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  • 1
    Electronic Resource
    Electronic Resource
    A field survey of the bredding habits of Eretmodus cyanostictus, a biparental mouthbrooding cichlid in Lake Tanganyika (1999)
    Springer
    Environmental biology of fishes 55 (1999), S. 333-338 
    Details
    ISSN: 1573-5133
    Keywords: benefits of biparental care ; Eretmodini ; cichlid ; lunar synchronization ; sexual dimorphism ; biased sex ration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Oral incubation of young or ‘mouthbrooding’ reduces the selective advantages of care by two parents and thus biparental care is rare among ‘mouthbrooding’ fish. We surveyed the breeding biology of Eretmodus cyanostictus, a biparental mouthbrooder from Lake Tanganyika, to understand what factors maintain biparental care. We found larger males than females, a male-biased sex ration and indications that spawning is synchronized around the full moon. These preliminary findings suggest that the benefits of desertion for males are low; males may maximize their reproductive success by helping raise young while females regain reproductive condition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007580619528
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    Paper (German National Licenses)
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  • 2
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    Otolith chemistry reveals seamount fidelity in a deepwater fish (2017)
    Elsevier
    In:  Deep Sea Research Part I: Oceanographic Research Papers, 121 . pp. 183-189.
    Details
    Publication Date: 2020-09-14
    Description: There are thousands of seamounts (underwater mountains) throughout the world's deep oceans, many of which support diverse faunal communities and valuable fish stocks. Although seamounts are often geographically and bathymetrically isolated from one another, it is not clear how biologically isolated they are from one another. We analysed the chemical signature of the otoliths of a deepwater fish, the roundnose grenadier (Coryphaenoides rupestris) to test the null hypothesis that there is random exchange between individuals from a seamount and other adjacent areas. The fish were sampled on the Scottish west coast, from the Rosemary Bank seamount and two adjacent locations of similar depth, in the same year at roughly the same time of year. We used flow-injection inductively coupled plasma mass spectrometry to measure trace element concentrations from micro-milled portions of the otolith corresponding to adult and juvenile life history stages. The elemental signatures of the fish from the seamount were distinguishable from the fish from the two other areas during both the juvenile and adult life-history phase. We infer that once juveniles settle on the seamount they remain there for the rest of their lives. Evidence for population structure should be factored into exploitation strategies to prevent local depletion and is an important consideration with respect to Rosemary bank being included in a network of Marine Protected Areas around Scotland.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.dsr.2017.01.010
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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