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Russian Journal of Biological Invasions

, Volume 10, Issue 4, pp 365–369 | Cite as

Downstream Migration of Juvenile Fish Associated with the Drift of Water Hyacinth (Eichhornia crassipes)

  • V. K. NezdolyEmail author
  • D. S. PavlovEmail author
Article

Abstract

Passive downstream migration of juvenile fish associated with the invasive water hyacinth (Eichhornia crassipes) was investigated in the delta of the Mekong River. The behavioral program of juveniles aimed at leaving the coastal attached vegetation and entering the transit flow for migration was the same in the case with drifting water hyacinth. In general, the passive downstream migration has three components: the drifting of juveniles with thickets of water hyacinth; the entry of juveniles into the transit flow from coastal biotopes during the twilight-nocturnal period; the entry of juveniles into the transit flow from thickets of drifting hyacinth during the twilight-nocturnal period. It should be noted that downstream migrations of juvenile fish associated with drifting water hyacinth in the Mekong Delta may end by their mass death in salt water after reaching the sea with floating hyacinth.

Keywords:

Eichhornia crassipes, water hyacinth, downstream migration juvenile fish drift the Mekong River 

Notes

ACKNOWLEDGMENTS

We are profoundly grateful to V.V. Mikheev, V.V. Kostin, and to P.I. Kirillov for valuable remarks on the manuscript.

FUNDING

The material was collected under support and organizational aid by the Joint Russian-Vietnamese Tropical Research and Technological Center. Processing of the material and preparation of the article were supported by the Russian Science Foundation (project no. 19-14-00015).

CONFLICTS OF INTEREST

The authors declare that they have no conflicts of interest.

COMPLIANCE WITH ETHICAL STANDARDS

The article does not contain investigations involving experiments on animals performed by any of the authors.

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  1. 1.Severtsov Institute of Ecology and Evolution, Russian Academy of SciencesMoscowRussia
  2. 2.Russian-Vietnamese Tropical Research and Technological CenterMoscowRussia

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