[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina
Historical population size of the harbour seal, Phoca vitulina, in the Delta area, SW Netherlands
Reijnders, P.J.H. (1994). Historical population size of the harbour seal, Phoca vitulina, in the Delta area, SW Netherlands. Hydrobiologia 282: 557-560. https://dx.doi.org/10.1007/BF00024655
In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, meer
Is gerelateerd aan:
Reijnders, P.J.H. (1994). Historical population size of the harbour seal, Phoca vitulina, in the Delta area, SW Netherlands, in: Nienhuis, P.H. et al. The Oosterschelde Estuary (The Netherlands): A case-study of a changing ecosystem. Developments in Hydrobiology, 97: pp. 557-560. https://dx.doi.org/10.1007/978-94-011-1174-4_40, meer
Peer reviewed article  
Beschikbaar in  Auteur 
Trefwoorden
    Phocidae Gray, 1821 [WoRMS]
    Marien/Kust; Brak water
Auteur  Top 
  • Reijnders, P.J.H., meer
Abstract
    Seals in the Dutch Delta area have been subject to hunting pressure for centuries, promoted by a bounty system which generated a sort of hunting statistics. Hunting mortality is used to estimate historical population size. Based on ranges for most likely net recruitment rates, corresponding population trajectories are back calculated from an assessed population size of 350 seals in 1960. It is concluded that the size of the harbour seal population in the Delta area in 1900 will have been close to 11 500 animals. Significant loss of habitat has occurred due to closing off parts of the larger estuaries and the enlargement of the entrance to the harbour of Rotterdam in the 1960s and early 1970s. It is estimated that about 4000 harbour seals could inhabit the remaining Delta area under tidal influence. This outcome, based on retrospective population analysis, will be an important reference in defining management objectives for the recovery of the harbour seal population in the Delta area, which amounted to 18 seals in 1992.
Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteur 
IMIS is ontwikkeld en wordt gehost door het VLIZ.