Associated fauna and effects of epibiotic barnacles on the relative growth and reproductive indices of Stramonita haemastoma (Gastropoda: Muricidae)


  • Tahani El Ayari University of Carthage, Faculty of Sciences of Bizerta, Laboratory of Environment Bio-monitoring
  • Youssef Lahbib University of Carthage, Faculty of Sciences of Bizerta, Laboratory of Environment Bio-monitoring
  • Najoua Trigui El Menif University of Carthage, Faculty of Sciences of Bizerta, Laboratory of Environment Bio-monitoring



Stramonita haemastoma, biofouling, reproductive indices, relative growth, Bizerta Channel


To better understand the impacts of biofouling on the biological processes of the basibiont, the effects of epibiotic barnacles on the relative growth and reproductive indices of Stramonita haemastoma (Linnaeus, 1767) were assessed. A total of 1035 specimens were collected monthly for one year from Bizerta Channel (northern Tunisia). Endobiotic species comprised the lithophagous bivalves Lithophaga aristata and Rocellaria dubia of different sizes, communicating with the outside through tiny perforations. Intra-shell tunnels and galleries also sheltered annelids and sipunculids. Epibiotic species comprised algae and highly diversified invertebrates represented by crustaceans, polychaetes, molluscs, echinoderms, ascidians, sponges, bryozoans and sipunculids, with barnacles being the most common group. Comparison of growth features between non-fouled and fouled S. haemastoma revealed higher growth in non-fouled specimens. Differences in reproductive condition indices were detected in few months, being mostly higher in non-fouled snails, but showed no asynchrony in the spawning period for either fouled or non-fouled gastropods hosts.


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How to Cite

El Ayari T, Lahbib Y, Trigui El Menif N. Associated fauna and effects of epibiotic barnacles on the relative growth and reproductive indices of Stramonita haemastoma (Gastropoda: Muricidae). scimar [Internet]. 2015Jun.30 [cited 2022Nov.29];79(2):222-3. Available from: