Sharks don't respect boundaries -- dashed, dotted, disputed, or otherwise. Wonder if authors sacrificed the validity of the study for the sake of conducting it along the periphery of the Chinese claim?
Marine biology and international politics converge in the South China Sea. Researchers from China’s State Oceanic Administration study shark populations along the southern edge of the “nine-dash line.” Dots indicate location of PRC surveys. Source: Marine Fisheries (Jan. 2018)