View full-textĬichlid fishes are famous for large, diverse and replicated adaptive radiations in the Great Lakes of East Africa. Worms appear to be recruited in the summer, develop and mature through the winter, and reproduce sexually in late winter and spring. Differential exposure to parasites and host susceptibility may explain the marked variation in parasite abundance among cichlid hosts. In addition, significant variation in parasite burden was detected between sampling locations, but host gender and weight did not explain significant variation in the numbers of A. Nevertheless, significant variation in parasite load was detected between sympatrically occurring rock-dwelling (mbuna) cichlids, with Pseudotropheus zebra (Boulenger) showing the most heavy infections. The parasite manages to infect its cichlid hosts, despite their distinct trophic specializations. tilapiae was observed in all host species analyzed. Tropheops microstoma (Trewavas), and Rhamphochromis sp. New host records are noted in 5 species, Labeotropheus trewavasae (Fryer), Melanochromis vermivorus (Trewavas), Nimbochromis polystigma (Regan). View full-textĪbout 2,000 specimens of the quadrigyrid acanthocephalan Acanthogyrus (Acanthosentis) tilapiae (Baylis, 1948) were collected from 9 species of cichlid fish hosts (Cichlidae: Perciformes) in 7 different sites in Lake Malawi, Africa, during September 2005. Cuckoo catfish and mouthbrooding cichlids provide a model system for testing brood parasitism in a laboratory setting. Parasitism rates and number of catfish per brood were the highest in the albino morphotype suggesting that the higher levels of parasitism may be related to lower aggressive behavior, lower visual acuity, or captive influence. We also analyzed the parasitism rate of the albino morph of Metriaclima zebra, a domestic strain. horei parasitism frequency and number of cuckoo catfish per brood. Our results are comparable to findings from the field for C. The number of catfish eggs per parasitized brood was similar between C. horei may be due to differences in the mating ritual, oviposition (e.g., long periods of pseudo-spawning before actual oviposition), and behavioral adaptations (e.g., increased aggression towards the cuckoo catfish). horei was parasitized significantly less (17%) than the allopatric species Haplochromis latifasciatus, Haplochromis nubilus, and Metriaclima estherae (combined parasitism rate of 28%). Tanganyika and three species from Lake Malawi and the greater Lake Victorian system in a laboratory setting. Here we examine the frequency of parasitism by the cuckoo catfish of Ctenochromis horei from Lake. The cuckoo catfish parasitizes Tanganyikan mouthbrooding cichlids, and under captive conditions, will also parasitize cichlids from other Rift Valley lakes. The only known non-avian vertebrate obligate brood parasite is the cuckoo catfish (Synodontis multipunctatus), a Lake Tanganyikan endemic. Here we examine the frequency of parasitism by the cuckoo catfish of Ctenochromis horei from Lake Tanganyika and three species from Lake Malawi and the greater Lake Victorian system in a laboratory setting.
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