Black band saw tetra

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Black band saw tetra
Serrasalmus spilopleura by OpenCage.jpg

Black-banded Sägesalmler ( Serrasalmus spilopleura )

Systematics
Otophysa
Order : Tetras (Characiformes)
Family : Sägesalmler (Serrasalmidae)
without rank: Piranhas
Genre : Serrasalmus
Type : Black band saw tetra
Scientific name
Serrasalmus spilopleura
( Kner , 1858)

The black-banded Sägesalmler ( Serrasalmus spilopleura ) is a species of piranha that is native to tropical waters of South America. It is called “Pirambeba Dourada”, “Piranha Negra” in Portuguese and “Palomita” in Spanish.

description

Serrasalmus spilopleura has a diamond-shaped body. It is colored dark blue or black-gray on the back and has numerous silvery, strongly iridescent scales . The underside of the head can be colored bright red and the underside of the abdomen yellow. The species is characterized by a black sideband. The Schwarzband-Sägesalmler is on average 18 centimeters tall.

distribution and habitat

The black band Sägesalmler was first from the Rio Guaporé , an Amazon - tributary described. It is common throughout the Amazon basin and Rio Paraná . It can be found in Argentina , Brazil , French Guiana , Guiana , Suriname , Uruguay and Venezuela . The Schwarzband-Sägesalmler prefers water temperatures of 23 to 28 ° C with pH values of 5 to 7.

Way of life

Larger specimens of the black-banded Sägesalmler are mostly solitary , which distinguishes them from other piranha species. Only for hunting and reproduction do they come together in groups consisting of individuals of the same age and size. The fish are active during the day and at dusk. During the dry season, the animals also eat plant seeds. Another typical behavior pattern of black-banded tetras is that they hide in the aquatic vegetation, attack fish swimming by and bite off their fins. In the Sanchuri reservoir on the Rio Uruguay in southern Brazil, the effects of numerous chemical and physical factors on the local population of Serrasalmus spilopleura were investigated. In the Rio Paranaíba the influence of environmental factors on the fertility of Serrasalmus spilopleura was examined . The species is sexually mature with a body length of 17 centimeters.

Black band saw tetra and human

No fatal attacks on people have been observed. It was reported from the Brazilian state of Mato Grosso that the partially scavenging fish ate drowned people in some cases. Black- banded tetras find ideal living conditions for building up large populations in the reservoirs of the state of São Paulo (Santa Cruz de Conceição / Rio Mogi-Guacu as well as Itapui and Iacanga on the Rio Tiete ); accidents involving bathers increased in 2002 and 2003 . The animals prefer to spawn in shallow water areas under water hyacinths and defend their clutch against predators. If a person comes too close to their clutch, in some cases they will be attacked and may suffer painful bite injuries.

use

Black-banded Sägesalmler are local food fish and sport fish for anglers. As aquarium fish, they are less suitable for community aquariums , as they often bite the fins of other fish.

literature

  • WL Fink: Revision of the piranha genus Pygocentrus (Teleostei, Characiformes). In: Copeia. 1993 (no. 3), pp. 665-687.
  • M. Cavicchioli, K. Nakatani, OAShibatta: Morphometric variation of larvae and juveniles of the piranhas Serrasalmus spilopleura and S. marginatus (Characidae: Serrasalminae) of the Paraná basin, Brazil. In: Ichthyol. Explor. of Freshwaters. 1997, Vol. 8 (2), pp. 97-106.
  • L. Centofante, JIR Porto, E. Feldberg: Análise cromossômica na espécie de piranha Serrasalmus spilopleura (Characiformes, Serrasalmidae) do lago Catalão, Amazonas. Resumos do I Simpósio de Pós-Graduação do INPA / FUA: 14, 1994.

Web links

Notes and individual references

  1. ↑ [1]
  2. ↑ a b c d e Pirambeba Dorada or Piranha Negra also simply called Spilo Serrasalmus spilopleura.
  3. ↑ a b Schwarzband-Sägesalmler on Fishbase.org (English)
  4. ↑ Serrasalmus spilopleura. ( Memento of the original from May 25, 2012 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. on: diskusmann.de @1@ 2Template: Webachiv / IABot / www.diskusmann.de
  5. ↑ C. Rodrigo, P. Beheregaray: Biological Aspects of the Piranha Serrasalmus spilopleura (Characidae) in Uruguaiana County, west of Rio Grande do Sul, Brazil. Dissertação de Mestrado aprovada pela PUCRS em 2001 com o título: Aspectos da biologia da piranha Serrasalmus spilopleura (Characidae) no Município de Uruguaiana, oeste do Estado do Rio Grande do Sul, Brazil. Porto Alegre - RS - Brazil
  6. ↑ Ivana Reis Lamas, Alexandre Lima Godinho: Reproduction in female Serrasalmus spilopleura (Characiformes, Characidae) from the Itumbiara reservoir (18 ° 28 S, 48 ° 36 W). Department of Zoology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, 31270-901 MG, Brazil Synopsis.
  7. ^ I. Sazima, S. Guimaraes: Scavenging on human corpses as a source for stories about man-eating piranhas. In: Environmental Biology of Fishes. 20 1987, pp. 75-77. (on-line)
  8. ^ Vidal Haddad, Ivan Sazima: Piranha Attacks on Humans in Southeast Brazil: Epidemiology, Natural History, and Clinical Treatment, With Description of a Bite Outbreak. 2003 (abstract)
  9. ↑ Piranha increase 'due to dams.
  10. ^ Vidal Haddad, Ivan Sazima: Piranha attacks in dammed streams used for human recreation in the State of São Paulo, Brazil. on: scielo.br