Chrysoblephus laticeps
| Red Roman | |
|---|---|
 | |
| in False Bay, South Africa | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Perciformes |
| Family: | Sparidae |
| Genus: | Chrysoblephus |
| Species: | C. laticeps |
| Binomial name | |
| Chrysoblephus laticeps (Valenciennes, 1830) | |
| Synonyms [2] | |
| |
Chrysoblephus laticeps ('golden-eyed broad head'), also known as the Red Roman or Roman seabream, is a species of sea bream from southern African, ranging from Namibia to the Eastern Cape. There are also old records from Madagascar and Mauritius, but the validity of these is doubtful.[1] This demersal fish grows to a maximum length of 50 centimetres (20 in) and a recorded mass of 4.2 kilograms (9.3 lb).[3] It is a slow-growing species showing late sexual maturity, and is closely related to the Red Stumpnose. It is found above rocky bottoms and reefs, in water up to 100 metres (330 ft) in depth and is often caught from the beach by anglers. Juveniles mature in seaweed beds and feed on mollusks, crustaceans, worms and fish. Adults are benthic feeders, living on crustaceans, sea urchins and polychaete worms.[3]
Mature females transform into territorial males upon further growth (see Protogyny).[4] The species forms pairs before an elaborate courtship ritual and spawning, the eggs being released well above the seafloor.[5]
The Red Roman is of robust build, orange to red in colour, showing a striking white saddle and white bar over the gill cover, with a horizontal blue line linking the eyes. Its canines are prominent and it has several rows of molars in both upper and lower jaws.
South African research shows that individuals occupy a territory ranging of 1,000–3,000 square metres (11,000–32,000 sq ft), and that the extent is independent of fish size or habitat quality. These small home ranges suggest that dispersal of the species is mainly by planktonic larvae. Activity is markedly reduced during the night, and when cold-water upwelling occur, fish seek the shelter of caves. Over the spawning period, females wander beyond their normal home boundaries.[6]
This species is sought after by line fishers, operating from the shore or from boats within the inshore zone. Linefishing is the least destructive fishing method, having little impact when carried out with rod and reel or a handline. Other methods, such as spearfishing, lead to overfishing and a population decline in areas such as Port Elizabeth and False Bay. Its slow growth renders the species particularly vulnerable. There is evidence of some recovery of numbers within Marine Protected Areas.[7]
References
- 1 2 Mann, B.Q.; Buxton, C.D. & Carpenter, K.E. (2014). "Chrysoblephus laticeps". IUCN Red List of Threatened Species. Version 2015.2. International Union for Conservation of Nature.
- ↑ Nicolas Bailly (2012). Nicolas Bailly, eds. "Chrysoblephus laticeps (Valenciennes, 1830)". FishBase. World Register of Marine Species. Retrieved April 16, 2012.
- 1 2 Froese, Rainer and Pauly, Daniel, eds. (2015). "Chrysoblephus laticeps" in FishBase. September 2015 version.
- ↑ Universal Fish Catalogue
- ↑ C. D. Buxton (1990). "The reproductive biology of Chrysoblephus laticeps and C. cristiceps (Teleostei: Sparidae)". Journal of Zoology. 220 (3): 497–511. doi:10.1111/j.1469-7998.1990.tb04321.x.
- ↑ S. E. Kerwath; A. Götz; C. G. Attwood; W. H. H. Sauer; C. G. Wilke (2007). "Area utilisation and activity patterns of roman Chrysoblephus laticeps (Sparidae) in a small marine protected area". African Journal of Marine Science. 29 (2): 259–270. doi:10.2989/AJMS.2007.29.2.10.193.
- ↑ "Red Roman, Chrysoblephus laticeps". The Southern African Sustainable Seafood Initiative. WWF. Retrieved April 16, 2012.
External links
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Wikimedia Commons has media related to Chrysoblephus laticeps. |
- Photo Gallery
- South African Journal of Science vol.105 no.9-10 Sept/Oct 2009
- Southern African Sustainable Seafood Initiative
- Image showing the prominent canines