Biomedical subjects

P K Dayton

Publications and source records attributed to P K Dayton.

2 recordsLinked to original sources

PubMed1997

Function of the human hymen.

The few existing hypotheses for the function of the human hymen are weak. These are briefly reviewed, and a new hypothesis is proposed. We suggest that the appearance of the juvenile human hymen is based on 'premature' birth, following which infant helplessness and a subsequent advantage for vaginal protection from external sources of infection allowed natural selection to increase its persistence well into juvenile life.

Embryonic and Fetal Development↗

PubMed1977

Sea urchin recruitment patterns and implications of commercial fishing.

Coexisting sea urchins Strongylocentrotus purpuratus and S. franciscanus exhibit different recruitment patterns. Juveniles of the former species are found in a variety of habitats, whereas juveniles of the latter occur almost exclusively under the spine canopy of conspecific adults. The commercial harvest of S. franciscanus thus seems to affect nursery grounds as well as the reproductive potential of exploited populations.

Animals↗