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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.
Περιβάλλον: περιβάλλον / κλιματική ζώνη / εύρος βάθους / εύρος διανομής
Οικολογία
Θαλασσινό(ά) pelagic-oceanic; εύρος βάθους 286 - 570 m (Ref. 97326). Tropical
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).
Μήκος κατά την πρώτη ωρίμανση / Μέγεθος / Βάρος / Ηλικία
Γεννητική Ωρίμανση: Lm ? range ? - 57 cm
Max length : 61.6 cm TL αρσενικό/απροσδιόριστο; (Ref. 97326); 62.1 cm TL (female)
Σύντομη περιγραφή
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
Σπόνδυλοι: 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.
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).
Κύκλος ζωής και συμπεριφορά ζευγαρώματος
Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες
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)
Κατάσταση Κόκκινου Καταλόγου IUCN (Ref. 130435: Version 2025-2 (Global))
Απειλή για τον άνθρωπο
Harmless
Ανθρώπινες χρήσεις
Εργαλεία
Ειδικές εκθέσεις
Λήψη XML
Διαδικτυακές πηγές
Εκτιμήσεις βάσει μοντέλων
Προτιμώμενη θερμοκρασία (Αναφ.
123201): 9.8 - 12.4, mean 11.4 °C (based on 18 cells).
Δείκτης φυλογενετικής ποικιλότητας (Αναφ.
82804): PD
50 = 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).
Τροφικό Επίπεδο (Αναφ.
69278): 3.8 ±0.6 se; based on size and trophs of closest relatives
Ευπάθεια στην αλιεία (Ref.
59153): Moderate vulnerability (45 of 100).
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