Elasmobranchii (sharks and rays) > Carcharhiniformes
(Ground sharks) > Scyliorhinidae
(Cat sharks) > Schroederichthyinae
Etymology: Schroederichthys: In honor of American ichthyologist William C. Schroeder (1895-1977), Woods Hole Oceanographic Institution, for his pioneering work (with Henry B. Bigelow) on cartilaginous fishes; ichthyos (Gr.), fish. (See ETYFish); bivius: bi-, from bis (L.), two; via (L.), way or passage, etymology not explained, perhaps referring to double-valved nostrils, with incurrent and excurrent apertures. (See ETYFish).
More on authors: Müller & Henle.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 14 - 78 m (Ref. 244). Subtropical; 23°S - 56°S
Southeast Pacific and Southwest Atlantic: central Chile to the Straits of Magellan and Argentina.
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 40 - ? cm
Max length : 70.0 cm TL male/unsexed; (Ref. 244)
A common inshore to offshore shark found on the continental shelf. Oviparous (Ref. 50449). Dental sexual dimorphism exists, with adult males having teeth at least twice as high as adult females as well as much longer and narrower mouths.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Sexual dimorphism is evident in dentition of male species (Ref. 49562). Males have longer teeth with fewer cusps than females (Ref. 51093) to make 'courtship biting' more effective (Ref. 49562).
Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)
IUCN Red List Status (Ref. 125652)
Threat to humans
Fisheries: of no interest
Estimates based on models
Preferred temperature (Ref. 115969
): 6.4 - 15.6, mean 10.6 °C (based on 202 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5312 [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 BS (Ref. 93245
Trophic level (Ref. 69278
): 3.8 ±0.3 se; based on diet studies.
Resilience (Ref. 120179
): Very Low, minimum population doubling time more than 14 years (Fec=2).
Fishing Vulnerability (Ref. 59153
): Moderate to high vulnerability (48 of 100) .
Climate Vulnerability (Ref. 125649
): (0 of 100) .
Nutrients (Ref. 124155
): Calcium = 46.4 [6.9, 193.3] mg/100g ; Iron = 0.886 [0.236, 2.484] mg/100g ; Protein = 15.8 [13.5, 19.9] % ; Omega3 = 0.215 [0.094, 0.476] g/100g ; Selenium = 24.4 [6.9, 74.1] μg/100g ; VitaminA = 10.8 [4.1, 27.4] μg/100g ; Zinc = 0.662 [0.314, 1.552] mg/100g (wet weight); based on nutrient studies.