•iiEBi
Study:
• extensive - large area will be sampled once —> faunistic survey
• intensive - repeated observation of area —> ecological survey
Timing of sampling:
• depends on phenology
Size of sampled area:
• large for rare, small for abundant species
Population estimates:
• absolute - density per unit ar
• relative - catch per unit time
•s
100 90 80 70 60 50 40 30 20 10 0
Pseudoscorpione Araneae
Acan, Lmyphiidae
Opihones Araneidae
J																												
	"""										D Adult D Juvenile																	
																												
																												
												-																
																												
																												
																												
Mar Apr May Jun  Jul  Aug Sep   Oct
Hand sampling
• to sample arachnids under stones, from cracks, on bark, on rocks, in caves, on walls
• using pooter (aspirator), brush, pincer, tube or a suction gun
• traps collect continuously
• cheap, low effort
• activity depends on sex, circadian activity, weather, reproduction, dispersal
• arranged in a grid or in a row
• with exclusion barriers
• diameter of the trap selects captured individuals
• efficiency 0-40 %
• with timing device
Photoeclector

to sample arachnids from low vegetation muslim-covered tent
Dry sievin
to sample arachnids in litter using a sieve and a cloth or tray
Specimen transport
Dead specimens
• put in ependorf tubes, plastic tubes, filled with ethanol
• live are put in plastic tubes with piece of grass, leaf, moistened cloth with rubber or foam stop
Labelling
• labelled using permanent ink-pen
• use pencil on labels of tubes with ethanol
Transport
• in the plane, bus, car, train
• put in plastic bag to keep humidity and at cold place
Storage
Labels
• locality, GPS coordinates, habitat, date, hour (?), collector (leg.), identified (det.)
• print on cardboard paper using inkjet printer or write with a pencil or black-ink
Database
• Excel, Access, faunistic software (Fauna 2000)
Identification
• Klíč zvířeny ČSSR IV
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singly in tubes with a layer of Paris of plaster labelled on outside with permanent ink-pen moistened regularly (3-5 days) with drops of water foam rubber stop or pierced plastic plug fed with prey in regular intervals
• kept clean (without prey remnants) to avoid attack by fungi and parasitic mites