark brown, prozonites yellowish, metazonites green-brown up until black ozopores, distally dark brown, reddish brown bordered, limbus orange. Head, antenna, legs and anal segment dark brown.</p> <p> <i>Head</i>: Epicranial suture and interocular suture distinct. Frons slightly wrinkled. Mentum and prebasilare merged (Fig. 42). Antenna short, reaching back to 2 nd segment only.</p> <p> <i>Collum</i>: Broadly surrounded with about 3 strong folds, subquadratic, anteriorly broadly rounded (Fig. 43).</p> <p> <i>Tergites and sternites</i>: Rows of punctures on prozonites visible. Prozonites with oblique striae, metazonites with longitudinal striae below ozopores. Sternites with oblique striae. Paraprocts with distinct median bulge.</p> <p> <i>Legs</i>: Pads on legs absent, but spines present on all podomeres (Fig. 40).</p> <p> <i>Gonopods</i>: Gonopod telocoxite with median lamella extending beyond distal margin of lateral lamella. Telopodite with tibial process (Figs 38, 39, <i>tp</i>) on solenomere, its tip hidden in a fold of the solenomere.</p> <p>Holotype: ♂ NAMIBIA: Kaoko Otavi [18°18'00"S 13°42'00"E, 700 m], 27.xi.1970, P.G. Olivier (SMN 21639) (NMNW).</p> <p>Paratypes: 1♀ 1 juv. same data as holotype (SMN 21639) (NMNW).</p> <p>Other material examined: NAMIBIA: 1♂ 2 juv. Ovamboland, 17°53'S 14°13'E, 9.x.1993, M. Griffin & M.A. de Kock (SMN 22043) (NMNW).</p> <p>Distribution: At present, recorded from northern Namibia in the Kunene district and Ovamboland (Fig. 37).</p>Published as part of <i>Vohland, Katrin & Hamer, Michelle, 2013, A review of the millipedes (Diplopoda) of Namibia, with identification keys and descriptions of two new genera and five new species, pp. 251 in African Invertebrates 54 (1)</i> on pages 271-27
Metaphora Redman & Hamer & Barraclough 2003, gen. n.
No full textMetaphora gen. n. Redman Type species here designated: Spirostreptus (Nodopyge) spirobolinus (Karsch, 1881). Etymology: L. meta = conical or pyramidal structure. This refers to the conical shape of the lateral margin of the telocoxite. Gender feminine. Diagnosis: Telopodite with two femoral spines, subequal in length (Fig. 61). Posterior limb of telopodite comprising three branches apically: (a) elongate and ribbon-like pectinophore, (b) concave spine branch with dentate margin, (c) long, narrow, cylindrical, tapering spine with slight curvature and spiniform processes on its surface (Fig. 65). Telocoxite reflexed, but fold on the distal rather than the lateral margin of telocoxite (Fig. 61). First pair of male legs with apex of prefemoral process subtriangular and directed orally obliquely at point of contact with coxal shelf. Syncoxosternum medially suturate between coxal elements. Coxal shelf tumid (Fig. 60). Distribution: Northern and Western Cape in the fynbos and the succulent Karoo biomes (Fig. 1). Remarks: The telocoxal folds are formed from the distal end of the telocoxite rather than from the lateral surface, as is observed in Zinophora and Poratophilus. The pectinophore in M. spirobolina resembles that observed in H. arida and H. diplocrada, but the third branch (a narrow, curved and pointed spine directed towards other apical elements) clearly distinguishes Metaphora from Harpagophora. The third branch is also not the same as the third branch in Zinophora and Poratophilus, therefore representing a character unique to M. spirobolina. While the two femoral spines initially suggest that M. spirobolina is a member of Harpagophora, the form of the abovementioned characters clearly separate it from that genus. The femoral spines in M. spirobolina are subequal in length and diameter, unlike in Harpagophora where one of the femoral spines is always longer, larger and more robust than the other. It is here proposed—based on the evidence presented above—that M. spirobolina be recognised as representing a distinct genus.Published as part of Redman, Guy T., Hamer, Michelle L. & Barraclough, David A., 2003, Revision of the Harpagophoridae (Diplopoda, Spirostreptida) of southern Africa, including descriptions of five new species, pp. 203-277 in African Invertebrates 44 (2) on page 228, DOI: 10.5281/zenodo.766630
Newspaper article, Hamer Calls for Mississippi Change, January 10, 1969
No full textIn this newspaper article, Abbott described the main themes in Fanny Lou Hamer\u27s speech. Growing up in Sunflower County, working as a sharecropper, and voter intimidation are all aspects of Hamer\u27s background and her decision to become an activist.https://scholarsjunction.msstate.edu/ua-reflectors-1965-1975/1423/thumbnail.jp
Mytilus galloprovincialis carbonic anhydrase II: Activity and cDNA sequence analysis
No full textThe esterase activity of carbonic anhydrase (CA) was investigated in mussels sampled at 24 locations along the Croatian coast of Adriatic Sea. The gills were the target tissue because the respiratory, ionic transport and pH regulatory enzyme function of CA and its potential usage as biomarkers of environmental pollution was the main topic. Total esterase activity was measured in cytosolic fraction by colorimetric end-point reaction using p-nitrophenyl acetate as enzyme substrate. CA activity was estimated by the same enzymatic reaction using acetazolamide as a specific CA inhibitor. The results of total esterase activities in winter (March; all sites average value 0.137±0.057) were lower than determined for summer season (August; 0.153±0.036) at almost all investigated locations. CA activities determined in gills of mussel sampled in winter ranged from 1.75% to 24.65% of total esterase activities and in summer samples were lower (0.83 to 13.45%). Although recent research showed potential application of CA activity in bioassay and biomarker in pollution studies, further research is needed. Here we report a short-term simple colorimetric microplate method which can be applied for analyses of large numbers of samples. Furthermore in this study we characterized full length coding sequence (cDNA) of M. galloprovincialis carbonic anhydrase II (CAII). The CAII cDNA (with the 5’ and 3’ untranslated regions) is 1317 bp long. The putative open reading frame encodes a polypeptide of 256 amino acids, with a theoretical pI/Mw 5.87/28.416 kDa and conserved domains (active site and zinc binding site)
Temnothorax haveni Lee, Hamer & Guenard 2023, sp. nov.
No full text<i>Temnothorax haveni</i> Lee, Hamer & Guénard sp. nov. <p>urn:lsid:zoobank.org:act: D5640CE1-BA4A-469B-959B-444695F094C3</p> <p>Figs 3–5</p> Diagnosis <p>Head subquadrate; lateral margins of head subparallel in full face view; clypeus with longitudinal carinae extending only in the anterior half; scapes not reaching occipital head margin; in lateral view promesonotum convex, followed by a concave mesopropodeal depression at the junction with the propodeum; promesonotal suture visible in lateral view only; metanotal groove absent; propodeal spines well-developed with thick base, long and curved pointing backwards; head and mesosoma glabrate; head, mesosoma and gaster covered with scarce erect, stout setae. Core body concolorous ochreous-yellow.</p> Etymology <p> The specific epithet ‘haveni’ is a noun in English. This was the first species of <i>Temnothorax</i> recorded in Hong Kong, one of the most urbanized cities but with 40% of the land designated as protected areas for biodiversity conservation, providing havens for countless species and those awaiting discovery.</p> Material examined <p> <b>Holotype</b> CHINA • worker; Hong Kong SAR, Hong Kong Island, Aberdeen Reservoir; 22°15′32.04″ N, 114°9′34.56″ E; 190 m a.s.l.; 27 Jun. 2017; Roger H. Lee and Yuet Yin Ling leg.; ground baiting; ZRC RHL03433.</p> <p> <b>Paratypes</b> (n = 8) CHINA – <b>Hong Kong SAR</b> • 1 worker; Mui Wo (Lantau Trail); 22°15′41.76″ N, 114°0′6.84″ E; 38 m a.s.l.; 15 Aug. 2022; André Ibáñez and Matthew T. Hamer leg.; Winkler; HKBM ANTWEB1010974 [MW1T1W4-5] • 1 worker; Hong Kong Island, Lung Fu Shan; 22°16′45.48″ N, 114°8′13.92″ E; 231 m a.s.l.; 14Apr. 2022; Matthew T. Hamer leg.; hand collection on ground; HKBM ANTWEB1010976 • 1 worker; Hong Kong Island, Aberdeen Reservoir; 22°15′32.04″ N, 114°9′34.20″ E; 192 m a.s.l.; 27 Jun. 2017; Roger H. Lee leg.; ground baiting; HKBM RHL03467 [RHL5265] • 1 worker; Hong Kong Island, The Peak; 22°16′24.96″ N, 114°8′20.04″ E; 391 m a.s.l.; 11 Jul. 2017; Roger H. Lee leg.; hand collection; HKBM RHL03474 [RHL5272] • 1 worker; Tai Po Kau Nature Reserve; 22°25′12.72″ N, 114°10′35.76″ E; 349 m a.s.l.; 23 Aug. 2022; Shaolin Han leg.; arboreal baiting, 20 meters high; IBBL ANTWEB1010993 [TPK_S1_T3] • 1 worker; Fanling, Fanling Golf Course; 22°29′25.44″ N, 114°6′37.08″ E; 48 m a.s.l.; 23 May 2022; Matthew T. Hamer and André Ibáñez leg.; ground baiting; IBBL ANTWEB1010975 [FGE1T2B2-1] • 1 worker; Girl Guides Pok Hong Campsite; 22°22′16.68″ N, 114°11′46.68″ E; 84 m a.s.l.; 24 Jun.–1 Jul. 2022; Matthew T. Hamer and André Ibáñez leg.; flight interception vane trap; IBBL ANTWEB1010987 [GGPH2V2-1] • 1 worker; Tsing Yi, Tsing Yi Peak; 22°20′35.16″ N, 114°5′59.64″ E; 244 m a.s.l.; 16 Mar. 2018; R. Cheung and M. Law leg.; Winkler; IBBL ANTWEB1016704 [TYP S1-R].</p> Description <p>MEASUREMENTS (n = 9). Holotype (n = 1); CL 0.55; CW 0.54; CWb 0.50; SL 0.4; WL 0.65; SPST 0.23; PEL 0.29; PPL 0.15; PEH 0.16; PPH 0.16; PW 0.34; SPBA 0.12; SPTI 0.17; PEW 0.13; PPW 0.18; ATL 0.62; HS 0.52; SI 80.6; CI 91.58; SBI 23.2; PSI 35.02; PWI 145.6; PLI 194.63; TL 2.26. Paratypes (n = 8); HL 0.51–0.55; CW 0.5–0.55; CWb 0.44–0.5; SL 0.35–0.41; WL 0.61–0.69; SPST 0.23–0.29; PEL 0.25–0.32; PPL 0.12–0.17; PEH 0.14–0.18; PPH 0.15–0.16; PW 0.3–0.34; SPBA 0.1–0.17; SPTI 0.11–0.18; PEW 0.11–0.12; PPW 0.16–0.18; ATL 0.46–0.58; HS 0.47–0.53; SI 75.71–87.67; CI 86.22–92.04; SBI 21.1–37.66; PSI 36.99–41.84; PWI 140.16–151.35; PLI 160–229.41; TL 1.99– 2.22.</p> <p>HEAD. In full face view, head subquadrate, longer than broad (CI 86.22–92.04), with weakly convex sides and occipital margin, rounded occipital corners. Clypeus widely inserted between antennal lobes; anterior margin weakly convex and angulate medially; three clypeal carinae present. Mandible broadly triangular, masticatory margin with five teeth, apical most tooth larger than preceding teeth. Frontal carinae weak but moderately long, extends from the antennal insertions to the area of the vertex; frontal lobes present. Antenna with 12 segments terminating in an incrassate three-segmented club; apical segment longer and broader than following segments. Scape of medium length (SI 78.57–87.67), terminating before posterior corners of the head. Eye convex; located medially on head and extending laterally beyond the cephalic capsule. In lateral view, eyes composed of 9–10 ommatidia across the longest width. In dorsal view, occipital carina present but weakly developed.</p> <p>MESOSOMA. In dorsal view, mesosoma widest at the middle portion of pronotum; humeri widely rounded; mesosoma weakly tapering posteriorly, reaching a minimum width at the anterior part to propodeum. Promesonotal suture absent dorsally but present laterally. Metanotal groove absent. In lateral view, promesonotum convex and follow by a distinct concavity at mesonotum, forming a weak promesonotal dome. Propodeal spiracle circular. Propodeal lobe round. Propodeal spines well-developed, long, and slightly downward curved toward the end; spines longer than the distance between their bases (SPST 0.23–0.29; SBPA 0.10–0.17), spines feebly diverge postero-laterally from the dorsal view. In lateral view, propodeal declivity subtly concave.</p> <p>METASOMA. In lateral view, petiole subtriangular, longer than high. Anterior face of petiole distinctly longer than posterior face; node with acute apex. Postpetiole short and convex. In dorsal view, postpetiole subquadrate; distinctly wider than petiole. Gaster wider than postpetiole; first gastral tergite long, as long as mesosoma; anterolateral corners obtusely angled.</p> <p>SETAE. In full face view, mandible dorsum with well-spaced sub-decumbent pilosity; anterior clypeal margin with two long and tapering setae on either side of clypeal median. Several sub-erect setae present on anterior clypeal margin, directed towards clypeal median. From clypeal dorsum to cephalic dorsum, covered with sparse, stout and erect setae that are spaced roughly equidistantly. Scapes and subsequent antennal segments with sub-decumbent to semi-erected pilosity. In lateral view, ventral part of head with scare erect to semi-erect pilosity, intertwined with stout-erect setae. Mesosoma with long, erect setae arranged in series of transverse rows, normally not more than five pairs. Mesosoma dorsum also with sparse, short decumbent and appressed setae between the long, erect, setae pairs; of propodeal spines also with a single pair of setae sub-apically. Posterior face of petiole dorsum with a few pairs of erect setae, anterior face lacking setae. Postpetiole dorsum with a few pairs of erect setae. Gastral tergite with scarce erect stout setae in varying length arranged in loose rows. Femur and tibia with short and appressed pubescence.</p> <p>SCULPTURE. In full face view, mandibles overlain by very weak lateral striae. Majority of clypeus dorsum smooth other than short, longitudinal carinae that begin at the clypeal anterior border. Dorsum of head, from clypeus to posterior head corners, glabrate. Dorsal pronotum, mesonotum and propodeum glabrate. Pronotum, mesonotum and propodeum overlain with faint but weak lateral striae laterally. Petiole and postpetiole dorsally and laterally weekly punctate-recticulate. Gaster comparatively smooth and shining.</p> <p>COLOUR. Core body concolorous ochreous-yellow. Setae across whole of body yellowish white. Gaster with dark brown patches laterally from dorsal and lateral view.</p> Comments <p> <i>Temnothorax haveni</i> sp. nov. would key out to <i>T. zhejiangensis</i> in Zhou <i>et al.</i> (2010) and shares several morphological characters. These characters include the presence of erect setae on the mesosomal dorsum, a pair of long slightly downcurved propodeal spines, humeri rounded in dorsal view, a short petiole peduncle and a petiole that is longer than high in lateral view. However, various characters differ, including the sculpture on the head dorsum, lateral and dorsum mesosoma being predominately glabrate in <i>T. haveni</i> rather than punctate in <i>T. zhejiangensis</i>. The mesosomal outline differs greatly between both species with a convex promesonotum followed by a distinct concavity forming a weak promesonotal dome in <i>T. haveni</i> but only slightly convex across its whole length in <i>T. zhejiangensis</i>. The petiole peduncle is narrower and slightly longer in <i>T. haveni</i> than in <i>T. zhejiangensis</i> being broader and shorter. The petiole node in <i>T. haveni</i> has an acute dorsal apex within <i>T. zhejiangensis</i> is subtriangular with a narrowly rounded dorsum. Similarly, <i>T. haveni</i> might be mistaken for <i>T. ruginosus</i> both species can be differentiated by size (<i>T. haveni</i> WL 0.61–0.69; <i>T. ruginosus</i> WL (ML in Zhou <i>et al</i>. (2010)) 1.80–1.84), as well as head and mesosomal sculpturing and the mesosomal outline. <i>Temnothorax haveni</i> may also be mistaken for <i>T. barrettoi</i> sp. nov., however, both species can be differentiated by the glabrate sculpture and more scarce erect stout setae over the body of <i>T. haveni.</i> We believe the above characters distinctly differentiate <i>T. haveni</i> from its congeneric species due to their uniqueness and consistency across all specimens examined. In fact, the lack of sculpture, particularly on the head, combined with distinct mesopropodeal depression, makes <i>T. haveni</i> morphologically distinct amongst Chinese <i>Temnothorax</i>. Further description of species of <i>Temnothorax</i> from other regions of Southeast Asia were examined with no species satisfying all characters.</p> Natural history <p> <i>Temnothorax haveni</i> sp. nov. has been collected from semi-open to closed canopy secondary forests throughout the territory of Hong Kong. Specimens are mostly found within leaf litter samples but have also been attracted to ground baiting. One worker of <i>T. haveni</i> was collected twenty metres above the ground in a tree from an arboreal bait sample within a secondary forest. An additional specimen was hand collected along a waist high handrail and another from a flight interception trap (vane trap) hung from a tree at head height. These samples may indicate <i>T. haveni</i> forages on shrubs or understorey vegetation, as well as within trees and could therefore be a predominately arboreal species, which may also forage occasionally on the forest floor. However, it is difficult to rule out individuals falling from plants due to unintentional vegetation interaction by samplers, which may explain specimens from Winkler samples and ground hand collection. Moreover, the lack of any whole nest samples from the mostly ground based sampling effort in Hong Kong (e.g., Winklers), indicates this species may not nest in leaf litter, with only singletons found and no reproductive caste thus far collected.</p> <p> While infrequently collected within Hong Kong, perhaps due to limited sampling towards arboreal species at this point, the species appears relatively widespread, being found on most larger islands and continental parts of the SAR (Fig. 5). <i>Temnothorax haveni</i> sp. nov. is thus expected to be found in the nearby province of Guangdong which shares a similar climate and habitats as Hong Kong.</p>Published as part of <i>Hamer, Matthew T., Lee, Roger H. & Guénard, Benoit, 2023, First record of the genus Temnothorax Mayr, 1861 (Formicidae: Myrmicinae) in Hong Kong, with descriptions of two new species, pp. 116-135 in European Journal of Taxonomy 879 (1)</i> on pages 124-129, DOI: 10.5852/ejt.2023.879.2165, <a href="http://zenodo.org/record/8155427">http://zenodo.org/record/8155427</a>
Tributyltin release from harbour sediments - Modelling the influence of sedimentation, bio-irrigation and diffusion using data from Bremerhaven
No full textThis study describes the potential release of TBT from harbour sediments based on model calculations for different sediment management scenarios applying a numerical one-dimensional FD-model. A conceptual model was developed focussing on the following processes involved in the transport of TBT: sorption equilibrium, diffusion, irrigation and sedimentation. Assuming TBT-concentration of 292 mu g/kg in the sediment, the diffusive release of TBT from sediments into the bottom water was calculated to 7.4 x 10(-7)-6.9 x 10(-6) mol m(-2) after 1 year and 7.4 x 10(-6)-1.6 x 10(-4) mol m(-2) after 100 years. In these scenarios, neither sedimentation nor capping were considered. Assuming a sedimentation at a rate of 1 cm/a, the polluted sediments will be covered with TBT-free suspended matter. A diffusive release of TBT will be prevented if no bio-irrigation takes place. Capping with a layer of sand of 50 cm thickness will decrease the diffusive release. If a reactive capping could be applied, the release of TBT into the bottom water would be stopped almost completely. The study shows that our model calculations enables us to compare different scenarios in sediment management based on available data. Additionally, it can provide information for risk assessment in the absence of data. sigma 2005 Elsevier Ltd. All rights reserved
Diabetes, glycaemic control, and risk of COVID-19 hospitalisation: population-based, prospective cohort study
No full textOBJECTIVE: We aimed to examine the prospective association of diabetes and glycaemic control with COVID-19 hospitalisation in a large community-based cohort study. METHODS AND STUDY DESIGN: Participants (N = 337,802, aged 56.4 ± 8.1 yr; 55.1% women) underwent biomedical assessments at baseline as part of the UK Biobank prospective cohort study. The outcome was cases of COVID-19 serious enough to warrant a hospital admission from 16-March-2020 to 26-April-2020. RESULTS: At follow up, 649 cases COVID-19 were recorded. In multivariable adjusted analyses, risk of COVID-19 was elevated in people with undiagnosed diabetes at baseline (A1C ≥ 6.5%) (risk ratio = 2.68; 95% confidence interval: 1.66, 4.33) and poorly controlled (A1C ≥ 8.6%) diagnosed diabetes (1.91;1.04, 3.52). There was a dose-dependent increase in risk of COVID-19 with increasing A1C, that persisted in multivariable adjusted models (per SD [0.9%]: 1.07; 1.03, 1.11; p[trend] < 0.001). CONCLUSION: In this large community-based sample, higher levels of A1C within the normal range was a risk factor for COVID-19. Glucose regulation may play a key role in immune responses to this infection. Undiagnosed cases of diabetes in the general community may present a particularly high risk
Life course psychological distress and cardiovascular disease risk factors in middle age: birth cohort study
No full textJ. Hamer, Karl Barth, L'occasionalisme théologique de Karl Barth, Etude sur sa méthode dogmatique, 1949
No full textN. M. J. Hamer, Karl Barth, L'occasionalisme théologique de Karl Barth, Etude sur sa méthode dogmatique, 1949. In: Revue des Sciences Religieuses, tome 23, fascicule 3-4, 1949. p. 410
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