Article 17 web tool

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: Methodik zur Ermittlung der Populationsgröße in EU-Einheit: Wanderfische - 1. Ermittlung der besiedelten Fließgewässerabschnitte
2. Verschneidung mit dem 1x1km-Raster
3. Ermittlung der besetzten grids1x1 ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: N/A ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: Diversos estudios constatan el aumento de las poblaciones de lamprea en la última década, tanto en Europa como en el Norte de España (Silva et al., 2014, 2016). ||
->HabInfo: El hábitat ha sufrido un grave deterioro debido principalmente a la construcción de presas e infraestructuras hidráulicas transversales en la mayoría de los ríos del Norte y Noroeste peninsular, donde han supuesto una reducción de hasta el 80% del hábitat disponible para la lamprea marina (Araújo et al., 2016). En la última década, si bien el hábitat ha mejorado en regiones como Navarra debido a las acciones de derribo de presas y azudes obsoletos, el hábitat disponible en la región Atlántica se ha mantenido estable en la mayoría de los ríos. ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: N/A ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: The range was calculated by creating envelopes around the distribution grids for rivers where sea lamprey occurred. As sea lamprey migrate from the sea to spawning grounds in freshwater, the envelopes extend from the mouths of rivers to the most upstream locations where they were recorded.
With the exception of a small number of additional records for P. marinus in the current reporting period, the short-term trend for range was assessed as stable. Although the trend is determined from data between 2009 and 2018 the trend is assumed to hold for the default trend period.
There was an increase in the estimated surface area for sea lamprey range in the current reporting period. This is the result of a more intensive sampling programme in the current monitoring cycle and does not represent a range expansion for this species.
In several sea lamprey rivers (e.g. the Mulkear, Feale, Fergus and Barrow) major barriers to migration occur at the upstream end of the tidal freshwater. The FRR was estimated to be much greater than the current range to include up to 75% of the main stem channel in occupied rivers where barriers occur. While this is an arbitrary value, it is consistent with findings from the Moy and Laune (Killarney National Park) SACs where no barriers to passage occur and where sea lamprey adults have been recorded a long distance upstream of the tidal limit. Such a length of channel would give adequate access to spawning and nursery habitat in addition to enabling access to major tributaries. ||
->Population: As few records were available for larval P. marinus, the population size estimate (Field 6.2) was based on data for adult sea lamprey (redd counts and direct observations of adults). Data were obtained from float-over and walk-over surveys of the main channels of 11 rivers (including 10 SAC rivers). Data were also provided from annual redd counts at known spawning locations on the main channels of 9 rivers. Ancillary information was available from sightings of adult sea lamprey from a range of different sources. The population estimate represents the number of 1 km grids where P. marinus occurred and was extrapolated to include entire lakes where there were records of lake feeding juvenile sea lamprey.
The min and max population size estimates for the number of adults (Field 6.4) were based on an extrapolation from available annual redd count data for individual SAC rivers compiled by IFI covering the period 2000-2018. It consists of counts over extended lengths of channel (float-over surveys) in the majority of cases. This is complemented by count data from specific locations – ‘hot spot’ surveys from, for example, the Fergus at Ennis. The data were tabulated and a mean value extracted for each SAC river. A sum of the means gave a working total of 316 redds. Factoring for one male plus one female per redd gave a figure of 632 fish as a minimum. Given the observations of Kelly & King (2001) from the Mulkear, where a degree of ‘snooper male’ activity was observed, the basic redd figure of 316 was multiplied by three, giving a working maximum of 948 adult sea lamprey. This is clearly an underestimate for the national picture. It does not include any data for the Mulkear (an important river for sea lamprey) collected as hot-spot and extended walk-over figures. It does not include other rivers into which sea lamprey might migrate and spawn.
It was not possible to make a direct comparison of population size between the two reporting periods. The unit used to assess population size has changed from ‘length of inhabited feature in km’ in the previous reporting period to the ‘number of occupied 1x1 km grids’. More data were available to assess population size for P. marinus in the current reporting cycle. While fluctuations occurred in the extent of spawning activity in certain rivers there was no indication of an overall increase or decrease in this parameter and the short-term trend was assessed as stable. Although the trend is determined from data between 2009 and 2018 the trend is assumed to hold for the default trend period.
The change in population size between the two reporting periods was due to a change in the reporting unit and does not represent a genuine change.
The FRP was determined to be much greater (>>) than the estimated population size based on expert opinion. IFI fish counter data (IFI 2013-2017) have shown that in excess of 300 sea lampreys have been recorded in certain years migrating upstream on the R. Mulkear (Lower River Shannon SAC 002165). Surveys of main stem channels indicate that the number of redds is extremely low in some catchments, e.g. the R. Laune and R. Barrow. Pheromone cues play an important role in attracting migrating sea lamprey into rivers to spawn but this mechanism is not fully understood. As sea lamprey do not exhibit natal fidelity to their rivers of origin, fluctuations in numbers of P. marinus will occur in individual rivers. However, the extremely low numbers of redds encountered in targeted surveys lead to recruitment concerns for this species. ||
->HabInfo: There are two optimal habitat requirements for sea lamprey including adult spawning and larval nursery habitat. Spawning activity is found in gravelled areas of main-stem SAC rivers with a moderate gradient and water velocity. Larval habitat consists of fine-grained areas of sediment in areas of deposition and of reduced velocity.
The widespread occurrence of larval Lampetra sp. in main stem SAC channels (based on electric fishing surveys carried out in 2009-2018) indicate an adequacy of habitat for larval lamprey. Numbers of P. marinus larvae were exceedingly low in any main stem sites surveyed. This is not considered to be due to inadequate habitat and the reason for such low numbers requires significant investigation in Ireland. The main issue for sea lamprey is that the area of spawning habitat is not sufficient at a national level and particularly in SAC rivers in the southeast of Ireland. It is estimated that sea lamprey require access to 75% of main stem channel in SAC rivers to maximise spawning potential and increase the availability of suitable nursery habitat. The extent of available spawning habitat and the extent of use of this habitat was assessed in float-over surveys on main stem rivers, repeated at least three times in the period 2000-2018. Redd construction commonly occurred downstream of barriers. Barrier mitigation would allow a wider dispersal to upstream catchment areas and this may facilitate recruitment.
Data from float-over surveys in the period 2000-2018 indicate that the short-term and long-term trends for habitat are stable. The short-term trend is determined from data between 2009 and 2018 and the long-term trend is determined from data between 2000 and 2018. However, both trends are assumed to be valid also for the default trend periods specified. ||
->Future: There is no evidence to suggest that, in the next 12 years, fish barriers will be removed to expand the range to <10% below the FRR. Therefore the Future prospects of Range are bad.
There is no evidence to suggest that, in the next 12 years, pressures such as barriers to migration will be removed to expand the population to <25% below the FRP. Therefore the Future prospects of Population are bad.
There is no evidence to suggest that, in the next 12 years, pressures such as pollution or climate related impacts will be removed to improve the area and quality of the habitat. Therefore the Future prospects of the Habitat are poor. ||
->Conclusion: The Range is assessed as Bad as it is more than 10% below the Favourable Reference Range.
The Population is assessed as Bad as it is estimated to be more than 25% below the Favourable Reference Population.
The Habitat is assessed as Inadequate as the area is not considered large enough to ensure the future long-term viability of sea lamprey. This assessment has changed since the previous reporting period and is based on new data and best expert judgement.
The Overall Conservation Status of P. marinus has remained unchanged since the previous reporting period and is assessed as Bad. ||
->JustificationThreshold: N/A ||
->Other: N/A

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Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: Het precieze aantal hokken is veranderd van 125 naar 124 t.o.v. de vorige rapportage. Dit kan echter gezien worden als een fluctuatie, niet als een werkelijke verandering. ||
->Population: De populatietrend is ingeschat door de expert op basis van de beschikbare gegevens. Op basis van beperkte gegevens bij intrekpunten trekken minimaal 10.000 zeeprikken Nederland in. Welk deel hiervan succesvol paait is onbekend. De meeste zeeprikken trekken via de Maas en Rijn naar bovenstroomse delen buiten Nederland. De Roer is een opgroeigebied en waarschijnlijk ook de Grensmaas.
Vorige keer in individuen gerapporteerd, nu in km-hokken. ||
->HabInfo: Nederland is voornamelijk doortrekgebied voor de zeeprik naar bovenstroomse delen van de Rijn en Maas, al zijn er aanwijzingen dat op sommige plaatsen ook wordt gepaaid in Nederland (Roer, en wellicht beneden stuwen in Maas en Nederrijn). De habitats voor zeeprik zijn min of meer gelijk gebleven over de afgelopen decennia al is de waterkwaliteit nu beter dan in de jaren '80. ||
->Future: De verbetering van de intrekmogelijkheden door Kierbesluit en Vismigratierivier zal de intrek in NL waarschijnlijk doen toenemen. De habitatkwaliteit van de doortrekgebieden en paai- en opgroeigebieden is min of meer gelijk gebleven. Wat de effecten zijn van visserij op zee is onbekend. De connectiviteit is nog beperkend, de efficiëntie waarmee zeeprikken de huidige vistrappen weten te passeren in bijvoorbeeld Nederrijn (Winter 2010) en Maas lijkt te gering om een sterke toename van zeeprik te faciliteren in de toekomst. ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: N/A ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: The current Range surface area calculation does not represent the real range surface area, which is considered to be the range in 2013 - 63046.95km2. Change in availability of underpinning mapping data compared to 2013 has resulted in an apparent decrease in range area, but this is not genuine change. Expert opinion considers the trend to be stable. For further information see the 2019 Article 17 UK Approach document. ||
->Population: The species is very widespread and spatial distribution and annual variability of populations are not fully understood. Therefore it is not been possible to set an short term trend or FRP. Surveyor error may also be an issue. Petromyzon ammocoetes are relatively difficult to detect using standard techniques, partly because they are much less abundant than Lampetra ammocoetes, which occupy similar habitat. The current population calculation does not represent the real population. Change in availability of distribution data has resulted in an apparent decrease in the population compared to 2013, but this is not due to genuine change. Expert opinion considers the trend in population to be stable. The population in 2013 was 305km2. For further information see the 2019 Article 17 UK Approach document. ||
->HabInfo: Habitat sufficiency is unknown for this species. Evidence suggests that the historical introduction of physical barriers have precluded sea lamprey reaching their spawning grounds. Poor water quality is also a factor in some parts of the species range. ||
->Future: Future trend of Range is Unknown; Future trend of Population is Unknown; and Future trend of Habitat for the species is Unknown. For further information on how future trends inform the Future Prospects conclusion see the 2019 Article 17 UK Approach document. ||
->Conclusion: Conclusion on Range reached because: (i) the short-term trend direction in Range surface area is stable; and (ii) the current Range surface area is approximately equal to the Favourable Reference Range.
Conclusion on Population reached because: (i) the short-term trend direction in Population size is unknown; and (ii) the Favourable Reference Population is unknown.
Conclusion on Habitat for the species reached because: (i) the area of occupied and unoccupied habitat is unknown and (ii) the habitat quality is unknown for the long-term survival of the species; and (iii) the short-term trend in area of habitat is unknown.
Conclusion on Future prospects reached because: (i) the Future prospects for Range are unknown; (ii) the Future prospects for Population are unknown; and (iii) the Future prospects for Habitat for the species are unknown.
Overall assessment of Conservation Status is Unknown because two or more of the conclusions are Unknown and none are Unfavourable.
Overall trend in Conservation Status is based on the combination of the short-term trends for Range - unknown, Population - unknown, and Habitat for the species - unknown.
The overall assessment of Conservation Status is the same as in 2013, 'unknown'.
The overall trend in Conservation is the same as in 2013, 'unknown'. ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: Methodik zur Ermittlung der Populationsgröße in EU-Einheit: Wanderfische - 1. Ermittlung der besiedelten Fließgewässerabschnitte
2. Verschneidung mit dem 1x1km-Raster
3. Ermittlung der besetzten grids1x1 ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: N/A ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: N/A ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: The estimate of population size is based on an extrapolation method or expert based judgement, using when appropriate the techniques suggested by the ETC. Such methodologies may have a degree of uncertainty that cannot be quantified; for this reason, the values included in the report are to be considered approximate estimates. The population estimate is provided as a range whose minimum and maximum values are thus calculated:
• Minimum: as the intersection between the 1x1km grid, the main hydrographic network and the species' 10x10km distribution.
• Maximum: as the intersection between the 1x1km grid, the whole hydrographic network (the main plus the secondary till the 3rd order) and the species' 10x10km distribution. ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: N/A ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: 14 % below reference value in CON+BOR. ||
->Population: NT on national red list 2015, To estimate popsize in km2 predicted occurrence is restricted to the riversystem where at least one observation the last or this reporting period has been made. Population size for Petromyzon marinus in CON+BOR was based on 2018 inventories of spawning sites assuming 3-6 ind/lekgrop resulting in: Halland 139-279, Västra Götaland 121-242, Skåne 1-10, overall Min: 261, Max: 531.

To estimate current population size in the required reporting format (km2) the following procedure was done in ArcGIS. First a Range Map is constructed using the Range Tool, then a layer displaying water occurrences is applied (From SMHI, For freshwater:  surface areas for lakes (object ID 50), dams (Object ID 51) and larger watercourses (Object ID 60), and lines for rivers (Object ID 10,11) and channels (Object ID 30,31); for Baltic Sea the SMHI water basin map). Finally a grid with 1km2 squares is applied and for all biogeographic regions the number of 1 km2 squares that is within the species range and contains water is counted. ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: ETC’s (2018) range tool is used to generate a standardized grid map and to calculate the range. The distribution is based on verified reports from several datasources in Analysportalen (https://www.analysisportal.se; excerpt made in 2018), complimented with commercial landings in 2017 for Vendace and whitefish in MBAL, and adding previous reported range for all species when expert judgement (Reference group for fishes; Mikael Svensson, SLU artdatabnken, Erik Degerman SLU Aqua, Zeynep Peckan Hekim, SLU Aqua, Ann-Britt Florin SLU Aqua, Micael Söderman, Sportfisheries organisation) deemed that the species most probably where still in the area although nobody had reported it during the last assessment period since there had been no monitoring in the area. The short term trend was estimated comparing size of range in 2013 report and current report. For fish only populations reproducing within the biogeographical region and within Sweden’s territorial boundaries are counted. This means that for MBAL only the populations in the coastal area is counted. Furthermore for anadromous fish only the part of the population migrating into rivers for spawning is counted. This means that salmon in the Skagerrak/Kattegat area is assessed in the BOR and CON region and not in MBAL or MATL.

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: Según Doadrio et al. (2011), esta especie ha desaparecido o está en muy bajas densidades en los cursos fluviales en los que históricamente se encontraba en el Sur de la Península y el Mediterráneo, estando presente solamente en el río Guadiaro. El cambio producido en el rango respecto del sexenio anterior (2007-2012) se debe a un reajuste más preciso de la amplitud geográfica de la especie, por una mejora del conocimiento disponible, y por la confirmación de la desaparición de la especie de cursos fluviales en Andalucía y Cataluña (Cobo et al., 2018). ||
->Population: Durante la última década se ha registrado la lamprea marina en dos cursos fluviales andaluces (http://www.juntadeandalucia.es/medioambiente/portal_web/web/temas_ambientales/biodiversidad/0_conservacion_biodiversidad/planes_conservacion_recuperacion/peces_invertebrados/FichaPlanEpicontinentales2016.pdf), habiendo desaparecido presumiblemente la población del Delta del Ebro (Cobo et al., 2018). ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: N/A ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: Croatia share this species with non EU memberstate. It is migratory species. There are two recent records from a news papers. One specimen (55 cm) was cought in the Neretva River in Bosnia and Herzegovina near border with Croatia in 2013. Second record (80 cm) is from the Bregava River, tributary of Neretva River form 2014.
The sea lamprey is using Croatian part of Neretva River for upstream migration. It is unknown does it use delta of Neretva as a feeding area. ||
->HabInfo: Negative cross-border, upstream impacts are present. Waterflow is lower because of that. Level of melioration is very high and intensive agriculture is present. ||
->Future: Due to planned projects is questionable uncertain future migration from the sea to freshwater habitats. It is expected that climate change and cross-border pressures in combination will have a significant negative impact on habitat quality. ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: The estimate of population size is based on an extrapolation method or expert based judgement, using when appropriate the techniques suggested by the ETC. Such methodologies may have a degree of uncertainty that cannot be quantified; for this reason, the values included in the report are to be considered approximate estimates. The population estimate is provided as a range whose minimum and maximum values are thus calculated:
• Minimum: as the intersection between the 1x1km grid, the main hydrographic network and the species' 10x10km distribution.
• Maximum: as the intersection between the 1x1km grid, the whole hydrographic network (the main plus the secondary till the 3rd order) and the species' 10x10km distribution. ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Petromyzon marinus"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: N/A ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report