Holohalaelurus punctatus, African spotted catshark

Holohalaelurus punctatus (Gilchrist, 1914)

African spotted catshark
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Holohalaelurus punctatus   AquaMaps   Data sources: GBIF OBIS
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Holohalaelurus punctatus
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分類 / Names 俗名 | 同種異名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii 板鰓亞綱 (鯊魚與魟魚) (sharks and rays) > Carcharhiniformes (Ground sharks) 真鯊目 (Ground sharks) > Scyliorhinidae (Cat sharks) 貓鮫科 (Cat sharks)
Etymology: Holohalaelurus: Greek 'Holos' meaning entire, referring to the lack of labial folds, and the genus Halaelurus, for which Holohalaelurus was proposed as a subgenus of by Fowler (1934).;  punctatus: Name most likely derived from Latin 'punctum' meaning small hole, dot or spot, referring to the many small spots covering the dorsal surface of this species (Ref. 75585).

Environment: milieu / climate zone / depth range / distribution range 生態學

; 海洋 深海底的; 深度上下限 220 - 440 m (Ref. 5510).   深水域; 4°S - 37°S

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Western Indian Ocean: endemic to the subtropical and tropical waters of southwestern Indian Ocean, southern Mozambique, off Natal, South Africa and off Madagascar (Ref. 75585). Status of threat: a common catch in bottom trawls in Natal and southern Mozambique, yet, despite recent biodiversity trawl surveys in that region, not a single specimen has been collected from this area since 1972. ORI data sheets confirm that specimens collected between 1964 and 1972 were apparently abundant, particularly off Mozambique in May 1969, and off Durban in June 1971. The only specimens of this species that have been collected since this date have been those from Madagascar in the late 1980’s and early 1990’s (Ref. 75585).
西印度洋: 莫三比克南部與納塔爾外海,南非。 此魚種或相關魚種發現外海的馬達加斯加,肯亞與坦尚尼亞。 (參考文獻 5578)

Length at first maturity / 大小 / 重量 / 年齡

Maturity: Lm ?, range 30 - 32.6 cm
Max length : 35.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 5510); 26.0 cm TL (female)

簡短描述 型態特徵 | 形態測量圖

背棘 (總數): 0; 背的軟條 (總數): 0; 臀棘 0; 臀鰭軟條: 0. A broad-headed, dwarf catshark with small dark brown spots closely set on a yellow-brown or orange-brown background; small black pores on underside of head and body; no labial furrows (Ref. 5578).
一個寬頭又矮小的貓鯊有小的深褐色的斑點在黃褐色或橘褐色背景上緊密地在一起; 在頭部與身體的下面上的小的黑色孔; 沒有唇溝.(參考文獻 5578)

生物學特性     字彙 (例如 epibenthic)

Found on the uppermost continental slopes (Ref. 244). Feeds on small fishes, crustaceans, and cephalopods (Ref. 5213). The adult males are larger than females, a characteristic unusual among sharks (Ref. 244). Manifests partial sexual segregation. Oviparous (Ref. 50449).

棲息於最上面的大陸斜坡了。 (參考文獻 244) 吃小魚,甲殼動物與頭足類動物。 (參考文獻 5213) 成魚雄性是大於雌性, 一個特殊的罕見在鯊魚之中.(參考文獻 244) 顯示部分的性別異形性。 卵生的.(參考文獻 50449)

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | | 孕卵數 | 仔魚

Oviparous, with one egg-case laid per oviduct at a time. Embryos feed solely on yolk (Ref. 50449). Partial sexual segregation is manifested by greater number of males than females off Natal but not off southern Mozambique.西印度洋: 莫三比克南部與納塔爾外海,南非。 此魚種或相關魚種發現外海的馬達加斯加,肯亞與坦尚尼亞。 (參考文獻 5578)

主要參考資料 Upload your references | 參考文獻 | 合作者 : Compagno, Leonard J.V. | 合作者

Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)

IUCN 瀕危狀態 (Ref. 123251)

  瀕危 (EN) (A2d); Date assessed: 01 August 2019

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

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Estimates based on models

Preferred temperature (Ref. 115969): 13.1 - 15.8, mean 15.3 °C (based on 13 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5312   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00331 (0.00171 - 0.00643), b=3.14 (2.96 - 3.32), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
營養階層 (Ref. 69278):  4.2   ±0.61 se; based on food items.
回復力 (Ref. 120179):  低的, 最小族群倍增時間4.5 - 14 年 (Fec assumed to be <100).
瀕危性 (Ref. 59153):  Low to moderate vulnerability (34 of 100) .