Land-loving crabs

DNA or loving care?

to five contestants might be involved in child-custody conflicts. As cases of ART in which third parties are involved become more common, the issue of what constitutes a parent is now, perhaps more than ever, highly contested. There is no consensus on what parents are or what they should be. At the heart of the issue are at least two important questions. First, what is the relative importance a...

The ethics of loving care.

A novel running wheel apparatus to monitor locomotor rhythms in land crabs

Dry season distribution of land crabs, Gecarcinus quadratus (Crustacea: Gecarcinidae), in Corcovado National Park, Costa Rica.

The land crab Gecarcinus quadratus is an engineering species that controls nutrient cycling in tropical forests. Factors regulating their coastal distribution are not fully understood. We quantified land crab distribution during the dry season at Sirena Field Station in Corcovado National Park, Costa Rica, and found that land crab burrow density decreases with increasing distance from the ocean...

Aerial Gas Exchange in Australian Freshwater/land Crabs of the Genus Holthuisana

Holthuisana valentula Riek and H. agassizi (Rathbun) both ventilate their lungs by lateral oscillations of the thoracic walls within the branchial chambers. Air enters and leaves the lungs via the prebranchial apertures and the Milne-Edwards apertures. At rest, active ventilation in H. transversa was low (0-95 mlg~^ h") and a high diffusional component was evident. After disturbance, VA rose to...