Results 171 to 180 of about 4,961 (211)
Eugenol as an efficacious anaesthetic for tambaqui, Colossoma macropomum (Cuvier)
Aquaculture Research, 2005 Anaesthetics are important in fish culture to reduce handling stress and mortality. Eugenol is a promising anaesthetic because of its low cost, efficacy, safety margin for fish and lack of toxicity to humans. The goal of this study was to establish a protocol using eugenol as a fish anaesthetic for tambaqui Colossoma macropomum (Cuvier), and provide ...
Adalberto Val, R Roubach
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The physiology of the Tambaqui (Colossoma macropomum) at pH 8.0
Journal of Comparative Physiology B, 2017The Tambaqui is a model neotropical teleost which is of great economic and cultural importance in artisanal fisheries and commercial aquaculture. It thrives in ion-poor, often acidic Amazonian waters and exhibits excellent regulation of physiology down to water pH 4.0.
Chris M. Wood +4 more
openaire +3 more sources
Physiological and metabolic responses in juvenile Colossoma macropomum exposed to hypoxia
Fish Physiology and Biochemistry, 2020This study aimed to evaluate hematological, biochemical, and gasometric parameters of tambaqui juveniles (Colossoma macropomum) exposed to hypoxia and subsequent recovery. Six animals were subjected to normoxia (basal) treatment with dissolved oxygen (DO) 6.27 ± 0.42 mg L-1. Water flow and aeration were reduced for 3 days (hypoxia), during which DO was
Luanna do Carmo Neves +6 more
openaire +2 more sources
Hormonal induction and semen characteristics of tambaqui Colossoma macropomum
Zygote, 2011SummaryIn the hatchery-bred tambaqui Colossoma macropomum, spontaneous semen release does not occur, and hand-stripping produces reduced semen volume. The goal of this work is to evaluate the effects of hormonal induction with carp pituitary extract (CPE) on both qualitative (visual aspect, pH, motility, viability and morphological abnormalities) and ...
Alexandre Nizio, Maria +3 more
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Paraquat and temperature affect nonspecific immune response of Colossoma macropomum
Environmental Toxicology and Pharmacology, 2009This study evaluated the effect of paraquat (PQ) and temperature on hematological parameters and nonspecific immune system of fish Colossoma macropomum (Cachama). Juveniles were used for all experiments. Fish were exposed to three temperatures (18, 28, 35°C) and 10mg/L PQ during 21 days (PQ LC(50) 96h was of 48.05mg/L).
Raquel, Salazar-Lugo +5 more
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Use of cryotubes for the cryopreservation of tambaqui fish semen (Colossoma macropomum)
Cryobiology, 2015Tambaqui (Colossoma macropomum) is a freshwater fish of great importance to aquaculture in several South American countries. Recent studies have developed a protocol for semen cryopreservation in 0.25 and 0.5 mL straws; however, this technique has limitations for fingerling production at a large scale due to the high fecundity of tambaqui.
Alexandre Nizio, Maria +5 more
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Non-lethal molecular diagnostic for acanthocephalosis in Colossoma macropomum
Aquaculture, 2020Abstract The tambaqui C. macropomum is intensively produced in aquaculture and is subject to numerous parasitosis, such as acanthocephalosis, a parasitosis caused by Neoechinorhynchus buttnerae infection. The conventional diagnosis of acanthocephalosis is performed through fish euthanasia, which brings economic loss for fish farmers and poor ...
Cunha, Fernanda Pinheiro da +6 more
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2020
Currently, great importance has been given to the study of external morphology, especially in fish, when it is used as a means of identifying hybrids. This paper considers a multiple logistic regression model based on the truss protocol to compare morphological covariation patterns between specimens of C. macropomum and the hybrid C. macropomum (♀) x P.
Rivas, Danny Villegas +10 more
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Currently, great importance has been given to the study of external morphology, especially in fish, when it is used as a means of identifying hybrids. This paper considers a multiple logistic regression model based on the truss protocol to compare morphological covariation patterns between specimens of C. macropomum and the hybrid C. macropomum (♀) x P.
Rivas, Danny Villegas +10 more
openaire +1 more source
Isolation and characterization of a germ cell marker in teleost fish Colossoma macropomum
Gene, 2019The native Amazonian fish tambaqui (Colossoma macropomum) is the second-largest scaled fish in South America and the most common native species in Brazil. To preserve genetic resources with sufficient genetic diversity through germ cell cryopreservation and transplantation techniques, a molecular marker for identifying the cells is required to trace ...
Ana Carina Nogueira Vasconcelos +7 more
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Protein Requirement of Gamitana (Colossoma macropomum) in Fingerling Stage
International Journal of Life Science and Agriculture ResearchThe protein requirement for gamitana in the fry stage, was determined through the zootechnical parameters of liweweight gain and food conversion. There were used 128 gamitana fingerling of 3.19 g on average liweweight with increasing levels of protein (30%, 32%, 34% and 36%). Diets were isoenergetics (3.6 Mcal/kg DE), were fed for six weeks.
Mauricio Isabel +2 more
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