Meadow Slug

Fascinating facts about the Meadow Slug

• Deroceras laeve is the only land gastropod that deliberately enters water and can survive for days while submerged. It needs permanently wet habitats and is most often found in lowlands, swamps, riversides and other very humid areas such as alder and oak woods. Its high ecological tolerance lets it live from sub-polar to tropical zones, and this water-loving habit enables it to be carried downstream by flowing water, spreading the species to new sites.
• The life cycle of Deroceras laeve is extremely short, completing in less than a month from egg to adult. Eggs hatch after two to four weeks, producing juveniles only three to five millimetres long that grow rapidly, allowing up to five generations to be produced within a single year. Because several generations coexist, the population can expand quickly, yet individual slugs live no longer than one year.
• Deroceras laeve can produce up to five generations each year, with overlapping cohorts meaning many age groups are present at once. The species often exhibits a reduced penis, allowing individuals to self-fertilise and maintain reproduction even when mates are scarce. Eggs are small, 1.5-2 mm in diameter, and hatch after two to four weeks, feeding the continual turnover of generations throughout the year.
• Deroceras laeve lays translucent eggs about 1.5-2 mm across that can remain viable even when fully submerged. After a incubation of two to four weeks the juveniles, only 3-5 mm long, may hatch beneath the water surface and then crawl upward to emerge on land. This ability lets the slug colonise newly flooded habitats and disperse downstream with flowing water.
• Deroceras laeve possesses a diploid set of 31 chromosomes and a nuclear genome of roughly 1.9 gigabases. Within this DNA it harbours 24 337 protein-coding genes, a count that reflects a whole-genome duplication event typical of stylommatophoran slugs. Most of the genome is made up of transposable elements and low-complexity repeats, while specialised small-RNA pathways such as microRNAs and piwi-interacting RNAs are also present.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Meadow Slug

In the damp, moonlit meadows, a silent wanderer emerges, its gelatinous form undulating as it glides effortlessly across the dew-kissed grass. The meadow slug, a master of stealth, leaves behind a trail of shimmering silver, a testament to its nocturnal exploits as it navigates the intricate network of blades and petals with an almost ethereal grace. As it moves, its very body seems to blur the boundaries between creature and landscape, becoming one with the soft, dark earth that nurtures it.

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