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Parechinus Angulosus
''Parechinus angulosus'', the Cape urchin, is a sea urchin in the family Parechinidae endemic to southern Africa. Synonyms *''Cidaris angulosus'' Leske, 1778 *''Cidaris angulosus minor'' Leske, 1778 *''Echinus angulosus minor'' (Leske, 1778) *''Echinus minimus'' Blainville, 1825 *''Echinus subangulosus'' Lamarck, 1816 *''Parechinus angulosus pallidus'' H.L. Clark *''Parechinus annulatus'' (Mortensen, 1909) *''Protocentrotus angulosus'' (Leske, 1778) *''Protocentrotus annulatus'' Mortensen, 1909 *''Psammechinus subangulosus'' (Lamarck, 1816) Description Test round, diameter up to 60 mm, with a dense covering of short sharp spines which do not exceed 20% of test diameter. Test colour usually green, spines purple, but also green, red or off-white. Distribution Lüderitz to Durban, intertidal to about 100 m. Natural history Grazes on seaweeds, and population density affects the rate of kelp settlement. Provides shelter for juvenile abalone ''Haliotis midae'' and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animalia
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, annelids and molluscs, and the deuterostomes, containing the echinode ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinodermata
An echinoderm () is any member of the phylum Echinodermata (). The adults are recognisable by their (usually five-point) radial symmetry, and include starfish, brittle stars, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or "stone lilies". Adult echinoderms are found on the sea bed at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates. Echinoderms are the largest entirely marine phylum. The first definitive echinoderms appeared near the start of the Cambrian. The echinoderms are important both ecologically and geologically. Ecologically, there are few other groupings so abundant in the biotic desert of the deep sea, as well as shallower oceans. Most echinoderms are able to reproduce asexually and regenerate tissue, organs, and limbs; in some cases, they can undergo complete regeneration from a single limb. Geolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parechinidae
The Parechinidae are a family of sea urchins in the class Echinoidea. Characteristics All camarodonts have imperforate tubercles and compound ambulacral plates. In addition, the characteristics of the parechinids include the interambulacral plates being densely covered with tubercles with many subequal tubercles, and the buccal notches being insignificant in size. The globiferous pedicellaria A pedicellaria (plural: pedicellariae) is a small wrench- or claw-shaped appendage with movable jaws, called valves, commonly found on echinoderms (phylum Echinodermata), particularly in sea stars (class Asteroidea) and sea urchins (class Echi ...e between the spines have widely open blades each with many lateral teeth. The Natural History Museum. Retrieved 2011-08-25. < ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lüderitz
Lüderitz is a town in the ǁKaras Region of southern Namibia. It lies on one of the least hospitable coasts in Africa. It is a port developed around Robert Harbour and Shark Island. The town is known for its colonial architecture, including some Art Nouveau work, and for wildlife including seals, penguins, flamingos and ostriches. It is also home to a museum, and lies at the end of a decommissioned railway line to Keetmanshoop. The town is named after Adolf Lüderitz, founder of the German South West Africa colony. Economy and infrastructure The centre of Lüderitz' economic activity is the port, until the incorporation of the exclave Walvis Bay in 1994 the only suitable harbour on Namibia's coast. However, the harbour at Lüderitz has a comparatively shallow rock bottom, making it unusable for many modern ships. The recent addition of a new quay has allowed larger fishing vessels to dock at Lüderitz. The town has also re-styled itself in an attempt to lure tourists t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Durban
Durban ( ) ( zu, eThekwini, from meaning 'the port' also called zu, eZibubulungwini for the mountain range that terminates in the area), nicknamed ''Durbs'',Ishani ChettyCity nicknames in SA and across the worldArticle on ''news24.com'' from 25 October 2017. Retrieved 2021-03-05.The names and the naming of Durban Website ''natalia.org.za'' (pdf). Retrieved 2021-03-05. is the third most populous city in after and |
Haliotis Midae
''Haliotis midae'', known commonly as the South African abalone or the perlemoen abalone, is a species of large sea snail, a marine gastropod mollusk in the family Haliotidae, the abalones. Subspecies * ''Haliotis midae volcanius'' Patamakanthin & Eng, 2007 Description The size of the shell varies between . "The large shell has a rounded-oval shape and is moderately convex. The distance of the apex from the margin about equals one-fifth the greatest length of the shell. The body whorl is strongly angled at the position of the perforations, perpendicularly descending from the angle to the columellar margin. The surface shows strong, elevated, radiating wrinkles or lamellae, but no spiral markings when adult. The 6 to 11 perforations are small, subcircular, and separated by spaces greater than their own diameter. The two sides are about equally curved. The convexity varies with age. The color of the shell is yellowish-gray. The folds are usually stained with coral-red. The su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kelp Forest
Kelp forests are underwater areas with a high density of kelp, which covers a large part of the world's coastlines. Smaller areas of anchored kelp are called kelp beds. They are recognized as one of the most productive and dynamic ecosystems on Earth.Mann, K.H. 1973. Seaweeds: their productivity and strategy for growth. Science 182: 975-981. Although algal kelp forest combined with coral reefs only cover 0.1% of Earth's total surface, they account for 0.9% of global Primary production, primary productivity. Kelp forests occur worldwide throughout temperate and polar region, polar coastal oceans. In 2007, kelp forests were also discovered in tropical waters near Ecuador.Graham, M.H., B.P. Kinlan, L.D. Druehl, L.E. Garske, and S. Banks. 2007. Deep-water kelp refugia as potential hotspots of tropical marine diversity and productivity. Proceedings of the National Academy of Sciences 104: 16576-16580. Physically formed by brown macroalgae, kelp forests provide a unique habitat for m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jasus Lalandii
''Jasus lalandii'', the Cape rock lobster or West Coast rock lobster, is a species of spiny lobster found off the coast of Southern Africa. It is not known whom the specific epithet ''lalandii'' commemorates, although it may the French naturalist and taxonomer Pierre Antoine Delalande. Distribution ''Jasus lalandii'' occurs in shallow waters from Cape Cross, Namibia to Algoa Bay, South Africa, straddling the Cape of Good Hope. It may be found as deep as and is usually found on rocky bottoms. Culinary use It is called ''crayfish'' ( af, kreef) and is often braaied, particularly in the coastal areas along its range, however overfishing has depleted stocks. Description Jasus lalandii - Annals of the South African Museum (1950) (18412149782).jpg, Larval forms Orange to red-brown, with long antennae extending from the front of the head. Tail fan orange, blue and green. Thorax spiny. Eyes black and stalked.Jones, Georgina. ''A field guide to the marine animals of the Cape Penins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
