1
|
da Silva DT, da Silva MF, Lima AM, Matos PS, de Carvalho Sanches O, Matos ER, Hamoy IG. Utrastructure and molecular phylogeny of the myxozoan Kudoa ocellatus n. sp. (Myxozoa: Kudoidae), a parasite of the Oscar, Astronotus ocellatus (Agassiz, 1831; Teleostei: Cichlidae), a fish from northern Brazil. Parasitol Int 2021; 86:102472. [PMID: 34597759 DOI: 10.1016/j.parint.2021.102472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 09/23/2021] [Accepted: 09/23/2021] [Indexed: 11/25/2022]
Abstract
Kudoa ocellatus n. sp. was found in the musculature of Astronotus ocelattus (Agassiz, 1831) from the Arari River on Marajó Island in Pará, Brazil. The new species forms pseudocysts in the epaxial and hypaxial musculature composed of various spores that are pseudoquadrate in the apical view. In the lateral view, the spores were triangular or pyramidal. In the lateral view, the spores were 46 ± 0.11 μm (4.5-4.8) in length and 6.6 ± 0.3 μm (6.2-7.2) in width, with four pyriform polar capsules of equal size that measured 2.0 ± 0.16 μm (1.8-2.2) in length and 1.5 ± 0.18 μm (1.3-1.8) in width. Based on the partial (1418 bps) sequence of the SSU rDNA gene, Kudoa ocellatus n. sp. was distinct from all the other Kudoa species deposited in GenBank. The phylogenetic Bayesian Inference and P distance placed the new species together with the other Kudoa species that parasitize freshwater Amazonian fish. The morphological evidence, together with the SSU rDNA gene sequence, supported the description of Kudoa ocellatus n. sp., a distinct new species of the genus, which parasitizes a freshwater Amazonian cichlid.
Collapse
Affiliation(s)
- Diehgo Tuloza da Silva
- Postgraduate program in biology of infectious and parasitic agents (BAIP), Federal University of Pará (UFPa), Belém, PA, Brazil; Carlos Azevedo Research Laboratory, Federal Rural University of the Amazon (UFRA), Belém, PA, Brazil
| | - Marcelo Francisco da Silva
- Ecology and Limnology Laboratory - LEL, State University of Tocantina Region of Maranhão - UEMASUL, Imperatriz, MA, Brazil
| | | | - Patricia Santos Matos
- Postgraduate program in biology of infectious and parasitic agents (BAIP), Federal University of Pará (UFPa), Belém, PA, Brazil; Carlos Azevedo Research Laboratory, Federal Rural University of the Amazon (UFRA), Belém, PA, Brazil
| | - Osimar de Carvalho Sanches
- Graduate Program in Veterinary Medicine and Animal Wellbeing, Universidade Santo Amaro - UNISA, São Paulo, Brazil
| | - Edilson R Matos
- Carlos Azevedo Research Laboratory, Federal Rural University of the Amazon (UFRA), Belém, PA, Brazil.
| | - Igor G Hamoy
- Laboratory of applied genetics, Federal Rural University of Amazonia (UFRA), Belém, PA, Brazil
| |
Collapse
|
2
|
Faustino F, Makino LC, Neumann E, Nakaghi LSO. Ultrastructure aspects of Brycon gouldingi (Teleostei, Characidae) related to swimming ability and feeding during larval development. JOURNAL OF FISH BIOLOGY 2018; 92:1560-1573. [PMID: 29633274 DOI: 10.1111/jfb.13612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 03/01/2018] [Indexed: 06/08/2023]
Abstract
The larval ultrastructure of Brycon gouldingi related to swimming and feeding from hatching to total yolk absorption is described from scanning electron micrographs. Newly hatched larvae (time zero) had no mouth opening, undefined optic vesicles, an olfactory plate visible as a shallow depression, rudimentary gill arches, neural groove, embryonic fin and a primary neuromast in the dorsal region of the head. At the time of yolk absorption, 55 h post hatching, the larvae presented an optic vesicle comprising an optic cup and crystalline lens; a mouth with tongue, tapered teeth and taste buds; a ciliated olfactory cavity; branched gill arches; filled neural groove signalling central nervous system development; caudal, pectoral, dorsal and anal fins; and neuromasts distributed throughout the head and body. These characters are related to prey capture and swimming ability, key aspects of survival during the larval stage. The results of this study provide important information for exploitation and aquaculture of B. gouldingi.
Collapse
Affiliation(s)
- F Faustino
- Centro de Aquicultura da Universidade Estadual Paulista (CAUNESP), Jaboticabal, São Paulo, Brazil
- Laboratório de Histologia e Embriologia do Departamento de Morfologia e Fisiologia Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista - UNESP, Jaboticabal, São Paulo, Brazil
| | - L C Makino
- Campus Experimental de Registro, Universidade Estadual Paulista - UNESP, Registro, São Paulo, Brazil
| | - E Neumann
- Piscicultura Buriti, Nova Mutum, Mato Grosso, Brazil
| | - L S O Nakaghi
- Centro de Aquicultura da Universidade Estadual Paulista (CAUNESP), Jaboticabal, São Paulo, Brazil
- Laboratório de Histologia e Embriologia do Departamento de Morfologia e Fisiologia Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista - UNESP, Jaboticabal, São Paulo, Brazil
| |
Collapse
|