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  • 1
    Monograph available for loan
    Monograph available for loan
    Kurzes Lehrbuch der Zoologie (1978)
    Jena : Fischer
    Details Availability
    Call number: G 7328
    Type of Medium: Monograph available for loan
    Pages: IX, 532 S. : Ill., graph. Darst.
    Edition: 3., völlig neu bearb. Aufl.
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Blood proteins in bipolar Priapulida (1992)
    Springer
    Polar biology 12 (1992), S. 667-672 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Molecular weights are provided for 44 blood serum proteins from four species of Priapulida: 21 peptides in Priapulus caudatus and P. tuberculatospinosus, 19 in Priapulopsis bicaudatus, and 24 in P. australis. One (exceptionally two) proteins predominate in the investigated sera. While electrophoretic patterns are variable within species, phenetic trees constructed on the basis of Czekanowski's distances of peptide pattern resemblance match the taxonomic hierarchy of priapulids. This shows that electrophoretic profiles of denatured serum peptides have a phylogenetic basis, in spite of considerable nongenetic diversity which limits phylogenetic interpretations of the present data set. One may tentatively conclude that molecular differentiation of bipolar priapulids is more extensive than morphological differences, at least in the genus Priapulus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00236990
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  • 3
    Electronic Resource
    Electronic Resource
    Allozymes characterize sibling species of bipolar Priapulida (Priapulus, Priapulopsis) (1996)
    Springer
    Polar biology 16 (1996), S. 521-526 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Electrophoretic polymorphism of glucose-phosphate isomerase (Gpi * ) and phosphoglucomutase (Pgm * ) polymorphisms were assayed in the bipolar-disjunct species pairs Priapulus caudatus/P. tuberculatospinosus and Priapulopsis bicaudatus/Priapulopsis australis (phylum Priapulida). Numbers of genotypes from Gpi * alleles and 14 Pgm * alleles generally did not show deviations from Hardy-Weinberg expectations in composite populations sampled over geographic distances up to 500 km linearly measured. This genetic pattern suggests efficient population cohesion in a phylum where pelagic larvae have not been observed. Sibling species in genera Priapulus or Priapulopsis from northern and southern polar seas did not share identical allozyme alleles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003000050084
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  • 4
    Electronic Resource
    Electronic Resource
    Species-specific reaction of liver ultrastructure in zebrafish (Brachydanio rerio) and trout (Salmo gairdneri) after prolonged exposure to 4-chloroaniline (1990)
    Springer
    Archives of environmental contamination and toxicology 19 (1990), S. 405-418 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract The morphological alterations of hepatocytes of female zebrafish,Brachydanio rerio, and fingerling rainbow trout,Salmo gairdneri, following prolonged exposure to 0.04, 0.2 and 1 mg/L of 4-chloroaniline were investigated by means of light and electron microscopy. Changes in peroxisomes were visualized by cytochemical demonstration of catalase activity after incubation in the alkaline diaminobenzidine medium. The amount of storage products was illustrated by the silver impregnation technique. In a dose-dependent manner, the reaction of female zebrafish liver is characterized by a disturbance of hepatocytic compartmentation, progressive fenestration and fractionation of the rough endoplasmic reticulum (RER), a decrease in the number of peroxisomes and catalase activity, stratified inclusions in mitochondria, and an augmentation of lysosomes and myelinated bodies. Trout hepatocytes display nuclear inclusions, fractionation and vesiculation of the RER, and an increase in mitochondria, but a decrease of peroxisomes and catalase activity. Whereas glycogen stores are exhausted at 1 mg/L 4-chloroaniline, lipid deposits are amplified. An elevated rate of hepatocytic mitosis as well as the occurrence of glycogen-condensing cells probably derived from hepatocytes indicate the induction of proliferative processes in trout liver. Evaluation and comparison of results with earlier reports suggest that despite the unspecificity of some alterations the combination of pathological symptoms yields a syndrome specific of the species and the substance studied. As a consequence, histological and cytological investigations are recommended as a routine supplement in an integrated test schedule for the assessment of sublethal effects of pollutants in the aquatic environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01054986
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  • 5
    Electronic Resource
    Electronic Resource
    Glycosaminoglycans and fibrillar collagen in priapulida: a histo- and cytochemical study (1992)
    Springer
    Histochemistry and cell biology 98 (1992), S. 389-397 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The distribution of glycosaminoglycans and fibrillar collagen was studied in various tissues of priapulids, which represent an ancient group of mFine metazoa. Sulphated glycosaminoglycans, as demonstrated at the electron microscopical level by Cupromeronic blue, were predominantly found in the cuticle, in basement membranes and also in the narrow connective tissue space below epidermis and anterior intestine. On the basis of their morphology the Cupromeronic blue precipitates could be divided into several groups. Fibrillar collagen occurred in the connective tissue under the epidermis and the epithelium of the anterior intestine. The spatial interrelationship between fibrillar collagen and glycosaminoglycans lacked with some exceptions, the high regularity found in connective tissues of other invertebrates and of vertebrates. This might be related to the special skeletal system of priapulids, consisting mainly of a strong extracellular cuticle and the turgor of the fluid-filled body cavity. In such a system the usual supportive structures seem to be of less functional significance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00271075
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  • 6
    Electronic Resource
    Electronic Resource
    The impact of lead on the assimilation efficiency of laboratory-held Diplopoda (Arthropoda) preconditioned in different environmental situations (1992)
    Springer
    Oecologia 90 (1992), S. 113-119 
    Details
    ISSN: 1432-1939
    Keywords: Diplopoda ; Heavy metals ; Lead ; Assimilation efficiency ; Precondition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In five diplopod species from three families collected from locations with different soil metal contents, the following parameters were examined: the litter mass (and energy) ingested per day, the mass (and energy) assimilation rates, and the litter mass (and energy) assimilated per day, when the diplopods were fed (1) uncontaminated and (2) artificially lead-enriched leaf litter. These parameters were compared between species and between animals from different sites. The mass and energy assimilation efficiencies depend on (1) the size of the species and (2) the collection site of the animals. Relative mass (and in three of the species examined also energy) assimilation was highest in those animals collected from the less contaminated sites. With artificial diets, specimens from a site with soil contaminated by heavy metals showed greater assimilation of both mass and energy than originally unaffected specimens. One species (Glomeris conspersa) was able to compensate for the low assimilation rate by increased consumption, and thus guarantee a sufficient energy supply. One of the other species (Polydesmus denticulatus), however, did not show this compensation. Animals of this species from less contaminated sites showed a very low absolute energy assimilation rate and high mortality under lead treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00317816
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  • 7
    Electronic Resource
    Electronic Resource
    Allozymes characterize sibling species of bipolar Priapulida (Priapulus, Priapulopsis) (1996)
    Springer
    Polar biology 16 (1996), S. 521-526 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Electrophoretic polymorphism of glucosephosphate isomerase (Gpi*) and phosphoglucomutase (Pgm *) polymorphisms were assayed in the bipolardisjunct species pairsPriapulus caudatus/P. tuberculatospinosus andPriapulopsis bicaudatus/Priapulopsis australis (phylum Priapulida). Numbers of genotypes fromGpi * alleles and 14Pgm * alleles generally did not show deviations from Hardy-Weinberg expectations in composite populations sampled over geographic distances up to 500 km linearly measured. This genetic pattern suggests efficient population cohesion in a phylum where pelagic larvae have not been observed. Sibling species in generaPriapulus orPriapulopsis from northern and southern polar seas did not share identical allozyme alleles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02329072
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  • 8
    Electronic Resource
    Electronic Resource
    Microscopic anatomy, functional morphology, and ultrastructure of the stomach of Euphausia superba Dana (Crustacea, Euphausiacea) (1991)
    Springer
    Polar biology 11 (1991), S. 203-211 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Microscopic anatomy, functional morphology, and ultrastructure of the stomach of the antarctic krill Euphausia superba Dana were investigated by means of serial sections, scanning and transmission electron microscopy, and video technique. A separation of the stomach into an anterior part, called cardia, and a posterior part, called pylorus, became evident. Protrusions of the stomach into the midgut form the third region, called the funnel. The interior of the cardia is dominated by the two lateralia, originating from the side walls of the stomach. At their undersurface, they bear the primary filter. It separates the dorsal food channel from the ventral filtration channel, which is divided into two channels by a ventromedian ridge, the anteromedianum. Within the pylorus, the inferolateralia act in sealing the food channel from the filtration channel. In contrast to many other Malacostraca, the inferomedianum bears no secondary filter. During live observations, the stomach of Euphausia superba shows distinct pumping phases. A comparison of the structure of the stomach with data obtained from other Crustacea will lead to a better understanding about the relationships between the Malacostraca.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00240209
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  • 9
    Electronic Resource
    Electronic Resource
    Der Einfluß der Ernährung auf die Ultrastruktur der großen Zellen in den Mitteldarmdrüsen terrestrischer Isopoda (Armadillidium vulgare, Porcellio scaber) (1982)
    Springer
    Zoomorphology 100 (1982), S. 131-142 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Im Verlauf von 10wöchigem Nahrungsentzug unterliegen die großen Zellen der Mitteldarmdrüsen von Armadillidium vulgare und Porcellio scaber ultrastrukturellen Veränderungen, die denen entsprechen, welche von Ligia oceanica beschrieben wurden. Wiederfütterung mit verschiedenem Futter nach 6wöchigem Nahrungsentzug hat sehr verschiedene ultrastrukturelle Veränderungen zur Folge: Die dominierenden Merkmale sind Glykogen-Felder nach Saccharose-Gabe, elektronendichte Grana und große Vakuolen nach Protein, Lipideinschlüsse nach Butter und Fettkörper von Käferlarven sowie Sambucus-Blättern, Heterolysosomen nach Buchenlaub und Douglasien-Nadeln und elektronendichte Grana nach Bakterien (z.B. Bacillus subtilis). Das vielfältigste Bild zeigen die Zellen der Tiere, welche künstliches Nährmedium aufgenommen hatten.
    Notes: Summary Over a 10-week period of food deprivation the large epithelial cells of the hepatopancreas of Armadillidium vulgare and Porcellio scaber undergo ultrastructural changes that correspond to the conditions described previously from Ligia oceanica. Refeeding with different diets after a starvation period of 6 weeks results in very different ultrastructural aspects of the large epithelial cells. The dominant features are as follows: glycogen deposits (after a sucrose diet), electron dense granules and large vacuoles (protein diet), lipid droplets (butter, fat body of beetle larvae, litter of Sambucus), heterolysosomes (litter of Fagus, needles of Pseudotsuga), and electron dense granules (bacteria, e.g. Bacillus subtilis). The most diversified ultrastructure was obtained 2 days after refeeding with an artificial diet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310359
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  • 10
    Electronic Resource
    Electronic Resource
    Fine structure of the coelomic epithelium of Sagitta elegans (Chaetognatha) (1982)
    Springer
    Zoomorphology 100 (1982), S. 217-222 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The coelomic space in the trunk of the arrow worm Sagitta elegans is lined by a thin epithelium, which may be termed coelomic epithelium. The visceral part of this epithelium is composed of flat cells characterized by thin and thick myofilaments, which constitute the circular musculature of the gut. In addition mitochondria, rough ER, and smooth walled cisterns, as well as vesicular and granular inclusions occur; the apical and basal plasma membranes exhibit no particular specializations. The parietal epithelium is exceedingly thin and covers the muscle cells of the body wall. In the lateral fields columnar ciliated cells are to be found which are rich in rough ER cisterns and which apparently are also coelomic epithelial cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00311974
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