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  • 1
    Electronic Resource
    Electronic Resource
    The fine structure of the chromatophores and other non-sensory components of the eye of the blue-eye, Pseudomugil signifer (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 19 (1981), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Aspects of the fine structure of the chromatophores and of other components of the eye of the blue-eye, Pseudomugil signifer, are presented. Comparisons are made with similar structures of the eye of the mosquitofish, Garnbusia affinis. The blue-eye has a well organized argentea but no tapetum. Two types of iridophores and melanophores are identified in the weal tract. The uveal tract also includes another presumed chromatophore, the lipopterinophore and an as yet unidentified cell type provisionally named weal polypodal cell. The blue iris of Pseudomugil is thought to be due to the mode of organization of the irideal type β iridophores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1981.tb05831.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The respiratory mechanisms of the dusky flathead, Platycephalus fuscus (Platycephalidae, Scorpaeniformes) (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 18 (1981), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The respiratory mechanisms of a shallow-water, marine and estuarine flathead, Platycephalus fuscus C. & V. are described. Morphological and behavioural adaptations enabling respiration while the fish is buried in fine, unconsolidated sediments are investigated and related to the ecology of the species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1981.tb03795.x
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  • 3
    Electronic Resource
    Electronic Resource
    Sound production in the cichlid Tilapia mossambica Peters (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 6 (1974), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Aquarium-bred adult and juvenile Tilapia mossambica Peters can produce sounds ofvarying frequency, duration and intensity. However, minor environmental disturbancesmay cause the fish to fall silent for long periods. The sounds produced by excited feedingfishes are different from those produced by territorial males and from those emitted by fryswimming in school formation. The frequency of the sounds recorded varied from about1–16 kHz; no data are available on frequencies lower than 1 kHz. The sound producingmechanism consists of a single ventral and two dorsal pharyngeals located in the buccalcavity and provided with numerous small teeth. These teeth have a specially modifieddistal surface area which is already evident in younger fish. Young Tilapia, including3-week old fry, are able to emit sounds as soon as a sufficient number of teeth havedeveloped in the pharyngeal region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1974.tb04551.x
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  • 4
    Electronic Resource
    Electronic Resource
    Development of colour patterns in relation to behaviour in Tilapia mossambica (Peters) (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 6 (1974), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The development of chromatophores and the formation of colour patterns in Tilapia mossambica are described. A number of colour patterns are associated with certain aspects of behaviour. Four different melanophore systems are involved in the colour pattern formation. There appear to be 14 patterns which, in various combinations, produce a series of colour patterns. Each of these may convey a different message to different species of Tilapia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1974.tb04519.x
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  • 5
    Electronic Resource
    Electronic Resource
    Colour change and visual cues in the sand flathead, Platycephalus arenarius (Ramsay and Ogilby) (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 18 (1981), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: This study investigates cryptic coloration and the phenomenon of colour change in the sand flathead, Platycephalus arenarius (Ramsay and Ogilby), a shallow-water marine species. The chromatophore configurations of the dorsal integument are described and the responses to a range of artificial backgrounds studied. Certain visual cues used by this species in colour change are deduced, and the existence of a linear relationship between the shade of the integument and that of the background is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1981.tb03804.x
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  • 6
    Electronic Resource
    Electronic Resource
    Melanogenesis in normal and phenylthiourea-treated eggs and larvae of Sarotherodon aureus (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 24 (1984), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The effects of phenylthiourea on the melanophores of eggs and larvae of Sarotherodon aureus were investigated macroscopically and ultrastructurally. Depending on the precise time of application of the drug, partial or total inhibition of melanogenesis of the premelano-somes was obtained, with total inhibition producing artificial albinos. Coincidentally, phenylthiourea also appeared to suppress somatic growth and development of the fry, presumably due to an additional inhibitory effect on the thyroid gland.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1984.tb04798.x
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of methallibure on gonad development and carotenoid content of the fins of Sarotherodon mossambicus (Tilapia mossambica) (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 12 (1978), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Juvenile Sarotherodon mossambicus were exposed to a daily dose of 1 or 2 p.p.m. of the antigonadotropic drug methallibure for a period of seven weeks. The control fish all showed well-developed gonads and a considerable concentration of astaxanthin in the dorsal fins. The dominant male showed a much higher astaxanthin value than the other fishes. Methallibure completely prevented gonad development. Nevertheless, some astaxanthin deposition did occur in the drug-treated fish.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1978.tb04163.x
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  • 8
    Electronic Resource
    Electronic Resource
    The development of a saccus vasculosus in Tilapia mossambica Peters and other cichlids (1970)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 2 (1970), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Observations are made on the development and the presence of a Saccus Vasculosus in Tilapia mossambica and other cichlids.In those cichlids that do not possess a saccus vasculosus the development of this organ is apparently suppressed in a very early stage of life.A saccus vasculosus is present in all those American and Indian cichlids that were investigated, but this organ was not found in cichlids indigenous to the African continent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1970.tb03282.x
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  • 9
    Electronic Resource
    Electronic Resource
    Scanning microscopy of surface structures of Tilapia mossambica (Peters) scales (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 6 (1974), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Scanning microscopic observations were made of the surface structures of isolated scales of Tilapia mossambica (Peters). The circuli were found to form numerous minute processes called scalar denticles, which may act to secure the position of the scale with reference to surrounding dermal tissues. The skin covering the lunula of the scale includes a number of pores which are thought to represent the terminal openings of dermal mucous cells. This part of the skin also shows peculiar epidermal surface patterns. These surface patterns may be indicative of areas subject to increased mechanical stress.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1974.tb04547.x
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  • 10
    Electronic Resource
    Electronic Resource
    Scanning microscopy of pharyngeal and oral teeth of the teleost Tilapia mossambica (Peters) (1976)
    Springer
    Hydrobiologia 48 (1976), S. 137-139 
    Details
    ISSN: 1573-5117
    Keywords: Tilapia ; Denture ; Sound production
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The pharyngeal and oral teeth of the fish Tilapia mossambica (Peters) were examined with a scanning microscope. It appeared that the dorsal pharyngeal teeth form a peculiar hooklike extension at the tip, whereas the ventral pharyngeal teeth tend to curve in a posterior direction. The two lateral flanges at the tip of the ventral teeth are probably the areas of contact with the dorsal teeth when the latter are pressed down during sound production or feeding. However, the oral teeth develop along a different line. A part from villiform teeth the upper and lower jaws also develop tricuspid and bicuspid oral teeth, with the bicuspids concentrated mainly along the outer edge of the jaw.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00040166
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