9: CARCHARHINIDAE (REQUIEM SHARKS)
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9.31 Paraga/eus pectoralis: 93 em mature male (Angola, after Poll, 1951).
Viviparous, with one foetus in each uterus. Attains at
least 96 cm. Dark grey above, white below; prominent
black blotch on apex of 2nd D, the other fins with conspicuous white tips and margins. Known only from a gravid
female caught off Kosi Bay.
9.31 Paragaleus pectoralis
(Garman, 1906)
Atlantic weasel shark
Atlantiese weselhaai
Hemigaleus pectoralis: Garman, 1906: 203 (?Massachusetts, Rhode
Island). Paragaleus pectoralis: Krefft, 1968: 42; Compagno, 1981: Hemig
Para 1*.
Spiracles small. Upper lip folds at least 1/2 as long as mouth length.
Lower C lobe acute, upper edge of C rippled. Teeth about ~ ; upper teeth
with smooth oblique cusps, the bases strongly denticulated laterally. Total
vertebrae 135-150.
Grey-brown above, white below, with horizontal yellow
stripes on flanks (fading after death); underside of snout tip
with a pair of short longitudinal black stripes. P. pectoralis is
a tropical eastern Atlantic species, possibly ranging south to
northern Namibia.
-- ,
N
9.32 Prionace g/auca: 279 em mature male (Natal). N & T as in 2.1.
84
Genus Prionace Cantor, 1849
One species.
Blue shark
9.32 Prionace glauca
(Linnaeus, 1758)
PLATE 1
Blouhaai
Squalus glaucus Linnaeus, 1758: 235 ("European Ocean"). Glyphis
glaucus: Smith, SFSA No. 10*. Prionace glauca: Bass et aI., 1975: 32*.
Elongate body and snout; 1st D just in front of V; P long, falcate. No
spiracles or interdorsal ridge. Minute lip folds. Teeth unicuspid, strongly
serrated, broadly triangular and curved in upper jaw, narrower in lower
jaw. Precaudal vertebrae 146-150.
Brilliant dark blue above, white below (fades to grey
after death). Viviparous; the most fecund of all sharks with
35-135 pups per litter; born at 50 cm; mature at 2.2 m;
attains 3.5 m. Scavenger/predator; can be dangerous to
man. Widespread throughout all major oceans, favours
waters with a temperature of 12-16 dc. In tropical areas
found offshore at some depth (80 - 220 m), but occurring
close to shore and near surface in warm-temperate areas
e.g. off southwestern Cape coast.
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\J
9.31 Paraga/eus pectoralis: 93 em mature male (Angola, after Poll, 1951).
Viviparous, with one foetus in each uterus. Attains at
least 96 cm. Dark grey above, white below; prominent
black blotch on apex of 2nd D, the other fins with conspicuous white tips and margins. Known only from a gravid
female caught off Kosi Bay.
9.31 Paragaleus pectoralis
(Garman, 1906)
Atlantic weasel shark
Atlantiese weselhaai
Hemigaleus pectoralis: Garman, 1906: 203 (?Massachusetts, Rhode
Island). Paragaleus pectoralis: Krefft, 1968: 42; Compagno, 1981: Hemig
Para 1*.
Spiracles small. Upper lip folds at least 1/2 as long as mouth length.
Lower C lobe acute, upper edge of C rippled. Teeth about ~ ; upper teeth
with smooth oblique cusps, the bases strongly denticulated laterally. Total
vertebrae 135-150.
Grey-brown above, white below, with horizontal yellow
stripes on flanks (fading after death); underside of snout tip
with a pair of short longitudinal black stripes. P. pectoralis is
a tropical eastern Atlantic species, possibly ranging south to
northern Namibia.
-- ,
N
9.32 Prionace g/auca: 279 em mature male (Natal). N & T as in 2.1.
84
Genus Prionace Cantor, 1849
One species.
Blue shark
9.32 Prionace glauca
(Linnaeus, 1758)
PLATE 1
Blouhaai
Squalus glaucus Linnaeus, 1758: 235 ("European Ocean"). Glyphis
glaucus: Smith, SFSA No. 10*. Prionace glauca: Bass et aI., 1975: 32*.
Elongate body and snout; 1st D just in front of V; P long, falcate. No
spiracles or interdorsal ridge. Minute lip folds. Teeth unicuspid, strongly
serrated, broadly triangular and curved in upper jaw, narrower in lower
jaw. Precaudal vertebrae 146-150.
Brilliant dark blue above, white below (fades to grey
after death). Viviparous; the most fecund of all sharks with
35-135 pups per litter; born at 50 cm; mature at 2.2 m;
attains 3.5 m. Scavenger/predator; can be dangerous to
man. Widespread throughout all major oceans, favours
waters with a temperature of 12-16 dc. In tropical areas
found offshore at some depth (80 - 220 m), but occurring
close to shore and near surface in warm-temperate areas
e.g. off southwestern Cape coast.