Size estimate of a local population of Brychius hungerfordi (Coleoptera: Haliplidae)

Size estimate of a local population of Brychius hungerfordi (Coleoptera: Haliplidae)

Much of the natural history of the endangered crawling water beetle, Brychius hungerfordi, is unknown. Population estimates have only been surmised. We have measured, using a mark and recapture technique, a localized population of the beetle in a pool on the East Branch of the Maple River, Emmet Cou...

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Veröffentlicht in:Great Lakes entomologist 2002-03, Vol.35 (1), p.23-26
Hauptverfasser: Grant, M, Scholtens, B, Vande Kopple, R, Ebbers, B
Format: Artikel
Sprache:eng
Schlagworte:
aquatic insects
endangered species
estimation
Haliplidae
mark-recapture technique
population size
sampling
seasonal variation
temporal variation
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Zusammenfassung:Much of the natural history of the endangered crawling water beetle, Brychius hungerfordi, is unknown. Population estimates have only been surmised. We have measured, using a mark and recapture technique, a localized population of the beetle in a pool on the East Branch of the Maple River, Emmet County, Michigan. The average population during July 2001 was found to be 1052 individuals with a range of 43 (highest estimate - lowest estimate). A three-year study of the relative abundance of the beetle in the same pool suggests that the population has remained relatively constant.
ISSN:0090-0222