Hydrozoa |
Leptothecata |
Sertulariidae
محیط زیست: محیط زیست / منطقه آب و هوایی / تغييرات عمق / محدوده توزیع
بوم شناسي
Sessile; تغييرات عمق 57 - 346 m (مرجع 7414). Polar
Antarctic Atlantic: South Shetland and South Georgia.
طول در اولین بلوغ / اندازه / وزن / سن
بلوغ: Lm ? range ? - ? cm Max length : 48.0 cm H جنس نر / بدون خواص جنسي; (مرجع 7414)
Stems up to 48 cm high, of dark brown color and polysiphonic over a great part of their length. Main stem slightly geniculate. Branching starting at basal part of colony, frequent, in one plane, and approximately alternate. Branches distinctly constricted at their origin, originating at an angle of ca 45°, curving and running more or less parallel to the original branch. Branches with irregularly arranged perisarc constrictions. Hydrothecae present all over the colony, although invisible in polysiphonic parts. Hydrothecae usually arranged in decussate verticils of three to six hydrothecae, forming 6 to12 longitudinal rows; however, decussate pairs of hydrothecae
may be present in youngest, distal branches. Hydrothecae sunken into the branches and stems for approximately half of their volume, adcauline wall adnate for almost full length. In lateral view hydrotheca cylindrical, slightly curved abcaudally. In frontal view maximum diameter at hydrothecal base and then slowly decreasing in diameter towards the aperture. Hydrothecal aperture either even and approximately circular, or uneven with a more or less distinct prolongation of the abcauline hydrothecal wall, making the aperture laterally depressed. Hydrothecal aperture either tilted downwards, forming an acute angle with the
longitudinal axis of stem, or tilted upwards, being more or less perpendicular to long axis of branches. Rim of hydrothecal aperture sometimes with a few shallow renovations. Diaphragm mushroom-shaped.
Length based on stem height. Shelf species. Found at depths 57 to 346 m on rocky and stony bottoms (Ref. 7414).
چرخه زندگی و رفتار جفت‌گیری
بلوغ | تولید مثل | تخم ریزی | تخم ها | باروری | توزاد ( لارو)
Members of the order Leptothecata include L-form hydroids. Life cycle: The zygote develops into planula and later into polyp then into free-swimming medusa.
مآخذ اصلی
مراجع | هماهنگ كننده | همكاران
Peña Cantero, A.L. and W. Vervoort 2003 Species of Staurotheca Allman, 1888 (Cnidaria; Hydrozoa: Sertulariidae) from US Antarctic expeditions, with the description of three new species. Journal of Natural History 37:2653-2722. (مرجع 7414)
وضعيت در فهرست قرمز IUCN
(مرجع 130435: Version 2025-2 (Global))
وضعيت از نظر سايتس (مرجع 108899)
Not Evaluated
Not Evaluated
خطر برای انسان ها
Harmless
استفاده انسانی
FAO - Publication: search | FishSource |
ابزارها
اطلاعات بيشتر
بوم‌شناسی گرمسیریاقلام غذایی (طعمه‌ها)
تركيب غذايي
مصرف غذايي
شکارچیان
پویایی جمعیترشد
حداکثر سن/اندازه
نسبت طول-وزن.
طول-طول نسبی.
نوسانات طولی
تبدیل انبوه
فراواني
چرخه زندگیتولید مثلبلوغباروریتخم ریزیتخم هانمو تخمتوزاد ( لارو) مرتبط با انسانتمبر، سکه، متفرقه.
منابع اينترنتي
تخمین‌ها بر اساس مدل‌ها
آسیب‌پذیری ماهیگیری
(مرجع 71543) |
Moderate vulnerability (38 of 100). |
