Final answer:
The disadvantages of a continuous line transect include difficulty in obtaining precise and detailed population density estimates, omission errors, and the need for considerable effort and resources.
Step-by-step explanation:
The disadvantages of a continuous line transect include the difficulty of obtaining precise and detailed population density estimates in situations with a large number of species and/or large study areas. This is especially challenging when using basic tools and non-professional personnel. In addition, the use of line transects may result in omission errors due to low sampling density and difficulty in delineating sites. Finally, continuous line transects require considerable effort and resources from project staff and volunteers.