Results 141 to 150 of about 1,133 (175)
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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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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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Ovopel and carp pituitary extract for the reproductive induction of Colossoma macropomum males
Theriogenology, 2017The objective of this study was to evaluate Ovopel and carp pituitary extract (CPE) in the reproductive induction of Colossoma macropomum males. Nine treatments were tested in triplicate, totaling 27 experimental units. C. macropomum breeders were subjected to the following treatments: 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, and 0.7 Ovopel pellet/kg; 2.5 mg CPE ...
Edenilce de Fátima Ferreira, Martins +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
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The complete mitochondrial genome sequence of Colossoma macropomum (Characiformes: Serrasalmidae)
Mitochondrial DNA Part A, 2015Colossoma macropomum (Cuvier, 1816) is the largest characin of South America. This species and its congeners mainly feed on zooplankton, insects, snails and decaying plants. In this paper, we sequenced and annotated the complete mitogenome of C. macropomum. The total length is 16,703 bp, and it typically consist of 37 genes, including 13 protein-coding
Yu-Peng, Wu +3 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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Performance of the amazonian tambaqui, Colossoma macropomum, in pond polyculture
Aquacultural Engineering, 1993Abstract Tambaqui (48%) was reared in polyculture with grass carp (27%) and curimbata (25%) from 75 g mean weight for a period of 164 days. Ponds of 1200 m2 were stocked at a total density of 12720 ha−1. Fish were fed with an experimental diet made from soybean and maize at a daily rate calculated as 3% of the tambaqui biomass.
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Fish Physiology and Biochemistry
The effects of thermal shock on hematological, biochemical and antioxidant responses were evaluated in liver tissue of juvenile tambaqui (Colossoma macropomum) and tambatinga (♀ C. macropomum × ♂ Piaractus brachypomus). Forty juveniles of tambaqui and 40 juveniles of tambatinga, of the same age and with an initial weight of 23.3 ± 6.7 g, were randomly ...
Sidney, Dos Santos Silva +8 more
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The effects of thermal shock on hematological, biochemical and antioxidant responses were evaluated in liver tissue of juvenile tambaqui (Colossoma macropomum) and tambatinga (♀ C. macropomum × ♂ Piaractus brachypomus). Forty juveniles of tambaqui and 40 juveniles of tambatinga, of the same age and with an initial weight of 23.3 ± 6.7 g, were randomly ...
Sidney, Dos Santos Silva +8 more
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Tolerance to nitrogenous compounds for larval and juvenile Colossoma macropomum
Nitrogenous compounds are among the main toxic substances that are produced in aquaculture systems, and their tolerance limits vary between species and their stages of development. In this study, in six bioassays, the acute toxicity (LC50-96h) of total ammonia nitrogen (TAN = NH3-N + NH4+-N), non-ionized ammonia (NH3-N), nitrite (NO2--N) and nitrate ...Raphael Brito Dos Santos +7 more
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