Kerckhof, F.

Open Marine Archive

2001 WGITMO Report 24
ANNEX 3: NATIONAL REPORTS 
NATIONAL REPORT FOR BELGIUM 
1 LAWS AND REGULATIONS 
The Belgian law of 20 January 1999 on the protection of the marine environment in the marine areas under Belgian 
jurisdiction (MMM wet) published in the Belgian Official Journal (BOJ) on 12 March 1999, forbids the intentional 
introduction of non-indigenous species in the marine environment (art. 11 § 1). This is a provision mirroring those 
included in international instruments such as the Biodiversity Convention. 
The unintentional introduction of non-indigenous species via ballast water of ships can be penalised by royal decree 
(art. 11 § 2). Due to the specific and international character of the issue of non-indigenous species in ballast water of 
ships, however the new Belgian framework law did not specifically touch this issue, and this activity is to be regulated 
by an implementation decree. 
For the protection of the marine biota, measures can be taken (by royal decree and after scientific consultation) for the 
extermination of non-indigenous nuisance species (art. 11 § 3). The new law also prohibits the intentional introduction 
of genetically modified organisms into marine areas (art. 11 § 4). 
In the Flemish region, the introduction of non-indigenous species is prohibited, except with a licence, by the decree of 
21 April 1993 of the Flemish Executive (published in the BOJ on 31 June 1993). The Flemish Regional Government is 
preparing a further regulation. 
2 DELIBERATE INTRODUCTIONS AND TRANSFERS 
2.1 Finfish 
Reintroduction project of Atlantic salmon (Salmo salar) in the river Meuse: Salmon 2000 (Philippart, Ulg); restocking 
of turbot (Scopthalmus rhombus), offspring from fish from the French Atlantic coast, and sole (Solea solea). Apparently 
no other planned deliberate introductions. 
3 ACCIDENTAL INTRODUCTIONS AND TRANSFERS 
3.2 Invertebrates 
Spreading and establishment of several new species in recent years. Several introductions are now very abundant. 
Haliplanella lineata: Spuikom in Oostende 1998, first record for Belgium. 
Nemopsis bachei: 1996  1997 abundant in the harbour of Zeebrugge (Dumoulin, 1997) still present, also recorded 
some years earlier from the Netherlands. 
Ficopomatus enigmaticus: first recorded in 1952, this species is now again regularly recorded. 
Crassostrea gigas: although present earlier, this species became very abundant after 1995; it has been spawning 
regularly since that time, and settling occurs by the end of September. The species now forms dense populations in the 
harbours of Zeebrugge, Oostende, Nieuwpoort and Blankenberge. It is present on the groins, living between the 
mussels, and on offshore buoys. It has been introduced frequently by oyster farmers in earlier years from Japan and 
Canada but also from France, Portugal, the Mediterranean, etc., in the Spuikom at Oostende. However until the 1990s 
this species was never able to establish self-sustaining populations.  
Crepidula fornicata: present almost everywhere and very abundant, offshore as well as in littoral areas, in fully marine 
conditions as well as in brackish conditions, on groins, as fouling on buoys, ships, harbour installations, also benthic. A 
recent increase in the abundance has been observed along the Belgian coast. 
Corbula gibba: introduced after 1983 in the harbour of Zeebrugge. First records from Belgium in 1998 (Kerckhof, 
1998). Also recorded recently in 1996 from the harbour of Dunkerque (Pruvot et al. 2000). 
 2001 WGITMO Report 25
Ensis directus: first record from Belgium in 1987 (settled 1986). Now the most common bivalve on Belgian beaches; 
also recently recorded from the Spuikom in Oostende. 
Petricola pholadiformis: still common, but Barnea candida seems now to be the more abundant species. B. candida is 
also the more common species in Northern France, e.g., Boulonnais. 
Mytilopsis leucophaeata (=Congeria cochleata): present in the harbour of Antwerp, causing nuisance by the 
obstruction of water intake pipes of some chemical plants. 
Barnacles: several new species (Kerckhof and Cattrijsse, in print), e.g., Balanus amphitrite: established on places that 
are not artificially warmed, e.g., the harbours of Oostende and Nieuwpoort and on buoys off the Belgian coast. Several 
records on buoys off the Belgian coast from Megabalanus coccopoma and M. tintinnabulum, the former probably 
established in the southern North Sea. Also records on the buoys from Balanus reticulatus and B. variegatus. Elminius 
modestus is now by far the most common barnacle of the Belgian coast. 
Caprella mutica: (= C. macho = C. acanthogaster): first record in 1998. Present on several buoys marking the entrance 
to the harbour of Zeebrugge. Also recorded from the Marina of Zeebrugge, but not yet from other places.  
Hemimysis anomala: first record in Belgium in 1999 (Verslycke et al. 2000). 
Several first records of some Bugula (Bryozoa) species, e.g., Bugula stolonifera (established), Oostende, whole 
harbour; Bugula simplex, new record in 2000, Oostende, Mercator Marina, extending its range?; also in the 
Netherlands; Bugula neritina recorded once in 1999, Oostende, Mercator Marina (Kerckhof 2000; Kerckhof 2001; De 
Blauwe & Faasse in prep.). 
Tricellaria inopinata: range extension. First observations in Belgium in 2000 (Blankenberge, Marina and Oostende, 
Mercator Marina); also recorded from France and the Netherlands in 2000 (De Blauwe & Faasse in prep.). 
Callinectes sapidus: since 1995, after a period of approximately 10 years of no records, each year several catches along 
the coast of northern France and Belgium (North Sea and also the Scheldt estuary), mature animals, even females 
carrying eggs. Possibly a population in the Scheldt (Antwerpen?). 
Eriocheir sinensis: after a marked decline until the early 1990s, this species is again regularly recorded along the coast, 
in inland waters and the Scheldt. 
Rhithropanopeus harrisii: established in the Scheldt estuary (J. Maes pers. comm.). 
Hemigrapsus sp.: not yet recorded, although sought after. 
3.3 Algae 
Continuous spreading and establishment of some macroalgae. 
Undaria pinnatifida: recent range extension. Recorded from Calais (Northern France) in 1998, (it was not present there 
in 1997) and now very common (Leliaert et al., 2000); first record for Belgium in 2000 (Marina Zeebrugge) (Dumoulin 
& De Blauwe, 1999; De Blauwe, 2000), small population, still present in 2001. Not yet recorded elsewhere from the 
Belgian coast. Recorded from the Netherlands in 1999 (Stegenga, 1999). 
Sargassum muticum: recent establishment in Belgium. Known washed ashore on Belgian beaches since 1977. First time 
in situ records for the Belgian coast, from the harbour of Zeebrugge in 1999 (De Blauwe, 2000), not recorded there 
anymore after that date. Also present in the Spuikom in Oostende since 1999, probably already present there in 1998. 
Relation with oyster imports? 
Codium fragile subspecies tomentosoides: known washed ashore becoming more abundant the last years. In situ, 
forming dense populations during 19982000 in the Spuikom, Oostende. Some earlier records. Relation with oyster 
imports (Canada). Apparently not present any more in 2001 probably due to competition with Sargassum, growing on 
the same places. 
2001 WGITMO Report 26
Antithamnionella spirographidis: first accidental record in 1992, epiphytic on Polysiphonia fucoides on a groin in 
Oostende, not established then; established in the harbour of Zeebrugge (after 1983) and the Mercator Marina, 
Oostende; also present in northern France, e.g., the Marina at Calais. 
4 LIVE IMPORTS AND TRANSFERS 
In Belgium, there is a lot of (uncontrolled) import and export of a wide variety of marine and fresh water species, for 
research, human consumption, aquaculture and aquariums.  
Since 1996 an oyster farmer restarted farming and importing oysters in the Spuikom at Oostende. Japanese oysters 
Crassostrea gigas, were imported from Canada (British Columbia), and France; Hard-shell clams, Mercenaria 
mercenaria, from France(?); Manila clam, Tapes phillipinarum, from France(?); Ostrea edulis (UK, Canada). Apart 
from oysters and other well-known commercial species, he imported also several other species virtually without any 
control, e.g., Spisula polynyma and Cyrtodaria siliqua from Canada.  
At the nuclear power plant of Tihange, there is some aquaculture of warmwater fish: rainbow trout from California; 
African Catfish, Tilapia. 
A trader in Zeebrugge imports Homarus americanus from Canada. The species is also imported by the oyster farmer 
operating around the Spuikom at Oostende. 
Prof. Dr Volckaert (KUL) is worried about the impact (gene-pool interactions) on existing populations of imports of the 
same species from elsewhere (e.g., for restocking). 
7 MEETINGS, PROJECTS 
A shipping study entitled Study of the Potential Role of Transportation of Ships Ballast Water on the Geographical 
Extension of Blooms of Toxic Algae was carried out at the Université Libre de Bruxelles. The main results of the 
study were that risks do exist concerning the introduction of non-indigenous toxin-producing phytoplankton species into 
European waters with ballast water or sediment discharges. It is recommended to implement ballast water management 
guidelines at an international level (Vanden Boeck 1995, G. Houvenaghel, Université Libre de Bruxelles, LOBA CP 
160/19, Avenue F.D., Roosevelt 50, B-1050 Brussels, Belgium pers. comm.). 
8 BIBLIOGRAPHY 
See Annex 10. 
Submitted by: Francis Kerckhof 
NATIONAL REPORT FOR CANADA 
1 LAWS AND REGULATIONS 
Canada is nearing completion on its National Code on Introductions and Transfers. The purpose of the code is to 
establish scientific criteria for the intentional introduction of live aquatic organisms while minimising the risks inherent 
in such transfers (i.e. undesirable ecological changes to native ecosystems, undesirable genetic alterations in native 
stocks, transfer of disease agents). The Code will apply to transfers of aquatic organisms into fish habitat and fish 
rearing facilities, but not to live food fish, baitfish or aquarium fish or plants. The enabling legislation is Section 55 & 
56 of the Fishery (General) Regulations which applies in most provinces of Canada in both marine and fresh waters. 
We expect the Code to be sent to the Canadian Council of Fisheries and Aquaculture Ministers for signature in early 
2001. There will then be an 18-month implementation period at the end of which there will be a review and 
recommendations for changes, if required. 
In addition, Canada is proposing a new National Aquatic Animal Health Program for which a consultation document 
has been prepared. 
Genetically Modified Organisms, including aquatic species, are currently regulated under the Canadian Environmental 
Protection Act. New regulation is being drafted under the Fisheries Act to regulate activities in relation to aquatic 


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