scholarly journals An outbreak of myxozoan parasites in farmed freshwater fish Colossoma macropomum (Cuvier, 1818) (Characidae, Serrasalminae) in the Amazon region, Brazil

2016 ◽  
Vol 3 ◽  
pp. 31-34 ◽  
Author(s):  
Marcela Videira ◽  
Michele Velasco ◽  
Cinthia Silva Malcher ◽  
Patrícia Santos ◽  
Patrícia Matos ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Amazon Region ◽  
Colossoma Macropomum

scholarly journals Cryopreservation of tambaqui semen using a dry shipper and a programmed freezing machine

2016 ◽  
Vol 37 (4) ◽  
pp. 2167 ◽  
Author(s):  
Mayara Setúbal Oliveira ◽  
Priscila Silva de Almeida-Monteiro ◽  
Larissa Teixeira Nunes ◽  
Francisco Renan Aragão Linhares ◽  
João Paulo Silva Pinheiro ◽  
...  
Keyword(s):  
Dimethyl Sulfoxide ◽  
Dilution Rate ◽  
Freshwater Fish ◽  
Sperm Morphology ◽  
Sperm Quality ◽  
Motile Sperm ◽  
Colossoma Macropomum ◽  
Freezing Method ◽  
In Captivity ◽  
Fresh Semen

Tambaqui (Colossoma macropomum) is a native freshwater fish that is of great importance for Brazilian aquaculture. Because of this importance, several techniques have been developed to improve the reproduction of this species in captivity. One of these techniques is the cryopreservation of sperm. In an effort to increase the efficiency of cryopreservation protocols, researchers have tried to determine suitable diluting solutions and freezing methods, which will provide a better post-thaw sperm quality. Thus, this study aimed to evaluate the efficiency of different diluents and freezing methods for the cryopreservation of tambaqui (C. macropomum) sperm. Samples of fresh semen were diluted in different treatments (Glucose 5% + 10% Dimethyl sulfoxide – DMSO, Glucose 5% + 10% Methyl glycol – MG, BTS + 10% DMSO and BTS + 10% MG) at a 1:9 dilution rate and frozen in a programmed freezing machine and a dry shipper. The semen samples were thawed and evaluated for vitality, sperm morphology and kinetics. Cryopreserved semen with DMSO and using the programmed freezing machine provided a greater percentage of motile sperm (15.44 ± 1.04%) after thawing compared to the dry shipper (3.99 ± 0.55%), regardless of the diluent. Additionally, DMSO showed better sperm velocities than MG regardless of the freezing method and the extender employed. A higher percentage of living spermatozoa was observed when glucose (37.28 ± 1.32%) (regardless of the freezing method and cryoprotectant) and DMSO (37.98 ± 1.25%) was used in the programmed freezing machine. For morphology, a greater amount of normal spermatozoa (46.10 ± 1.82%) was observed when the semen was cryopreserved using a freezing machine programmed with DMSO as the cryoprotectant and Glucose or BTS (38.16 ± 1.9% and 39.26 ± 1.87%, respectively) as extenders. Therefore, we suggest the use of the DMSO (10%) cryoprotectant in association with the Glucose (5%) extended in the programmed freezing machine for cryopreservation of C. macropomum semen.

Paraquat and temperature affect nonspecific immune response of neotropical freshwater fish Colossoma macropomum

2009 ◽  
Vol 189 ◽  
pp. S172-S173 ◽  
Author(s):  
Raquel Salazar-Lugo ◽  
America Estrella ◽  
Aridays Oliveros ◽  
Evelyn Rojas-Villarroel ◽  
Luz Villalobos ◽  
...  
Keyword(s):  
Immune Response ◽  
Freshwater Fish ◽  
Colossoma Macropomum ◽  
Nonspecific Immune Response

A new species of Loricaria (Siluriformes: Loricariidae) from the Turiaçu River basin, Eastern Amazon region, Brazil

Zootaxa ◽  
2021 ◽  
Vol 4915 (3) ◽  
pp. 424-434
Author(s):  
ANANDA CAROLINA S. SARAIVA ◽  
JOÃO MARCELO S. ABREU ◽  
FELIPE POLIVANOV OTTONI ◽  
NIVALDO MAGALHÃES PIORSKI
Keyword(s):  
New Species ◽  
Freshwater Fish ◽  
River Basin ◽  
Standard Length ◽  
Freshwater Fishes ◽  
Amazon Region ◽  
Fish Diversity ◽  
Pectoral Girdle ◽  
Median Region ◽  
A New Species

A new species of Loricaria is herein described from the Turiaçu River basin, Eastern Amazon region, Maranhão state, Brazil, within the Maranhão Hydrological Unit (MHU). Loricaria turi differs from its congeners mainly by the following combination of characters: abdominal plate development confined to the posterior median region, pectoral girdle mostly naked, with cluster of plates near pectoral fin bases; large eyes (minimum orbital diameter 16.2–20.7% of HL and maximum orbital diameter 19.8–24.0% of HL), 214.4 mm of maximum standard length, and large basicaudal plate (16.6–29.2% of HL). The description of this new species strengthens the hypothesis that the Maranhão Hydrological Unit (MHU) is a possible area of endemism for freshwater fishes and contributes to the knowledge of the freshwater fish diversity and composition of the region. 

scholarly journals Isolation of novel microsatellite markers for tambaqui (Colossoma macropomum, Cuvier 1818), an important freshwater fish of the Amazon

2011 ◽  
Vol 4 (1) ◽  
pp. 197-200 ◽  
Author(s):  
G. X. Santana ◽  
C. H. A. Santos ◽  
C. F. S. Sousa ◽  
P. R. M. Nascimento ◽  
M. N. Paula-Silva ◽  
...  
Keyword(s):  
Microsatellite Markers ◽  
Freshwater Fish ◽  
Colossoma Macropomum

scholarly journals Myxobolus sp. (Myxozoa) in the circulating blood of Colossoma macropomum (Osteichthyes, Characidae)

2011 ◽  
Vol 20 (1) ◽  
pp. 82-84 ◽  
Author(s):  
Patricia Oliveira Maciel ◽  
Elizabeth Gusmão Affonso ◽  
Cheila de Lima Boijink ◽  
Marcos Tavares-Dias ◽  
Luis Antonio Kioshi Aoki Inoue
Keyword(s):  
Fish Species ◽  
Amazon Region ◽  
Colossoma Macropomum ◽  
First Report ◽  
Saltwater Fish ◽  
Fish Blood ◽  
Blood Smears ◽  
Myxosporean Species

Myxosporea parasitize many organs in fresh and saltwater fish. Species of the genus Myxobolus parasitizing the gills and other organs of the tambaqui Colossoma macropomum have been described. In the present study, blood smears were made from juvenile tambaqui and were stained with May Grunwald-Giemsa-Wright in order to identify myxozoan parasites. Out of a total of 36 fish examined, one specimen (2.7%) that was reared in a cage presented spores that were identified as M. colossomatis, whereas fish kept in 250 L tanks showed prevalence of 5.5%. This is the first report of M. colossomatis in the blood of farmed tambaqui in the Amazon region. These results indicate that myxozoan parasites should also be investigated in fish blood smears. Some myxosporean species may cause diseases in fish, and these species need to be identified so that adequate preventive sanitary control can be instituted.

How will farmed populations of freshwater fish deal with the extreme climate scenario in 2100? Transcriptional responses of Colossoma macropomum from two Brazilian climate regions

2020 ◽  
Vol 89 ◽  
pp. 102487
Author(s):  
Luciana Mara Fé-Gonçalves ◽  
José Deney Alves Araújo ◽  
Carlos Henrique dos Anjos dos Santos ◽  
Adalberto Luis Val ◽  
Vera Maria Fonseca de Almeida-Val
Keyword(s):  
Freshwater Fish ◽  
Climate Scenario ◽  
Transcriptional Responses ◽  
Colossoma Macropomum ◽  
Extreme Climate

scholarly journals A fast and practical method for initial diagnosis of Piscinoodinium pillulare outbreaks: piscinootest

2018 ◽  
Vol 48 (7) ◽  
Author(s):  
Ana Lucia Silva Gomes ◽  
Jesaías Ismael da Costa ◽  
Maria Linda Flora de Novaes Benetton ◽  
Geraldo Bernardino ◽  
Andrea Belem-Costa
Keyword(s):  
Geographical Distribution ◽  
Practical Method ◽  
Amazon Region ◽  
Initial Diagnosis ◽  
Fish Farms ◽  
Colossoma Macropomum ◽  
Precision Equipment

ABSTRACT: The dinoflagellate Piscinoodinium pillulare is a parasite with low parasitic specificity and unspecific geographical distribution. This research reported a simple and practical method - the principle of spontaneous sedimentation - to identify the presence of P. pillulare during massive infestations which does not require using precision equipment. Agitation in water of the gill arches of infested fish will elicit, after a period of rest, recording the accumulation of trophonts in the bottom of flasks. The method was applied during outbreaks of P. pillulare in tambaqui, Colossoma macropomum and matrinxã, Brycon amazonicus, in fish farms of the Amazon region and proved to be effective.

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