This method of population estimation would be more accurate in a lake setting as the fish would all stay at the same place all the time so it's easier to keep a control of the population.
Explanation:
The mark and recapture method is a population size estimation technique where a portion of the population is marked and released, and then a second portion is captured to count how many of the previously marked individuals is found in order to determinate an estimate of the total size of the population. Doing this on a stream or river would present several complications, as the individuals are constantly moving ahead down the river and travel very long distances, so the probability of recapturing a previously marked individual is very slim. Whereas in a lake, all the population of fish would stay in the same area all the time, making this method very practical to estimate the total population.
volcanoes most common in subduction zones between oceanic and continental plates
Explanation:
Plate boundaries are share and thin sheets of slabs over the surface of the earth and these boundaries are demarcated by the ridges and trenches and interplate margins as the plate tends to move in the opposite direction to the forces of friction and the pushing and pulling nature of the rock from the mantle below crates a dynamic force that created most volcanoes.
The impact of these zones like the fault line and the lines that divide the plate margins tends to fall into a deep zone full of trenches and cavities that leads to the burning of the plate matter and the rising current then pushes this upwards and hence result is volcanic eruption due to the heat and pressure build inside.
La Nina is a combination of oceanic and atmospheric circulation weather pattern that develops into the formation of southern oscillation system of the ENSO cycle and is a comparatively cooler system that its counterpart the El Nino meaning the little boy.
During the period of La Nina, the temperature of the pacific ocean will be normally less than 3 to 5 degrees at least for five months. Thus there are wetter conditions in Indonesia and northern brazil. In North America, this weather phenomenon brings increased rainfall across the upper middle west.
As due to this phenomenon of the La Nina can result in an intense storm in certain places and drought conditions in others as these are associated with synoptic conditions.
Due to La Nina caused catastrophic rainfall in andes it directly impacts the conditions of the Peruvian coasts and hence drought in these areas which sets the conditions of El Nino.
