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Life Cycle

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Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref. 50449). 2-10 young born in the summer (Ref. 5578).
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Crispina B. Binohlan
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Biology

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Found from the surf line to about 70 m depth (Ref. 5578), also reported as common in shallow waters to at least 75 m depth (Ref. 114953); also enters estuaries (Ref. 27121). Feeds on crustaceans, bivalves, polychaete worms and small bony fishes (Ref. 5578). Ovoviviparous (Ref. 50449). Males mature at ca. 59 cm TL, females at 62-65 cm TL; born at ca. 23 cm TL. Produces litters of 2-10 pups (Ref. 114953). Taken by surf anglers (Ref. 3919). Flesh highly esteemed (Ref. 3919). It is parasitised by the monogeneans Pseudoleptobothrium christisoni on the dorsal skin surface (Ref. 124055) and Neoheterocotyle robii on the gill lamellae (Ref. 124054).
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Importance

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fisheries: commercial; gamefish: yes; aquarium: commercial
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Lesser guitarfish

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The lesser guitarfish or lesser sandshark (Acroteriobatus annulatus) is a species of fish in the Rhinobatidae family.

Description

This sand shark grows up to 140 cm long. It has a flat, triangular snout with nearly translucent areas on either side. The upper part of the body is pale cream with dark rings surrounding dark spots. The underside is white. The dorsal fins are set well back on the tail.[2]

Distribution and habitat

This shark lives on sandy plains.[2] It is found in Angola, Namibia, South Africa, and possibly Mozambique. Its natural habitats are shallow seas and estuarine waters.

Conservation

This species is classified as vulnerable by the IUCN. It is threatened by habitat loss.

References

  1. ^ Pollom, R.; Da Silva, C.; Gledhill, K.; Leslie, R.; McCord, M.E. & Winker, H. (2020). "Acroteriobatus annulatus". IUCN Red List of Threatened Species. 2020: e.T60163A124446397. doi:10.2305/IUCN.UK.2020-2.RLTS.T60163A124446397.en. Retrieved 17 November 2021.
  2. ^ a b Zsilavecz, Guido (2005). Coastal fishes of the Cape Peninsula and False Bay : a divers' identification guide. Cape Town: Southern Underwater Research Group. ISBN 0-620-34230-7. OCLC 70133147.
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Lesser guitarfish: Brief Summary

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The lesser guitarfish or lesser sandshark (Acroteriobatus annulatus) is a species of fish in the Rhinobatidae family.

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