Recording and Assessing the Threat to Noble Crayfish from Invasive Cancers in the Harz District

• Country: Germany
• Summary: Recording and Assessing the Threat to Noble Crayfish from Invasive Cancers in the Harz District
• DET Ref No: 129135819
• Deadline: 02 Dec 2025
• Financier: Self Financed
• Purchaser Ownership: Government
• Tender Value: Refer Document
• Notice Type: Tender
• Document Ref. No.: 43.162-2025-01
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• Description:
• 1 Aim of the service The aim of the service is to record the noble crayfish (Astacus astacus) and the invasive cancer types Camber crayfish (Orconectes limosus), Marble crayfish (Procambarus fallax) and Signal crayfish (Pacifastacus leniusculus), taking into account and examining old evidence as well as the evaluation the conservation status of the noble crayfish. For this purpose, current examinations and surveys of cancer species as well as the habitat and impairment parameters required for the assessment must be carried out in the preselected waters using a standardized method. 2 Scope of Services 2.1 General Methodology, examination area and time frame The examination area for recording the cancer types includes the waters or water sections listed in Appendix 1.2, Table 1. Figure 1 in Appendix 1.1 shows the situation in the country. If possible, it should not be part of the defined study areas be deviated. The contractor must determine suitable study locations on site in the named study areas. A specific examination site with 10 cancer baskets must be set up for each examination area (Table 1) (see section 2.2.1). For setting up the sample sites for the The methodological specifications of the evaluation scheme of TROSCHEL 2006 (Appendix 1.3) apply to the noble crayfish, the survey of population, habitat and impairment parameters of the noble crayfish and the assessment. The information required in this scheme is to be provided on site in the form of an FFH field report log (Appendix 1.4; see also requirements from section 2.2.2). 2.2 Recording work including preparatory work 2.2.1 Selection of the specific area to be examined The service description is predominantly functional. The contractor obtains the official permits required for the recording as well independently obtain the consent of the respective water body owners and document this to the client. In the study areas, the contractor has identified specific study locations or Probestre...
• Documents:

 Tender Notice