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de Meneses YC, Justo MCN, Viana DC, Cohen SC. New and previously described species of Ameloblastella (Monogenoidea: Dactylogyridae) parasitizing Hypophthalmus marginatus and Pimelodina flavipinnis (Siluriformes: Pimelodidae) from the Tocantins River, Maranhão State, Brazil. Syst Parasitol 2023; 101:7. [PMID: 38114622 DOI: 10.1007/s11230-023-10125-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 11/01/2023] [Indexed: 12/21/2023]
Abstract
A new and two previously described species of Ameloblastella Kritsky, Mendoza-Franco & Scholz, 2000 were found in the gills of two pimelodid catfishes from the Tocantins River, Maranhão State, Brazil: Ameloblastella prima n. sp. from Pimelodina flavipinnis Steindachner, and A. edentensis Mendoza-Franco, Mendoza-Palmero & Scholz, 2016 and A. peruensis Mendoza-Franco, Mendoza-Palmero & Scholz, 2016 from Hypophthalmus marginatus Valenciennes. The new species differs from its congeners by having an accessory piece tubular, covered by a delicate membranous cap at 2/3 of the length, by the shape of the ventral and dorsal anchors, in which the ventral anchor is represented by a curved shaft in a position of 80° degrees, with delicate ornamentations located at the superficial and deep root areas, and the dorsal anchor with a long, well-developed and convex superficial root and short deep root, also presenting delicate ornamentations at the superficial and deep root areas. The present study provides new biogeographical data on the two previously described species of Ameloblastella and improves the knowledge on the species of Monogenoidea from the Neotropical Region, increasing to 14 the number of known species of Ameloblastella for this region.
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Affiliation(s)
- Yuri Costa de Meneses
- Laboratório de Helmintos Parasitos de Peixes - LHPP, Instituto Oswaldo Cruz, Fiocruz. Avenida Brasil, 4365, Manguinhos, Rio de Janeiro, RJ, 21040-360, Brazil
| | - Marcia Cristina Nascimento Justo
- Laboratório de Helmintos Parasitos de Peixes - LHPP, Instituto Oswaldo Cruz, Fiocruz. Avenida Brasil, 4365, Manguinhos, Rio de Janeiro, RJ, 21040-360, Brazil.
| | - Diego Carvalho Viana
- Núcleo de Estudos Morfofisiológicos Avançados - NEMO, Universidade Estadual da Região Tocantina do Maranhão, Campus Imperatriz, Rua Godofredo Viana, 1300, Imperatriz, MA, 65901-480, Brazil
| | - Simone Chinicz Cohen
- Laboratório de Helmintos Parasitos de Peixes - LHPP, Instituto Oswaldo Cruz, Fiocruz. Avenida Brasil, 4365, Manguinhos, Rio de Janeiro, RJ, 21040-360, Brazil
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de Oliveira Guilherme H, Perez Ribeiro PA, Prado VGL, Bahiense RN, Gamarano PG, de Oliveira CG, de Almeida Freitas D, Costa LS. Feeding behaviour, locomotion rhythms and blood biochemistry of the neotropical red-tail catfish (Phractocephalus hemioliopterus). JOURNAL OF FISH BIOLOGY 2023; 102:803-815. [PMID: 36648082 DOI: 10.1111/jfb.15317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
The study evaluated the feeding behaviour of Phractocephalus hemioliopterus through the animals' ability to adapt to the self-feeding system, their preferred feeding times and locomotor activity, as well as the blood biochemistry of juveniles fed in a light/dark cycle. The study was carried out through two experiments, the first of which contained two phases. In experiment 1 - phase I, 24 juveniles (35.28 ± 0.62 g) were distributed in eight 48 l tanks. The tanks were equipped with a self-feeding system and the experiment consisted of evaluating whether the animals were able to adapt to the self-feeding system, as well as evaluating the preferred feeding times and locomotor activity of these animals. A feeding challenge to the animals was introduced in phase II, based on the results of phase I. The results of the first phase evidenced a nocturnal feeding preference. Thus, the feeding challenge consisted of measuring whether the animal would feed during the day and how long it would take to adapt. When the animals consumed 100% of the amount of feed provided daily, phase II was ended. In experiment 2, 24 juveniles of P. hemioliopterus (182.00 ± 14.03 g) were distributed in eight 96 l tanks. This experiment consisted of two treatments with four repetitions, one with exclusive feeding during the middle of the light cycle and another with exclusive feeding in the middle of the dark cycle. At the end, blood samples were collected from the animals for blood biochemistry evaluations. In experiment 1 - phase I, the results showed that the fish adapted very well to the self-feeding system and had a strictly nocturnal feeding behaviour and locomotor rhythm. When they were submitted to the feeding challenge in phase II, the feed intake was stabilized from the 17th day onwards, proportionally to the nocturnal consumption observed in the first phase, thus demonstrating feeding plasticity. In experiment 2, the feeding times influenced the animals' biochemical parameters. Animals fed during the night had higher values of cholesterol and triglycerides than animals fed during the day. It is concluded that P. hemioliopterus has fast adaptability to a self-feeding system, with strictly nocturnal feeding and locomotor behaviours. However, it has feeding plasticity, adapting its behaviour according to food availability. Blood biochemical parameters are influenced by the light/dark feeding cycle.
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Affiliation(s)
- Helder de Oliveira Guilherme
- Departamento de Zootecnia, Universidade Federal de Minas Gerais, Escola de Veterinária, Laboratório de Aquacultura, Belo Horizonte, Minas Gerais, Brazil
| | - Paula Adriane Perez Ribeiro
- Departamento de Zootecnia, Universidade Federal de Minas Gerais, Escola de Veterinária, Laboratório de Aquacultura, Belo Horizonte, Minas Gerais, Brazil
| | - Verônica Guimarães Landa Prado
- Departamento de Zootecnia, Universidade Federal de Minas Gerais, Escola de Veterinária, Laboratório de Aquacultura, Belo Horizonte, Minas Gerais, Brazil
| | - Raphael Nogueira Bahiense
- Departamento de Zootecnia, Universidade Federal de Minas Gerais, Escola de Veterinária, Laboratório de Aquacultura, Belo Horizonte, Minas Gerais, Brazil
| | - Pedro Gomes Gamarano
- Departamento de Zootecnia, Universidade Federal de Minas Gerais, Escola de Veterinária, Laboratório de Aquacultura, Belo Horizonte, Minas Gerais, Brazil
| | - Camila Gomes de Oliveira
- Departamento de Zootecnia, Universidade Federal de Minas Gerais, Escola de Veterinária, Laboratório de Aquacultura, Belo Horizonte, Minas Gerais, Brazil
| | - Débora de Almeida Freitas
- Departamento de Zootecnia, Universidade Federal de Minas Gerais, Escola de Veterinária, Laboratório de Aquacultura, Belo Horizonte, Minas Gerais, Brazil
| | - Leandro Santos Costa
- Departamento de Zootecnia, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
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