Host-parasite interactions between the cysticercoid larvae of the cestode Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca

This study examined host-parasite relations between cysticercoids of Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca throughout the latter's life history. There was a significant positive relationship in oncosphere consumption, parasite loads, and short-term surviva...

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Main Author: Kokkotis, Athanasios Tom
Format: Others
Published: 1998
Online Access:http://spectrum.library.concordia.ca/571/1/MQ39457.pdf
Kokkotis, Athanasios Tom <http://spectrum.library.concordia.ca/view/creators/Kokkotis=3AAthanasios_Tom=3A=3A.html> (1998) Host-parasite interactions between the cysticercoid larvae of the cestode Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca. Masters thesis, Concordia University.
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spelling ndltd-LACETR-oai-collectionscanada.gc.ca-QMG.5712013-10-22T03:41:03Z Host-parasite interactions between the cysticercoid larvae of the cestode Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca Kokkotis, Athanasios Tom This study examined host-parasite relations between cysticercoids of Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca throughout the latter's life history. There was a significant positive relationship in oncosphere consumption, parasite loads, and short-term survival in amphipods exposed during Instars 1, 2, 3, 4, 6, 8 and 9. Oncosphere consumption, short-term survival, and intensity of infection were generally similar among older amphipods. No correlation was found between oncosphere consumption and cysticercoid levels in any instar. Infected amphipods moulted less frequently than controls regardless of the instar at exposure. No differences were found in oncosphere consumption, short- or long-term survival, moult frequency, or intensity of infection among males and females. Infection during Instar 4 (i.e. prior to sexual development) had significant negative effects on reproduction. In pairing experiments, uninfected male H. azteca never paired with infected females. Infected male H. azteca paired with uninfected females, but less frequently than uninfected males. Overall, infections had a significant negative effect on short-term survival of young H. azteca, on the long-term survival of H. azteca infected during Instar 4, and on the number of moults over a 14 day period in H. azteca of all ages. Fecundity was markedly reduced in females infected before sexual maturity and uninfected males did not pair with infected females. The few infected males that paired suggests that they may be at a reproductive disadvantage relative to uninfected males. (Abstract shortened by UMI.) 1998 Thesis NonPeerReviewed application/pdf http://spectrum.library.concordia.ca/571/1/MQ39457.pdf Kokkotis, Athanasios Tom <http://spectrum.library.concordia.ca/view/creators/Kokkotis=3AAthanasios_Tom=3A=3A.html> (1998) Host-parasite interactions between the cysticercoid larvae of the cestode Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca. Masters thesis, Concordia University. http://spectrum.library.concordia.ca/571/
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description This study examined host-parasite relations between cysticercoids of Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca throughout the latter's life history. There was a significant positive relationship in oncosphere consumption, parasite loads, and short-term survival in amphipods exposed during Instars 1, 2, 3, 4, 6, 8 and 9. Oncosphere consumption, short-term survival, and intensity of infection were generally similar among older amphipods. No correlation was found between oncosphere consumption and cysticercoid levels in any instar. Infected amphipods moulted less frequently than controls regardless of the instar at exposure. No differences were found in oncosphere consumption, short- or long-term survival, moult frequency, or intensity of infection among males and females. Infection during Instar 4 (i.e. prior to sexual development) had significant negative effects on reproduction. In pairing experiments, uninfected male H. azteca never paired with infected females. Infected male H. azteca paired with uninfected females, but less frequently than uninfected males. Overall, infections had a significant negative effect on short-term survival of young H. azteca, on the long-term survival of H. azteca infected during Instar 4, and on the number of moults over a 14 day period in H. azteca of all ages. Fecundity was markedly reduced in females infected before sexual maturity and uninfected males did not pair with infected females. The few infected males that paired suggests that they may be at a reproductive disadvantage relative to uninfected males. (Abstract shortened by UMI.)
author Kokkotis, Athanasios Tom
spellingShingle Kokkotis, Athanasios Tom
Host-parasite interactions between the cysticercoid larvae of the cestode Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca
author_facet Kokkotis, Athanasios Tom
author_sort Kokkotis, Athanasios Tom
title Host-parasite interactions between the cysticercoid larvae of the cestode Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca
title_short Host-parasite interactions between the cysticercoid larvae of the cestode Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca
title_full Host-parasite interactions between the cysticercoid larvae of the cestode Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca
title_fullStr Host-parasite interactions between the cysticercoid larvae of the cestode Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca
title_full_unstemmed Host-parasite interactions between the cysticercoid larvae of the cestode Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca
title_sort host-parasite interactions between the cysticercoid larvae of the cestode microsomacanthus hopkinsi and the amphipod intermediate host hyalella azteca
publishDate 1998
url http://spectrum.library.concordia.ca/571/1/MQ39457.pdf
Kokkotis, Athanasios Tom <http://spectrum.library.concordia.ca/view/creators/Kokkotis=3AAthanasios_Tom=3A=3A.html> (1998) Host-parasite interactions between the cysticercoid larvae of the cestode Microsomacanthus hopkinsi and the amphipod intermediate host Hyalella azteca. Masters thesis, Concordia University.
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