Biological Invasions

, Volume 8, Issue 1, pp 3–11 | Cite as

Global Documentation of Fish Introductions: the Growing Crisis and Recommendations for Action

  • Christine Marie V. Casal


Fish provides 15% of the total animal protein in human diets. It is also the primary source of livelihood for 35 million people (30 M in Asia and 2.6 M in Africa). The increase in global population and demand for fish protein cannot be met by capture fisheries alone. Governments are turning towards aquaculture as the source of fish protein. However, it has also led to the introduction and establishment of non-native species in local ecosystems through their escapement from aquaculture facilities to the wild. In freshwater ecosystems with relatively high endemism, this has become a significant problem. Documenting the international movement of fish is one way of providing a general view of the magnitude of these movements and the existing and potential threat faced by ecosystems due to species invasiveness. Information, however, is limited and scattered in different journals and agency/project reports. Several agencies, both local and international, have databases that provide information on invasive species (terrestrial and aquatic, local, regional or international in scope). The critical challenge is for consolidation, common access through data sharing and development of risk assessment and management tools. This is proposed through the use of Internet technology, sharing of databases or having a gateway or portal to which all introduced and invasive fish species related databases link. The fusion of these information sources will allow access to updated and reliable information. The experience of the WorldFish Center in documenting these phenomena through developing the FishBase information system and global partnerships is presented with recommendations for harmonizing approaches.


aquaculture species aquatic invasive species exotic species global database information system 


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  1. Bartley, DM, Casal, CMV 1998Impacts of introductions on the conservation and sustainable use of aquatic biodiversityFAO Aquaculture Newsletter201520Google Scholar
  2. Bleher, H 1994LanaoAqua geographia10630Google Scholar
  3. Casal, CMV, Bartley, D 2000The Introductions tableFroese, RPauly, D eds. FishBase 2000: Concepts, Design and Data SourcesICLARMLos Baños, Laguna, Philippines106112344 ppGoogle Scholar
  4. CIESM Atlas of Exotic Species in the Mediterranean (2003) Accessed 30 May 2003Google Scholar
  5. Database of Introduced Aquatic Species (2003) ( http://www. Accessed 30 May 2003
  6. Database on Alien Species in the Baltic Sea (2003) ( Accessed 30 May 2003
  7. Enserink, M 1999Biological invaders sweep inScience28518341836CrossRefGoogle Scholar
  8. FAO (1996) Precautionary approach to capture fisheries and species introductions. Elaborated by the Technical Consultation on the Precautionary Approach to Capture Fisheries (Including Species Introductions). Lysekil, Sweden, 6–13 June 1995. FAO Technical Guidelines for Responsible Fisheries. No. 2. Rome, FAO, 54 ppGoogle Scholar
  9. FAO (2002) The State of World Fisheries and Aquaculture. Rome. ( htm ). Accessed 30 May 2003
  10. FishBase (2003) ( Accessed 30 May 2003
  11. FISHSTAT (2003) ( Accessed 30 May 2003Google Scholar
  12. Foot T (2000) Guinness Book of World Records 2001. Guinness World Records Ltd, 284 ppGoogle Scholar
  13. Froese, R, FishBase, Pauly D 2000FishBase 2000: Concepts, Design and Data SourcesICLARMLos Baños, Laguna344 ppGoogle Scholar
  14. Global Invasive Species Database (2003) ( Accessed 30 May 2003Google Scholar
  15. ICES1995ICES Code of Practice on the Introductions and Transfers of Marine Organisms. International Council for the Exploration of the SeaCopenhagenDenmarkGoogle Scholar
  16. Kolar, CS, Lodge, DM 2002Ecological predictions and risk assessment for alien species in North AmericaScience29812331236PubMedCrossRefGoogle Scholar
  17. Lever, C 1996Naturalized Fishes of the WorldThe Bath Press BathGreat Britain40889Google Scholar
  18. Maguilas A (1999) Tilapia crowding out other fish. The Manila Times (June 16, 1999): 14Google Scholar
  19. Non indigenous species database (2003) ( gov/). Accessed 30 May 2003Google Scholar
  20. Pullin RSV, Palomares ML, Casal CMV, Dey MM and Pauly D (1997) Environmental impacts of tilapias. In: Fitzsimmons K (ed) Tilapia Aquaculture. Proceedings from the Fourth International Symposium on Tilapia in Aquaculture, pp 554–570. Vol 2. Northeast Regional Agricultural Engineering Service (NRAES) Cooperative Extension, Ithaca, New York, 808 ppGoogle Scholar
  21. Vitousek, PM, Mooney, HA, Lubchenco, J, Melillo, JM 1997Human domination of Earth’s ecosystemsScience277494499CrossRefGoogle Scholar
  22. Welcomme, RL 1988International Introductions of Inland Aquatic Species. FAO Fisheries Technical Paper No. 294.Food and Agriculture Organization of the United NationsRome318 ppGoogle Scholar
  23. Yamamoto, MN, Tagawa, AW 2000Hawaii’s Native and Exotic Freshwater AnimalsMutual PublishingHonolulu, Hawaii200Google Scholar

Copyright information

© Springer 2006

Authors and Affiliations

  • Christine Marie V. Casal
    • 1
  1. 1.WorldFish Center, Philippine OfficeIRRI CollegeLos BañosPhilippines

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