Profile updated on 15 October 2018
Mola rock crab, Jaiba marmola
Mola rock crab distributes from Arica region to Magellan Strait in Chile (Aedo et al. 2009) (Martinez 1986 in (Pardo et al. 2017)) and to the Beagle Channel (Vinuesa et al. 1999), from intertidal to 42 (Henriquez y Bahamonde, 1976 in (Pardo et al. 2017)) or to 130 m deep (Campos, 1992 in (Pardo et al. 2017)). Genetic variation in individuals over 300 km apart has shown no significant variances, even when there are oceanographic conditions that difficult the process of larval transport, these conditions were not an obstacle for M. edwardsii (Rojas-Hernandez et al. 2014). The population structure is unknown.
Traditionally, this species has been englobed in a pool species called “jaibas” (crabs) for Chilean administration and fishermen, and it was not until the 90s that it was considered as a single resource in administration records (Yañez et al. 2015), accounting for a source of uncertainty in previous years.
Ancud bay catches added up to 81% of total catches in the X region, in 2014. Given this and that oceanographic conditions allow this unit to be considered as discrete and as representative of the X region, a unique profile was assumed for this unit. Two assessments were conducted in 2015 and 2017. Nevertheless, further assessments focused on the VIII, X and XI regions, where most landings occurred (Pool et al. 1998)(Olguin et al. 2006), one was performed for the entire country (Aedo et al. 2009) and one was focused on the V-X regions (Pardo et al. 2017).