April 30, 2021 — The following was released by NOAA Fisheries:
Snappers are economically important species for fisheries worldwide. To determine the health of snapper populations, we must monitor their abundance and record any changes in their biomass. NOAA scientists conducted a study to test new, more efficient and accurate methods to regularly monitor snapper in the Hawaii bottomfish fishing grounds. The results of this study were recently published in the ICES Journal of Marine Science.
Snappers are abundant in nearshore, 100–400-meter deep subtropical and tropical oceans with rocky, uneven bottoms that have steep slopes. They typically occupy areas near the ocean floor but are also found further in the water column and within crevices or under outcrops.
Modern research methods limit accurate and efficient abundance estimations for these species. Trawl sampling is not feasible as the highly uneven, rocky bottom would damage the net and the fragile habitat itself could be disturbed. More recent underwater video observations are limited by light and field-of-view distance. Placing video cameras in the water can also scare away or attract fish, skewing the results.