Effects of net, pump and bottle sampling on the abundance estimates of planktonic Rotifera

Eighty-seven freshwater plankton samples collected by means of two different nets, a submersible centrifugal pump and a 5.81 water bottle were compared with respect to their ability to catch the rotifer Keratella cochlearis. Sample size, illumination (day/night), the presence of bridles ahead of the...

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Autores principales:	Boltovskoy, Demetrio, Pedrozo, Fernando Luis, Mazzoni, Horacio Esteban, Díaz, Mónica Mabel
Publicado:	1985
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v7_n2_p295_Boltovskoy http://hdl.handle.net/20.500.12110/paper_01427873_v7_n2_p295_Boltovskoy
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_01427873_v7_n2_p295_Boltovskoy
record_format	dspace
spelling	paper:paper_01427873_v7_n2_p295_Boltovskoy2023-06-08T15:11:38Z Effects of net, pump and bottle sampling on the abundance estimates of planktonic Rotifera Boltovskoy, Demetrio Pedrozo, Fernando Luis Mazzoni, Horacio Esteban Díaz, Mónica Mabel Eighty-seven freshwater plankton samples collected by means of two different nets, a submersible centrifugal pump and a 5.81 water bottle were compared with respect to their ability to catch the rotifer Keratella cochlearis. Sample size, illumination (day/night), the presence of bridles ahead of the net mouths (versus unbridled nets), and different mouth diameters (0.2 and 0.5 m) did not affect abundance estimates. Slight differences were found between the yields of pushed nets versus towed nets; these are probably due to uneven distribution of the animals in the 0-3 m layer. Both pump and bottle volumes strongly affected abundance estimates (K. cochlearisl-1 in pump samples=164.84 volume of water filtered-0 817; K. cochlearisl-1 in bottle samples=84.74+2336.6 volume of water filtered-1) Net sample results were always considerably higher (4.6-12.3 times) than pump and bottle estimates; these differences are most probably due to evading reactions of the rotifer. © 1985 IRL Press Limited. Fil:Boltovskoy, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pedrozo, F.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mazzoni, H.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Díaz, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1985 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v7_n2_p295_Boltovskoy http://hdl.handle.net/20.500.12110/paper_01427873_v7_n2_p295_Boltovskoy
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description	Eighty-seven freshwater plankton samples collected by means of two different nets, a submersible centrifugal pump and a 5.81 water bottle were compared with respect to their ability to catch the rotifer Keratella cochlearis. Sample size, illumination (day/night), the presence of bridles ahead of the net mouths (versus unbridled nets), and different mouth diameters (0.2 and 0.5 m) did not affect abundance estimates. Slight differences were found between the yields of pushed nets versus towed nets; these are probably due to uneven distribution of the animals in the 0-3 m layer. Both pump and bottle volumes strongly affected abundance estimates (K. cochlearisl-1 in pump samples=164.84 volume of water filtered-0 817; K. cochlearisl-1 in bottle samples=84.74+2336.6 volume of water filtered-1) Net sample results were always considerably higher (4.6-12.3 times) than pump and bottle estimates; these differences are most probably due to evading reactions of the rotifer. © 1985 IRL Press Limited.
author	Boltovskoy, Demetrio Pedrozo, Fernando Luis Mazzoni, Horacio Esteban Díaz, Mónica Mabel
spellingShingle	Boltovskoy, Demetrio Pedrozo, Fernando Luis Mazzoni, Horacio Esteban Díaz, Mónica Mabel Effects of net, pump and bottle sampling on the abundance estimates of planktonic Rotifera
author_facet	Boltovskoy, Demetrio Pedrozo, Fernando Luis Mazzoni, Horacio Esteban Díaz, Mónica Mabel
author_sort	Boltovskoy, Demetrio
title	Effects of net, pump and bottle sampling on the abundance estimates of planktonic Rotifera
title_short	Effects of net, pump and bottle sampling on the abundance estimates of planktonic Rotifera
title_full	Effects of net, pump and bottle sampling on the abundance estimates of planktonic Rotifera
title_fullStr	Effects of net, pump and bottle sampling on the abundance estimates of planktonic Rotifera
title_full_unstemmed	Effects of net, pump and bottle sampling on the abundance estimates of planktonic Rotifera
title_sort	effects of net, pump and bottle sampling on the abundance estimates of planktonic rotifera
publishDate	1985
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v7_n2_p295_Boltovskoy http://hdl.handle.net/20.500.12110/paper_01427873_v7_n2_p295_Boltovskoy
work_keys_str_mv	AT boltovskoydemetrio effectsofnetpumpandbottlesamplingontheabundanceestimatesofplanktonicrotifera AT pedrozofernandoluis effectsofnetpumpandbottlesamplingontheabundanceestimatesofplanktonicrotifera AT mazzonihoracioesteban effectsofnetpumpandbottlesamplingontheabundanceestimatesofplanktonicrotifera AT diazmonicamabel effectsofnetpumpandbottlesamplingontheabundanceestimatesofplanktonicrotifera
_version_	1768545137523163136

Effects of net, pump and bottle sampling on the abundance estimates of planktonic Rotifera

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