250,668 research outputs found
What Do They Think and Feel About Growth? An Expectancy-Value Approach to Small Business Managers' Attitudes Toward Growth.
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Ophryotrocha mammillata Ravara, Marcal, Wiklund & Hilario 2015
No full text<i>Ophryotrocha mammillata</i> Ravara, Marçal, Wiklund & Hilário, 2015 <p> <i>Ophryotrocha mammillata</i> Ravara <i>et al.</i>, 2015: 5, figs 4–12 (type locality: Setúbal Canyon, W Portugal, NE Atlantic).</p> Material examined <p>MOROCCO • 2 specs (ethanol), 1 spec. (slide preparation); GoC, Mercator MV, 35°17.916′ N, 06°38.709′ W; 354 m depth; 2 Mar. 2008; Stn 64PE284_12750W; wood substrata; DBUA0002279.01 • 1 spec. (ethanol); GoC, Meknès MV; 34°59.091′ N, 07°04.424′ W; 698 m depth; 20 May 2009; Stn B09- 14b_03A; alfalfa substratum; DBUA0002280.01 • 1 spec. (ethanol); GoC, Darwin MV; 35°23.523′ N, 07°11.513′ W; 1100 m depth; 19 May 2009; Stn B09-14b_02W; wood substratum; DBUA0002280.02 •</p> <p>2 specs (formalin), 3 specs (paragenophores, in ethanol); same collection data as for preceding; 19 May 2009; Stn B09-14b_02A; alfalfa substrata; DBUA 0002280.03.</p> <p> <b>Additional material</b></p> <p>PORTUGAL • 2 specs (ethanol); WIM, Setúbal Canyon; 38°16.856′ N, 09°06.734′ W; 1000 m depth; 22 Aug. 2012; on bone material from an experimentally deployed cow carcass; DBUA0001555.04.</p> Remarks <p> This species was recently described from an experimentally deployed mammal carcass for a similar amount of time (approximately 18 months) at the Setúbal Canyon (WIM) (Ravara <i>et al.</i> 2015). The morphological identification was confirmed with molecular analyses (Fig. 2). This study extends its distribution to the Gulf of Cadiz where it occurred associated with experimentally deployed wood and alfalfa substrata. Curiously, <i>O. mammillata</i> was not found in the wood-fall collected at Estremadura Spur (WIM), a site very close to its type locality. It is worth mentioning here that in the GoC only five specimens of <i>O. mammillata</i> were retrieved, compared to 198 specimens previously reported from the Setúbal Canyon (Ravara <i>et al</i>. 2015).</p> Ecology and distribution <p> NE Atlantic: from Setúbal Canyon (West Iberian Margin) to the Gulf of Cadiz. Found in experimentally deployed organic falls (mammal carcasses, wood and alfalfa substrata), at a depth of 354–1100 m (Ravara <i>et al.</i> 2015; present study).</p>Published as part of <i>Ravara, Ascensão, Wiklund, Helena & Cunha, Marina R., 2021, Four new species and further records of Dorvilleidae (Annelida, Polychaeta) from deep-sea organic substrata, NE Atlantic, pp. 44-81 in European Journal of Taxonomy 736</i> on pages 63-64, DOI: 10.5852/ejt.2021.736.1251, <a href="http://zenodo.org/record/4570204">http://zenodo.org/record/4570204</a>
Low incidence of toxoplasma infection during pregnancy and in newborns in Sweden
No full textTo estimate the burden of disease due to congenital toxoplasmosis in Sweden the incidence of primary infections during pregnancy and birth prevalence of congenital toxoplasmosis in 40978 children born in two regions in Sweden was determined. Women possibly infected during pregnancy were identified based on: 1, detection of specific IgG based on neonatal screening of the phenylketonuria (PKU) card blood spot followed by retrospective testing of stored prenatal samples to detect women who acquired infection during pregnancy and follow up of their children to 12 months; 2, detection of specific IgM on the PKU blood spot. The birth prevalence of congenital toxoplasmosis was 0·73/10000 (95% CI 0·15–2·14) (3/40978). The incidence of primary infection during pregnancy was 5·1/10000 (95% CI 2·6–8·9) susceptible pregnant women. The seroprevalence in the southern part was 25·7% and in the Stockholm area 14·0%. The incidence of infection during pregnancy was low, as the birth prevalence of congenital toxoplasmosis. Neonatal screening warrants consideration in view of the low cost and feasibility
Ophryotrocha scutellus Wiklund, Glover & Dahlgren 2009
No full textOphryotrocha scutellus Wiklund, Glover & Dahlgren, 2009 Figs 11–12 Material examined MOROCCO • 11specs (plus2cf.)(formalin), 2specs (slide preparation);GoC,Mercator MV; 35°17.916′N, 06°38.709′ W; 354 m; 2 Mar. 2008; Stn 64PE284_12750W; wood substrata; DBUA0002288.01 • 1 spec. cf. (formalin); same locality as for preceding; 3 Mar. 2008; Stn 64PE284_12752A; alfalfa substratum; DBUA0002288.02 • 1 spec. (ethanol); same collection data as for preceding; 19 May 2009; Stn B09- 14b_01W; wood substratum; DBUA0002287.05 • 1 spec. (ethanol), 7 specs (formalin), 3 specs (slide preparation); GoC, Meknès MV; 34°59.091′ N, 07°04.424′ W; 698 m; 20 May 2009; Stn B09-14b_03W; wood substrata; DBUA0002287.03 • 3 specs (ethanol), 1 spec. (formalin); same locality and date as for preceding; Stn B09-14b_03A; alfalfa substrata; DBUA0002287.04 • 4 specs (ethanol), 1 spec. (formalin), 1 spec. (slide preparation, hologenophore); GoC, Darwin MV; 35°23.523′ N, 07°11.513′ W; 1100 m; 19 May 2009; Stn B09-14b_02A; alfalfa substrata; DBUA0002287.01 • 1 spec. (ethanol); same locality and date as for preceding; Stn B09-14b_02C; carbonate substratum; DBUA0002287.02. Additional material PORTUGAL • 6 specs (ethanol); WIM, Setúbal Canyon; 38°16.856′ N, 09°06.734′ W; 1000 m depth; 22 Aug. 2012; on bone material from a cow carcass; DBUA0001557.01-02. SWEDEN • 12 specs (ethanol); coastal Skagerrak; 58°53.1′ N, 11°06.4′ E; 125 m depth; on bone material from a minke whale carcass; DBUA0002348. Description (amended) Size of WIM and GoC specimens varies within 1.55–2.70 mm long and 0.24–0.39 mm wide for 18–24 chaetigers. Skagerrak specimens are larger, up to 3.60 mm long and 0.75 mm wide for 31 chaetigers (Fig. 3). Body dorso-ventrally flattened, with similar width throughout the body, abruptly ending with pygidium in smaller specimens (Fig. 11A) or tapering slightly at posterior end in larger ones. Prostomium broadly rounded, dorso-ventrally flattened, with a transverse ridge between the antennae, without eyes (Fig. 11A). Antennae and palps long, digitiform; antennae inserted mid-dorsally on the prostomium; palps inserted laterally. Peristomium achaetous, with two rings slightly narrower and shorter than the following segments. Jaw apparatus heavily sclerotized, well visible through the specimen body, usually with an apparent rhombus shape (Fig. 11 A–B).The morphology of mandibles and maxillary forceps varies with the specimen size (Fig. 12 A–J). Mandibles rod-like; smaller specimens with straight and clearly dentate anterior end and long apophyse, well surpassing the cutting edge, with a diagonal connection to the shaft (Fig. 12A); with growth, the teeth wear out (Fig. 12B) and the cutting edge becomes short and more curved forward, without teeth, the apophyse becomes thicker with an almost vertical connection to the shaft (Fig. 12 D–E). Maxillae of P-type; forceps falcate, comb-like, slightly wider with up to 20 large teeth on the right side, and narrower with up to 26 thinner teeth on the left side (Fig. 12 F–G); with growth, the teeth of the left forcep become irregular (Fig. 12H) resulting in a clear alternation in size in larger specimens (Figs 11D, 12 I–J); eleven free denticles (D1–11), D1 similar to forceps (always with even teeth), D2 to D11 shovel-like, D4 to D11 usually directed inwards (Fig. 11 H–I); carrierlike structure with a toothed ridge on each side near the forceps (see details in Fig. 11D) and with a posteriorly fimbriate handle (Fig. 11D). Parapodia uniramous (Fig. 11C); pre-chaetal lamellae of median parapodia very long, cirriform; dorsal and ventral cirri digitiform, long (dorsal longer than ventral); sub-acicular lobes conical, about two-thirds the length of pre-chaetal lamellae in smaller specimens, becoming shorter in larger specimens (Fig. 12 K–N), with a needle-like acicula (Fig. 11E). Chaetae long and stiff; supra-acicular chaetae simple, slightly flattening and tapering distally to a fine tip, very lightly serrated, 7 per fascicle (Fig. 11G); sub-acicular chaetae compound with bifurcate, sub-distally serrated shafts, and falcate, very lightly serrated blades (Fig. 11F), 7–9 per fascicle. Pygidium with terminal anus, a pair of cirriform anal cirri and a very short (almost imperceptible) median stylet. Remarks This species was originally described from a minke whale carcass deployed at a depth of 125 m off Sweden and organically enriched sediments beneath a fish farm in Norway, at a depth of 104 m (Wiklund et al. 2009). Later, seven specimens of the same species were retrieved from an experimentally implanted cow carcass at the Setúbal Canyon (WIM), 1000 m depth (Ravara et al. 2015). The present study extends the distribution of O. scutellus to GoC where it occurred associated with experimentally deployed alfalfa and wood substrata and control samples (carbonate cubes), at a depth of 354–1100 m. The specimens from the GoC and WIM are overall smaller than the ones originally described from Sweden and Norway (Fig. 3) and exhibit some variation in the mandibular and maxillary morphology, apparently associated with growth (Fig. 12). However, the larger specimens of the southern locations entirely match the morphology of the northern ones. The morphological identification was furthermore confirmed with molecular analyses for both the larger and the smaller specimens. The specimen from GoC (DBUA0002287.01) sequenced here falls among previously published O. scutellus sequences (Genbank accession numbers GQ415506 and KP731544 -48) with within-species K2P values from the H3 alignment of 0.009–0.01, and a K2P value of 0.10 to the nearest species in the tree, O. chemecoli sp. nov. A similar variability in length and corresponding variation in the mandible morphology has earlier been described for other species, such as O. sadina and O. lusa (Ravara et al. 2015: figs 15, 25, respectively). Differing from what was stated in the original description, the specimens of O. scutellus studied here have eleven pairs of free denticles (instead of seven) in the maxillary apparatus, and the left forcep of the larger specimens have uneven teeth. These characters were also found in the specimens from off Sweden examined here (Figs 11–12). Thus, the original description is here amended accordingly. Ecology and distribution NE Atlantic: from Norway to the Gulf of Cadiz (Moroccan Margin). Found in mammal carcasses, organically enriched sediment beneath fish farms, wood, alfalfa and carbonate substrata, at a depth of 104–1100 m (Wiklund et al. 2009; Ravara et al. 2015; present study).Published as part of Ravara, Ascensão, Wiklund, Helena & Cunha, Marina R., 2021, Four new species and further records of Dorvilleidae (Annelida, Polychaeta) from deep-sea organic substrata, NE Atlantic, pp. 44-81 in European Journal of Taxonomy 736 on pages 67-70, DOI: 10.5852/ejt.2021.736.1251, http://zenodo.org/record/457020
Figure 7 from: Wiklund H, Taylor JD, Dahlgren TG, Todt C, Ikebe C, Rabone M, Glover AG (2017) Abyssal fauna of the UK-1 polymetallic nodule exploration area, Clarion-Clipperton Zone, central Pacific Ocean: Mollusca. ZooKeys 707: 1-46. https://doi.org/10.3897/zookeys.707.13042
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Ledella knudseni sp. n. A Holotype, specimen NHM_288c B Paratype, specimen NHM_288a C Specimen NHM 288a dissected prior to DNA sequencing and SEM D–G SEM of valve, hinge teeth and protoconch. Scale bars: 1 mm (B–C); 0.5 mm (D–E); 0.1 mm (F–G). Image attribution Glover, Taylor, Dahlgren & Wiklund, 2017
Ophryotrocha scutellus Wiklund, Glover & Dahlgren, 2009, sp. nov.
No full textOphryotrocha scutellus sp. nov. (Figs 1 A–D) Material examined: Northern North Atlantic, coastal Skagerrak, 58 ° 53.1 ’ N; 11 ° 06.4’ E, female with eggs, 6 mm long, 29 chaetigers, preserved in formaldehyde from experimental tank with bone material sampled from a minke whale carcass, which was implanted at 125 m depth, holotype (SMNH T- 7816); same location, 2 specimens, preserved in formaldehyde, paratypes (NHM 2009.25); same location, one specimen preserved in osmium for SEM, and several specimens preserved in ethanol for DNA extraction. Fishfarm in Mele, Hardangerfjord, 60 ° 21.27 ’N; 6 ° 20.89 ’E, 104 m depth, several specimens preserved in formalin. Description: Body shape elongated, uniform width for majority of body length, tapering slightly at posterior end. Colour transparent, with white eggs visible in females. (Fig. 1 A). Prostomium round and dorso-ventrally flattened, disc-like. Eyes lacking. Long cirriform paired antennae inserted dorsally, reaching to first chaetiger, equally long palps cirriform inserted lateroventrally on prostomium. Jaws of P-type, mandibles rod-like without any serration. Maxillae with seven pairs of free denticles (Fig. 1 B). Two peristomial achaetous segments. Parapodia uniramous with long dorsal and ventral cirri and cirriform acicular lobe, supraacicular chaetae simple, subacicular chaetae compound with serrated blades (Figs 1 C–D). Subacicular chaetal lobe with simple chaeta. Pygidium with terminal anus, two pygidial cirri as long as antennae and palps laterally and a short, nublike unpaired appendage ventrally. Distribution: Known from a minke whale carcass at 125 m depth (58 ° 53.1 ’N; 11 °06.4’E) in the Koster area in Sweden, and from sediment sampled at 104 m depth beneath a fish farm in Hardangerfjord (60 ° 21.27 ’N; 6 ° 20.89 ’E) in Norway. Reproduction: Eggs present in females from chaetiger 5 and in all segments to posterior end of body. No data available on the presence of sperm. Ecology: Live observation in aquarium experiments show adult specimens crawling on filamentous bacterial mats on the whale bones, and bacterial pellets are present in the worms guts, indicative of a bacterial diet. Etymology: Ophryotrocha scutellus is named after its flattened disc-like head, scutella is the latin word for flat dish or saucer. Remarks: Ophryotrocha scutellus has a rounded dorso-ventrally flattened head-form, shaped like a disc. Another Ophryotrocha that is reported to have flattened prostomium is O. platykephale, from which O. scutellus differs in jaw morphology, form of parapodia and absence of branchiae. Accession numbers for DNA sequences from O. scutellus, published on GenBank: GQ 415469 (16 S), GQ 415488 (COI), GQ 415506 (H 3).Published as part of Wiklund, Helena, Glover, Adrian G. & Dahlgren, Thomas G., 2009, Three new species of Ophryotrocha (Annelida: Dorvilleidae) from a whale-fall in the North-East Atlantic, pp. 43-56 in Zootaxa 2228 on pages 46-48, DOI: 10.5281/zenodo.19025
The Race biology of the Swedish Lapps. Part I : General survey, prehistory, demography, future of the Lapps, with the collaboration of... K. B. Wiklund. Edited by H. Lundborg,... S. Wahlund,...
No full textLes p. 11-14 contiennent un texte de K. B. Wiklund intitulé "Prehistory of the Lapps". - The Swedish State institute for race biology.Swedish State institute for race biology
Ophryotrocha eutrophila Wiklund, Glover & Dahlgren, 2009, sp. nov.
No full textOphryotrocha eutrophila sp. nov. (Figs 3 A–F) Material examined: Northern North Atlantic, coastal Skagerrak, 58 ° 53.1 ’ N; 11 ° 06.4’ E, female with eggs, 8 mm long, 32 chaetigers, preserved in formaldehyde from experimental tank with bone material sampled from a minke whale carcass, which was implanted at 125 m dept, holotype (SMNH T- 7818); same location, four specimens, two males and two females, preserved in formaldehyde, paratype (NHM 2009.27); same location, seven specimens preserved in formaldehyde, two specimens preserved in osmium for SEM, and several specimens preserved in ethanol for DNA extraction. Description: Colour transparent, females with eggs distinctly larger than males (Figs 3 A, B). Body shape elongated, of generally uniform width, tapering slightly at posterior end. Prostomium with digitiform paired antennae inserted dorsally. Palps papilliform, inserted laterally on prostomium. No eyes. Mandibles rodlike, with anterior dentition. K-type maxillae with smooth forceps and 7 pairs of free denticles (Fig. 3 D). Maxillae of P-type with 7 free denticles (Fig. 3 E). Two peristomial achaetous segments, parapodia uniramous with short dorsal and ventral cirri (Fig. 3 F), supraacicular simple chaetae with serration distally, subacicular chaetae compound, blades with serration (Fig. 3 C), subacicular chaetal lobe with simple chaeta. Pygidium with terminal anus, two pygidial cirri laterally inserted and an unpaired appendage ventrally placed. Distribution: Known from an aquarium containing bones taken from a minke whale carcass at 125 m depth (58 ° 53.1 ’N; 11 °06.4’E) in the Koster area in Sweden. Reproduction: Egg masses form a tube in which the female crawl, the tube loosely attached and not covered by a hard surface like in O. labronica (Paxton & Åkesson, 2007). No data on the distribution of eggs or sperm among the segments of the worms. Etymology: Ophryotrocha eutrophila is named after its habitat choice, seemingly liking organically enriched environments (eutrophic=organically enriched, philus=like). Remarks: This species resembles O. puerilis in jaw morphology. Ophryotrocha eutrophila is dimorphic, with males commonly smaller than females and possess K-type maxillae, similar to O. puerilis. Ophryotrocha eutrophila is genetically different from O. puerilis and differs in the absence of eyes and the presence of a well developed median pygidial stylus. Ophryotrocha eutrophila is also similar to O. fabriae Paxton & Morineaux, 2009 described from a hydrothermal vent on the Mid-Atlantic Ridge. It differs from O. fabriae in the form of the mandibles. Accession numbers for DNA sequences from O. eutrophila, published on GenBank: GQ 415460 (16 S), GQ 415475 (COI), GQ 415494 (H 3).Published as part of Wiklund, Helena, Glover, Adrian G. & Dahlgren, Thomas G., 2009, Three new species of Ophryotrocha (Annelida: Dorvilleidae) from a whale-fall in the North-East Atlantic, pp. 43-56 in Zootaxa 2228 on pages 49-50, DOI: 10.5281/zenodo.19025
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