| 词条 | Synodontis robertsi |
| 释义 |
| status = DD | status_system = IUCN3.1 | status_ref = [1] | genus = Synodontis | species = robertsi | authority = Poll, 1974 }}Synodontis robertsi, known as Robert's Synodontis,[2] or the large blotch Synodontis,[2] is a species of upside-down catfish that is endemic to the Democratic Republic of the Congo where it is only known from the Lukenie River.[4] It was first described by Max Poll in 1974. The original specimens were obtained in Elombe, on the Lukenie River in what is now the Democratic Republic of the Congo.[2] The species name robertsi is in honor of ichthyologist Tyson R. Roberts, who helped collect the type specimens.[6] DescriptionLike all members of the genus Synodontis, S. robertsi has a strong, bony head capsule that extends back as far as the first spine of the dorsal fin.[7] The head contains a distinct narrow, bony, external protrusion called a humeral process.[2] The fish has three pairs of barbels. The maxillary barbels are on located on the upper jaw, and two pairs of mandibular barbels are on the lower jaw.[9] The adipose fin is large and the tail, or caudal fin, is forked.[2] The front edges of the dorsal fins and the pectoral fins are hardened into stiff spines. These spines can be raised into position at right angles to the body and locked into position for defensive purposes.[11][12] The ability to lock the spines into place comes from several small bones attached to the spine, and once raised, the spines cannot be folded down by exerting pressure on the tip.[12] The fish has a structure called a premaxillary toothpad, which is located on the very front of the upper jaw of the mouth. This structure contains several rows of short, chisel-shaped teeth. On the lower jaw, or mandible, the teeth are attached to flexible, stalk-like structures and described as "s-shaped" or "hooked".[2][7] The maximum total length of the species is {{convert|10|cm|in|sp=us}}.[4] Generally, females in the genus Synodontis tend to be slightly larger than males of the same age. Habitat and behaviorIn the wild, the species is not often identified.[1] It is harvested for human consumption.[1] As a whole, species of Synodontis are omnivores, consuming insect larvae, algae, gastropods, bivalves, sponges, crustaceans, and the eggs of other fishes.[20] The reproductive habits of most of the species of Synodontis are not known, beyond some instances of obtaining egg counts from gravid females.[20] Spawning likely occurs during the flooding season between July and October, and pairs swim in unison during spawning.[22] The growth rate is rapid in the first year, then slows down as the fish age. References1. ^1 {{cite book | title = Catalogue of the fresh-water fishes of Africa in the British museum (Natural history) | author = Boulenger, George Albert | year = 1909 | url = https://archive.org/stream/cu31924024781837/#page/n407/mode/1up | publisher = British Museum | location = London | pages = 391}} [1][2][3][4][5][6][7][8][9][10]2. ^1 2 {{cite book | page = 406 | title = The Animal Kingdom Arranged in Conformity with its Organization, Volume 10 | author = Cuvier, Georges | publisher = Whittaker and Co. | location = London | year = 1934 | translator-first = Edward | translator-last = Griffith }} 3. ^1 {{cite web| url = http://www.etyfish.org/siluriformes8/ | title = Order SILURIFORMES: Families MALAPTERURIDAE, MOCHOKIDAE, SCHILBEIDAE, AUCHENOGLANIDIDAE, CLAROTEIDAE and LACANTUNIIDAE | publisher = The ETYFish Project | date = 12 Sep 2016 | author = Scharpf, Christopher | author2 = Kenneth Lazara | last-author-amp = yes | accessdate = 7 November 2016}} 4. ^1 2 {{Fishbase species | genus = Synodontis | species = robertsi| month = June | year = 2016}} 5. ^1 {{cite book|title = Fishes of the World|edition = Fifth | author= Nelson, Joseph | author2= T. Grande | author3= M. Wilson | last-author-amp= yes | publisher = John Wiley and Sons | year = 2016 | page = 227 }} 6. ^1 2 3 {{Cite journal | author = Moelants, T. | title = Synodontis robertsi | journal = The IUCN Red List of Threatened Species | volume = 2010 | page = e.T182504A7899437 | publisher = IUCN | date = 2010 | url = http://www.iucnredlist.org/details/182504/0 | doi = 10.2305/IUCN.UK.2010-3.RLTS.T182504A7899437.en | access-date = 15 January 2018}} 7. ^1 2 3 4 5 6 {{cite web | url =http://www.planetcatfish.com/common/species.php?species_id=558| title = Synodontis robertsi Poll, 1974 | publisher = Planet Catfish | date = 1 Nov 2014 | accessdate = 7 November 2016}} 8. ^1 2 {{cite book | title = Biological Micro- and Nanotribology | author = Scherge, M. | author2 = S. Gorb | author3 = S. Gorb | last-author-amp = yes | publisher = Springer Science & Business Media | pages = 97–98}} 9. ^1 {{cite web | url=http://tolweb.org/Mochokidae/15214 | title=Mochokidae Jordan 1923: African squeaker and suckermouth catfishes | author1=John P. Friel | author2=Thomas R. Vigliotta | lastauthoramp=yes | date=March 2, 2009 | accessdate=19 October 2016 | work=Tree of Life Web Project}} 10. ^1 2 {{cite journal | title = Taxonomic Revision of Lake Tanganyikan Synodontis (Siluriformes: Mochokidae) | author = Wright, J.J. | author2 = L.M. Page | last-author-amp = yes | journal = Florida Mus. Nat. Hist. Bull. | volume=46 | number = 4| year = 2006| pages=99–154}} }} External links{{Wikispecies-inline|Synodontis robertsi|Synodontis robertsi}}{{Taxonbar|from=Q3762090}} 6 : Synodontis|Freshwater fish of Africa|Fish of the Democratic Republic of the Congo|Endemic fauna of the Democratic Republic of the Congo|Taxa named by Max Poll|Fish described in 1974 |
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