In 1978, the theory behind helminth parasites having the potential to regulate the
abundance of their host populations was formalized based on the understanding that those …

Parasitic worms (ie helminths) commonly infect multiple hosts in succession before
reproducing. At each life cycle step, worms may fail to infect the next host, and this risk …

The acanthocephalan parasite, Corynosoma enhydri, uses sea otters (Enhydra lutris) as
definitive host. Despite high prevalence and abundance in southern sea otters (E. l. nereis) …

The acanthocephalan parasite Acanthocephalus dirus infects the freshwater isopod
Caecidotea intermedius as an intermediate host before completing its life cycle in a fish …

Parasites are important components of food webs. Although their direct effects on hosts are
well-studied, indirect impacts on trophic networks, thus on non-host species, remain unclear …

A positive relationship of body size and sexual size dimorphism (males' size relative to
females), called Rensch's rule, is often observed in comparisons within non-parasitic taxa …

Summary Paragonimus proliferus (P. proliferus), one of 46 Paragonimus species registered
in the National Center for Biotechnology Information database, may be much more widely …

Many trophically-transmitted parasites induce behavioural alteration in their intermediate
hosts that tend to increase host vulnerability to predation. Inter-population variability in …

Larval helminth parasites that share an intermediate host could be subjected to density-
dependent factors, such as crowding effects, as well as demonstrate positive or negative …

When many worms co-infect the same host, their average size is often reduced. This
negative density-dependent growth is called the crowding effect. Crowding has been …