Carcharhinus cerdale, Pacific smalltail shark

Carcharhinus cerdale Gilbert, 1898

Pacific smalltail shark
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分類 / Names 俗名 | 同種異名 | Catalog of Fishes(, ) | 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) > Carcharhinidae (Requiem sharks) 白眼鮫科 (Requiem sharks)
Etymology: Carcharhinus: Greek, karcharos = sharpen + Greek, rhinos = nose (Ref. 45335).

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

; 海洋 居於水底的.   

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

Eastern Pacific Ocean: from the Gulf of California to Peru.

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 140 cm TL 雄魚/尚未辨別雌雄; (Ref. 86285)

簡短描述 型態特徵 | 形態測量圖

This smooth-backed species is distinguished by the following: some specimens have a very weak interdorsal ridge (evident in embryos and neonates; not noticeable in the holotype or on a 103.4-cm male individual); first dorsal fin originates about the middle of the pectoral fin inner margin; its anterior margin is much longer than the distance from the apex to the free rear tip; height of first dorsal fin is about 9-10.5% of TL; second dorsal fin originates over or behind middle of anal base; caudal fin measures about one-fourth of the total length; has minute, inconspicuous hyomandibular pores behind the eye; upper teeth, from the first to the fifth tooth have broadly triangular, increasingly oblique cusps with serrated edges, with a notch on both edges at about a third of length from the base to the cusp (serrations from the notch to the base are much larger than those on the rest of the cusp); lower teeth have narrow, erect to slightly oblique, triangular cusps with more finely serrated edges; teeth number U:13 to 15-1 or 2-13 to 15, L:12 to 15-0 to 2-12 to 15; denticles roughly oblong and have minimal overlapping, with three central ridges, the central ridge being only slightly longer than the side ridges and terminating in a slightly longer point. Colour in preserved specimens: the first and second dorsal fins, the pelvic fins and the anal fin had dark or dusky edges, and the pectoral fins usually had dusky or black tips on their dorsal sides, and the lower caudal lobe was dusky or blacktipped; neonates have caudal fins with a black border, and their pectoral fins have a wide, white rear margin (Ref. 86285).

生物學特性     字彙 (例如 epibenthic)


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


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

Castro, J.I., 2011. Resurrection of the name Carcharhinus cerdale, a species different from Carcharhinus porosus. aqua, International Journal 17(1):1-10. (Ref. 86285)

IUCN 瀕危狀態 (Ref. 123251)

  未評估 

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

 





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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00479 (0.00219 - 0.01045), b=3.09 (2.92 - 3.26), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).
營養階層 (Ref. 69278):  4.1   ±0.6 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
瀕危性 (Ref. 59153):  High vulnerability (57 of 100) .