In these studies, the biomass for different fishing zones was estimated using the samples obtained by scraping the rocky surface within quadrats
A comparison of the effectiveness of timed searches vs quadrat
sampling in mussel surveys.
tumidifructa) were present in 2015 only, in quadrats
which were inundated during the environmental watering event, suggesting they may have germinated in response to increased soil moisture resulting from inundation.
and the small plankton net influenced the presence of zeros in the data to a larger extent than that of the aquarium net.
There were significant differences between the mean light levels and quadrat
gratilla found on the third quadrats
and the equivalent density are summarized in Table 1.
Considering the quadrat
sampling method (QuS), we distributed the quadrats
arbitrarily, always respecting the limits defined for each base, independently of the substrates.
As for the quadrat
method, linear extents of suitable, mostly dead substrate (including that inhabited by the sponge), live surface cover, sand, and mud were noted for the intercepts (Fig.
Slope (S): Slope is measured in five 1 m A- 1m quadrats
slope by declinator and the average value is used.
1 m depth in the center of each quadrat
in all sampling units.
The representation of the number of alien taxa per quadrat
using colour coding (Mitchell, 1999) and subsequent comparison of all quadrats
under study were done with GIS software ArcView 9.
The density which denoted total number of individuals per quadrat