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  • 1
    Electronic Resource
    Electronic Resource
    Larval growth patterns in Cyprinus carpio and Clarias gariepinus with attention to the finfold (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 50 (1997), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: During the larval period, most teleost fishes undergo a dramatic change in body form. Most functional systems are incomplete at hatching. Rapid development of swimming, feeding and respiration systems are expected. In this study, growth patterns of morphological characteristics related to these three functions were studied in two species of Ostariophysian teleosts: African catfish Clarias gariepinus and common carp Cyprinus carpio. Special attention was paid to the larval finfold, which is a remarkably common feature of fish larvae. The results confirmed that larval growth shows different phases. Many morphological characters showed fast allometric growth in early larvae, followed by isometric growth after an inflexion point. In carp, all larval growth curves showed such inflexion points at a total length of about 7 mm while in Clarias such a coupling was not found. The inflexion points in carp occur at a stage during which the typical larval swimming style changes towards the adult swimming style.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1997.tb01657.x
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  • 2
    Electronic Resource
    Electronic Resource
    X-ray measurements of gill-arch movements in filter-feeding bream, Abramis brama (Cyprinidae) (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 36 (1990), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The technique of X-ray cinematography was used to study pharyngeal movements in Abramis brama (L.). The theoretical and practical problems in X-ray cinematography of feeding fish are discussed, as well as criteria for the selection of images suited for detailed measurements.Respiration and filter-feeding on Daphnia pulex (length c. 1 mm) show different gill arch movement patterns in bream. Slits between gill-arches are kept smaller during filter-feeding. In addition, during filter-feeding, this inter-arch distance decreases considerably in a posterior direction. The hypothesis that particle retention occurs on the slits formed between adjacent gillarches and their gill-rakers is not supported by the present results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1990.tb03518.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The energetics of feeding strikes in larval carp, Cyprinus carpio (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 29 (1986), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The prey intake of larval carp is described from high-speed (200–1250 frames s−1) films with synchronous lateral and ventral views. Even in first-feeding carp larvae, the operculars are functional in sealing effectively the opercular slit until the moment of prey intake, and the maxillaries close off the corners of the mouth, preventing leak flow. In reducing the distance between larva and prey during attack, the relative importance of sucking the prey towards the mouth and swimming forward is variable; overall they are about equally important. The volume and the velocity of the water sucked into the mouth cavity during prey uptake are calculated. The energy costs of suction, i.e., accelerating the water sucked into the mouth cavity, during prey intake are estimated from these values. The energy costs of suction and swimming are in the same order of magnitude. Together they form only a fraction of 1% of the energetic content of the prey, so considerations about energy expenditure seem unimportant in a strategy to optimize the prey attack. During searching, however, they will be important. Power requirements during attack may also be important.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1986.tb04953.x
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  • 4
    Electronic Resource
    Electronic Resource
    Dynamic morphology of fish larvae, structural implications of friction forces in swimming, feeding and ventilation (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 55 (1999), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Dynamic morphology is the study of the ontogenetic transformations of functional systems in growing organisms. This paper describes these processes in fish larvae as they grow into the juvenile stage. Details of form changes and growth at the level of the organism and its organs are given. Some mechanical functions, such as swimming, eating and ventilation/respiration, which are important for surviving the most vulnerable period of life, the larval period, are analysed and their demands on structures and constructions are correlated with changing forms, size dimensions and environmental factors. The size- and velocity-dependent influences of viscosity, as an important physical environmental factor, are the points of emphasis. The changing form of the swimming motion, form and task of the finfold at different places along the body, modes and requirements of aquatic feeding and respiration are reflected in the changing sizes and proportions of the developing larval body.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1999.tb01053.x
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Physiological compartmentation in gonadal tissue of the common carp (Cyprinus carpio L.) (1985)
    Springer
    Cell & tissue research 242 (1985), S. 75-81 
    Details
    ISSN: 1432-0878
    Keywords: Blood-gonad barrier ; Monoclonal antibodies ; Horseradish peroxidase ; Immunohistochemistry ; Teleost fish
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Physiological compartmentation in carp (Cyprinus carpio L.) gonads was investigated after intracardial injection of horseradish peroxidase (HRP) and two mouse anti-carp-sperm monoclonal antibodies. Immunohistochemistry revealed that a physiological barrier exists in carp testis for HRP and mouse IgG monoclonal antibody around the central lumina of the tubules in which the spermatozoa are located, but not around the cysts containing the precursor germ cells. The results with HRP were confirmed by electron microscopy. Mouse IgM monoclonal antibody did not penetrate the spermatogenic cysts. Probably because of its large size, it was almost exclusively located inside blood capillaries and only sparsely in the interstitial tissue. In the ovary, HRP was regularly distributed in the gonadal tissue, whereas the IgG antibody was predominantly localised on oogonia and early prophase oocytes. The results indicate that in contrast with the testis, no barrier around germ cells exists in the carp ovary.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00225565
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    Paper (German National Licenses)
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