Density of spiders (Araneae: Ctenidae) in Ivory Coast rainforests. Jocqué, R., Samu, F., & Bird, T. Journal of Zoology, 266:105–110, National Museum of Namibia, P.O. Box 1203, Windhoek, Namibia, 2005. abstract bibtex To monitor the biodiversity quality of rainforest fragments in the eastern region of the Ivory Coast, the density of at least one important invertebrate group needs to be determined. This has been possible for nocturnal hunting spiders from the family Ctenidae using a novel combination of sampling and census techniques. The reflective characteristics of the eyes of these spiders meant that individuals were readily located using headlamps. Collections were made along transects (total length 5.5 km), adopting a distance sampling protocol. Density was estimated using distance sampling models. More than 2600 ctenids (15 species) were captured and identified. Seven of these species were present in sufficient numbers for density assessment. The combined density of these seven most common species in degraded forest fragments (0.124 m -2) was only half that in less disturbed forest (0.240 m -2). Ctenidae are a promising candidate for future monitoring of invertebrate groups in the rainforest. © 2005 The Zoological Society of London.
@Article{Jocque2005,
author = {Jocqu{\'e}, R. and Samu, F. and Bird, T.},
title = {Density of spiders (Araneae: Ctenidae) in Ivory Coast rainforests},
journal = {Journal of Zoology},
year = {2005},
volume = {266},
pages = {105--110},
abstract = {To monitor the biodiversity quality of rainforest fragments in the
eastern region of the Ivory Coast, the density of at least one important
invertebrate group needs to be determined. This has been possible
for nocturnal hunting spiders from the family Ctenidae using a novel
combination of sampling and census techniques. The reflective characteristics
of the eyes of these spiders meant that individuals were readily
located using headlamps. Collections were made along transects (total
length 5.5 km), adopting a distance sampling protocol. Density was
estimated using distance sampling models. More than 2600 ctenids
(15 species) were captured and identified. Seven of these species
were present in sufficient numbers for density assessment. The combined
density of these seven most common species in degraded forest fragments
(0.124 m -2) was only half that in less disturbed forest (0.240 m
-2). Ctenidae are a promising candidate for future monitoring of
invertebrate groups in the rainforest. © 2005 The Zoological Society
of London.},
address = {National Museum of Namibia, P.O. Box 1203, Windhoek, Namibia},
comment = {Uses 1 sided transects, and it's not clear that they accounted for
it
Obtains density estimates wich are not proportional to number of observations,
even though the detection function is said to be the same ????
Does not collect distances to uncaptured animals (which was stupid
really... around only 80% g(0))},
file = {Jocqueetal2005.pdf:Jocqueetal2005.pdf:PDF},
keywords = {Ctenidae, Density, Ivory Coast, Rainforest, Spiders},
owner = {eric},
subdatabase = {distance},
timestamp = {2006.11.05},
}
Downloads: 0
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