Dataset: Barnacle larval supply and settlement 2014-2015

To compare larval supply and settlement, we established 8 locations within our study site where larval supply and settlement were concurrently measured each day during the spring-summer 2014 and 2015. We deployed 6 cylindrical PVC larval traps during the lowest low tide at locations approximately 0.66 to 12.6 m west from each settlement location to measure Chthamalus fissus barnacle larval supply. Traps measured 18.2 cm high by 8.7 cm in diameter and the interior consisted of a segmented funnel that emptied into a 100 µm mesh collection net. 

Daily settlement was measured by deploying settlement plates on rocks adjacent to larval traps during the lowest low tide (with the distances between described above). The tops of the larval traps and center line of the settlement plates were deployed at approximately the same elevation (average elevation of all traps and plates was 0.4 m relative to mean lower low water (MLLW), with a range of 0.3 m to 0.5 m relative to MLLW). Settlement rate, the number of individuals per cm2 per day was measured using PVC settlement plates with three grooves that provided 1.9 cm2 (each ~95 mm long, 6 mm wide, 1 mm high).

Larval supply and settlement collections and comparisons are also described in Hargenrader, C. S. (2018).