caa a22 4500 386400466 CHVBK 20180307112156.0 cr unu---uuuuu 161130e198906 xx s 000 0 eng 10.1017/S0031182000061539 doi S0031182000061539 pii (NATIONALLICENCE)cambridge-10.1017/S0031182000061539 Availability of caecal habitat as a density-dependent limit on survivorship of Leptorhynchoides thecatus in green sunfish, Lepomis cyanellus [Elektronische Daten] Distribution of Leptorhynchoides thecatus (Acanthocephala: Rhadinorhynchidae) among the pyloric caeca and the relationship between site and rate of maturation were studied in laboratory infectons of 10, 25 and 40 cystacanths fed to green sunfish, Lepomis cyanellus. After 1 week fish fed at each intensity had significantly different numbers of worms. By the 3rd week post-infection, parasites disappeared from the anterior portion of the intestine. At this time the mean numbers of worms recovered from 25 and 40-cystacanth infections were not significantly different. At the end of the 1st week, the area where caeca join the alimentary tract (between caecal area) and caeca numbered 6 and 7 contained significantly more worms than the other sites. By the 3rd week post-infection only caecum 7 contained significantly more worms, and at 5 weeks there was no significant difference between the number of worms present in any caecum or the between caecal area. Initially worms in the more intense infections matured more slowly, but by the 3rd week post-infection there was no significant difference in the states of maturity. The rate of maturation was not related to the site occupied. Copyright © Cambridge University Press 1989 Leptorhynchoides thecatus nationallicence survivorship nationallicence caecal habitat nationallicence green sunfish nationallicence Lepomis cyanellus nationallicence Ewald Julie A. School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0118 USA Nickol B. B. School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0118 USA Parasitology Cambridge University Press 98/3(1989-06), 447-450 0031-1820 98:3<447 1989 98 PAR https://doi.org/10.1017/S0031182000061539 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0031182000061539 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ewald Julie A. School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0118 USA NATIONALLICENCE 700 1- Nickol B. B. School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0118 USA NATIONALLICENCE 773 0- Parasitology Cambridge University Press 98/3(1989-06), 447-450 0031-1820 98:3<447 1989 98 PAR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge