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Behavioural responses of the mangrove fiddler crabs (Uca annulipes and U. inversa) to urban sewage loadings: Results of a mesocosm approach
Bartolini, F.; Penha-Lopez, G.; Limbu, S.; Paula, J.; Cannicci, S. (2009). Behavioural responses of the mangrove fiddler crabs (Uca annulipes and U. inversa) to urban sewage loadings: Results of a mesocosm approach. Mar. Pollut. Bull. 58(12): 1860-1867. https://dx.doi.org/10.1016/j.marpolbul.2009.07.019
In: Marine Pollution Bulletin. Macmillan: London. ISSN 0025-326X; e-ISSN 1879-3363, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Behaviour > Reproductive behaviour
    ISW, Tanzania, Dar es Salaam
    Mangroves
    Pollution > Sediment pollution
    Pollution > Water pollution
    Wastes > Sewage
    Decapoda [WoRMS]; Uca (Austruca) annulipes (H. Milne Edwards, 1837) [WoRMS]
    Dar es Salaam [Marine Regions]
    Marien/Kust
Author keywords
    Sewage; East Africa; Mangrove; Fiddler crab; Behaviour; Ecosystemengineer
Auteurs  Top 
  • Bartolini, F.
  • Penha-Lopez, G.
  • Limbu, S.
  • Paula, J.
  • Cannicci, S.
Abstract
    The study aimed at investigating the effects of sewage loadings on the behaviour of two fiddler crabs species maintained in a system of experimental mesocosms, built in a mangrove area in Tanzania and inundated with different seawater/sewage mixtures. Our results show that sewage loads led to a modification of the overall activity budget of the crab community as a result of increased hypertrophic conditions (high COD, increased chlorophyll-a concentrations). During their activity period, crabs inside contaminated mesocosms seemed to satisfy their feeding demand faster than those of the control cells, spending a significant longer time in other activities like courtship and territorial defence. Apart from being a good biological indication of ecosystem eutrophication, such a reduced foraging activity by fiddler crabs also depresses their sediment bioturbation activity, important factor for the health of mangrove systems, suggesting practical implications regarding the efficiency of mangrove-based wetlands for treatment of domestic sewage.
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