Bythaelurus bachi Weigmann, Ebert, Clerkin, Stehmann & Naylor, 2016
Bach's catshark
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Bythaelurus bachi
Female Bild av Weigmann, S.
Bilder | Google image
Female Bild av Weigmann, S.
Klassificering / Namn Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii (hajar och rockor) (sharks and rays) > Carcharhiniformes (Ground sharks) > Pentanchidae (Deepwater catsharks)
Etymology: Bythaelurus: bythos (Gr.), depths of the sea, referring to its deepwater habitat; ailouros (Gr.), cat, probably an allusion to the vernacular “catshark,” so named for its cat-like eyes (See ETYFish); bachi: In honor of Johann Sebastian Bach (1685-1750), a “musical genius and one of the greatest composers of all time” (so named because the senior author admires Bach and not for any Bach-like feature the shark might possess, Simon Weigmann, pers. comm.) [see also B. vivaldii] (See ETYFish).
Eponymy: Johann Sebastian Bach (1685–1750) was described in the etymology as: “…a musical genius and one of the greatest composers of all time.” There is no further need here for a lengthy biography. (Ref. 128868), visit book page.
Etymology: Bythaelurus: bythos (Gr.), depths of the sea, referring to its deepwater habitat; ailouros (Gr.), cat, probably an allusion to the vernacular “catshark,” so named for its cat-like eyes (See ETYFish); bachi: In honor of Johann Sebastian Bach (1685-1750), a “musical genius and one of the greatest composers of all time” (so named because the senior author admires Bach and not for any Bach-like feature the shark might possess, Simon Weigmann, pers. comm.) [see also B. vivaldii] (See ETYFish).
Eponymy: Johann Sebastian Bach (1685–1750) was described in the etymology as: “…a musical genius and one of the greatest composers of all time.” There is no further need here for a lengthy biography. (Ref. 128868), visit book page.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde Ekologi
marina pelagic-oceanic; djupintervall 910 - 1365 m (Ref. 113731). Tropical; 32°S - 34°S, 43°E - 46°E (Ref. 138856)
Utbredning Territorier | FAO områden | Ekosystem | Förekomster | Prickkarta | Utplanteringar | Faunafri
Western Indian Ocean: Madagascar Ridge at Walters Shoals.
Storlek / Vikt / Ålder
Könsmognad: Lm ? range ? - ? cm
Max length : 42.2 cm TL hane/ej könsbestämd; (Ref. 113731); 44.5 cm TL (female)
Max length : 42.2 cm TL hane/ej könsbestämd; (Ref. 113731); 44.5 cm TL (female)
Kort beskrivning Bestämningsnycklar | Morfologi | Morfometri
This species is distinguished by the following characters: body firm and stout (slender in juveniles); snout long, preorbital length 4.7-7.6% TL and has a broad, bell-shaped in dorsoventral view with distinct lateral indention; pre-outer nostril length 1.1-1.9 times internarial space; preorbital snout length 0.7-1.0 times interorbital space; preoral snout length 1.0-1.9 times in mouth width; eye length 9.0-13.0 times in predorsal distance, 3.6-5.4 times in head length and 1.4-4.1 times eye height; head length 1.8-2.7 times width at level of maximum outer extent of anterior nostrils; head width at level of maximum outer extent of anterior nostrils 1.1-1.5 times width at level of lateral indention of head, 1.1-1.8 times preorbital length, and 7.2-10.0% TL; its tongue and roof of mouth densely set with oral papillae of distinct size, which are partially very large and conglomerated from several single papillae; pelvic anterior margin 1.1-2.1 times in pectoral-fin anterior margin; first dorsal-fin base 1.0-1.8 times in interdorsal space; length of second dorsal-fin inner margin 0.5-1.9 times in second dorsal-fin height; length of second dorsal-fin base 6.7-9.7% TL; anal-fin base 0.7-1.3 times interdorsal space; upper jaw with 70-84 and lower jaw with 60-76 rows of small tri- to pentacuspidate teeth with outer surface of crown furrowed by strong longitudinal ridges and structured by reticulations in basal areas; monospondylous trunk vertebrae centra 38-43, diplospondylous precaudal centra 33-43, total centra 124-132; dermal denticle morphology highly diverse in different body areas and post-embryonic specimens with very characteristic double row each of about 20 distinctly enlarged, blunt, spatulate, cross-based dermal denticles along dorsal trunk; claspers rather long and very thick, inner margin length 10.6-11.3% TL, base width 2.3-3.1% TL; no clasper hooks, cover rhipidion and pseudosiphon very large, envelope elongated. Colouration: body and fins plain beige to light grayish-brown, slightly brighter on ventral side (Ref. 113731)
Cross section: flattened.
Cross section: flattened.
The females of this species based on total length are mature at 39.2 cm and immature at 36.1 cm, while males are mature at 40.0 cm and immature at 37.6 cm . The size at hatching based on the three post-embryonic specimens is estimated at around 12.0 cm TL (Ref. 113731).
Livscykel och parningsbeteende Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Huvudreferens
Ladda upp dina referenser | referenser | Koordinator | Medarbetare
Weigmann, S., D.A. Ebert, P.J. Clerkin, M.F.W. Stehmann and G.J.P. Naylor, 2016. Bythaelurus bachi n. sp., a new deep-water catshark (Carcharhiniformes, Scyliorhinidae) from the southwestern Indian Ocean, with a review of Bythaelurus species and a key to their identification. Zootaxa 4208(5):401-432. (Ref. 113731)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Data deficient (DD) ; Date assessed: 24 April 2018
CITES
Not Evaluated
Hot mot människor
Harmless
Mänskliga användningsområden
FAO - Publication: search | FishSource |
Ytterligare information
Trofisk ekologi
Livsmedelsartiklar (preys)
Födosammansättning
Födointag
Matransoner
Predatorer
Livsmedelsartiklar (preys)
Födosammansättning
Födointag
Matransoner
Predatorer
Ekologi
Ekologi
Ekologi
Populationsdynamik
Tillväxtparametrar
Max. åldrar / storlekar
Längd-vikt rel.
Längd-längd rel.
Längd-frekvenser
Massakonvertering
Rekrytering
Abundans
Tillväxtparametrar
Max. åldrar / storlekar
Längd-vikt rel.
Längd-längd rel.
Längd-frekvenser
Massakonvertering
Rekrytering
Abundans
Livscykel
Reproduktion
Könsmognad
Mognad/Gills rel.
Fekunditet
Lek
Lekande aggregat
Ägg
Utveckling av ägg
Larver
Larvdynamik
Reproduktion
Könsmognad
Mognad/Gills rel.
Fekunditet
Lek
Lekande aggregat
Ägg
Utveckling av ägg
Larver
Larvdynamik
Anatomi
Gälyta
Hjärna
Otolit
Gälyta
Hjärna
Otolit
Fysiologi
Kroppssammansättning
Näringsämnen
Syreförbrukning
Typ av simning
Simhastighet
Visuella pigment
Ljud från fisk
Sjukdomar & Parasiter
Toxicitet (LC50)
Kroppssammansättning
Näringsämnen
Syreförbrukning
Typ av simning
Simhastighet
Visuella pigment
Ljud från fisk
Sjukdomar & Parasiter
Toxicitet (LC50)
Genetik
Genom
Genetik
Heterozygositet
Ärftlighet
Genetisk mångfald
Genom
Genetik
Heterozygositet
Ärftlighet
Genetisk mångfald
Människorelaterad
Vattenbrukssystem
Vattenbruksprofiler
Avelslinjer
Ciguatera-fall
Frimärken, mynt, diverse.
Vattenbrukssystem
Vattenbruksprofiler
Avelslinjer
Ciguatera-fall
Frimärken, mynt, diverse.
Verktyg
Särskilda rapporter
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Internet-källor
AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Släkte, Arter | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, sök | World Records Freshwater Fishing | Zoobank | Zoologiskt register
Uppskattningar baserade på modeller
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Index för fylogenetisk mångfald (Ref. 82804) |
PD50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.00347 (0.00171 - 0.00701), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
|
Trofisk nivå (Ref. 69278) |
4.3 ±0.5 se; based on size and trophs of closest relatives |
|
Resiliens (Ref. 120179) |
Låg, lägsta populationsfördubblingstid 4,5-14 år (Preliminary low fecundity). |
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Sårbarhet i fisket (Ref. 59153) |
Low to moderate vulnerability (25 of 100). 🛈 |