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  • 1
    Electronic Resource
    Electronic Resource
    Physical factors determining spawning site selection in a Central American hole nester, Cichlasoma nigrofasciatum (1991)
    Springer
    Environmental biology of fishes 31 (1991), S. 203-206 
    Details
    ISSN: 1573-5133
    Keywords: Cichlidae ; Behaviour ; Cavity spawner ; Convict cichlid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Most Central American cichlids spawn in caves. There has been considerable work documenting where cichlids lay their eggs, and how this may be beneficial to the offspring. However, it has yet to be determined which physical factors of a spawning site influence choice. This study examines the importance of light intensity, potential position of eggs, and number of entrances on spawning site selection in the convict cichlid, Cichlasoma nigrofasciatum. The results suggest that cave light intensity and entrance number determine spawning site selection in this species. Both factors are important in concealing the brood and offering it maximum protection from predators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00001021
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Past reproductive effort affects parental behaviour in a cichlid fish, Cichlasoma nigrofasciatum: a comparison of inexperienced and experienced breeders with normal and experimentally reduced broods (1995)
    Springer
    Behavioral ecology and sociobiology 36 (1995), S. 193-199 
    Details
    ISSN: 1432-0762
    Keywords: Parental investment ; Behaviour ; Past effort ; Cichlidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Defensive and parental care behaviour of convict cichlids that differed in past effort was compared. Before testing, some fish were bred three times while others were not bred. Age was held constant; all individuals in this study were approximately 20 months old (±2 months) at test time. Furthermore, half of the pairs in this study had their broods experimentally reduced by 50%. Results indicated that past effort across breeding attempts affects investment in the current brood. Experienced pairs were more aggressive toward a model predator than inexperienced parents. However, no major differences were observed in depreciable care (i.e. fanning). Contrary to previous studies, brood size had minor effects on parental care. This discrepancy could be due to the age of the parents; individuals in this study were significantly older than fish tested in previous studies. The results support parental investment theory and suggest that past effort is not only important within breeding episodes but also within an animal's lifetime.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00177796
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Past reproductive effort affects parental behaviour in a cichlid fish, Cichlasoma nigrofasciatum: a comparison of inexperienced and experienced breeders with normal and experimentally reduced broods (1995)
    Springer
    Behavioral ecology and sociobiology 36 (1995), S. 193-199 
    Details
    ISSN: 1432-0762
    Keywords: Key words Parental investment ; Behaviour ; Past effort ; Cichlidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Defensive and parental care behaviour of convict cichlids that differed in past effort was compared. Before testing, some fish were bred three times while others were not bred. Age was held constant; all individuals in this study were approximately 20 months old (±2 months) at test time. Furthermore, half of the pairs in this study had their broods experimentally reduced by 50%. Results indicated that past effort across breeding attempts affects investment in the current brood. Experienced pairs were more aggressive toward a model predator than inexperienced parents. However, no major differences were observed in depreciable care (i.e. fanning). Contrary to previous studies, brood size had minor effects on parental care. This discrepancy could be due to the age of the parents; individuals in this study were significantly older than fish tested in previous studies. The results support parental investment theory and suggest that past effort is not only important within breeding episodes but also within an animal’s lifetime.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002650050140
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    Paper (German National Licenses)
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