Malacostraca |
Decapoda |
Cancridae
पर्यावरण: पर्यावरण / जलवायु क्षेत्र / गहराई सीमा / वितरण सीमा
पारिस्थितिकी
Benthic; खारा; गहराई सीमा 0 - 360 m (संदर्भ 865). Temperate; 3°C - 19°C (संदर्भ 104779), preferred 9°C (संदर्भ 107945); 61°N - 23°N, 179°W - 110°W
Eastern Pacific: Aleutian Islands, Alaska to Magdalena Bay, Mexico. Subtropical to boreal.
प्रथम परिपक्वता पर लंबाई / आकार / वज़न / आयु
परिपक्व अवधि: Lm ?, range 10 - ? cm Max length : 22.5 cm CW पुल्लिंग / अलिंग; (संदर्भ 865); 16 cm CW (female); अधिकतम सूचित उम्र: 10 वर्षो (संदर्भ 104779)
Maximum length for females from Ref. 104779. Epibenthic in estuaries and nearshore environments (Ref. 104211). It is found on soft bottoms in very low intertidal areas to a depth of 360 meters (Ref. 865). Found on seagrasses (Refs. 104216, 106869). Juveniles inhabit and forage on estuaries, particularly in oyster reefs, oyster beds (Ref. 104211, 113901), and eelgrass (Ref. 104211).
Life cycle: The fertilized egg hatches into prezoeae larva and molts into zoea an hour after. The larvae undergo five zoeal stages before molting into megalopae. The megalopae molts into juvenile stage before further molting (at most 12 times) into adult stage (Ref. 104779). Mating behavior: Precopulatory courtship ritual is common (through olfactory and tactile cues); usually indirect sperm transfer (Ref. 833). Males locate premolt females through a pheremonal homing system. Male holds the female in an embrace for at most 7 days prior to the female's molting. An hour after molting, copulation occurs through insertion of male gonopods into the spermathecae of the female to deposit sperm (indirect sperm transfer). The female may then be embraced again for 2 days. Pre- and post-mating embraces are done to protect females from predation, aside from insuring mating success. Mating occurs in estuaries but spawning takes place offshore (Ref. 104779). Crabs can store and utilize sperm for at least 2 years. Eggs are fertilized as they pass through the spermathecae during extrusion (Ref. 104787).
Shirley, S.M., T.C. Shirley and S.D. Rice 1987 Latitudinal variation in the Dungeness crab, Cancer magister: zoeal morphology explained by incubation temperature. Mar. Biol. 95(3):371-376. (संदर्भ 8391)
आईयूसीएन रेड लिस्ट स्थिति
(संदर्भ 130435: Version 2025-2 (Global))
CITES स्थिति (संदर्भ 108899)
Not Evaluated
CMS (संदर्भ 116361)
Not Evaluated
मनुष्यों के लिए ख़तरा
मानव उपयोग
मात्स्यिकी: व्यापारिक
FAO - मात्स्यिकी: प्रजातियों की प्रोफ़ाइल, landings search; Publication: search | FishSource | हमारे चारों ओर समुद्र
साधन
अधिक जानकारी
मानव संबंधीटिकट, सिक्के, विविध.
इंटरनेट स्रोत
मॉडल पर आधारित अनुमान
Rate of population increase
|
Prior r = 0.57, 95% CL = 0.37 - 0.85, Based on 3 data-limited stock assessments. |
मछली पकड़ने की भेद्यता
(संदर्भ 71543) |
Low to moderate vulnerability (31 of 100). |
जलवायु भेद्यता
(संदर्भ 125649) |
Moderate to high vulnerability (51 of 100) |
मूल्य श्रेणी
(संदर्भ 80766): |
Very high. |
Nutrients
|
Calcium = 109 [35, 184] mg/100g; Iron = 1.59 [1.21, 1.97] mg/100g; Protein = 20.2 [19.2, 21.3] %; Omega3 = 0.285 [0.185, 0.386] g/100g; Selenium = 48.3 [-31.7, 128.3] μg/100g; VitaminA = 0 μg/100g; Zinc = 1.79 [1.17, 2.40] mg/100g (wet weight); based on nutrient studies. |
