scholarly journals The role of branchial and orobranchial O2 chemoreceptors in the control of aquatic surface respiration in the neotropical fish tambaqui (Colossoma macropomum): progressive responses to prolonged hypoxia

2006 ◽  
Vol 209 (9) ◽  
pp. 1709-1715 ◽  
Author(s):  
L. H. Florindo
Keyword(s):  
Aquatic Surface Respiration ◽  
Neotropical Fish ◽  
Colossoma Macropomum

Branchial receptors and cardiorespiratory reflexes in a neotropical fish, the tambaqui (Colossoma macropomum)

2000 ◽  
Vol 203 (7) ◽  
pp. 1225-1239 ◽  
Author(s):  
L. Sundin ◽  
S.G. Reid ◽  
F.T. Rantin ◽  
W.K. Milsom
Keyword(s):  
Buccal Cavity ◽  
Cranial Nerves ◽  
Breathing Frequency ◽  
Aquatic Surface Respiration ◽  
Neotropical Fish ◽  
Cardiorespiratory Control ◽  
Colossoma Macropomum ◽  
Before And After ◽  
Water Ph ◽  
Ventral Aorta

This study examined the location and physiological roles of branchial chemoreceptors involved in the cardiorespiratory responses to hypoxia and hypercarbia in a neotropical fish that exhibits aquatic surface respiration, the tambaqui (Colossoma macropomum). Fish were exposed to abrupt progressive environmental hypoxia (18. 6–1.3 kPa water P(O2)) and hypercarbia (water equilibrated with 5 % CO(2) in air, which lowered the water pH from 7.0 to 5.0). They were also subjected to injections of NaCN into the ventral aorta (to stimulate receptors monitoring the blood) and buccal cavity (to stimulate receptors monitoring the respiratory water). All tests were performed before and after selective denervation of branchial branches of cranial nerves IX and X to the gill arches. The data suggest that the O(2) receptors eliciting reflex bradycardia and increases in breathing frequency are situated on all gill arches and sense changes in both the blood and respiratory water and that the O(2) receptors triggering the elevation in systemic vascular resistance, breathing amplitude, swelling of the inferior lip and that induce aquatic surface respiration during hypoxia are extrabranchial, although branchial receptors also contribute to the latter two responses. Hypercarbia also produced bradycardia and increases in breathing frequency, as well as hypertension, and, while the data suggest that there may be receptors uniquely sensitive to changes in CO(2)/pH involved in cardiorespiratory control, this is based on quantitative rather than qualitative differences in receptor responses. These data reveal yet another novel combination for the distribution of cardiorespiratory chemoreceptors in fish from which teleologically satisfying trends have yet to emerge.

Cardiorespiratory reflexes and aquatic surface respiration in the neotropical fish tambaqui ( Colossoma macropomum ): acute responses to hypercarbia

2004 ◽  
Vol 174 (4) ◽  
pp. 319-328 ◽  
Author(s):  
Luiz H. Florindo ◽  
Stephen G. Reid ◽  
Ana L. Kalinin ◽  
William K. Milsom ◽  
Francisco T. Rantin
Keyword(s):  
Aquatic Surface Respiration ◽  
Neotropical Fish ◽  
Colossoma Macropomum ◽  
Acute Responses ◽  
Cardiorespiratory Reflexes

Histopathological changes in gill, liver and kidney of neotropical fish Colossoma macropomum exposed to paraquat at different temperatures

2011 ◽  
Vol 31 (3) ◽  
pp. 490-495 ◽  
Author(s):  
Raquel Salazar-Lugo ◽  
Claunis Mata ◽  
Aridays Oliveros ◽  
Luz Marina Rojas ◽  
Mairin Lemus ◽  
...  
Keyword(s):  
Histopathological Changes ◽  
Neotropical Fish ◽  
Colossoma Macropomum ◽  
Different Temperatures ◽  
Liver And Kidney

SNPs markers for the heavily overfished tambaqui Colossoma macropomum, a Neotropical fish, using next-generation sequencing-based de novo genotyping

2016 ◽  
Vol 9 (1) ◽  
pp. 29-33 ◽  
Author(s):  
José Gregorio Martínez ◽  
Valéria Nogueira Machado ◽  
Susana J. Caballero-Gaitán ◽  
Maria da C. Freitas Santos ◽  
Rodrigo Maciel Alencar ◽  
...  
Keyword(s):  
Next Generation Sequencing ◽  
De Novo ◽  
Next Generation ◽  
Neotropical Fish ◽  
Colossoma Macropomum ◽  
Generation Sequencing

Effect of chronic cadmium exposure on structure of head kidney of neotropical fish Colossoma macropomum

2011 ◽  
Vol 205 ◽  
pp. S135
Author(s):  
R.D. Salazar-Lugo ◽  
A.B. Vargas ◽  
L.M. Rojas
Keyword(s):  
Head Kidney ◽  
Cadmium Exposure ◽  
Neotropical Fish ◽  
Colossoma Macropomum

scholarly journals The karyotypes and evolution of ZZ/ZW sex chromosomes in the genus Characidium (Characiformes, Crenuchidae)

2018 ◽  
Vol 12 (3) ◽  
pp. 421-438 ◽  
Author(s):  
Marcela Baer Pucci ◽  
Viviane Nogaroto ◽  
Luiz Antonio Carlos Bertollo ◽  
Orlando Moreira-Filho ◽  
Marcelo Ricardo Vicari
Keyword(s):  
Dna Sequences ◽  
Sex Chromosome ◽  
Chromosomal Rearrangements ◽  
Neotropical Region ◽  
Repeated Dna ◽  
Neotropical Fish ◽  
Karyotypic Formula ◽  
Fish Group ◽  
Sex Chromosome System

Available data on cytotaxonomy of the genus Characidium Reinhardt, 1867, which contains the greatest number of species in the Characidiinae (Crenuchidae), with 64 species widely distributed throughout the Neotropical region, were summarized and reviewed. Most Characidium species have uniform diploid chromosome number (2n) = 50 and karyotype with 32 metacentric (m) and 18 submetacentric (sm) chromosomes. The maintenance of the 2n and karyotypic formula in Characidium implies that their genomes did not experience large chromosomal rearrangements during species diversification. In contrast, the internal chromosomal organization shows a dynamic differentiation among their genomes. Available data indicated the role of repeated DNA sequences in the chromosomal constitution of the Characidium species, particularly, in sex chromosome differentiation. Karyotypes of the most Characidium species exhibit a heteromorphic ZZ/ZW sex chromosome system. The W chromosome is characterized by high rates of repetitive DNA accumulation, including satellite, microsatellite, and transposable elements (TEs), with a varied degree of diversification among species. In the current review, the main Characidium cytogenetic data are presented, highlighting the major features of its karyotype and sex chromosome evolution. Despite the conserved karyotypic macrostructure with prevalent 2n = 50 chromosomes in Characidium, herein we grouped the main cytogenetic information which led to chromosomal diversification in this Neotropical fish group.

Aquatic surface respiration, buoyancy control and the evolution of air-breathing in gobies (Gobiidae: Pisces)

1995 ◽  
Vol 198 (1) ◽  
pp. 79-89 ◽  
Author(s):  
J Gee ◽  
P Gee
Keyword(s):  
Water Surface ◽  
Buccal Cavity ◽  
Gas Bubble ◽  
Aquatic Surface Respiration ◽  
Air Breathing ◽  
Aerial Respiration ◽  
Bubble Volume ◽  
Cutaneous Respiration ◽  
Buoyancy Control

The role of a buccal gas bubble, held while performing aquatic surface respiration (ASR; ventilating the gills with surface water during hypoxia), was examined in benthic, intertidal Australian gobies (Favonigobius tamarensis, F. exquisitus, Pseudogobius olorum, Chlamydogobius sp., Mugilogobius paludis, Cryptocentroides cristatus and Arenigobius bifrenatus). Analyses of the forces of lift and weight of the head and body during ASR indicate a hydrostatic role for the bubble. During ASR, lift from the bubble was sufficient to provide neutral or positive buoyancy to the head, anchoring the mouth at the water surface. A buoyancy role was confirmed by experiments demonstrating the ability of some species to alter bubble volume, to compensate either for different body positions or for water densities (salinities). Use of the bubble for aerial respiration by Cryptocentroides, Mugilogobius, Chlamydogobius and Arenigobius was confirmed in hypoxia by the presence of blood-filled capillaries in the buccal subepithelium (mean air­blood barrier less than 30 µm) in areas of the buccal cavity that contacted the bubble. Blood-filled capillaries were rare or absent in normoxia in all species except Mugilogobius. Cutaneous respiration was inferred from the presence of blood-filled capillaries in the dermis and epidermis of emersed portions of the head in Mugilogobius, Chlamydogobius and Arenigobius. The buccal bubble has respiratory and hydrostatic roles and there is support for the hypothesis that ASR and the buoyancy regulation (air-gulping) required to perform it effectively are prerequisite steps in the evolution of air-breathing in these gobies.

scholarly journals Transferability of heterologous microsatellite primers in Brycon gouldingi

2018 ◽  
Vol 48 (11) ◽  
Author(s):  
Felipe Pinheiro de Souza ◽  
Ed Christian Suzuki de Lima ◽  
Natalia Gonçalves Leite ◽  
Angela Maria Urrea-Rojas ◽  
Andrei Lincoln Yamachita ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Null Alleles ◽  
Microsatellite Primers ◽  
Neotropical Fish ◽  
Genetic Studies ◽  
Prochilodus Lineatus ◽  
Colossoma Macropomum ◽  
Piaractus Mesopotamicus ◽  
Future Studies ◽  
Environmental Importance

ABSTRACT: Brycon gouldingi is a species of neotropical fish of socioeconomic and environmental importance in the Tocantins-Araguaia Basin. Genetic studies on this species are still limited, making it difficult to evaluate the population structure and genetic diversity in natural and captive stocks. Here, we aimed to evaluate the transferability of heterologous microsatellite primers in B. gouldingi. A total of 30 primers for eight species were evaluated: Brycon hilarii, Brycon opalinus, Brycon cephalus, Brycon orbignyanus, Prochilodus lineatus, Prochilodus argenteus, Piaractus mesopotamicus, and Colossoma macropomum. The primers that showed the best amplification patterns were applied to 20 specimens of B. gouldingi, and their genetic parameters were assessed. Among the 30 primers, seven showed satisfactory transferability, six of which belonged to the genus Brycon: Bh13 (B. hilarii), BoM5, BoM13 (B. opalinus), Borg9, Borg13, and Borg59 (B. orbignyanus), and one belonged to P. argenteus (Par80). The primers for the other species tested showed non-specificity or monomorphism; and were therefore, excluded from the analyses. The number of alleles ranged between two (Borg13 and Borg59) and three (Bh13, BoM5, BoM13, Borg9 and Par80), with sizes varying between 103 bp (BoM5) and 430 bp (Borg9). Four primers showed evidence of null alleles (BoM13, Borg9, Borg13, and Par80), which could probably be attributed to the respective Hardy-Weinberg deviation. Thus, seven primers were validated for cross-amplification in B. gouldingi, which may be used in future studies involving this species.

scholarly journals Quantitative genetic variation for resistance to the parasite Ichthyophthirius multifiliis in the Neotropical fish tambaqui (Colossoma macropomum)

2020 ◽  
Vol 17 ◽  
pp. 100338 ◽  
Author(s):  
Lieschen V.G. Lira ◽  
Raquel B. Ariede ◽  
Milena V. Freitas ◽  
Vito A. Mastrochirico-Filho ◽  
John F.G. Agudelo ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Ichthyophthirius Multifiliis ◽  
Neotropical Fish ◽  
Colossoma Macropomum ◽  
Quantitative Genetic

scholarly journals Triploidy in tambaqui Colossoma macropomum identified by chromosomes of fish larvae

2020 ◽  
Vol 9 (3) ◽  
pp. 65-69
Author(s):  
Diogo Hashimoto
Keyword(s):  
Fish Larvae ◽  
Alternative Methods ◽  
Mitotic Chromosomes ◽  
Neotropical Fish ◽  
Early Puberty ◽  
Colossoma Macropomum ◽  
Heat Shocks ◽  
Negative Impacts ◽  
Conservation Plans ◽  
Rates Of Growth

Triploid fish are excellent models for use in commercial scale because they can show higher rates of growth, carcass yield and meat quality. If sterile, tambaqui (Colosso mamacropomum) triploids can be used to avoid the problems related to early puberty, especially the negative impacts of male sexual maturation on harvest weight. In the present study, we evaluated the triploidy induction efficiency (thermal shocks) in the fish tambaqui Colossoma macropomum, the most important Neotropical species used for aquaculture. To verify the result of the triploidy experiments, we used a protocol of ploidy identification through analysis of mitotic chromosomes of early life stages (larvae cytogenetics). We obtained better results of hatching and triploid rates through temperature shock at 41°C for 2 min (heat shock) than cold shock. In conclusion, additional treatments will allow to refine the protocols to obtain 100% of triploidy in tambaqui, particularly those from heat shocks. These methodologies can also be applied to other Neotropical fish species, as alternative methods for breeding programs and to delineate conservation plans for the proper management of the stocks.

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