The project also provided information on the movements of slugs in woodland and on boulder fields. Authors have differed in their depictions of the Kerry slug's shell plate but they are consistent in showing it as a solid plate. [36] In Iberia, juvenile Kerry slugs become active during twilight and adults become active at night, especially on rainy or very humid nights. Sites were selected on the basis that previous surveys had found high numbers of Kerry slugs in these areas [30, 33, 34, 35]. Usually this remnant is either a small, thin, shell-like plate or a collection of calcareous (chalky) granules. Its family is Arionidae, the round-backed slugs. From 1991 to 1999 between 44 and 328 eggs hatched each year allowing a number of animals to be distributed to British zoos. This characteristic is responsible for the common name of the species, the lettuce sea slug. [8] The Kerry slug has been included in molecular phylogenetics studies since 2001. case: a fossil trackway on Valentia Island in Co. Kerry. … The Kerry slug (Geomalacus maculosus) is notable for its distribution, being found only in Kerry and West Cork in Ireland as well as in northern Spain and Portugal. [10] This is behaviour is unique among species in Arionidae[11] and among slugs in Ireland. These localities fall within the boundaries of various autonomous communities: Galicia, Asturias, Cantabria, Castile and León (provinces of León, Palencia and Zamora), and the Basque Country provinces of Biscay and Álava. The Kerry Slug cannot be accused of being a pest as it is only found in the wild landscapes of the south and west. The cephalic (head) gland known as Semper's organ is well developed and shows as two strong, flattened lobes. The slug is widespread in the Old Red Sandstone areas of the National Park and populations there are contiguous with those outside the National Park boundaries. [45] The principal mechanisms used by the Directive to protect habitats and species are the creation of Special Areas of Conservation (SACs) and the protection of species independently of their habitats by other means. Revision of the genus, "Checklist of protected & rare species in Ireland", "Wildlife Act, 1976 (Protection of Wild Animals) Regulations, 1990", Department of Agriculture, Fisheries and Food, Kerry Slug Survey of Ireland (Official Website), Distribution and population dynamics of the Kerry Slug, Department of Arts, Heritage and the Gaeltacht, British Association for the Advancement of Science, "EU-protected slug Geomalacus maculosus and sympatric Lehmannia marginata in conifer plantations: what does mark-recapture method reveal about population densities? [7], The gland above the foot, the suprapedal gland, is deeply imbedded in the tissues and reaches far back. Close. It is absent from limestone areas. Here the slugs … [25], The need to improve monitoring was discussed by the NPWS Threat Response Plan of 2010, which recognised that population statistics were still deficient, particularly outside the SACs. As the Threat Response Plan noted, species monitoring is a process in which distribution and status of the subject are evaluated systematically over time. The ovotestis—a combination of ovary and testis—is small, compact and darkly pigmented. [10][44] The validity of this assessment, however, was put into question by the European Court of Justice ruling that held that Ireland was not monitoring the slug properly. The Kerry slug or Kerry spotted slug, scientific name Geomalacus maculosus, is a rare species of medium-sized to large air-breathing land slug.It is a terrestrial pulmonate gastropod mollusc in the family Arionidae, the roundback slugs. The occurrence of the wind farm within the known range of Kerry Slug (Geomalacus maculosus) together with the presenceof suitable habitat throughout the site suggests the likely presence of the species. The vas deferens and the bursa duct open nearly together into the far extremity of the atrium, the duct into which both the male and the female systems open and which connects to the outside via the genital pore. 2013 - Kerry Slug Survey A Biology.ie Project run in conjunction with University College Galway. The Kerry slug (Geomalacus maculosus) is protected by the Wildlife (Amendment) Act 2000. A special feature of the genus Geomalacus, is the extremely elongated atrium. The albumen gland, which produces albumen for the eggs, is elongated and shaped like a tongue. All are semi-translucent, milky-white or opalescent when fresh,[42] although some of the larger and more elongate eggs have a semi-transparent area at the smaller end. From 1991 to 1999 between 44 and 328 eggs hatched each year allowing a number of animals to be distributed to British zoos. [7], In the Kerry slug, as in all species within the family Arionidae, the alimentary canal of the digestive system forms two loops.[21]. Threat status Europe: Lower Risk: Least Concern ... and it has a sufficient large habitat. [29][51] The Kerry Slug Survey's investigations resulted in the publication of a guide to the population dynamics of the Kerry slug, which was published as part of the Irish Wildlife Manual series in 2011. More recently, the Kerry Slug has been found in Connemara. [37], The food of Geomalacus maculosus includes lichens, liverworts, mosses, fungi (Fistulina hepatica)[18] and bacteria that grow on boulders and on tree trunks. Birds, mammals, fish, and even the Kerry Slug all call this part of the world their home. [7], Behind the animal's head is the shield-shaped outer surface of the mantle, which is about a third of the length of the body when the slug is actively crawling and thus extended; when the slug is stationary and contracted, the shield is about half the length of the body. Within forested habitats, G. maculosus occurs as a hazel-brown to ginger-brown slug with yellow-gold spots, whereas in open areas such as blanket bogs, the slug occurs as a dark grey to je… Questo Pokémon non ha né braccia , ne gambe , ma si muove strisciando. In Ireland, it also occurs in upland conifer plantations and areas of clear-fell. The nearest European site for QI Kerry slug is the Sheep’s Head SAC, located c. 11.8 km south of the Proposed Development. [43] The Kerry slug's predators include larvae of the third instar of the fly Tetanocera elata.[43]. 0 0. Kerry Slug. [37] In Ireland, it also occurs in upland conifer plantations and areas of clear-fell. (1846). Mc Donnell, R.J. and Gormley M.J. (2011). The Kerry Slug, Geomalacus maculosus (Arionidae), which is restricted globally to Ireland and the northern Iberian Peninsula, is protected under European law. Since 1990 the species has been maintained at the Endangered Species Breeding Unit, Martin Mere, under a low‐maintenance husbandry regime. [7] The bodies of preserved juvenile specimens are up to 3 cm (1.2 in) long with a mantle length of 10 mm (0.39 in). [22], A significant proportion of the Kerry slug's range in Ireland is protected by being included in Special Areas of Conservation (SACs). In conjunction with the Valentia Heritage Society, GSI drew up a plan, adopted by Dúchas, and the site, which was discovered in 1993, was purchased by the State. Blackwater River (Kerry) Special Area of Conservation (site code IE002173) Blackwater River (Kerry) Special Area of Conservation is selected for a single habitat listed on Annex I of the Habitats Directive 4030 European dry heaths The site is also selected for the following species listed on Annex II of the same directive: 1024 Geomalacus maculosus Kerry Slug 1029 Margaritifera margaritifera … In Ireland the black morph occurs in open habitats and the brown morph occurs in woodland; this correlates with the colours of the surroundings, suggesting camouflage. There is a long retractor muscle from the bursa duct, its other end is anchored near the tail of the slug at the midline. Protection, monitoring, and captive breeding of the species have helped to keep them going. White-clawed Crayfish Austropotamobius pallipes, Ecosystems Services, Mapping and Assessment, Department of Culture, Heritage, and the Gaeltacht. [27], Within Ireland, the Kerry slug is known to occur in areas with sandstone geology in West Cork and County Kerry,[24] an area of around 5,800 km2 (2,200 sq mi). The habitat choice of A. subfuscus and P. carolinianus reflected local availability of substrate. The outermost teeth show a more embryonic character. This is quite unique for a slug. In the Iberian Peninsula, it occurs on tree trunks in oak (Quercus) and chestnut (Castanea) forest but it is easiest to find in synanthropic habitats such as rocky walls in oak or chestnut orchards, in ruins, near houses, churches and cemeteries. LATEST; TV PROGRAMMES. Kerry Slug A population of Kerry slugs has been recorded at the site. The species appears to require environments that have high humidity, warm summer temperatures and acidic soils with no calcium carbonate. This has implications for the species as it means that there is potentially more habitat for it but that as a legally protected species, the impact of forestry operations need to be mitigated for. [23][32], In Spain, the distribution of this species includes coastal locations in Galicia and extends through the Cantabrian Mountains as far east as Mount Ganekogorta in the Basque Country. Since 1990 the species has been maintained at the Endangered Species Breeding Unit, Martin Mere, under a low‐maintenance husbandry regime. The opalescent lustre disappears in a few days and the eggs turn yellowish and later brown[7] or black. [10] Official measurements of this species vary; Kerney et al. [30][50], In a report to the European Commission covering 1988–2007, the conservation status of the species in Ireland was declared "favourable (FV)" in all evaluated criteria; range, population, habitat and future prospects. This particular disjunct distribution in Iberia and Ireland with no intermediate localities is known as a "Lusitanian distribution". [27][31] The Kerry slug has been known in northern Spain since 1868 and in northern Portugal since 1873. [41] In the wild, eggs are laid between July and October,[10] and from February to October in captivity. [29] The species has also been recorded at other SACs where it is not a selection feature, for example in Derryclogher Bog, County Cork. Woodlands are dominated by tree cover, with a diverse range of animals and plants, some of which rely entirely on this as a habitat. Its habitat in Ireland is woodland and bogs within the sandstone areas of Kerry and West Cork. Within woodland the adults can be found on tree trucks and boulders always close to water. [10][23][36] Because Ireland is much further north and has a considerably cooler, wetter and more humid climate, the Kerry slug is sometimes active there in the daytime if the weather is humid and overcast. 1 offspring of three species of arionid slug, resulting in a loss of ‘species-specific’ colour character-istics. [citation needed], In Ireland, the Kerry slug occurs in woodland with oak trees, oligotrophic open moorland, blanket bogs and lake shores, especially if boulders covered with lichens and mosses are present in these habitats. Overgrazing by sheep, pollution, and loss of habitat have threatened it. In the Kerry slug, the radula is 8 mm (5/16 in) long and 2 mm (1/16 in) wide, and has 240 slightly curved, transverse rows of denticles; tiny teeth. The EC (Natural Habitats) Regulations 1997. But as 44 acres of the slug habitat will be lost during construction work, Cork County Council has been ordered to recreate 45 acres of new compensatory habitat in the general area. Kerry slug … An adult Kerry slug generally measures 7–8 cm (2.8–3.2 in) in length and is dark grey or brownish in colour, with yellowish spots. The Kerry slug or Kerry spotted slug (Geomalacus maculosus) is a species of terrestrial, pulmonate, gastropod mollusc. [6] The English-language common name is derived from County Kerry in the south-west of Ireland, where the type specimens that were used for the formal scientific description were collected. The pit, which collects extra mucus, is not conspicuous, triangular and opens transversely. [52], Since 1990, the Kerry slug has been successfully bred in captivity. [36], Until 2014, the natural enemies of Geomalacus maculosus were not known. Experiments indicate the dark colouration is induced by exposure to light as the slug develops. (The court case did not just involve the Kerry slug, but considered wider transposition failures by Ireland). There are historical desktop records from the NBDC online (“1910-1965”) for Kerry slug within the 10 km square in which the Proposed Development site is located. The Kerry slug is a gastropod, a class of molluscs that includes all snails and slugs, including terrestrial, freshwater and marine species. [13] The lower tentacles are pale-grey and translucent. Various authors have depicted its reproductive system: Godwin-Austen (1882),[14] Sharff (1891),[13] Simroth (1891, 1894),[3][15] Taylor (1907),[7] Germain (1930),[16] Quick (1960)[17] and Platts & Speight (1988). Although the distribution of this slug species includes south-western Ireland—including County Kerry—the species is more widespread in north-western Spain and central-to-northern Portugal. They concluded that the species could not be adequately safeguarded with only three sites and supported its inclusion in the Bern list, to which the Irish government is a signatory. The Kerry Slug cannot be accused of being a pest as it is only found in the wild landscapes of the south and west. Free-living slugs were photographed from six sites in Ireland across the western counties of Galway, Kerry and Cork (Fig. The Kerry slug has no keel on its back, unlike the slugs in the families Limacidae and Milacidae. [18] The elongated portion of the atrium further from the genital pore than the insertion of the oviduct is termed the atrial diverticulum. Allman, G. J. Slugs, in general, are omnivorous. The subgenus Geomalacus contains only one species, the Kerry slug; three species comprise Arrudia. Overgrazing by sheep, pollution, and loss of habitat have threatened it. [38] In Iberia it usually occurs in granite mountains,[36] and on slates, quartzite, schists, When these bands are present they usually extend the whole length of the body and are overspread by numerous, ovoid yellow spots that are distributed approximately in five longitudinal zones. The slug is mostly nocturnal or crepuscular but in Ireland it is active on overcast days. It is also found in the provinces Beira Alta, Douro Litoral, Minho, Trás-os-Montes e Alto Douro and in the Peneda-Gerês National Park. [18] As in Arion, sperm is transferred in a spermatophore. In 1842, a Dublin-based naturalist William Andrews (1802–1880) sent specimens he had found at Caragh Lake in County Kerry to the Irish biologist George James Allman. It is now known to be less dependent on sensitive, wild habitats than when these laws were introduced. The Kerry slug has an internal shell or shell plate that resembles those found in land slugs of the genus Limax; it is ovoid, solid and chalky with a transparent conchiolin (horny) base. Under this definition, no monitoring of the Kerry Slug had been undertaken in Ireland as of May 2010. At first glance, the rugged landscapes of the Gap of Dunloe might not seem like the most welcoming habitat for animals, but you would be surprised to know just how rich in wildlife this region is. The shell plate is usually convex above and concave beneath and has some indistinct, concentric lines of growth. Clues from a phylogenetic analysis of mitochondrial cytochrome b sequences", "Genetic study reveals close link between Irish and Northern Spanish specimens of the protected Lusitanian slug, Kerry Slug researcher visits Baile Bhúirne and Beara, "Habitat suitability modelling of four terrestrial slug species in the Iberian Peninsula (Arionidae: Geomalacus species)", "Husbandry and breeding of Kerry spotted slug", "Slugs of Portugal. Black slugs predominate in heathlands, whereas the brown form is only found in woodlands. [24][36] Other threats include intensification of land use, land reclamation, use of pesticides, overgrazing by sheep, removal of shrubs, tourism, general development pressures, planting of conifer plantations, the spread of invasive plants such as Rhododendron ponticum and habitat fragmentation[24][44] (see also Moorkens 2006). For instance, the Kerry slug which when threatened retracts its head & lets go of the substrate, rolls up completely and stays contracted in a ball-like shape. [10][40] In the wild, the Kerry slug can live for up to seven years[10] but in captivity, the lifespan rarely exceeds three years. Species Name: Kerry spotted slug Scientific Name: Geomalacus maculosus Habitat: Grazes on lichens on rocks and trees in wooded areas Legal Status: Directive 92/43 Annex II IV Berne Convention Annex II Possible Designation: SAC NHA "On a new genus of terrestrial gastropod". The Wildfowl & Wetlands Trust, a British conservation organisation, operates a captive breeding programme in terraria at its "Endangered Species Breeding Unit". [18] The sexual organs, called atria—singular:atrium—are funnel-shaped with fluted edges after mating. There has been speculation that G. maculosus was introduced to Ireland from Iberia by prehistoric humans; a similar introduction appears to have happened with the Eurasian pygmy shrew. Unsurprisingly, the research found that most slugs do not appear to move far. The ovispermatoduct, along which both eggs and sperm pass, is greatly twisted. This turns into the free oviduct after the vas deferens carrying the sperm branches off. Kerry Slugs are protected in all of the locations that they are found in. [25][26] In support of such an origin or of a more recent human-mediated introduction, the genetic diversity of the Kerry slug in Ireland was found to be greatly reduced compared with that of the Iberian populations. [32], Natura 2000 sites for this species in Spain include 48 localities (listed below, grouped by region). One of the wonders of Kerry is its diversity. Habitat. An invertebrate species with a distribution similar to theHiberno-lusitanian plant species is the Kerry slug (Geomalacus maculosus). In this species, the ventricle of the heart is directed towards, and is very close to, the anal and respiratory openings. The habitat of the Kerry Slug in Ireland is woodland and bogs within the sandstone areas of Kerry and west Cork. The Coasts and Islands of Kerry . [40], This article incorporates public domain text from Taylor (1907). The Kerry slug or Kerry spotted slug, scientific name Geomalacus maculosus, is a rare species of medium-sized to large air-breathing land slug.It is a terrestrial pulmonate gastropod mollusc in the family Arionidae, the roundback slugs.. An adult Kerry slug generally measures 7–8 cm (2.8–3.2 in) in length and is a dark grey colour with yellowish spots. It is a medium-to-large sized, air-breathing land slug in the family of roundback slugs, Arionidae. Broadcast on: August 07th, 2018. The slug with relatives in Portugal has been found only in Cork and Kerry until recently when it emerged in Connemara and is one of the southwest’s Iberian species.

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