Squalus hemipinnis, Indonesian shortsnout spurdog

Squalus hemipinnis White, Last & Yearsley, 2007

Indonesian shortsnout spurdog
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Squalus hemipinnis   AquaMaps   Data sources: GBIF OBIS
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Image of Squalus hemipinnis (Indonesian shortsnout spurdog)
Squalus hemipinnis
Female picture by Krajangdara, T. & S. Rodpradit

分类 / Names 俗名 | 同种异名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii 板鳃亚纲 (鲨鱼与 鱼) (sharks and rays) > Squaliformes (Bramble, sleeper and dogfish sharks) > Squalidae (Dogfish sharks)
Etymology: Squalus: Genus name from Latin 'squalus' meaning shark (Ref. 6885, 27436).  More on authors: White, Last & Yearsley.

Environment: milieu / climate zone / depth range / distribution range 生态学

; 海洋 底中水层性; 深度上下限 1 - 100 m (Ref. 58445).   

分布 国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri

Eastern Indian Ocean: Indonesia.

Length at first maturity / 大小 / 重量 / 年龄

Maturity: Lm ?, range 43 - ? cm
Max length : 52.2 cm TL 雄鱼/尚未辨别雌雄; (Ref. 58445); 78.0 cm TL (female)

简单描述 型态特徵 | 形态测量图

This species is distinguished by the following set of characters: slender body of moderate size, depth 9-10.6% TL; relatively narrow and very short snout, horizontal prenarial length is 8.4-9.1% TL; large eyes, length 5.1-5.6% TL; secondary lobe of anterior nasal flap is well developed; small dorsal fins that are strongly raked; first dorsal-fin spine is moderate, broad-based while the second dorsal-fin spine is moderate, robust and broad-based; weakly falcate pectoral fin in adults its inner margin relatively short, 6.9-7.8% TL; caudal fin with a short, broad caudal bar, enlarged upper caudal blotch and the fringe is located distally on lobe in juveniles; flank denticles are broadly unicuspidate to weakly tricuspidate; monospondylous centra 35-38, precaudal centra 72-76, total centra 96-100 (Ref. 58445).

生物学特性     字汇 (例如 epibenthic)

Apparently occurs on or near the bottom of upper continental and insular slopes, but depth distribution is undetermined; probably on shallower water than its congeners. Presumably feeds on small fishes, cephalopods and crustaceans. Viviparous, with yolk-sac dependency. Gives birth to 3 -10 pups, but gestation period is unknown. Males mature at about 43 cm TL and females by 61 cm TL; with largest embryo measured at 18 cm. The species is a very common catch component fo the demersal longline fishery in deepwater areas in eastern Indonesia. It is caught for its meat, fins and liver oil (Ref. 58042).

Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | | 孕卵数 | 仔鱼

Distinct pairing with embrace (Ref. 205).

主要参考文献 Upload your references | 参考文献 | 合作者 : Compagno, Leonard J.V. | 合作者

White, W.T., P.R. Last and G.K. Yearsley, 2007. Squalus hemipinnis sp. Nov., a new short-snout spurdog from eastern Indonesia. pp. 101-108. In P.R. Last, W.T. White and J.J. Pogonoski Descriptions of new dogfishes of the genus Squalus (Squaloidea: Squalidae). CSIRO Marine and Atmospheric Research Paper No. 014. 130 pp. (Ref. 58445)

世界自然保护联盟红皮书 (Ref. 120744)

  临近濒危 (NT) ; Date assessed: 01 December 2008

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

 





人类利用

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网络资源

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Estimates based on models

Preferred temperature (Ref. 115969): 25.6 - 28.7, mean 28.3 (based on 20 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00331 (0.00153 - 0.00716), b=3.09 (2.91 - 3.27), in cm Total Length, based on LWR estimates for this Genus-body shape (Ref. 93245).
营养阶层 (Ref. 69278):  4.3   ±0.3 se; Based on size and trophs of closest relatives
回复力 (Ref. 120179):  非常低的, 最小族群倍增时间超过14 年 (Preliminary K or Fecundity.).
脆弱性 (Ref. 59153):  High to very high vulnerability (69 of 100) .