Classification / Names
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इलाज़मौबरांकी (शारक और रेज़) (sharks and rays) >
Squaliformes (Sleeper and dogfish sharks) >
Squalidae (Dogfish sharks)
Etymology: Squalus: Genus name from Latin 'squalus' meaning shark (Ref. 6885, 27436); bahiensis: Named for its type locality, state of Bahia, northeastern Brazil.
Environment: milieu / climate zone / गहराई सीमा / distribution range
पारिस्थितिकी
समुद्री pelagic-oceanic; गहराई सीमा ? - 599 m (Ref. 109601). Tropical
Southwest Atlantic: apparently endemic to the coast near Salvador, Bahia, Brazil.
आकार / वज़न / Age
परिपक्व अवधि: Lm ? range ? - ? cm
Max length : 69.0 cm TL पुल्लिंग / अलिंग; (Ref. 109601)
Short description
पहचान कुंजी | आकृति विज्ञान | मौरफोमैटरिक्स
जानवरों की रीड़ का जोड़: 115 - 117. This species is distinguished from all species of the S. megalops group by possessing pectoral fins with free rear tips rounded (vs. pointed); snout blunt and elongate (vs. rounded and short); dermal denticles tricuspid and rhomboid (vs. unicuspid and lanceolate); differs from S. mitsukurii by having narrower interorbital space, 8.2%, 7.9%-8.3% TL (vs. 9.3%, 9.1%-9.8% TL), shorter lower caudal fin lobe with preventral caudal margin 11.4%, 10.9%-11.3% TL (vs. 12.1%, 11.5%-12.4% TL); differs from S. blainvillei (from the Mediterranean Sea) by having lower dorsal fins with first dorsal-fin height 6.9%, 7.0%-7.1% TL (vs. 8.2%, 7.3%-8.7% TL), with second dorsal-fin height 5.3%, 4.2%-4.4% TL (vs. 7.2%, 6.6%-7.5% TL), a shorter upper labial furrow, its length 2.3%, 2.2% TL (vs. 2.5%, 2.4%-2.7% TL); differs from S. lobularis by having its caudal fin somewhat slender (vs. upper caudal lobe rectangular), second dorsal-fin spine not reaching dorsal-fin apex (vs. reaching dorsal-fin apex), shorter pectoral-fin inner margin with its length 8.1%, 8.4%-8.9% TL (vs. 10.5%, 9.2%-11.0% TL), greater clasper outer length of 5.0%, 4.6%-5.1% TL (vs. 4.3% TL) (Ref. 109601).
Body shape (shape guide): fusiform / normal; Cross section: angular.
Life cycle and mating behavior
परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | Fecundity | लार्वा
Viana, S.T.d.F., M.R. De Carvalho and U.L. Gomes, 2016. Taxonomy and morphology of species of the genus Squalus Linnaeus, 1758 from the Southwestern Atlantic Ocean (Chondrichthyes: Squaliformes: Squalidae). Zootaxa 4133(1):1-89. (Ref. 109601)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
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इंटरनेट स्रोत
Estimates based on models
Phylogenetic diversity index (संदर्भ
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00933 (0.00350 - 0.02485), b=3.03 (2.80 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (संदर्भ
69278): 4.3 ±0.3 se; based on size and trophs of closest relatives
लौटाव (संदर्भ
120179): निम्न, न्यूनतम जनसंख्या दुगनी होने का समय 4.5 - 14 वर्ष। (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (48 of 100).
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