Brook lamprey

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Brook lamprey
Sorgenti del Pescara 21 (RaBoe).jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Infraphylum: Agnatha
Class: Hyperoartia
Order: Petromyzontiformes
Family: Petromyzontidae
Genus: Lampetra
Species:
L. planeri
Binomial name
Lampetra planeri
(Bloch 1784)
Synonyms [2] [3]
  • Petromyzon planeriBloch 1784
  • Petromyzon septoeuilLacepède 1802
  • Petromyzon nigerLacepède 1802
  • Petromyzon bicolorShaw 1804
  • Petromyzon plumbeusShaw 1804
  •  ?Petromyzon caecusCouch 1832
  • Petromyzon anomalumDe la Pylaie 1835
  • Petromyzon fluviatilis f. minorSmitt 1895
  • Petromyzon fluviatilis f. larvalisSmitt 1895
  • Ammocoetes lamproyonRömer-Büchner 1927

The brook lamprey (Lampetra planeri), also known as the European brook lamprey and the western brook lamprey is a small European lamprey species that exclusively inhabits freshwater environments. The species is related to, but distinct from, the North American western brook lamprey ( Lampetra richardsoni ).

Contents

Description

Close-up of a brook lamprey's anterior body. Beekprik (Lampetra planeri).png
Close-up of a brook lamprey's anterior body.

The brook lamprey is a common, non-parasitic species that is endemic to Europe. [1] Adult brook lampreys measure from 12 to 14 cm (4.7 to 5.5 in). The body is highly elongated and dark blue or greenish above, lightening to yellowish off-white on the sides and pure white on the ventral side. Like all lampreys, these fish lack paired fins and possess a circular sucking disc instead of jaws, which is filled with blunt teeth. They have a single nostril and seven small gill openings on either side behind the eye. The brook lamprey can be told from the closely related river lamprey ( Lampetra fluviatilis ) by the fact that its two dorsal fins are more closely linked together. [4]

Distribution

Brook lampreys can be found in small streams and larger rivers throughout northern Europe as well as Portugal, southern France, Italy, Sardinia, the Balkans and the upper reaches of the Volga.

Biology

Unlike some species of lamprey, the adults do not migrate to the sea and do not have a parasitic phase. During the spawning time adult brook lampreys do not feed. Brook lampreys spawn in spring and summer in shallow areas of streams and sometimes lakes in gravel close to the soft sediment in which they were previously resident. Both males and females create pits by removing small rocks with their mouths and fanning smaller particles with their tails. The male and female deposit sperm and eggs, simultaneously while intertwined, into the nest. The female can release several thousand eggs, up to 100,000 for some species. Adult brook lamprey spawn in small groups and die soon after spawning. [5]

The eggs hatch within a few days, after which the young larvae bury themselves in soft sediment with only the mouth protruding. The young lampreys are blind filter feeders, feeding on detritus and other organic matter for three to five years before maturing. After spending four years as ammocoetes (Larva), these lampreys metamorphose to adults in the fall and spawn the following spring. This process is complete after the maturation of the gonads. Eyes and suction disk also develop during this time, while the intestinal tract degenerates and loses its function. The full transformation can take up to a year. Thus, these fish develop their teeth precisely when they are no longer able to eat. However, lampreys have been observed gripping stones with their teeth [6] in order to build nests, showing that the teeth do have a function.

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References

  1. 1 2 Freyhof, J. (2016) [errata version of 2011 assessment]. "Lampetra planeri". IUCN Red List of Threatened Species . 2011: e.T11213A97806694. doi: 10.2305/IUCN.UK.2008.RLTS.T11213A3262868.en . Retrieved 4 April 2024.
  2. Van Der Laan, Richard; Eschmeyer, William N.; Fricke, Ronald (11 November 2014). "Family-group names of Recent fishes". Zootaxa. 3882 (1): 1–230. doi: 10.11646/zootaxa.3882.1.1 . PMID   25543675.
  3. Froese, R.; Pauly, D. (2017). "Petromyzontidae". FishBase version (02/2017). Retrieved 18 May 2017.
  4. "Brook lamprey: Lampetra planeri". NatureGate. Retrieved 2013-12-15.
  5. "Lampreys" (PDF). Adfg.alaska.gov. Retrieved 2022-03-17.
  6. Young, Robert T.; Cole, Leon J. (1900). "On the Nesting Habits of the Brook Lamprey (Lampetra Wilderi)". The American Naturalist. 34 (404): 617–620. doi: 10.1086/277735 . hdl: 2027/hvd.32044107207904 .

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