African Nightcrawlers
Eudrilus eugeniae is a species of earthworm native to tropical west Africa and now widespread in warm regions, both wild and under vermicultureand also called as the african night crawler
growth:
• Fecundity, growth, maturation and biomass production were all
significantly greater at 25°C than 15°, 20°or 30°. {25ºC = 77ºF} • The
growth of individual earthworms increased the lower the population
density, but the greatest overall earthworm biomass production occurs at
the highest population density. • The greatest number of coccons per
week and the number of hatchlings per cocoon are obtained at 25°C.
Cocoons of E. eugeniae hatched in only 12 days at 25°C, the earthworms
at these temperatures reached sexual maturity in as little as 35 days
after hatching.
life cycle:
• Throughout its life cycle, E. eugeniae grew much more rapidly than
E. fetida, in similar environmental conditions. The West-African
nightcrawler grows well at a temperature of 75-85°F (24-29°C). Maximum
weight (11 worms per ounce) occurs within 8-10 weeks. Optimal cocoon
production is obtained when there are 150 adults per cubic foot. • The
nightcrawler (EE) has a uniform purple-grey sheen and the posterior
segments are evenly tapered to a point. The segments of the brandling
worm (EF) alternate reddish-orange and brown; the posterior segments do
not taper, and the final segment is blunt.
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