Hydrozoa |
Leptothecata |
Sertulariidae
محیط زیست: محیط زیست / منطقه آب و هوایی / تغييرات عمق / محدوده توزیع
بوم شناسي
نزديك كف زي; تغييرات عمق 18 - 4804 m (مرجع 7414). Temperate
Southwest Atlantic, Southeast Pacific and Antarctic Pacific. Temperate to polar.
طول در اولین بلوغ / اندازه / وزن / سن
بلوغ: Lm ? range ? - ? cm Max length : 12.0 cm H جنس نر / بدون خواص جنسي; (مرجع 7414)
Stems up to 12 cm high, polysiphonic over part of their length. Branching alternate and in one plane; sometimes anastomoses amongst the branches. Hydrothecae arranged in decussate verticils of two to four hydrothecae, forming four to eight longitudinal rows. Frequently, however, hydrothecal verticils with irregularities, and indistinct. Hydrothecae low, sunken into branches for approximately one-third of their volume. Adcauline hydrothecal wall adnate to internode for almost its entire length. Hydrothecal abcauline wall straight or slightly concave; hydrothecal aperture slightly laterally depressed; rim uneven due to the presence of an elevation of the abcauline hydrothecal wall, aperture only slightly tilted downward. Hydrotheca without mushroom-shaped diaphragm. Male and female gonothecae present. Female gonotheca arising from a stolonal process (modified branch) originating at the hydrothecal base. This
process provided with alternately arranged, isolated hydrothecae with one gonotheca at the base of each hydrotheca. Female gonotheca pear-shaped, sometimes provided with a few spine-shaped projections. Gonothecal aperture not observed. Male gonothecae inserted directly at the hydrothecal base and arranged in close proximity on the branches; gonotheca fusiform with a small circular aperture at the distal end.
Eurybathic species. Found from depths between 18 and 500m ; collected from 76 to 4804 m. On stony bottoms, pebbles, epilithic on gravel and epibiotic on bryozoans (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) |
Low vulnerability (10 of 100). |
