INVARIANT CORRELATION WITH SPECIES-SPECIFIC COMPOSITE FILTERS FOR THE RECOGNITION OF TRICHODINIDS (CILIOPHORA: PERITRICHIDA) PARASITIZING OREOCHROMIS NILOTICUS (LINNAEUS, 1758) BASED ON MORPHOLOGICAL METHODS

Authors

  • Maria Amparo Rodríguez-Santiago Consejo Nacional de Ciencia y Tecnología (CONACYT), Ciudad de México, México. / Facultad de Ciencias Naturales, Universidad Autónoma del Carmen. C.P. 24155, Ciudad del Carmen, Campeche, México.
  • Josué Álvarez-Borrego Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, B. C., México.
  • Emma Josefina Fajer-Ávila Centro de Investigación en Alimentación y Desarrollo, A. C., Unidad Mazatlán en Acuicultura y Manejo Ambiental. Mazatlán, Sinaloa, C. P. 82010, México
  • José Alberto Iannacone Oliver Universidad Nacional Federico Villarreal (UNFV). Facultad de Ciencias Naturales y Matemática. Laboratorio de Ecología y Biodiversidad Animal. Grupo de Investigación y Sostenibilidad Ambiental. Escuela Universitaria de Post Grado. Lima, Perú. / Universidad Científica del Sur (UCSUR). Facultad de Ciencias Ambientales. Lima, Perú.
  • Cynthia Nayeli Fernandez-Martínez Facultad de Ciencias Naturales, Universidad Autónoma del Carmen. C.P. 24155, Ciudad del Carmen, Campeche, México.

DOI:

https://doi.org/10.24039/rnh20211521223

Keywords:

Trichodina, Oreochromis niloticus, taxonomy, automatic systems, invariant correlation

Abstract

Trichodinids are the most common ectoparasites of both freshwater and marine fishes. Their generic identification is relatively easy, while the specific diagnosis is laborious due to the high intraspecific variability of some species. Four species of the genus Trichodina from the skin and fins of Oreochromis niloticus (Linnaeus, 1758) Egyptian black variety were identified by means of morphological methods and the use of digital correlation invariant to position, rotation and scale by species specific composite filters. Trichodina magna Van As Bassson, 1989 and Trichodina nigra Lom, 1961 represent new records of host and geographic location, while Trichodina centrostrigata Van As, Basson & Van As, 1998 and Trichodina heterodentata Duncan, 1977, have already been reported for O. niloticus in Mexico. The automatic identification of the four species studied was done through the development and application of a mathematical algorithm within a recognition process of objects (invariant digital correlation), based on the frequency contents of the parasite species. This algorithm essential characteristic is its use to recognize the object in spite of the fact that its location level has changes of position, rotation and scale.

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Published

2021-10-14

How to Cite

Rodríguez-Santiago, M. A. ., Álvarez-Borrego, J. ., Fajer-Ávila, E. J. ., Iannacone Oliver, J. A., & Fernandez-Martínez, C. N. . (2021). INVARIANT CORRELATION WITH SPECIES-SPECIFIC COMPOSITE FILTERS FOR THE RECOGNITION OF TRICHODINIDS (CILIOPHORA: PERITRICHIDA) PARASITIZING OREOCHROMIS NILOTICUS (LINNAEUS, 1758) BASED ON MORPHOLOGICAL METHODS. Neotropical Helminthology, 15(2), 179–191. https://doi.org/10.24039/rnh20211521223

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