Počet záznamů: 1

Age structure of annual Nothobranchius fishes in Mozambique: is there a hatching synchrony?

  1. 1.
    0358428 - UBO-W 2012 RIV GB eng J - Článek v odborném periodiku
    Polačik, Matej - Donner, M. T. - Reichard, Martin
    Age structure of annual Nothobranchius fishes in Mozambique: is there a hatching synchrony?.
    Journal of Fish Biology. Roč. 78, č. 3 (2011), s. 796-809 ISSN 0022-1112
    Grant CEP: GA ČR GA206/09/0815
    Výzkumný záměr: CEZ:AV0Z60930519
    Klíčová slova: age validation * ecology * killifishes * south-east Africa * temporary pools
    Kód oboru RIV: EG - Zoologie
    Impakt faktor: 1.685, rok: 2011

    In this study, the age structures of populations of African annual Nothobranchius fishes are examined for the first time. Daily increments in sagittal otoliths of N. furzeri, N. kadleci, N. orthonotus and N. rachovii were used for age determination. Four hypotheses were tested: 1) timing of hatching is consistent with the calendar onset of the rainy season, 2) hatching is synchronized within a population in a pool, 3) there is a difference in hatching date between geographical regions differing in mean total annual precipitation, and 4) sympatric Nothobranchius species hatch at the same time. The results show that daily increment analysis represents an applicable method for age determination in Nothobranchius spp. Timing of hatching was not consistent with the calendar onset of the rainy season. Hatching dates were relatively uniform in some populations, whilst there was considerable variability in others.
    Trvalý link: http://hdl.handle.net/11104/0196480