Observations on Giant American Brook Lampreys (Lampetra appendix)

@article{Cochran2008ObservationsOG,
  title={Observations on Giant American Brook Lampreys (Lampetra appendix)},
  author={Philip A. Cochran},
  journal={Journal of Freshwater Ecology},
  year={2008},
  volume={23},
  pages={161 - 164}
}
  • P. Cochran
  • Published 2008
  • Biology
  • Journal of Freshwater Ecology
ABSTRACT The American brook lamprey (Lampetra appendix) does not feed after metamorphosis from the larval stage, and is typically much smaller than lampreys that feed as parasites or predators of other fishes. However, relatively large “giants” have occasionally been reported from Great Lakes tributaries, and one hypothesis is that they have fed parasitically after metamorphosis. I describe here two additional giant specimens from tributaries of Lake Michigan and Lake Huron. The presence of… Expand
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These data, together with the results of morphological analysis as well as data on the distribution, ecology, hybridization, and observations of joint spawning of parasitic and nonparasitic forms, show that these forms belong to the same species. Expand
Early Spawning by the American Brook Lamprey ( Lethenteron appendix ) in Southeastern Minnesota
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Intraspecific Phylogeography of the American Brook Lamprey, Lethenteron appendix (DeKay, 1842)
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The absence of variation among several of the species of Lethenteron suggests a recent origin of multiple non-parasitic species with insufficient time for lineage sorting or ongoing gene flow among populations of a trophically polymorphic species. Expand
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Analysis of videotapes of spawning Lampetra appendix in the North Branch Whitewater River in Minnesota and Jambo Creek in eastern Wisconsin revealed that at both sites at least 50% of matings in nests with at least three lampreys included a satellite male. Expand
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Interspecific sneak male mating tactics between paired lamprey species are described for the first time, suggesting that high levels of gene flow between putative lampreys species could remain high, despite large body size discrepancies. Expand
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TLDR
An in-depth study of large samples of nonparasitic lamprey adults from Japan and Sakhalin Island is needed to determine whether the lower trunk myomere from these areas represent one or more undescribed species, or Le. Expand
Parasitism offers large rewards but carries high risks: Predicting parasitic strategies under different life history conditions in lampreys
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The results suggest that nonparasitic lineages in lampreys are common because parasitism, while offering better growth, also has lower survival, and non parasitic species may be generated at different rates because growth and survival thresholds in the model favouring parasitism are close to observed estimates. Expand
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A morphological and meristic study was made of a population of prespawning American brook lampreys, Lethenteron lamottei, and comparisons were made with published descriptions of other populations ...
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