AI Article Synopsis
- The genus Anableps includes three species, known for their unique eyes and surface-dwelling habits in brackish water.
- A study investigated endoparasites in Anableps anableps from the ParnaÃba Delta, finding third larval stage Contracaecum sp. in the pancreas.
- This research marks the first identification of endoparasitism in A. anableps and the first record of nematodes in four-eyed-fish.
Article Abstract
The genus Anableps is composed of species Anableps anableps, Anableps dowi, and Anableps microlepis. These fishes are tropical and usually live on the surface of brackish water, being popularly known as four-eyed-fishes due to the presence of prominent eyes and a pupil split horizontally. A. anableps and A. microlepis are considered as sister species that live in sympatry in South America. A. dowi, however, is restricted to the Pacific Ocean (Central America) and is considered the most primitive species of this genus. The aims of this study were to investigate the presence of endoparasites in A. anableps from the ParnaÃba's Delta and characterize them morphologically. During the necropsy, larvae of Contracaecum sp. in the third larval stage (L3) were collected from the pancreas of A. anableps, but no endoparasites were observed in other organs. The worms had a cuticular tooth and excretory pore located at the anterior end, a thread like body, whitish color, and without distinction of sex. The length of the ventricular appendix of the larvae was much greater than in other studies. This is the first report of endoparasitism in A. anableps and the first report of nematodes in four-eyed-fishes.
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| http://dx.doi.org/10.1007/s00436-017-5528-5 | DOI Listing |
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