Pristiophorus nancyae, African dwarf sawshark

Pristiophorus nancyae Ebert & Cailliet, 2011

African dwarf sawshark
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This map was computer-generated and has not yet been reviewed.
Pristiophorus nancyae   AquaMaps   Data sources: GBIF OBIS
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Elasmobranchii 板鰓亞綱 (鯊魚與魟魚) (sharks and rays) > Pristiophoriformes (Saw sharks) 鋸鯊目 (Saw sharks) > Pristiophoridae (Saw sharks) 鋸鯊科 (Saw sharks)
Etymology: Pristiophorus: pristio-, presumably derived from prio (Gr.), to saw, but treated here as a noun (a saw); phorus, from phoreus (Gr.), bearer or carrier, referring to saw-like snout (note also that pristis is Greek for sawfish) (See ETYFish)nancyae: In honor of philanthropist Nancy Packard Burnett (b. 1943), co-founder of the Monterey Bay Aquarium (Monterey, California, USA), for her “gracious support” of chondrichthyan research at the Pacific Shark Research Center at Moss Landing Marine Laboratories (also in California) (See ETYFish).
Eponymy: Mrs Nancy Ann Burnett née Packard (d: 1943) of the Packard family of Hewlett-Packard fame, is a marine biologist who has donated generously to organisations researching the oceans, including being one of the founders of the Monterey Bay Aquarium. [...] (Ref. 128868), visit book page.

環境: 環境 / 氣候帶 / 深度上下限 / 配送範圍 生態學

海洋 pelagic-oceanic; 深度上下限 286 - 570 m (Ref. 97326).

分布 領土 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri

Western Indian Ocean: central and southern Mozambique (Ref. 87357). Off Kenya and Yemen (Socotra Islands) (Ref. 97326). Records from off Somalia and the Arabian Sea off Pakistan appear to be a different, possibly undescribed, species (Ref. 87357).

初熟時的長度 / 大小 / 重量 / 年齡

成熟度: Lm ?  range ? - 57 cm
Max length : 61.6 cm TL 雄魚/尚未辨別雌雄; (Ref. 97326); 62.1 cm TL (female)

簡短描述 檢索表 | 型態特徵 | 形態測量圖

脊椎骨: 132 - 139. Diagnosis: A small five-gilled sawshark distinguished from its congeners by having the following characteristics: the presence of two rows of enlarged pre-barbel pits on the rostral ventral surface; rostral barbels closer to mouth than snout tip; base of large rostral teeth with ridges; eyes very large, oval-shaped, emerald green in life; first dorsal fin broadly triangular, with rear tip extending behind pelvic fin midbases; lateral trunk denticles imbricated; colouration in life brownish gray laterally, becoming lighter ventrally; fin margins lighter along posterior edges; dorsal rostrum surface with two distinct longitudinal dark stripes; lateral rostral teeth dark-edged (Ref. 87357).
Body shape (shape guide): elongated.

生物學特性     字彙 (例如 epibenthic)

This species is a poorly known inhabitant of the upper continental slope in tropical waters found at depths of 286-500 m (Ref. 87357). Stomach contents include an unidentified organic material, partially digested shrimplike crustaceans, and small decapod shrimps; no fish or cephalopod remains were found (Ref. 87357). Larger individuals had small puncture marks and elongated parallel cuts on their backs and tails suggestive of combat injuries from the rostra of other sawsharks (Ref. 87357). Unknown litter size; it may be caught and discarded as bycatch by offshore shrimp trawlers and other deepwater fisheries operations off Mozambique (Ref. 87357).

生命週期和交配行為 成熟度 | 繁殖 | 產卵場 | | 孕卵數 | 仔魚


主要參考資料 上傳您的推薦信 | 參考文獻 | 合作者 : Compagno, Leonard J.V. | 合作者

Ebert, D.A and G.M. Cailliet, 2011. Pristiophorus nancyae, a new species of sawshark (Chondrichthyes: Pristiophoridae) from Southern Africa. Bull. Mar. Sci. 87(3):501-512. (Ref. 87357)

IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))

  無危 (LC) ; Date assessed: 24 April 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

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營養生態學
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入添量
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基於模型的估計

系統發育多樣性指數
(參考文獻 82804)
PD50 = 0.5098 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
營養階層
(參考文獻 69278)
3.8   ±0.6 se; based on size and trophs of closest relatives
釣魚的脆弱性
(Ref. 59153)
Low to moderate vulnerability (29 of 100). 🛈