Common names from other countries
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Thuộc về nước lợ; Mức độ sâu 0 - 50 m (Ref. 343). Tropical; 26°C - 30°C (Ref. 111153), preferred 25°C (Ref. 107945); 34°N - 37°S, 22°E - 134°W
Indo-West Pacific. Introduced in Hawaii and USA.
Length at first maturity / Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm 6.9, range 8 - ? cm Max length : 28.0 cm CW con đực/không giới tính; (Ref. 343); Khối lượng cực đại được công bố: 3.0 kg (Ref. 343)
Carapace smooth, with strong transverse ridges; H-shaped gastric groove deep; relatively broad frontal lobes, all more or less in line with each other; broad anterolateral teeth, projecting obliquely outwards. Well-developed present on outer surface of chelipedal carpus and anterior and posterior dorsal parts of the palm. Color: carapace green to almost black; legs may be marbled.
Maximum carapace width: between 25 and 28 cm. Maximum weight between 2 and 3 kg. Also collected by baited wire mesh pots. Sold in Taiwan, Hong Kong and Singapore, where the large crabs (so called "meat crabs") and females with ripe ovaries ("roe crabs") command a price from US$5 to US$10 per kg. Largest exporters of this species are Indonesia, Sri Lanka, India, and Bangladesh. There have been attempts to culture the crabs in captivity, but none of the closed-cycle enterprise have gone commercial. Tide is relied upon by farms to bring megalopae or late zoeae into grow-out ponds. Prefers oceanic waters, usually found just offshore on soft muddy bottoms (Also Ref. 9773). Can be caught up to 50 m offshore as it migrates offshore to spawn (Ref. 343). Subtidal (Ref. 106854). Digs deep burrows in mangroves and soft substrates in shallow or intertidal waters (Refs. 343, 9773). Found in brackish to sea water (Ref. 77016). Forages at night. Major predator (Also Ref. 128960) of small invertebrates colonizing mangrove swamps (Ref. 8752). Feeds on shrimps, crabs, fishes, and bivalves (Refs. 99886, 102679). Benthic scavenger but prefers oysters (Ref. 9773).
Gonochoric; sexually dimorphic based on secondary characteristics. The male traps the female under its chest, holding the latter with its chelipers, forming a pair. When the female is about to molt, the male releases but remains nearby. After moulting, the female is again trapped by the male and the latter opens its genitals towards the female's abdomen. Coupling may last from seven to twelve hours (Ref. 99880) and occurs at the bottom of the burrows; spawning occurs five weeks after mating. Migration: young crabs (2 cm CL) attend to estuarine waters and leave to enter the mangroves at lengths 7-9 cm for males and 8 cm for females; after which they return to the sea (Ref. 99886).
Ng, P.K.L. 1998. (Ref. 343)
IUCN Red List Status (Ref. 130435)
CITES status (Ref. 108899)
Not Evaluated
Not Evaluated
Human uses
Các nghề cá: Tính thương mại
FAO - Nuôi trồng thủy sản: Sản xuất, species profile; Các nghề cá: landings, species profile | FishSource | Biển chung quanh ta
Các công cụ
Các nguồn internet
Estimates based on models
Preferred temperature
(Ref.
115969): 24.5 - 29.1, mean 28.1 (based on 1290 cells).
Thích nghi nhanh
Chiêù cao, thời gian nhân đôi của chủng quần tối thiểu là dưới 15 tháng (K=0.43).
Prior r = 1.17, 95% CL = 0.77 - 1.75, Based on 3 data-limited stock assessments.
Vulnerability
Low vulnerability (18 of 100).
