1Jan

Azteca

1 Jan 2000admin

For 45 years, Azteca has made it a priority to provide our guests, our families, a safe place to come and enjoy a wonderful Mexican meal. Here at Azteca, we know everyone is concerned right now, and nothing is more important to us than the health and wellness of our customers and staff. Hyalella azteca is a widespread and abundant species of amphipod crustacean in North America.It reaches 3–8 mm (0.12–0.31 in) long, and is found in a range of fresh and brackish waters. It feeds on algae and diatoms and is a major food of waterfowl.

Hyalella azteca
Scientific classification
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H. azteca
Binomial name
Hyalella azteca

Hyalella azteca is a widespread and abundant species of amphipodcrustacean in North America. It reaches 3–8 mm (0.12–0.31 in) long, and is found in a range of fresh and brackish waters. It feeds on algae and diatoms and is a major food of waterfowl.

Description[edit]

Hyalella azteca grows to a length of 3–8 millimetres (0.12–0.31 in), with males being larger than females.[1] Their colour is variable, but the most frequent hues are white, green and brown.[1]

Distribution[edit]

Hyalella azteca is found across Central America, the Caribbean and North America,[2] as far north as the Arctic tree line.[1] It lives among vegetation in permanent bodies of freshwater, including lakes and rivers,[1] extending into tidal fresh water, and freshwater barrier lagoons.[2] It is 'the most abundant amphipod of lakes [in North America]',[3] with golf course ponds sometimes supporting large populations.

Ecology[edit]

In contrast to other species of Hyalella, H. azteca is extremely common and has wide ecological tolerances.[4] It can tolerate alkaline waters and brackish waters, but cannot tolerate a pH lower (more acidic) than 6.0.[4]

The main foodstuffs of H. azteca are filamentous algae and diatoms, although they may also consume organic detritus.[1] It cannot assimilate either cellulose or lignin, even though these biomolecules are a major component of the leaf litter.[5] It can, however, assimilate 60%–90% of the bacterialbiomass that it ingests.[5]

Hyalella azteca is an important food for many waterfowl. In Saskatchewan, 97% of the diet of female white-winged scoters was observed to be H. azteca, and it also makes up a significant part of the diet of lesser scaup.[6]

Life cycle[edit]

Hyalella azteca passes through a minimum of nine instars during its development.[4] Sexes can first be distinguished at the 6th instar, with the first mating occurring in the 8th instar. Subsequent instars, of which there may be 15–20, are considered adulthood.[4]

Uses[edit]

Hyalella azteca is used in various aquatic bioassays.[7] Because of their wide distribution, ease of captive reproduction, and its niche in lake sediments, Hyalella azteca is used in aquatic toxicology assays in sediments [8]

Taxonomic history[edit]

Hyalella azteca was first described by Henri Louis Frédéric de Saussure in 1858, under the name Amphitoe aztecus, based on material collected by Aztecs[9] from a 'cistern' near Veracruz, Mexico.[10] It has also been described under several junior synonyms, including:[11]

  • Hyalella dentataS. I. Smith, 1874
  • Hyalella fluvialisLockington, 1877
  • Hyalella inermisS. I. Smith, 1875
  • Hyalella knickerbockeriBate, 1862
  • Hyalella ornataPearse, 1911

When Sidney Irving Smith erected the genus Hyalella in 1874, H. azteca was the only included species, and therefore the type species.[12] The genus now includes dozens of species, mostly in South America.[12]

Persona 4 golden psn. H. azteca is now thought to represent a species complex, since there is little gene flow between populations, and different morphotypes are known to coexist in some areas.[9] Two local populations have been described as separate species – Hyalella texana from the Edwards Plateau of Texas, and Hyalella montezuma from Montezuma Well, Arizona.[9]

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References[edit]

  1. ^ abcde'Aquatic Invertebrates: Amphipods'. The Nature of the Rideau River. Canadian Museum of Nature. May 18, 2007. Retrieved October 5, 2010.
  2. ^ abMark D. Sytsma; Jeffery R. Cordell; John W. Chapman; Robyn C. Draheim (October 2004). 'Final Technical Report: Appendices'(PDF). Lower Columbia River Aquatic Nonindigenous Species Survey 2001–2004. United States Fish and Wildlife Service. Archived from the original(PDF) on June 4, 2010. Retrieved October 6, 2010.
  3. ^C. F. Mason (2002). 'Acidification'. Biology of Freshwater Pollution (4th ed.). Pearson Education. pp. 175–204. ISBN978-0-13-090639-7.
  4. ^ abcdDouglas Grant Smith (2001). 'Amphipoda'. Pennak's freshwater invertebrates of the United States: Porifera to Crustacea (4th ed.). John Wiley and Sons. pp. 569–584. ISBN978-0-471-35837-4.
  5. ^ abN. Kaushik (1975). 'Decomposition of allochthonous organic matter and secondary production in stream ecosystems'. Productivity of World Ecosystems: Proceedings of a Symposium Presented August 31–September 1, 1972, at the V General Assembly of the Special Committee for the International Biological Program, Seattle, Washington. United States National Academy of Sciences. pp. 90–95. ISBN978-0-309-02317-7.
  6. ^Gary L. Krapu; Kenneth J. Reinecke (1992). 'Foraging ecology and nutrition'. In Bruce D. J. Batt (ed.). Ecology and Management of Breeding Waterfowl. University of Minnesota Press. pp. 1–29. ISBN978-0-8166-2001-2.
  7. ^Robert Jay Goldstein; Rodney W. Harper; Richard Edwards (2000). 'Foods and feeding'. American Aquarium Fishes. Volume 28 of W. L. Moody, Jr., natural history series. Texas A&M University Press. pp. 43–51. ISBN978-0-89096-880-2.
  8. ^Nebeker, A; Miller, C. 'Use of the amphipod crustacean Hyalella azteca in freshwater and estuarine sediment toxicity tests'. EPA Science Inventory. Environmental Protection Agency. Retrieved 22 August 2017.
  9. ^ abcYihao Duan; Sheldon I. Guttman; James T. Oris; A. John Bailer (2000). 'Genetic structure and relationships among populations of Hyalella azteca and H. montezuma (Crustacea:Amphipoda)'. Journal of the North American Benthological Society. 19 (2): 308–320. doi:10.2307/1468073. JSTOR1468073.
  10. ^Exequiel R. Gonzalez & Les Watling; Watling (2002). 'Redescription of Hyalella azteca from its type locality, Vera Cruz, Mexico (Amphipoda: Hyalellidae)'. Journal of Crustacean Biology. 22 (1): 173–183. doi:10.1651/0278-0372(2002)022[0173:ROHAFI]2.0.CO;2. JSTOR1549618.
  11. ^J. Lowry (2010). J. Lowry (ed.). 'Hyalella azteca (Saussure, 1858)'. World Amphipoda database. World Register of Marine Species. Retrieved October 5, 2010.
  12. ^ abJ. Laurens Barnard (1969). 'The Families and Genera of Marine Gammaridean Amphipoda'. United States National Museum Bulletin. 271: 1–535.

Further reading[edit]

  • John Janovy (2001). 'Hyalella azteca'. Dunwoody Pond: Reflections on the High Plains Wetlands and the Cultivation of Naturalists. University of Nebraska Press. pp. 150–167. ISBN978-0-8032-7616-1. Once upon a time we went to a roadside ditch. There was Hyalella azteca. Then we went to a river. There, too, was Hyalella azteca.
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Hyalella_azteca&oldid=931470711'

Azteca

Azteca was an American Latin rock/jazz fusion group formed in 1972, started by percussionists Coke Escovedo and his brother Pete Escovedo, who had just finished stints with Latin rock pioneering band Santana. Azteca was the first large-scale attempt to combine multiple musical elements in the context of a Latin orchestra setting, and featured horns, woodwinds, multiple keyboards, three vocalists, guitars, drums, and multiple Latin percussionists.Onstage, the band consisted of between 15 and 25 members, and toured with acts including Stevie Wonder. Other notable Azteca alumni included vocalists Wendy Haas and Errol Knowles, guitarist Neal Schon, trumpeter Tom Harrell, bassist Paul Jackson, drummers Lenny White & John H. Brinck Jr., and percussionist Victor Pantoja. The group was also a musical starting point for Latin percussionist Sheila E., who appeared with the band as a teenager. Two albums were released on Columbia Records, the self-titled Azteca and Pyramid of the Moon, before the band split up.On September 15, 2007, a number of the surviving members of Azteca performed together for the first time in more than thirty years in Hollywood, California.