Environment: milieu / climate zone / depth range / distribution range
البيئة
بحري; مياه مخلوطة القاع; نطاق العمق 0 - 280 m (Ref. 34024). Subtropical; 47°N -
Eastern Pacific: Washington, USA to Baja California and Ecuador. Record from the Gulf of California is doubtful.
الحجم / وزن / العمر
Maturity: Lm ? range ? - ? cm
Max length : 40.4 cm TL ذكر/ مختلط الجنس; (Ref. 30541); common length : 30.0 cm TL ذكر/ مختلط الجنس; (Ref. 55763)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
الأشواك الظهرية (المجموع) : 0; الأشعة الظهرية الناعمة (المجموع) : 187 - 229; شوكة شرجية: 0; أشعه شرجية لينه: 150 - 181; فقرات: 86 - 91. Head naked; scales on body in basketweave pattern; precaudal vertebrae 18-19; swim bladder in males with posterior opening; body and head with numerous dark spots and blotches (Ref. 34024). Branchiostegal rays: 7 (Ref. 36413). Pelvic fin consists of one ray with two branches of unequal length (Ref. 36413).
Uncommon species found on sandy bottom from the shore to 280 m (Ref. 34024). Adults often burrow tail-first in sand, live in mucus-lined holes (Ref. 2850), mud, eelgrass and rock rubble (Ref. 36413). Mostly active at night and on overcast days (Ref. 2850). Important food for sea lions and cormorants (Ref. 2850). Oviparous, with planktonic larvae and extended pelagic juvenile (Ref. 36413). Oval, pelagic eggs float in a gelatinous mass (Ref. 205).
Life cycle and mating behavior
Maturities | التكاثر | Spawnings | Egg(s) | Fecundities | Larvae
Nielsen, J.G., D.M. Cohen, D.F. Markle and C.R. Robins, 1999. Ophidiiform fishes of the world (Order Ophidiiformes). An annotated and illustrated catalogue of pearlfishes, cusk-eels, brotulas and other ophidiiform fishes known to date. FAO Fish. Synop. 125(18):178p. Rome: FAO. (Ref. 34024)
IUCN Red List Status (Ref. 130435)
استخدامات بشرية
مصائد: غير ذات اهمية
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Preferred temperature (Ref.
123201): 9.3 - 15.1, mean 11.3 °C (based on 51 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00102 (0.00046 - 0.00225), b=3.06 (2.88 - 3.24), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 4.1 ±0.57 se; based on food items.
Generation time: 2.9 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
المرونه (Ref.
120179): وسيط, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 1.4-4.4 سنة (K=0.3).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (32 of 100).
