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The unisexual females often look like blue-spotted salamanders but have hybrid genomes [9] and require sperm from a co-occurring, related species to fertilize their eggs and initiate development. Usually the eggs [ 10 ] then discard the sperm genome and develop asexually (i.e., gynogenesis , with premeiotic doubling); however, they may ...
Spotted salamanders do produce poisonous skin secretions, which allow them to taste bad to predators. For a human, these skin secretions are more irritating and would not kill an adult or even a ...
The spotted salamander is about 15–25 cm (5.9–9.8 in) long, [7] with females generally being larger than males. [8] They are stout, like most mole salamanders, and have wide snouts. [3] The spotted salamander's main color is black, but can sometimes be a blueish-black, dark gray, dark green, or even dark brown.
Normally fish would eat salamander eggs, but in the vernal pools the eggs are safe. The hatched salamanders can also thrive. [5] [3] Salamanders are explosive spawners and the females lay thousands of eggs which they attach to sticks below the water. In addition to the loss of the hatching larvae to predators, the larger larvae engage in ...
The skin of some species contains the powerful poison tetrodotoxin; these salamanders tend to be slow-moving and have bright warning coloration to advertise their toxicity. Salamanders typically lay eggs in water and have aquatic larvae, but great variation occurs in their lifecycles. Some species in harsh environments reproduce while still in ...
These have often selected offshore islands as nest sites, as the islands historically had fewer predators than the mainland. Accidental introductions of predator species have upset seabird reproduction, as the predators have a concentrated supply of food in the form of eggs on the ground or in burrows, and can increase rapidly.
Plethodontidae, or lungless salamanders, are a family of salamanders. [ 1 ] [ 2 ] With over 500 species, lungless salamanders are by far the largest family of salamanders in terms of their diversity. Most species are native to the Western Hemisphere , from British Columbia to Brazil.
Red-backed salamanders are thought to be the most abundant salamander in our area. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in ...