How do you calculate mosquito larval density?
Larval density was determined by taking the average number of mosquito larvae from the total dips taken at specific habitat. Anopheles larvae were then sorted into early stages (1st and 2nd instars) and late stages (3rd and 4th instars) and counted and recorded.
How do you find the density of a tree?
Multiply the average distance in meters by itself to find the average area each tree takes. Divide 10,000 meters squared by the average tree area to determine the tree density per hectare.
What is density of trees?
Tree density can determine the number of trees in an area. Tree density gives foresters an idea of how closely trees are growing in a given area. This value is always expressed as trees per hectare. The tree density is not an exact number of all of the trees in the region, but it serves as an estimate.
What is the density of trees in a forest?
On average for the 39 ecological units, estimated GLO densities were 165 trees/ha (DBH ‡ 12.7 cm), ranging by ecological unit from 75 to 320 trees/ha (Table 1; Figure 2). In contrast, FIA densities were about 2.3 times greater, averaging 348 trees/ha and ranging by ecological unit from 295 to 395 trees/ha. …
What is the difference between Culex and Anopheles mosquito?
Anopheles can be distinguished from Culex by observing their resting posture and wings. Anopheles rests with its body and proboscis making an angle to the surface while Culex rests with its body parallel to the surface but proboscis making an angle to the surface. Rest with body at an angle to the surface.
How do you distinguish Anopheles Culex and Aedes?
The key difference between Aedes Anopheles and Culex mosquito is that Aedes is the insect vector that spreads dengue fever, whereas Anopheles is the insect vector that spreads malaria fever, and Culex is the insect vector that spreads Japanese encephalitis. Mosquitoes are harmful insects.
How is stand density calculated?
Calculating stand density index Plotting the logarithm of the number of trees per acre against the logarithm of the quadratic mean diameter (or the dbh of the tree of average basal area) of maximally stocked stands generally results in a straight-line relationship.
How do you find the density of a tree in a plot?
Additionally, remember to divide the total number of individuals by the total sample plots, what you get is density /Ha. If you do not divide the number of stems of each species, what you get will be density of the particular species in all plots.
How is forest density calculated?
To calculate the QSD, first divide the basal area of the diameter class by the number of trees in the class to find the basal area of the average tree. Then the dbh = 2 x {square root (basal area/3.142)}. For example, the dbh of a tree of basal area of 707 cm2 = 2 x {square root (707/3.142)} = 30 cm.
How Aedes mosquito is different from Anopheles?
The main difference between Aedes and Anopheles mosquito is that Aedes mosquito serves an intermediate host for dengue, yellow fever, chikungunya, etc. Furthermore, Aedes mosquito is an aggressive day biter while Anopheles mosquito is most active at dawn and dusk as well as during the night.