caa a22 4500 388112751 CHVBK 20180307125357.0 cr unu---uuuuu 161130e199904 xx s 000 0 eng 10.1017/S0022149X99000542 doi S0022149X99000542 pii (NATIONALLICENCE)cambridge-10.1017/S0022149X99000542 Nollen P.M. Department of Biological Sciences, Western Illinois University, Macomb, IL, 61455, USA Mating behaviour of Echinostoma trivolvis and E. paraensei in concurrent infections in hamsters [Elektronische Daten] [P.M. Nollen] Young adults of Echinostoma trivolvis and E. paraensei were recovered from hamsters previously infected with metacercarial cysts. Some worms of each species were exposed for 1 h to 3-H-tyrosine to label sperm and transplanted singly to uninfected hamsters with several unlabelled worms of the same or opposite species or both species. After 5 days, recovered worms were processed for paraffin sectioning and autoradiography. The resulting slides were observed for the location of radioactive sperm in the seminal receptacles of donor (labelled) and recipient (unlabelled) worms. When E. trivolvis was the donor with the recipient E. paraensei, self-insemination took place, but only one interspecies mating occurred out of 72 possible recipient worms. When E. paraensei served as the donor, self-insemination again occurred, but no cross-insemination was observed among the 59 E. trivolvis recipient worms. When single donor worms had a choice of either species of recipient worms, no interspecies mating took place, but both self- and cross-insemination occurred in the normal, unrestricted behaviour found in single species mating studies. Rates of both self- and cross-insemination were higher in concurrent infections of both recipient species than in single species mating studies. After transplant, both species localized in their natural habitat within the small intestine, with 1/3 overlapping in the duodenum, making interspecies mating a possibility. The correlation between mating and electrophoretic studies on the genetic relationship between 37-collar-spined echinostomes is discussed. Cambridge University Press Journal of Helminthology Cambridge University Press 73/4(1999-04), 329-332 0022-149X 73:4<329 1999 73 JHL https://doi.org/10.1017/S0022149X99000542 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022149X99000542 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Nollen P.M. Department of Biological Sciences, Western Illinois University, Macomb, IL, 61455, USA NATIONALLICENCE 773 0- Journal of Helminthology Cambridge University Press 73/4(1999-04), 329-332 0022-149X 73:4<329 1999 73 JHL CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge