Article 17 web tool

Scientific name used in original MS report if different than recommended: "Delphinus delphis"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: Para la estimación del rango se ha efectuado un polígono mínimo convexo (MCP) con las localizaciones encontradas en cada demarcación marina, ya que ha resultado ser el medio más fidedigno de representación, al compararlo con diversos modelos (GAM, Kernel, etc.). Para ello se ha empleado el MCP al 95% mediante la herramienta Home Range Tools para ArcGIS 10.1. ||
->Population: La estima poblacional proviene del SCANS-III. No se considera comparable por extensión y diferencias metodológicas con los 17.916 ejemplares estimados para el periodo anterior.
Para determinar el área de ocupación se consideran las cuadrículas que intersecan con el rango y aquellas cuadrículas 10x10 donde hay registros de presencia pero no están incluidas ||
->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: "Delphinus delphis"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: Les données disponibles sont constituées de données d'échouages et d'observations réalisées lors de campagnes en mer
dédiées ou non aux cétacés, mais dans tous les cas avec un effort maîtrisé (PELGAS, IBTS, EVHOE, CGFS, PACOMM-SAMM, SCANS_III)
||
->Population: N/A ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: QA feedback :
Confirmation de l'évaluation Défavorable-inadéquat U1 pour les Perspectives futures - L'habitat de cette espèce en hiver sur le plateau continental est une zone où l'effort de pêche est très important, et expose l'espèce à un risque très élevé de mort dans les engins de pêche. Sans mesures efficaces, les perspectives pour cette espèce pourraient devenir médiocres voire mauvaises.
Confirmation de la tendance générale "En détérioration" - L'évaluation des captures accidentelles suggère une pression non soutenable à terme pour la population de dauphins communs dans le golfe de Gascogne. ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Delphinus delphis"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: The natural range of Short-beaked common dolphins in Irish waters, and marine waters covered by the Directive, is a small component of the species’ wider North Atlantic range (Hammond et al., 2008; Perrin, 2009; DEHLG, 2009; Hammond et al., 2017; Rogan et al., 2018), while ongoing evidence from repeated high quality surveys (Berrow et al., 2018; Rogan et al., 2018) continues to confirm the species’ occurrence in Irish waters in all seasons.
The range map provided consists of the species’ recorded and likely predominant natural range based on comparatively recent data (2001-2018) and expert judgement, and is partly derived from 2.3. It consists of a block of contiguous 50km x 50km grid cells distributed in Irish marine waters including the Irish Sea and coastal areas, and now includes the relevant assessment area under the Marine Strategy Framework Directive.
Prior to 1999-2000, survey effort targeting cetacean species in Irish offshore waters was comparatively limited in coverage, both spatially and temporally. Since 1999-2000 a number of dedicated multi-annual surveillance programmes for cetaceans have operated in Irish waters, with visual and acoustic surveys extending to the limits of Ireland’s EEZ and beyond. With regard to this species it is considered that the years 2007-2018 represent an appropriate period for the evaluation of short-term trends since all survey efforts intensified further during this period.
Sighting records from ongoing dedicated surveillance effort in Irish waters (e.g., Berrow et al., 2010; Baines et al., 2013; Wall et al., 2013; Oudejans, 2014; Cronin & Barton, 2014; Craig et al., 2016; Kavanagh et al. 2017; O’Donnell et al., 2017; O’Sullivan & Manning, 2017; Berrow et al., 2018; O’Brien & Berrow, 2018; Rogan et al., 2018) provide no evidence of a decline in distribution/range in the recent past. Therefore the short-term trend for range is considered to be stable.
The long-term trend over the period 1994-2018 is considered to be uncertain for this species due to limited data availability prior to 1999-2000, as outlined above.
The range value derived from the map referred to above is considered to be a revised baseline for this species. This surface area calculation is slightly greater than that reported in 2013.
Since there is no evidence of a decline in range since the Directive came into force the current range is set as the FRR.
There is an assumption that the current range in Irish waters is large enough (a) to encompass all of the ecological variation required by this species during its occurrences therein and (b) to contribute to the long-term survival of the species. ||
->Population: Evidence from multi-annual surveillance programmes (e.g., Ó Cadhla et al., 2004; Berrow et al., 2010; Wall et al., 2013; Kavanagh et al., 2017; Berrow et al., 2018; Rogan et al., 2018) demonstrate that Short-beaked common dolphins occur widely in Irish waters and do so throughout the year. This is generally the case throughout continental shelf and slope habitats and also in adjacent waters over 2,000m in depth, though the species’ presence is much less pronounced in the western Irish Sea.
Recent and comprehensive data for the entire region of western Europe have been lacking until recently, particularly with regard to sufficient temporal (i.e., beyond one or more summer months or one year) and spatial coverage (i.e., spanning continental shelf, slope and deeper abyssal waters, all of which may represent Short-beaked common dolphin habitat).
Within the North-East Atlantic, based on aerial survey effort approximately 269,000 Short-beaked common dolphins were estimated to occur in the summer of 2016 in waters off western Europe but excluding Ireland (Hammond et al., 2017). A further 199,133 Short-beaked common dolphins were estimated from ship-based survey data collected further offshore during the same period (Hammond et al., 2017).
Short-beaked common dolphin data from Ireland’s ObSERVE Programme (see Berrow et al., 2018 and Rogan et al., 2018) have not yet been integrated into a European-wide assessment of population size for the species, although this should now be feasible given simultaneous aerial survey efforts in the summer of 2016 (Hammond et al., 2017; Rogan et al., 2018).
In a new departure for data acquisition on Short-beaked common dolphins in Irish offshore and inshore waters the aerial surveys carried out under this programme were quite successful in enabling abundance estimates to be derived from the sighting data on small dolphin species. However due to difficulties distinguishing visual records of this species from other smaller dolphins, particularly Striped dolphins, for this assessment it was necessary to use only those estimates derived from confirmed sightings of the species (i.e., common dolphin; Rogan et al., 2018).
The most robust of these four seasonal estimates (i.e., those with the lowest CV = 0.39; winter 2015) has been presented in 6.2 via minimum and maximum 95% Confidence Limits.
The Favourable Reference Population has been set as approximately equal to the current population to account for improved knowledge. Although the short-term trends are uncertain this value is considered to represent the minimum necessary to ensure the long-term survival of the species. ||
->HabInfo: Use of the range descriptor and range surface area calculation as proxies for habitat and habitat area are judged appropriate for this wide-ranging pelagic and oceanic species. The species’ natural range and thus habitat in Irish waters is a small component of its wider North Atlantic range (Hammond et al., 2008; Perrin, 2009; DEHLG, 2009; Wall et al., 2013; Hammond et al., 2017; Rogan et al., 2018).
The quality of habitat for Short-beaked common dolphin was determined by consideration of the relevant direct and indirect pressures thought to be acting on the species and/or its functional group, and its habitat within its natural environment. These pressures were evaluated in development of the Conservation Plan for Cetaceans in Irish waters (DEHLG, 2009) and informed by more recent scientific surveillance (e.g., Baines et al., 2013; Cronin & Barton, 2014; Craig et al., 2016; Hammond et al., 2017; Kavanagh et al., 2017; O’Sullivan & Manning, 2017; Berrow et al., 2018; O’Donnell et al., 2018a; O’Donnell et al., 2018b; Rogan et al., 2018), using available data concerning, inter alia, habitat use, population size, distribution and ecology, and threats to the species’ protection (e.g., via natural/biological sources, human sectoral activities, management gaps, etc.).
Short-beaked common dolphins may be subject to a number of local and/or regional environmental pressures throughout their range in Irish waters (DEHLG, 2009). However, based on current spatial and temporal data none are considered to be of sufficient impact on the species to be causing a significant deterioration in overall habitat quality in Ireland from a status that is sufficient for long-term survival.
Long-term trends in habitat for Short-beaked common dolphin remain uncertain due to insufficient accurate data for this species prior to 1999-2000. However, with improved surveillance and numerous ongoing records of Short-beaked common dolphins in the last 18 years, the short-term trend indicates the continued existence of sufficient quality habitat for the species. ||
->Future: Visual records of Short-beaked common dolphin in Irish waters indicate a wide and quite regular occurrence of the species in waters overlying the continental shelf and slope, and also deeper oceanic basins, off the south, west and north of Ireland in particular.
Since many significant (i.e., high level) anthropogenic impacts that may affect this wide-ranging species’ distribution are more localised in space and time within this extensive and diverse marine area, the Future prospects for the Range and Habitat for the species are considered to be Good.
A number of pressures that could act upon this species have been identified. The effect of these pressures may operate on a temporary and/or regional scale and some are likely to continue to act as pressures into the future thereby constituting a potential threat.
While the impacts on individuals or populations of Short-beaked common dolphin in Irish waters are not well understood, partly due to continuing uncertainty regarding its population trends and ecology within Ireland’s marine area, ongoing threats as listed or identified into the future via surveillance will be managed appropriately in Ireland. Therefore the Future prospects for the Population are considered to be Good. ||
->Conclusion: Contemporary sightings of Short-beaked common dolphins indicate a wide occurrence of this species throughout Irish coastal and offshore waters, from those overlying the continental shelf and continental slope to deeper ocean basins (e.g., Rockall Trough, Porcupine Seabight). Hence the Range and Habitat for the species are considered to be Favourable.
While robust and long-term data on Short-beaked common dolphin population size and trends in Irish waters as a whole are not available, knowledge of the species’ seasonal distribution and summer abundance in western European waters has improved significantly since the Directive came into force.
There has also recently been some improvement in population abundance data from a large part of the Irish EEZ, yielding new estimates and associated 95% Confidence Limits based on dedicated cetacean surveillance since 2013.
While there is some uncertainty in the trajectory of North-East Atlantic populations of Short-beaked common dolphin, given the available estimates for a large part of Irish waters and the species’ wide occurrence throughout the year, the Population parameter is considered to be Favourable.
A number of pressures have been identified. While the effect of these pressures may act on a temporary and/or regional scale and some are likely to continue to act as pressures into the future, none is considered to be of sufficient magnitude to be causing an adverse impact on populations of Short-beaked common dolphin in Irish waters. Ongoing threats as listed or identified into the future via surveillance will be managed appropriately. Hence the Future prospects for the species are considered to be Favourable.
Based on the assessments for the Range, Population, Habitat and Future prospects parameters, the overall conclusion is that the Conservation Status of Short-beaked common dolphin in Ireland remains Favourable. This overall result is the same as the previous Article 17 assessment. ||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Delphinus delphis"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: considering the very large mobility of the species, range refers to the largest poligon occupied by all sightings ||
->Population: Annual aerial census were performed between 2010 and 2015 (LIFE+ MarPro) until the ±50 nm limit from the coast, leading to a multi-year mean estimate of 45179 individuals. This value is in line with the estimate in the previous reporting period obtained by the same method (excluding estimates for the offshore population). ||
->HabInfo: Whereas area and quality of occupied habitat are considered sufficient for long‐term survival, Human pressures and threats (mainly the very high % of incidental capture - Bycatch) may lead in the future to a deteriorating habitat quality ||
->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: "Delphinus delphis"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: Range estimated for the current period matches the range given in the 2013 reporting round (excluding analytical differences). This range is considered sufficient and includes all significant ecological variations to ensure survival of the species. Areas within the range are utilised to a lesser or greater extent. ||
->Population: The estimate of population size (6.2) is given as a point estimate (6.2d) with the corresponding 95% confidence intervals (6.2b&c). The abundance estimate is considerably higher than that of the last reporting round in 2013, with no overlap between the confidence intervals of both estimates, indicating that there is a significant difference between the two values. However, as there are only two abundance estimates covering the entire UK range for this species, it is not possible to disentangle trends from fluctuations in natural abundance. ||
->HabInfo: N/A ||
->Future: These results are based on the current conservation status for each parameter combined with the future trend for each parameter. The future trend is an estimate of how the parameter is likely to progress into the future, using the current trend as a baseline and considering the balance between threats and measures to assess how these are likely to affect that trend over the next two reporting cycles (12 years). For common dolphin, the future trend of Range is assessed as Overall Stable. As the current conservation status for Range is Favourable for this species, the future prospects are considered Good.
The future trend and consequently the future prospects for the Population and Habitat parameters are assessed as Unknown; this is due to there being insufficient data to establish current trends for these parameters
||
->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 FRP is unknown; and (ii) the short-term trend direction in Population size is unknown.
Conclusion on Habitat for the species reached because: (i) the area of habitat is sufficiently large but (ii) the habitat quality is unknown for the long-term survival of the species; and (iii) the short-term trend in area and quality of habitat is unknown.
Conclusion on Future prospects reached because: (i) the Future prospects for Range are good but; (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.
Overall trend in Conservation Status is based on the combination of the short-term trends for Range - stable, Population - unknown, and Habitat for the species - unknown.
||
->JustificationThreshold: N/A ||
->Other: N/A

Open Original Report  

Scientific name used in original MS report if different than recommended: "Delphinus delphis"
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: "Delphinus delphis"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: Evaluation of marine mammals population- conform Birkun A. Jr, Northridge S. P., Willsteed E. A., James F. A., Kilgour C., Lander M., Fitzgerald G. D., 2014. Studies for Carrying Out the Common Fisheries Policy: Adverse Fisheries Impacts on Cetacean Populations in the Black Sea. Final report to the European Commission, Brussels, 347p ||
->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: "Delphinus delphis"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: Para la estimación del rango se ha efectuado un polígono mínimo convexo (MCP) con las localizaciones encontradas en cada demarcación marina, ya que ha resultado ser el medio más fidedigno de representación, al compararlo con diversos modelos (GAM, Kernel, etc.). Para ello se ha empleado el MCP al 95% mediante la herramienta Home Range Tools para ArcGIS 10.1. ||
->Population: Estima poblacional en abse a los ejemplares mínimos detectados en el proyecto Mistic Seas II.
Para determinar el área de ocupación se consideran las cuadrículas que intersecan con el rango y aquellas cuadrículas 10x10 donde hay registros de presencia pero no están incluidas. No se considera comparable por extensión y diferencias metodológicas con las 502 cuadrículas estimadas para el periodo anterior. ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: Megaptera novaeangliae presence in Canary marine demarcation area is rare

Open Original Report  

Scientific name used in original MS report if different than recommended: "Delphinus delphis"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: "5.1 Considering that marine mammals are migratory and highly mobile species, range surface area is assumed as the maritime waters under Azores and Madeira jurisdiction (including internal and territorial waters and the Portuguese sub-areas of the Exclusive Economic Zone).

5.10 Favourable reference range is unknown according to expert opinion. Marine mammals are highly migratory and their ecological range and distribution are very wide, at the ocean basin scale and, therefore, much greater than the biogeographical region.
" ||
->Population: para as águas costeiras, i.e. até cerca dos 20 km das ilhas Madeira, Desertas e Porto Santo
short term trend avaliado com base em dados apenas para a costa Sul da Madeira

As estimativas populacionais foram elaboradas com base em amostragem dirigida obtida através do programa oceânico do projeto MISTIC SEAS II. Correspondem à soma das estimativas populacionais dos 2 arquipélagos para uma área de 32.804 km2 para o Arquipélago dos Açores e de 1.907 km2 para o arquipélago da Madeira (34.711km2 de um total MMAC PT = 1.450.200km2=2.39% do total do range MMAC PT). Por esta razão as estimativas MMAC foram consideradas como correspondendo a um valor mínimo (reportado como best single value) conforme indicam as guidelines do Art. 17, para casos em que a área amostrada corresponde a uma subestimativa considerável da área total da região biogeográfica.
Azores: Design-based Abundance=205 60%CV Area = 32804 km2 ||
->HabInfo: 7.1 Sufficiency of area and quality of occupied habitat unknown according to the guidelines (habitat area is stable but the quality is unknown - Table 4: Assessing trend direction of habitat for the species) ||
->Future: A espécie ocorre nos Açores durante todo o ano, sendo uma das espécies mais abundantes.
No arquipélago da madeira, a espécie pode ser considerada bastante comum e ocorre de um modo sazonal definido, sobretudo no Inverno e na Primavera. Dados genéticos sugerem que os indivíduos da espécie que ocorrem nos arquipélagos da Madeira e dos Açores pertencem à mesma população.
O seu estatuto de conservação (IUCN) para a Região é POUCO PREOCUPANTE

Açores: Baseado na opinião dos peritos ainda não há dados suficientes para se poder avaliar a espécie, pelo que se reportou unknown em todos os campos de avaliação. ||
->Conclusion: Açores: Baseado na opinião dos peritos ainda não há dados suficientes para se poder avaliar o estado de conservação atual da espécie, pelo que se reportou unknown em todos os campos de avaliação. ||
->JustificationThreshold: N/A ||
->Other: Açores:
Campo 2. Os mapas de distribuição foram elaborados com base em registos de ocorrências do Programa de Observação das Pescas dos Açores (POPA) e que são de observação de cariz oportunista e não amostragens dirigidas. No entanto, cobrem uma área de cerca de 20% do range total do Mar dos Açores (200.000km2 de 984.900km2), uma área muito mais abrangente que as áreas de estudo do projeto MISTIC SEAS II (<3% da área total do range MMAC PT).

Campo 6. As estimativas populacionais foram elaboradas com base em amostragem dirigida obtidas através do programa oceânico do projeto MISTIC SEAS II. Correspondem à soma das estimativas populacionais dos 2 arquipélagos para uma área de 32.804 km2 para o Arquipélago dos Açores e de 1.907 km2 para o arquipélago da Madeira (34.711km2 de um total MMAC PT = 1.450.200km2=2.39% do total do range MMAC PT). Por esta razão as estimativas MMAC foram consideradas como correspondendo a um valor mínimo (reportado como best single value) conforme indicam as guidelines do Art. 17, para casos em que a área amostrada corresponde a uma subestimativa considerável da área total da região biogeográfica.

13.3 Azores: For the distribution map the data were collected under the Azorean Fisheries Observer Program (POPA; www.popaobserver.org) and consisted of dedicated visual transects, which were performed following a fixed protocol by fishery observers on-board pole-and-line tuna vessels.

Open Original Report  

Scientific name used in original MS report if different than recommended: "Delphinus delphis"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: Para la estimación del rango se ha efectuado un polígono mínimo convexo (MCP) con las localizaciones encontradas en cada demarcación marina, ya que ha resultado ser el medio más fidedigno de representación, al compararlo con diversos modelos (GAM, Kernel, etc.). Para ello se ha empleado el MCP al 95% mediante la herramienta Home Range Tools para ArcGIS 10.1. ||
->Population: Estima poblacional realizada en el ACCOBAMS Survey Initiative (2018).
No se considera comparable con los 10.000-50.000 ejemplares comunicados en el periodo anterior, a falta de obtener los datos del ASI procesados, previsto para 2019.
Para determinar el área de ocupación se consideran las cuadrículas que intersecan con el rango y aquellas cuadrículas 10x10 donde hay registros de presencia pero no están incluidas ||
->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: "Delphinus delphis"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: Les observations sont rares en Méditerranée occidentale, et seulement 2 échouages ont été recensés en Corse pendant la dernière période d’évaluation. ||
->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: "Delphinus delphis"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: N/A ||
->HabInfo: The surface area of the habitat is estimated at 88385 km2 (equal to range) and its quality is bad. ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: Two different marine habitats for different populations exist for this species in Greece: a) shallow, often very coastal and sheltered waters, at depths of less than 200 m over the continental shelf for all but one population units, b) usually at depths above 500 m offshore waters for only one and likely isolated population unit (in the Gulf of Corinth). There are no abundance estimations for any other population except the one of the inner Ionian Sea, where 15-25 individuals are left of a population estimated to include about 120 animals in 1995 (comprehensive inventory). There is a rough population estimation for the Gulf of Corinth (10-40 individuals, comprehensive inventory and extrapolation from surveys). For the rest of the territory the method used was based on what should be a reasonable minimum and maximum density based on expert opinion. The densities recorded in the western Mediterranean (0.03-0.15 individuals/km²) seem unrealistic for the oligotrophic eastern Mediterranean and the Greek Seas. Considering that Delphinus delphis: a) is much less abundant than Tursiops truncatus (the other coastal dolphin species in Greece) in most of the territory if not all (according to relative abundances and guesses of relative abundance based on opportunistic sightings and strandings in each area) and b) occupies less than the 60% of range of Tursiops truncatus, a number close to the half the population estimation of Tursiops truncatus is proposed as maximum. However, the real figures are likely to be closer to the proposed minimum (750) than this maximum (4200) for the entire territory. The only population that has been studied exhaustively from 1991 to 2007 showed a dramatic decline. It is likely that similar phenomena are occurring to the other Greek populations, although no research has been conducted. The main cause (epipelagic fish stock depletion by overfishing) of population decrease is present in most Greek Seas. Furthermore, during the last decades the species disappeared from most places of the western Mediterranean and the Adriatic Sea. The Mediterranean population of short-beaked common dolphins (Delphinus delphis) has been listed as “Endangered” by IUCN in 2003. The range and the habitat of the species are covered very partially by the only two truly marine Natura 2000 sites: the internal Ionian Sea and the Northern Sporades. It has to be noted that in both these Natura 2000 sites not a single conservation measure has been taken specifically for common bottlenose dolphins and cetaceans in general.

Open Original Report  

Scientific name used in original MS report if different than recommended: "Delphinus delphis"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: N/A ||
->Population: 1970tih desio se nagli pad populacije u Jadranu. Od tada je vrsta u potpunosti nestala iz sjevernog dijela Jadranskog mora (Bearzi 1989; Notarbartolo di Sciara i Bearzi 1992; Bearzi i Notarbartolo di Sciara 1995; Bearzi, Politi i sur. 2000). Od tada se viđaju samo pojedinačne zalulate jedinke.
Istraživanje iz zraka provedeno u 2010. i 2013. obuhvatilo je cijelo Jadransko more (Fortuna, Holcer i sur. 2011; Fortuna, Mackelworth i sur. 2014), ali nije bilo opažanja kratkokljunog običnog dupina što dovodi do zaključka da je vrsta regionalno izumrla u Jadranskom moru. ||
->HabInfo: N/A ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: 1970tih desio se nagli pad populacije u Jadranu. Od tada je vrsta u potpunosti nestala iz sjevernog dijela Jadranskog mora (Bearzi 1989; Notarbartolo di Sciara i Bearzi 1992; Bearzi i Notarbartolo di Sciara 1995; Bearzi, Politi i sur. 2000). Od tada se viđaju samo pojedinačne zalulate jedinke.
Istraživanje iz zraka provedeno u 2010. i 2013. obuhvatilo je cijelo Jadransko more (Fortuna, Holcer i sur. 2011; Fortuna, Mackelworth i sur. 2014), ali nije bilo opažanja kratkokljunog običnog dupina što dovodi do zaključka da je vrsta regionalno izumrla u Jadranskom moru.

Open Original Report  

Scientific name used in original MS report if different than recommended: "Delphinus delphis"
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: "Delphinus delphis"
Information provided in the field 2.8.2: Reported additionnal information: ||
->Range: From data collected in various LIFE projects, namely LIFE Malta Seabirds project, LIFE+ MIGRATE project and the LIFE BaĦAR for N2K project, Delphinus delphis, not only appears to occur regularly in Maltese waters throughout the year, but most records occur within the 12 nautical miles boundary of the Maltese waters.

From the limited data available on the species’ distribution in Maltese waters, it is not possible to tell whether a resident population occurs; however, most records of the species are considered to be of a migratory nature. Furthermore, because of the lack of data, the range trend and Favourable Reference Range cannot be assessed. ||
->Population: From data collected in the various LIFE projects mentioned earlier, group sizes ranged from a few individuals to an estimated group of 50. Bearzi et al. (2003) also refered to a localised concentration of this species around the Maltese Islands. However, this species displays long distance movements across the basin (Genov et al., 2012) with seasonal changes in abundance (Canadas et al., 2008).

In the systematic surveys carried out through the LIFE+ MIGRATE project (in 2013 and 2014), Delphinus delphis had a relative abundance similar to that of Tursiops truncatus, which is of about 3 individuals detected on 100 km of effort. D. delphis showed group sizes ranging from 3 to 45 individuals, and a mean group size of 20 individuals. The mean group size obtained for this species was slightly lower than that of previous research in Maltese waters (Vella, 2004).

In the recent past, population declines have occurred within the Mediterranean Sea (Canadas et al., 2008). However, in view of the lack of data available on the species’ population in Maltese waters, and considering that the species only migrates through Maltese waters, the population trend and Favourable Reference Population cannot be assessed. ||
->HabInfo: Observations of Delphinus delphis are based on sightings data; however, the nature of the habitats, and how these are used by the species, cannot be determined. As such, the occurrences of the species cannot be linked to habitats critical for their survival. More studies would be required to determine the relevance of the habitat. ||
->Future: N/A ||
->Conclusion: N/A ||
->JustificationThreshold: N/A ||
->Other: In the period under review, various surveys were carried out, gathering baseline data on cetaceans in Maltese waters. Together with the systematic surveys carried out specifically for marine mammals and reptiles through the LIFE + MIGRATE, during the summer of 2013 and 2014, other opportunistic surveys for these species were carried out through the LIFE Malta Seabirds project (in 2012 and 2013) and LIFE BaĦAR for N2K project (in 2015 and 2016). Although these have given an indication of the nature of occurrence of Delphinus delphis, further studies would be required to give a more complete picture of the parameters and trends required to assess the conservation status of the species.

Noting the migratory nature of the species, national data will be made available to regional bodies for further studies to be carried out with the aim of addressing remaining knowledge gaps on the species.

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Scientific name used in original MS report if different than recommended: "Delphinus delphis"
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