Geodesic
Further studies on the reproductive strategy of two demes of Asellus aquaticus (L.) (Crustacea Isopoda) from southern Italy
Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali, Série 8, Tome 83 (1989) no. 1, pp. 279-286 
Migliore, Luciana; Marchetti, Enzo; Valentino, Flora. Further studies on the reproductive strategy of two demes of Asellus aquaticus (L.) (Crustacea Isopoda) from southern Italy. Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali, Série 8, Tome 83 (1989) no. 1, pp. 279-286. http://geodesic.mathdoc.fr/item/RLINA_1989_8_83_1_a39/
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     title = {Further studies on the reproductive strategy of two demes of {Asellus} aquaticus {(L.)} {(Crustacea} {Isopoda)} from southern {Italy}},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali},
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Voir la notice de l'article provenant de la source Biblioteca Digitale Italiana di Matematica

Two demes of Asellus aquaticus (L.) (Crustacea Isopoda) from Southern Italy, living in two close but different habitats (a bight in a river and a pond) have been studied. The river gets water uninterruptedly; the pond gets rainwater, mainly in winter. The analysis of secondary productivity, as a result of (i) mean number of juveniles born per female and (ii) duration of the embryonic development, has been performed for each deme over a one year period. It evidenced that productivity is different both in the mean monthly input of juveniles and in the total annual one. The mean monthly input is different between the two demes which entrust to different physiological parameters the regulation of the reproductive strategy; that is, in the river population it depends on the duration of the embryonic development and in the pond population, on the number of juveniles per brood. The adaptive value is discussed.

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