Pristiophorus nancyae, African dwarf sawshark

Pristiophorus nancyae Ebert & Cailliet, 2011

African dwarf sawshark
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Pristiophorus nancyae   AquaMaps   Data sources: GBIF OBIS
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Elasmobranchii 板鳃亚纲 (鲨鱼与 鱼) (sharks and rays) > Pristiophoriformes (Saw sharks) > Pristiophoridae (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.

环境:氛围 / 气候带 / 深度上下限 / 分布范围 生态学

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

分布 领土 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | 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).

首次成熟时的长度 / 大小 / 重量 / 年龄

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

简单描述 检索表 | 型态特徵 | 形态测量图

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.

生物学特性     字汇 (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).

生命周期和交配行为 成熟度 | 繁殖 | 产卵场 | | 孕卵数 | 仔鱼


主要参考文献 上传您的参考资料 | 参考文献 | 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)

世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))

  最不相关 (LC) ; Date assessed: 24 April 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

 





人类利用

FAO - Publication: search | FishSource |

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成熟度
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特别资料

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网络资源

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基于模型的估算

系统发育多样性指数
(参考文献 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).
营养阶层
(参考文献 69278)
3.8   ±0.6 se; based on size and trophs of closest relatives
渔业脆弱性
(Ref. 59153)
Low to moderate vulnerability (29 of 100). 🛈