Pristiophorus nancyae, African dwarf sawshark : fisheries

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Pristiophorus nancyae Ebert & Cailliet, 2011

African dwarf sawshark
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Native range | All suitable habitat | Point map | Year 2100
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Pristiophorus nancyae   AquaMaps   Data sources: GBIF OBIS
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Classificação / Names Nomes comuns | Sinónimos | Catalog of Fishes(Género, Espécies) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (tubarões e raias) (sharks and rays) > Pristiophoriformes (Saw sharks) > Pristiophoridae (Saw sharks)
Etymology: Pristiophorus: Greek, pristis = saw + Greek, pherein = to carry (Ref. 45335);  nancyae: The species name nancyae is in honor of Nancy Packard Burnett for her gracious support of chondrichthyan research at the Pacific Shark Research Center at Moss Landing Marine Laboratories (Ref. 87357)

Environment: milieu / climate zone / depth range / distribution range Ecologia

; marinhas; intervalo de profundidade 286 - 570 m (Ref. 97326), usually - m (Ref. ).   Tropical; 0°C -

Distribuição Países | Áreas FAO | Ecossistemas | Ocorrências | Point map | Introduções | 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).

Length at first maturity / Tamanho / Peso / Idade

Maturity: Lm ?  range ? - 57 cm
Max length : 61.6 cm TL macho/indeterminado; (Ref. 97326); 62.1 cm TL (female)

Descrição breve Morfologia | Morfometria

Vértebras: 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).

Biologia     Glossário (ex. 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).

Life cycle and mating behavior Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas

Referência principal Upload your references | Referências | Coordenador : Compagno, Leonard J.V. | Colaboradores

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)

Categoria na Lista Vermelha da IUCN (Ref. 124695)

  Preocupação menor (LC) ; Date assessed: 24 April 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Ameaça para o homem

  Harmless





Utilização humana

Pescarias:
FAO - Publication: search | FishSource |

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Fontes da internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Consultar FishWatcher | CISTI | Catalog of Fishes: Género, Espécies | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genoma, nucleotídeo | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Árvore da vida | Wikipedia: ir para, procurar | World Records Freshwater Fishing | Zoobank | Registo zoológico

Estimates based on models

Preferred temperature (Ref. 115969): 9.8 - 12.4, mean 11.4 °C (based on 18 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5156   [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).
Nível Trófico (Ref. 69278):  3.8   ±0.6 se; based on size and trophs of closest relatives
Resiliência
Vulnerabilidade (Ref. 59153):  Low to moderate vulnerability (29 of 100) .