Saprolegnia sp. (Fungi: Saprolegniaceae) isolation from Onchorhyncus mykiss (Pisces: Salmonidae) “rainbow trout” culture

Authors

  • Libertad Alzamora Laboratorio de Inmunología Parasitaria y Epidemiología. Facultad de Ciencias Biológicas, Universidad nacional Mayor de San Marcos Lima-Perú.
  • Julia Castro Laboratorio de Inmunología Parasitaria y Epidemiología. Facultad de Ciencias Biológicas, Universidad nacional Mayor de San Marcos Lima-Perú.

DOI:

https://doi.org/10.15381/rpb.v6i2.8308

Keywords:

Saprolegnia, aquaculture, Onchorhyncus mykiss, alevines, Cucurbita maxima

Abstract

The objective of the study was to determine the infectious origin of the alevines mortality and lesions observed in adults of Oncorhynchus mykiss Walbaum 1792, "rainbow trout", in the fishfarm "El Ingenio" using a simple and effective methodology. Alevines, eggs and adult forms and samples of water from ponds were collected. These samples were cultivated on seeds of Cucurbita maxima "calabash" as substrate, where typical colonies had been developing alter seven days. Microscopic characteristics of the hyphae fitted the graphic pattern of Saprolegnia sp. (fungi), which is related to the symptomatology observed in the captured adults. The presence of Saprolegnia sp. would be related to high mortality of alevines registered (40%), probably for importation of eggs contaminated with the fungi. The method was efficient because the substrate has permitted the development 01 the fungi for an easy and cheaply application.

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Published

12/13/1999

Issue

Vol. 6 No. 2 (1999)

Section

Articles

License

Copyright (c) 1999 Libertad Alzamora, Julia Castro

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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

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c. Authors retain theirs right to make a subsequent publication of their work, to use the article or any part thereof (eg a compilation of his papers, lecture notes, thesis, or a book), always indicating its initial publication in the Revista Peruana de Biologia (the originator of the work, journal, volume, number and date).

How to Cite

Alzamora, Libertad, and Julia Castro. 1999. “Saprolegnia Sp. (Fungi: Saprolegniaceae) Isolation from Onchorhyncus Mykiss (Pisces: Salmonidae) ‘rainbow trout’ Culture”. Revista Peruana De Biología 6 (2): 137-42. https://doi.org/10.15381/rpb.v6i2.8308.