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  • Benthic infauna  (1)
  • Demersal phase  (1)
  • Embryos  (1)
  • Subsurface sediment  (1)
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  • 1
    ISSN: 1573-5133
    Schlagwort(e): Burrowing fish ; Benthic infauna ; Reproductive behaviour ; Demersal phase
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Synopsis Adult Melanostigma atlanticum were observed living 15 to 32 cm deep within sediment box cores from 350 m depth in the Laurentian Trough of the Maritime Estuary of the St. Lawrence. The fish were found in fluid pockets or burrows of brown-coloured (oxygenated) silty clay within the anoxic zone of the sediment. In August 1983, four individuals (3 male and 1 female) were recovered from pockets located 15 and 32 cm below the sediment surface. All specimens were greater than 100 mm in length, had empty stomachs, and the female carried no eggs. In July 1985, 6 individuals (1 male and 5 females) were found in a head to tail arrangement within a single burrow at 18–20 cm depth. Three of the females carried eggs, while two appeared to have already released their eggs. A cluster of about 50 large eggs, some of which appeared to have been fertilized, was also found in the burrow. Most of the stomachs were empty, but one contained two copepods, another a proceroid cestode, and others contained between 4–22 parasitic hemiurid trematodes. These observations indicate that burrowing into bottom sediments is important in the reproductive behaviour of M. atlanticum.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    ISSN: 1573-5133
    Schlagwort(e): Burrowing fish ; Embryos ; Juveniles ; Reproduction ; Subsurface sediment ; Ontogenetic development ; Atlantic soft pout ; ‘Mollasse atlantique’
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Synopsis While adult Melanostigma atlanticum continue to be sporadically noted living within bottom sediments of the Laurentian Trough, the observation of late embryo/early juvenile stages has not previously been reported. The occurrence of 22 live specimens between 20–25 mm total length in the subsurface anoxic sediment in early May suggests that development of eggs and embryos may take place in such environments during the winter.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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