G. Almany, R. Hamilton, M. Matawai, M. Bode, T. Potuku, P. Saenz-Agudelo, S. Planes, M. Berumen, K. Rhodes, S. Thorrold, G. Russ, G. Jones
Current Biology, 23, pp. 626-630, (2013)
In many tropical nations, fisheries management requires a
community-based approach because small customary marine tenure areas
define the spatial scale of management .
However, the fate of larvae originating from a community’s tenure is
unknown, and thus the degree to which a community can expect their
management actions to replenish the fisheries within their tenure is
unclear . Furthermore, whether and how much larval dispersal links tenure areas can provide a strong basis for cooperative management.
Using genetic parentage analysis, we measured larval dispersal from a
single, managed spawning aggregation of squaretail coral grouper (Plectropomus areolatus)
and determined its contribution to fisheries replenishment within five
community tenure areas up to 33 km from the aggregation at Manus Island,
Papua New Guinea. Within the community tenure area containing the
aggregation, 17%–25% of juveniles were produced by the aggregation. In
four adjacent tenure areas, 6%–17% of juveniles were from the
aggregation. Larval dispersal kernels predict that 50% of larvae settled
within 14 km of the aggregation. These results strongly suggest that
both local and cooperative management actions can provide fisheries
benefits to communities over small spatial scales.