Hydrozoa |
Leptothecata |
Sertulariidae
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
Sessile; 深度上下限 57 - 346 m (參考文獻 7414). Polar
Antarctic Atlantic: South Shetland and South Georgia.
初熟時的長度 / 大小 / 重量 / 年齡
成熟度: Lm ? range ? - ? cm Max length : 48.0 cm H 雄魚/尚未辨別雌雄; (參考文獻 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).
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
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.
主要參考資料
參考文獻 | 合作者 | 合作者
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. (參考文獻 7414)
IUCN 瀕危狀態
(參考文獻 130435: Version 2025-2 (Global))
CITES狀態 (參考文獻 108899)
Not Evaluated
Not Evaluated
對人類具威脅
Harmless
人類使用
FAO - Publication: search | FishSource |
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更多資訊
營養生態學食物項目（獵物）
食性組成
食物消耗量
捕食者
人口動態成長
最大年齡/尺寸
長度重量比
長度關係
長度-頻率
質量轉換
豐度
網路資源
基於模型的估計
釣魚的脆弱性
(參考文獻 71543) |
Moderate vulnerability (38 of 100). |
