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There are many different combinations and gradients betweensemelparityand iteroparity.
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Semelparityis an r-selected trait, whereas iteroparity is a k-selected trait.
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The plants are perennial, but each rosette flowers once and then dies (seesemelparity).
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Semelparityalso was found to occur in this species, but is hypothesized to occur only due to phylogenic constraints.
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These trade-offs come into play in the evolution of iteroparity andsemelparity.
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Semelparityalso occurs in smelt and capelin, but is very rare in vertebrates other than bony fish.
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These two species have the same rate of population growth, which suggests that even a tiny fecundity advantage of one additional offspring would favor the evolution ofsemelparity.
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