is defined by a single, highly fecund bout of reproduction and death of the individual; in contrast, iteroparity is defined by repeated bouts of reproduction throughout life (Cole 1954, Charnov & Schaffer 1973, Young 1981, Crespi & Teo 2002).
in a population of Gracilinanus agilis (Didelphimorphia: Didelphidae) inhabiting the Brazilian Cerrado.
These and previous data provide the groundwork for more studies that may reveal patterns regarding semelparous life-history strategies in vertebrates that inhabit environmentally extreme areas of the world, and provide insight into the role of semelparity
in evolution of tetrapods.
Fitch and Sandidge (1953) interpreted Didelphis virginiana semelparity
by saying that either females are preyed upon after first breeding or they remain too exhausted to breed for a second time.
A complicating factor for eel management is that these fish exhibit "semelparity
." When mature, they spawn only once and then die.
Finally, environmental stochasticity and its impact on the likelihood of offspring survival also selects against "explosive" reproduction (i.e., semelparity
187-190) suggest that in the individuals with higher (total) fecundity a shift toward a reduction in reproductive life span (i.e., semelparity
) will be favored, whereas low fecundity increases importance of later reproduction and thus a lengthening of reproductive life span (iteroparity).
The subclass [[mu].sub.2] [right arrow] 0, p [right arrow] 1 is often referred to as precocious semelparity
which covers species with rapid development followed by only one reproduction, for example, biennials and annual plants (see ).
Boldly polka-dotted marsupials a bit bigger than a squirrel, Northern quolls (Dasyurus hallucatus) are among the very few mammals that practice the lifestyle called semelparity
, living for only a single, albeit intense, breeding season.
American Shad show a latitudinal gradient between semelparity
and iteroparity throughout its range (Leggett and Carscadden, 1978).