[Cnidaria] Gelatinou zoopplankton collection

[Breitburg, Denise]

Hello-
If a 1 m2 net would be sufficient (especially in your shallower sites) you might try our approach. We attachached a metal frame with 30 cm diam wheels to the bottom of a 1 m2 tucker trawl (280 um mesh) so we could get very close to the bottom without getting a net filled with mud. If this would work for you, I could send a photo. 
good luck-
Denise

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From: cnidaria-bounces at uci.edu on behalf of P.Ezhilarasan
Sent: Tue 7/7/2009 8:27 AM
To: cnidaria at uci.edu
Subject: [Cnidaria] Gelatinou zoopplankton collection


 

Dear,

Gelatinous zooplankton vertical hauls are made with a MPN (Multi Plankton Net) 25m2 diameter, 300 mm mesh aperture 

Gelatinous zooplankton contain so many groups (Scyphomedusae, hydromedusae, Siphonophores ,Ctenophore, Pelagic polychaete, Thaliacean Fish egg and larvae etc .......)

Bud incase of Syphomedusae collection, This large size plankton may damage the net or sometime misleads the abundance patterns of other gelatinous zooplankton which entangled with these scyphomedusae, hence they were studied by direct observation and the specimens were caught by scoop net or bucket. So assessing the abundance patterns of these groups (Scyphomedusae) by specially designed net or also by fishing net operations may be suitable.


P.Ezhilarasan
 
Research scholar
Centre of Advanced Study in Marine Biology
Annamalai University
Parangipettai - 608 502
Tamil Nadu, SouthIndia 
Email - ezhil_pathy at yahoo.co.in

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