Estimated Size at Sexual Maturity for Female Mud Crabs (Genus Scylla) from Two Sympatric Species within Ban Don Bay, Thailand

Size at Maturity and Fecundity of Rock Crabs, Cancer Irroratus, from the Bay of Fundy and Southwestern Nova Scotia

Rock crabs, Cancer irroratus, were collected from lobster traps, trawls, and by divers in the Bay ofFundy and southwestern Nova Scotia, 1980-81. Estimates of maturity were similar using gonad examination, measurements of chela height, and abdominal width/carapace width ratios. The carapace width (CW) at which 50% of male and female rock crabs were mature was estimated to be 62 and 49 mm, wherea...

Heavy metal levels in mud crabs (Scylla spp.) from East Bataan Coast.

Heavy metal levels (Pb and Cu) on adult mud crabs (Scylla spp.) from the East Bataan Coast were determined. Muscle tissue from each crab was processed through nitric acid digestion and analyzed using atomic absorption spectroscopy. The average concentrations in the samples were 3.37 × 10(-3) and 1.01 mg/L-both within WHO acceptable limits. These were contrasted with the levels found in sediment...

Infestation of parasitic rhizocephalan barnacles Sacculina beauforti (Cirripedia, Rhizocephala) in edible mud crab, Scylla olivacea

Screening of mud crab genus Scylla was conducted in four locations (Marudu Bay, Lundu, Taiping, Setiu) representing Malaysia. Scylla olivacea with abnormal primary and secondary sexual characters were prevalent (approximately 42.27% of the local screened S. olivacea population) in Marudu Bay, Sabah. A total of six different types of abnormalities were described. Crabs with type 1 and type 3 wer...

Habitat selectivity of megalopae and juvenile mud crabs (Scylla serrata): implications for recruitment mechanism

Megalopae of several crab species exhibit active habitat selection when settling. These megalopae usually select structurally complex habitats which can provide refuge and food. The portunid mud crab, Scylla serrata, is commonly found within the muddy estuaries of the Indo-West Pacific after attaining a carapace width > 40 mm. Despite substantial efforts, the recruitment mechanism of juvenile m...

Land use/land cover changes in the coastal zone of Ban Don Bay, Thailand using Landsat 5 TM data