Dynamics of Dungeness crab, Cancer magister
, larvae off central and northern California.
Here, 10 microsatellite loci were used to examine connectivity among Oregon Dungeness crabs (Cancer magister
, Dana, 1852) in the California Current System (CCS) (n = 801) as well as between Oregon and two British Columbia populations, Alison Sound (n = 54) and Boundary Bay (n = 48).
Se han encontrado correlaciones entre el estres del viento con las fluctuaciones en las tasas de asentamiento en Carcinus maenas (Queiroga et al., 2006), Cancer magister
(Miller & Shanks, 2004), Callinectes sapidus (Rabelais et al., 1995) y Panulirus argus (Eggleston et al., 1998).
, experiences low oxygen levels in estuaries and muddy bays, and encounters episodic hypoxia offshore due to upwelling events along the Pacific west coast (Grantham et at, 2004; Chan et al., 2008; Turner et al., 2008).
Studies have shown that interactions among conspecifics negatively affect portunid crabs and American lobster (Homarus americanus) catch rates (Williams and Hill, 1982; Jury et al., 2001), and Miller (1974) showed that catch rates of Dungeness crab (Cancer magister
) decreased with increasing pot density.
Although the growth and longevity for the more commercially valuable Dungeness crab Cancer magister
(Dana, 1852) (Pauley et al.
Box-Cox transformations successfully normalized the density data for all of the taxa we compared statistically, with the exception of Dungeness crab (Cancer magister
) and hagfish, as well as for the physical features we enumerated (trawl tracks and hagfish burrows).
Predation trials were run using five separate predators: (1) zoeae of Cancer magister
, (2) megalopae of Cancer magister
, (3) adults of Sagitta elegans, (4) adults of Boltenia villosa, and (5) postlarvae of Ammodytes hexapterus.
KEY WORDS: Dungeness crab, Cancer magister
, mating, Oregon, fertilization, fishery
(1983) reported that Cancer magister
, a weak osmoregulator, displayed a behavior in which it appeared that the branchial chambers were isolated when crabs were exposed to low salinity.
2005), and population modeling efforts have shown that this form of mortality can affect year-class strength and recruitment in a variety of economically significant species including Dungeness crab (Cancer magister
) (Botsford & Wickham 1978, Eggleston & Armstrong 1995), blue crab (Callinectes sapidus) (Hines et al.
Here we compare the phenoloxidase activities and substrate specificities of proteins that co-occur in the hemolymph of the brachyuran crab Cancer magister
, as a step toward understanding their different roles.