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  • Articles  (167,840)
  • 2020-2024
  • 1975-1979  (167,840)
  • 1960-1964
  • 1978  (167,840)
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  • 2020-2024
  • 1975-1979  (167,840)
  • 1960-1964
Year
Journal
Topic
  • 1
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    De makrofauna van enkele extreme sloottypen in Noord-Holland en Utrecht (1978)
    In:  Verslagen en Technische Gegevens vol. 17 no. 1, pp. 1-15
    Details
    Publication Date: 2024-04-02
    Description: 1. Samples of benthic invertebrate fauna were collected in – a ditch, situated in a protected area in the peaty area near the Maarsseveense plassen (prov. Utrecht), – four ditches in the neighbourhood of Castricum (N-Holland), not far from the dune district, – two ditches with water of a high chloride-content on Texel (N- Holland). 2. The faunistic results, with the additional information of some physical and chemical data on the different sampling points, made it possible to draw some conclusions concerning – the importance of the factor salinity for a faunistically oriented typology of ditches, – the importance of the group Hydracarina for a classification of ditch-biocenoses, – the influence of artificial current, caused by the inlet of water, on the invertebrate fauna of ditches and on the faunistical evaluation of the pollution-level in ditches.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 2
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    Glyptothorax stocki, a new sisorid catfish from Pakistan and Azad Kashmir (Siluriformes, Sisoridae) (1978)
    In:  Bulletin Zoologisch Museum vol. 6 no. 11, pp. 79-85
    Details
    Publication Date: 2024-02-22
    Description: A new catfish, Glyptothorax stocki, belonging to the family Sisoridae, is described and figured. The new species from Pakistan and Azad Kashmir is compared with Glyptothorax platypogonoides from Sumatra, with which it was confused.
    Repository Name: National Museum of Natural History, Netherlands
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  • 3
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    Boekbespreking (1978)
    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 9 no. 1, pp. 15-19
    Details
    Publication Date: 2024-02-08
    Description: J. T. R. KALKHOVEN, A. H. P. STUMPEL en S. E. STUMPEL-RIENKS, Landelijke Milieukartering; een landschapsecologische kartering van het natuurlijk milieu in Nederland ten behoeve van de ruimtelijke planning op nationaal niveau. Studierapport Rijksplanologische Dienst no. 8. Staatsuitgeverij, \xe2\x80\x99s-Gravenhage, 1976 (verspreid juni 1977), 141 pag. + 4 bijlagen, \xc6\x92 35,\xe2\x80\x94 (Ook verschenen als Verhandeling 9 van het Rijksinstituut voor Natuurbeheer, Leersum).
    Repository Name: National Museum of Natural History, Netherlands
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  • 4
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    Juncus effusus L.f. pauciflorus (Michel ex Lej. & Court.) Th.J. Reichgelt, een prematuur bloeiende vorm van pitrus (1978)
    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 9 no. 2, pp. 32-34
    Details
    Publication Date: 2024-02-08
    Description: Small, locally dominant plants of Juncus effusus f. pauciflorus have been collected in the exceptionally warm and dry summer of 1976 on the dry bottom of a wide ditch in the Southwestern part of the country near Roosendaal (prov. of N.-Brabant). Earlier such forms were known in the Netherlands from four localities. All the summers of the years in which these forms had been found were characterised metereologically as \xe2\x80\x9e(very) hot\xe2\x80\x9d as well as \xe2\x80\x9e(very) dry\xe2\x80\x9d, which is very unusual in this country. The individual plants have normal terete stems, sometimes with young \xe2\x80\x98lateral\xe2\x80\x99 inflorescences, as well as small, filiform stems bearing apicallya few fruits and with the lower sheaths terminating in distinct linear blades; fruits of the latter are usually not retuse at the apex, and contain apparently normal seeds ( fig. 1). Ontogenetical research on the unusual dimorphism of this form is required.
    Repository Name: National Museum of Natural History, Netherlands
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  • 5
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    On the taxonomic status of Delphinus tropicalis van Bree, 1971 (Notes on Cetacea, Delphinoidea IX) (1978)
    In:  Beaufortia vol. 28 no. 342, pp. 1-8
    Details
    Publication Date: 2024-01-12
    Description: Three recently found skulls of Delphinus tropicalis are discussed and compared with other skulls of the same taxon. The occurrence of Delphinus delphis in the same area as Delphinus tropicalis makes it plausible that D. tropicalis is a distinct species and not a subspecies of D. delphis. A dolphin collected in the South China Sea, probably near Pontianak, by W. L. Abbott in 1907 also belongs to Delphinus tropicalis. The species therefore has a wider distribution than was originally believed.
    Repository Name: National Museum of Natural History, Netherlands
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  • 6
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    Age and growth in Phocoena phocoena Linnaeus, 1758 (Cetacea, Odontoceti) from the North Sea (1978)
    In:  Bijdragen tot de dierkunde vol. 48 no. 1, pp. 16-26
    Details
    Publication Date: 2024-01-12
    Description: Data and material are collected from 106 Harbour Porpoises (P. phocoena) from the southern part of the North Sea. All animals are accidentally caught or found stranded. The greatest length for males in the sample is 151 cm, for females 186 cm. For detailed analysis of body measurements, 30 males and 37 females are selected, while from 20 males and 34 females teeth are used for age analysis. The analysis of the body measurements shows sexual dimorphism in the anterior and posterior part of the back, in the flukes and flippers and in the position of the genital slit. The maximum number of dentinal layers found in the teeth is 12. Males attain sexual maturity after the deposition of 5 dentinal layers, females when 6 layers are formed, at a body length of about 135 cm and 150 cm, respectively. Some evidence is found that the population of P. phocoena from the North Sea has a lower growth rate than the population from Canadian waters. The gestation period is estimated to be eleven months, the peak of the birth period being in June. The animals are born at a length varying between 67 cm to 80 cm. Growth of the visceral organs is isogonic. The mean weight of the organs is greater in females than in males.
    Repository Name: National Museum of Natural History, Netherlands
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  • 7
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    The neotropical mailed catfishes of the genera Lamontichthys P. de Miranda Ribeiro, 1939 and Pterosturiosma n. gen., including the description of Lamontichthys stibaros n. sp. from Ecuador (Pisces, Siluriformes, Loricariidae) (1978)
    In:  Bijdragen tot de dierkunde vol. 48 no. 1, pp. 57-80
    Details
    Publication Date: 2024-01-12
    Description: Descriptions and illustrations are given of four species of mailed catfishes belonging to the subfamily Loricariinae, tribe Harttiini. Two species are assigned to Lamontichthys P. de Miranda Ribeiro, 1939: Lamontichthys filamentosus (La Monte, 1935) (type-species, of which Harttia filamentissima C. H. Eigenmann & Allen, 1942, is provisionally considered a junior synonym), based on a total of thirteen specimens, including all type-specimens, from Brazil, Bolivia, Peru, and Ecuador (all from tributaries of the Rio Amazonas system), and Lamontichthys stibaros n. sp., based on two specimens from Ecuador, sympatric with the former species.\nHarttia microps C. H. Eigenmann & Allen, 1942, is redescribed from three out of the five type-specimens, originating from Iquitos, Peru (Rio Amazonas system). It is designated as type-species of Pterosturisoma n. gen., which superficially resembles Lamontichthys.\nSturisoma brevirostre (C. H. Eigenmann & R. S. Eigenmann, 1889), type-species of Parasturisoma A. de Miranda Ribeiro, 1911 ( = Sturisoma Swainson, 1838), which was poorly described previously, is redescribed from its unique holotype, primarily to indicate the generic distinction from both Lamontichthys and Pterosturisoma, the species of which have been recently referred to Parasturisoma.
    Repository Name: National Museum of Natural History, Netherlands
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  • 8
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    Fysische en chemische bepalingen, topografie en vegetatie van zeven monsterpunten in infiltratiepannen en kwelplassen in het gebied van de duinwaterleiding van \'s-Gravenhage in 1974 en 1975 (1978)
    Details
    Publication Date: 2024-01-12
    Description: Bijlage 2, bij het doctoraalverslag van E.J. van Nieukerken
    Keywords: Meijendel ; Den Haag ; vegetatie
    Repository Name: National Museum of Natural History, Netherlands
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  • 9
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    De macrofauna van wateren in het met rivierwater ge\xc3\xafnfiltreerde duingebied Meijendel (1978)
    Details
    Publication Date: 2024-01-12
    Description: Verslag van een doctoraalonderwerp van 12 maanden bij de vakgroep Oecologie, Rijksuniversiteit Leiden, 1974-1977
    Keywords: Meijendel ; macrofauna
    Repository Name: National Museum of Natural History, Netherlands
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  • 10
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    [Rijksmuseum van Geologie en Mineralogie, 1878-1978 = The Rijks Museum for Geology and Mineralogy, 1878-1978 / P.C. Zwaan (editor)]: Rijksmuseum van Geologie en Mineralogie 1878 - 1978 : past, present, and future (1978)
    In:  Scripta Geologica vol. 48, pp. 37-96
    Details
    Publication Date: 2024-01-12
    Description: The Past 38 Period before 1751 38 1751-1820 39 1820-1878 43 1878-1922 52 1922-1955 57 1955-1961 61 1961-1972 63 The Present (from 1972 onwards) 66 The Future 68 University teaching 70 Other teaching activities 72 The status and position of RGM 72 Acknowledgements 76 Notes 77 References 85 Appendix I 88 Appendix II 91 On the first of November, 1978, the Rijksmuseum van Geologie en Mineralogie (National Museum of Geology and Mineralogy), commemorated the day upon which, one hundred years ago, the first step was set on its way to independence. This gives occasion to review its past, its present state, as well as to try and look into its future. It will be evident that when discussing the present state and the possible future development of the museum (unless stated otherwise) the opinion given is that of the present author.
    Repository Name: National Museum of Natural History, Netherlands
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