Occurrence of neoechinorhynchus sp. (Acanthocephala: Neoechinorhynchidae) in cultured tilapia, [Oreochromis niloticus (L.), perciformes: Ciclidae] from sampaloc lake, Philippines
Abstract
Cultured tilapias (Oreochromis niloticus L.)were sampled from Sampaloc Lake, Philippines with 42% (38 out of 90) found infected with mature forms of acanthocephalan parasite in the intestine. Results showed that season had a significant influence on the proportion of infected fish (c2 = 19.15, p<0.05) with the prevalence being higher during dry season with 58% (35 out of 60) compared to rainy season with 10% (3 out of 30).This finding suggests the seasonal occurrence of mature acanthocephalan worm in O. niloticus. However, there was no significant difference in the mean intensity between dry (4.31±3.68) and rainy (4.00±2.00) seasons. Infection intensity had a significant positive correlation with length and weight (r = 0.63 and 0.65, respectively, p<0.05) of infected fish. However, there was no significant association between infection intensity and fish condition index. Scanning electron microscopy revealed the number and arrangement of proboscis hooks; hence, classifying the acanthocephalan specimens as belonging to genus Neoechinorhynchus. Specimens were distinguishable with short, globular proboscis armed with 18 hooks radially arranged in 3 circles with 6 hooks each. The anterior hooks with mean length of 36.54±4.61 μm and the middle and posterior shorter hooks (10.95±1.87 μm) were the most reliable basis for identification to genus level. ©Rushing Water Publishers Ltd. 2012.
Source or Periodical Title
Asia Life Sciences
ISSN
1173375
Page
287-298
Document Type
Article
Subject
Acanthocephala, Cultured tilapia, Endoparasite, Infection intensity, Neoechinorhynchus, Oreochromis niloticus, Philippines, Sampaloc lake
Recommended Citation
de la Cruz, Christian Paul P. and Paller, Vachel Gay V., "Occurrence of neoechinorhynchus sp. (Acanthocephala: Neoechinorhynchidae) in cultured tilapia, [Oreochromis niloticus (L.), perciformes: Ciclidae] from sampaloc lake, Philippines" (2021). Journal Article. 2311.
https://www.ukdr.uplb.edu.ph/journal-articles/2311