Sex versus Gender in Sea Urchins and Leeches Two Centuries after Lamarck 1816

Growth, size class frequency and reproduction of purple sea urchin, Paracentrotus lividus (Lamarck, 1816) in Bistrina Bay (Adriatic Sea, Croatia)

2002). As a consequence, echinoid stocks had to be strictly managed in order to be protected (LESSER & WALKER, 1998; YOKOTA et al., 2002). Increasing demand for sea urchin roe has led, in the last decade, to over-fishing of natural populations (CONAND & SLOAN, 1989; LE GALL, 1990). Several possible solutions have been tested; reseeding natural habitats with farmed juveniles (AGATSUMA & MOMMA, 1...

A study of the pigments of the sea-urchins, Echinus esculentus L. and Paracentrotus lividus Lamarck.

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Conspecific sperm precedence in two species of tropical sea urchins.

Conspecific sperm precedence occurs when females are exposed to sperm from males of multiple species, but preferentially use sperm of a conspecific. Conspecific sperm precedence and its mechanisms have been documented widely in terrestrial species, in which complex female behaviors or reproductive tract morphologies can allow many opportunities for female choice and sperm competition, however, ...

a synchronic and diachronic approach to the change route of address terms in the two recent centuries of persian language

terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...

Pentamerism and Modularity in Sea Urchins