Life cycle abbreviation in the trematode Coitocaecum parvum: can parasites adjust to variable conditions?
نویسندگان
چکیده
منابع مشابه
Life cycle abbreviation in the trematode Coitocaecum parvum: can parasites adjust to variable conditions?
The complex life cycles of parasites are thought to have evolved from simple one-host cycles by incorporating new hosts. Nevertheless, complex developmental routes present parasites with a sequence of highly unlikely transmission events in order to complete their life cycles. Some trematodes like Coitocaecum parvum use facultative life cycle abbreviation to counter the odds of trophic transmiss...
متن کاملLife cycle abbreviation in trematode parasites and the developmental time hypothesis: is the clock ticking?
The typical multi-host life cycle of many parasites, although conferring several advantages, presents the parasites with a highly hazardous transmission route. As a consequence, parasites have evolved various adaptations increasing their chances of transmission between the different hosts of the life cycle. Some trematode species like the opecoelid Coitocaecum parvum have adopted a more drastic...
متن کاملMicrosatellite loci for the progenetic trematode, Coitocaecum parvum (Opecoelidae)
Nine polymorphic microsatellite loci were characterized from the freshwater trematode Coitocaecum parvum . This parasite can either reproduce sexually in the definitive host or produce eggs by selfing inside its second intermediate host. Two to 11 alleles per locus were detected in 24 trematode sporocysts and observed heterozygosities ranged from 0.04 to 0.96. These loci will be useful for iden...
متن کاملLack of seasonal variation in the life-history strategies of the trematode Coitocaecum parvum: no apparent environmental effect.
Parasites with complex life cycles have developed numerous and very diverse adaptations to increase the likelihood of completing this cycle. For example, some parasites can abbreviate their life cycles by skipping the definitive host and reproducing inside their intermediate host. The resulting shorter life cycle is clearly advantageous when definitive hosts are absent or rare. In species where...
متن کاملAlternative reproductive strategies in the progenetic trematode Coitocaecum parvum: comparison of selfing and mating worms.
The progenetic opecoelid trematode Coitocaecum parvum can reproduce either precociously by selfing in its second intermediate amphipod host or by mating in its normal definitive fish host. In this study, we describe and compare the infection parameters and some life history traits of both egg-producing worms and non-egg producing worms in both their second intermediate and definitive hosts. We ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Evolutionary Biology
سال: 2007
ISSN: 1010-061X,1420-9101
DOI: 10.1111/j.1420-9101.2006.01277.x