Paramormyrops hopkinsi (Taverne & Thys van den Audenaerde, 1985)
EOL Text
A large, head-positive peak, P1, which reaches about 75% of the peak to peak height, is followed by a small head-negative peak, P2, which is only 25% of the peak-peak height. Following P2, the voltage trace returns toward baseline, but then with a delay of three to six msec shows another characteristic head-negative peak. Female EODs tend to be shorter than males but the overall waveform is the same. The average duration of EOD pulses is 4.32 msec for all fish tested. The power spectrum of the EOD peaks at 0 Hz (i.e. D.C.) as expected for pulses that are predominantly monophasic. The electric organ has electrocytes with non-penetrating stalks innervated on the posterior surface. A second variant EOD has been observed in populations of P. hopkinsi from the Ivindo River.
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| Rights holder/Author | Sullivan, John P., Sullivan, John P., Hopkins, Carl D., Africhthy |
| Source | http://mormyrids.lifedesks.org/pages/2029 |
Red List Criteria
Version
Year Assessed
Assessor/s
Reviewer/s
Contributor/s
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | International Union for Conservation of Nature and Natural Resources |
| Source | http://www.iucnredlist.org/apps/redlist/details/181703 |
Population
Population Trend
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| Rights holder/Author | International Union for Conservation of Nature and Natural Resources |
| Source | http://www.iucnredlist.org/apps/redlist/details/181703 |
Major Threats
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | International Union for Conservation of Nature and Natural Resources |
| Source | http://www.iucnredlist.org/apps/redlist/details/181703 |
Vulnerable (VU) (B2ab(iii))
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Armi G. Torres, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=51274 |
A medium-sized Paramormyrops with a slender, laterally compressed body and a narrow, distinctly V-shaped snout when viewed from above the head. Body depth 17.9–21.2% SL. Head length 25–32% SL; snout length 6.0–7.1% SL. Mouth subterminal. Both anal and dorsal fins terminate at about the same level. Dorsal, 17–19 rays; anal, 24–26 rays. Teeth: seven in upper jaw, eight (rarely nine) in lower. Lateral line scales 53–58 total. The angle subtended by the head width measured at the opercular bone to the tip of the snout, is 18–21°. The angle subtended by the snout, measured between the eyes to the tip of the snout, is 34-44°. The dorsal profile of the head is downward sloping and concave or straight.
The fish is dark chocolate-brown overall, lighter on the belly. The fins are dark brown.
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | Sullivan, John P., Sullivan, John P., Hopkins, C.D., Africhthy |
| Source | http://mormyrids.lifedesks.org/pages/2029 |
Conservation Actions
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | International Union for Conservation of Nature and Natural Resources |
| Source | http://www.iucnredlist.org/apps/redlist/details/181703 |
A Lower Guinea endemic common in the Ivindo River of Gabon, the type locality. It is also reported from the lower Ntem River of Cameroon, although it is considered rare.
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | International Union for Conservation of Nature and Natural Resources |
| Source | http://www.iucnredlist.org/apps/redlist/details/181703 |
Paramormyrops hopkinsi is a species of freshwater electric fish. It was discovered in the Ivindo River in Gabon, in Western Africa by Dr. Carl D. Hopkins of Cornell University.[1][3][4] It lives in a tropical climate.[2]
References
- ^ a b Integrated Taxonomic Information System (2004). "Brienomyrus hopkinsi Taverne and Thys van den Audenaerde, 1985". Integrated Taxonomic Information System. http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=649941. Retrieved September 27, 2007.
- ^ a b *Froese, Rainer, and Daniel Pauly, eds. (2011). "Paramormyrops hopkinsi" in FishBase. June 2011 version.
- ^ Cornell University. "Hopkins Lab, Department of Neurobiology & Behavior, Cornell University". Cornell University. http://www.nbb.cornell.edu/neurobio/hopkins/research.htm. Retrieved September 27, 2007.
- ^ Cornell University (1998). "The Biodiversity of Freshwater Fish in Gabon Rainforests, One Hundred Years After Mary H. Kingsley". Cornell University Department of Neurobiology and Behavior. http://www.nbb.cornell.edu/neurobio/hopkins/mkingsley.html. Retrieved September 27, 2007.
Sources
- Cornell University (1998). "Brienomyrus hopkinsi - Photo by Dr. Carl D. Hopkins". Cornell University Department of Neurobiology and Behavior. http://www.nbb.cornell.edu/neurobio/hopkins/images/hopkinsi.jpg. Retrieved September 27, 2007.
- CTD's Brienomyrus hopkinsi page from the Comparative Toxicogenomics Database
- UniProt Taxonomy (2007). "Species Brienomyrus hopkinsi". UniProt Consortium. http://beta.uniprot.org/taxonomy/112141. Retrieved September 27, 2007.
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| License | http://creativecommons.org/licenses/by-sa/3.0/ |
| Rights holder/Author | Wikipedia |
| Source | http://en.wikipedia.org/w/index.php?title=Paramormyrops_hopkinsi&oldid=459480079 |
Africa: Ivindo River in Gabon and Ntem River in Cameroon (Ref. 81635).
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Armi G. Torres, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=51274 |