Patterns of reproduction and growth of the catfish Iheringichthys labrosus (Lütken, 1874) after a reservoir formation

2016 ◽  
Vol 32 (3) ◽  
pp. 456-463 ◽  
Author(s):  
H. Soares de Santana ◽  
A. Cantarute Rodrigues ◽  
C. Dei Tos
Keyword(s):  
Iheringichthys Labrosus

scholarly journals Interindividual size heteromorphism of NOR and chromosomal location of 5S rRNA genes in Iheringichthys labrosus

2007 ◽  
Vol 50 (1) ◽  
pp. 141-146 ◽  
Author(s):  
Rafael Augusto de Carvalho ◽  
Ana Lúcia Dias
Keyword(s):  
Chromosomal Location ◽  
5S Rdna ◽  
Rrna Genes ◽  
Telomeric Region ◽  
Fluorescent Staining ◽  
Homologous Chromosomes ◽  
Rdna Probe ◽  
5S Rrna Genes ◽  
Iheringichthys Labrosus

Twenty-five specimens of Iheringichthys labrosus from the Capivara Reservoir were analysed cytogenetically. AgNORs were detected in a pair of ST chromosomes, in the telomeric region of the long arm. Some individuals showed size heteromorphism of this region between homologous chromosomes. Treatment with CMA3 displayed GC-rich regions corresponding to the AgNOR pair, plus other fluorescent staining. In situ hybridization by fluorescence (FISH) with the 18S rDNA probe showed only one pair of stained chromosomes, confirming the heteromorphism observed with AgNO3 and CMA3 in some individuals. The 5S rDNA probe revealed telomeric staining on the long arm of a pair of chromosomes of the ST-A group, probably different from the NOR pair.

scholarly journals Reproduction of the catfish Iheringichthys labrosus (Lütken) (Pisces, Siluriformes) in Furnas reservoir, Minas Gerais, Brazil

2004 ◽  
Vol 21 (2) ◽  
pp. 193-200 ◽  
Author(s):  
José Enemir dos Santos ◽  
Nilo Bazzoli ◽  
Elizete Rizzo ◽  
Gilmar Bastos Santos
Keyword(s):  
Feeding Activity ◽  
Gonadosomatic Index ◽  
Secretory Activity ◽  
Minas Gerais ◽  
Reproductive Period ◽  
Mature Stage ◽  
Hepatosomatic Index ◽  
Gonadal Maturation ◽  
Caudal Region ◽  
Iheringichthys Labrosus

The reproductive biology of Iheringichthys labrosus (Lütken, 1874) was studied in Furnas reservoir, Minas Gerais, Brazil. The fishes, 323 males and 817 females, were captured bimonthly from August 1993 to July 1994 by using gill nets with 3-10 cm mesh size. Gonadal maturation of the specimens was analyzed through macro and microscopical characteristics of the gonads. The secretory activity of the tubules of the caudal region of the testis was analyzed during the maturational testicular cycle. Females and males were in reproductive activity throughout the year in the reservoir. The peak of advanced maturation/mature stages occurred from October to January and of spawned/spent from February to May. The spawning of I. labrosus was identified as fractional or multiple type: occurring in the reservoir or in tributaries around it. The oocyte development of the species was asynchronous as different clusters of oocytes occurred simultaneously in the ovarian parenchyma. The epithelium of the tubules of the caudal region of the testis was in high secretory activity during advanced maturation/mature stage and this activity was absence in resting. The gonadosomatic index followed gonadal maturation, and the hepatosomatic index of females was lowest in advanced maturation/mature probably due the contribution of the liver in the vitellogenesis. The variations of the stomach repletion index, coelomic fat and condition factor indicated that the feeding activity was reduced and that the energetic reserves were consumed during the reproductive period.

Long‐term study of the reproductive timing of the Neotropical catfish Iheringichthys labrosus (Lütken, 1874): Influence of temperature and river discharge

2020 ◽  
Vol 29 (2) ◽  
pp. 334-345 ◽  
Author(s):  
Nicolás Vidal ◽  
Franco Teixeira de Mello ◽  
Iván González‐Bergonzoni ◽  
Anahí López‐Rodríguez ◽  
Giancarlo Tesitore ◽  
...  
Keyword(s):  
River Discharge ◽  
Reproductive Timing ◽  
Term Study ◽  
Influence Of Temperature ◽  
Long Term Study ◽  
Iheringichthys Labrosus

scholarly journals Carbon sources and trophic position of the main species of fishes of Baía River, Paraná River floodplain, Brazil

2003 ◽  
Vol 63 (2) ◽  
pp. 283-290 ◽  
Author(s):  
G. I. Manetta ◽  
E. Benedito-Cecilio ◽  
M. Martinelli
Keyword(s):  
Trophic Position ◽  
Carbon Sources ◽  
Paraná River ◽  
C3 Plants ◽  
River Floodplain ◽  
Parana River ◽  
Main Species ◽  
Significant Difference ◽  
Iheringichthys Labrosus ◽  
Paraná River Floodplain

In order to verify the carbon source and trophic position of the main species of fishes, of the Paraná River floodplain, we analysed the proportion of stable carbon (delta13C) and nitrogen (delta15N) isotopes in muscle of fishes sampled in the rainy season. We analyzed adult individuals of Loricariichthys platymetopon, Schizodon borellii, Leporinus lacustris, Auchenipterus osteomystax, Iheringichthys labrosus, Leporinus friderici, and Serrasalmus marginatus. These data were compared with the results obtained by the analyzing stomach contents. The primary producers found in the Baía River were the C3 plants (riparian vegetation, macrophytes, periphyton, and phytoplankton) and the C4 plants (macrophytes). The results of the contribution analysis revealed that the carbon used by the species was derived from C3 plants. According to the trophic position estimates (diet and delta15N), the species primarily consumed Loricariichthys platymetopon, Schizodon borellii, Leporinus lacustris, and Leporinus friderici and, secondarily Auchenipterus osteomystax, Iheringichthys labrosus, and Serrasalmus marginatus. There was no significant difference between the two methods utilized.

scholarly journals Reproductive Dynamics of Iheringichthys labrosus (Lütken, 1874) (Teleostei, Pimelodidae), in the Capivara Reservoir, Paranapanema River, Parana, Brazil

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Fábio Mineo Suzuki ◽  
Diego Azevedo Zoccal Garcia ◽  
Mário Luís Orsi
Keyword(s):  
Gonadosomatic Index ◽  
Abiotic Factor ◽  
Mean Values ◽  
Gonadal Maturation ◽  
Maturation Stages ◽  
Males And Females ◽  
The Mean ◽  
Iheringichthys Labrosus ◽  
First Maturity ◽  
Size At First Maturity

To study the reproductive dynamics of the mandi-beiçudo, Iheringichthys labrosus, in the Capivara Reservoir, Paranapanema River, Parana, Brazil, specimens were captured trimonthly from March 2001 to July 2004 at four sampling sites. The sex ratio showed a predominance of females in most of months sampled and the larger length classes. The majority of the individuals captured showed a standard length between 16 and 22 cm, with a maximal length of 27.5 cm. The size at first maturity was estimated to be 18.1 and 19.7 cm for females and males, respectively. Analysis of the temporal variation of the gonadosomatic index (GSI) and frequency of occurrence of gonadal maturation stages of males and females for the months sampled showed that I. labrosus reproduces during the whole year, with peak reproduction in November and December. There was a positive correlation between the mean values of GSI and variation in rainfall values, suggesting that this abiotic factor can influence the reproduction of this species. The mean absolute fecundity was 67274.5  16562.5 oocytes, and the mean relative fecundity was 350.6  186.3 oocytes per gram of total weight.

scholarly journals Diet and resource sharing by two Pimelodidae species in a Southeastern Brazilian reservoir

2019 ◽  
Vol 19 (3) ◽  
Author(s):  
Zoraia Silva ◽  
Patrícia Elaine Cunha do Nascimento ◽  
Jean Ricardo Simões Vitule ◽  
Fabrício de Andrade Frehse ◽  
Mayara Silva Oliveira Ferraz ◽  
...  
Keyword(s):  
Resource Sharing ◽  
Abiotic Factors ◽  
Stomach Contents ◽  
Size Class ◽  
Interspecific Difference ◽  
Biotic And Abiotic Factors ◽  
Iheringichthys Labrosus ◽  
Food Overlap ◽  
Feeding Resources ◽  
Nmds Analysis

Abstract: Fish can vary their diet and feeding dynamics according to biotic and abiotic factors. There is insufficient knowledge regarding these factors in reservoirs, which limits the management of these areas. The aim of this study was to determine the diet of two related and most collected fish species, verify the influence of biotic and abiotic factors on their diet, and also verify the existence of resource sharing by them in an upstream Brazilian reservoir. Fish abundance in the reservoir was calculated and data were provided by 176 specimens of Iheringichthys labrosus (Lütken, 1874) and 255 specimens of Pimelodus maculatus Lacépède, 1803 collected in Camargos reservoir, MG, Brazil. Stomach contents were analysed through the frequency of occurrence and volumetric methods. PERMANOVA analysis was done to evaluate the influence of biotic (Species and Size class) and abiotic factors (Season and Site) on the diets. The Alimentary Index (AI) and feeding overlap Index (Pianka) were also estimated. A NMDS analysis was conducted to visualize the food categories responsible for interspecific difference. The ingested items were grouped into 18 categories, of which 17 were found in both species. Feeding resources were significantly related to the biotic (Species: Pseudo F = 2.583, P = 0.001; Size Class: Pseudo F = 1.646, P = 0.001) and abiotic (Season: Pseudo F = 2.458, P = 0.006) factors. I. labrosus showed an invertivorous diet while P. maculatus an omnivorous diet and both species were not exclusively benthophagus as typically reported. Food overlap occurred intraspecifically and interspecifically (Pianka 0.61 to 0.97 and 0.61 to 0.66, respectively) and overlap also occurred in three of the four analysed seasons (Pianka 0.66 to 0.91). The diet overlap found between two of the most fished species and the low fish productivity may indicate the limitation of resources in this reservoir and should be considered for management of this area.

scholarly journals Cytogenetics analyses among populations of the fish Iheringichtys labrosus (Kröyer, 1874) (Siluriformes, Pimelodidae). Karyotype analysis, C- banding and AgRONs distribution

2014 ◽  
Vol 74 (1) ◽  
pp. 212-216 ◽  
Author(s):  
S Sanchez ◽  
AC Swarça ◽  
AS Fenocchio
Keyword(s):  
Chromosome Pair ◽  
Diploid Number ◽  
Karyotype Analysis ◽  
Paraná River ◽  
Metacentric Chromosome ◽  
Parana River ◽  
C Banding ◽  
Different Populations ◽  
Technical Artifacts ◽  
Iheringichthys Labrosus

Karyotypic data on Iheringichthys labrosus from several populations of Paraná River/Argentina are presented. The diploid number was 2n=56 and the karyotype consisted of 42m/sm + 14st/a (NF= 98). The AgNORs were observed in telomeres of the long arm of a st/a chromosome pair. These sites were also positive after C-banding. Heterochromatin was observed in the telomeric position in some chromosomal pairs and can be found in one or both metacentric chromosome arms. The obtained results were compared with those reported for different populations from Brazilian rivers and the similarity among them was evident. However, discordant chromosome formulae and karyotype features between samples should be carefully taken because, in some cases, they seem to be more technical artifacts than real differences.

scholarly journals New host records and a checklist of fishes infected with Austrodiplostomum compactum (Digenea: Diplostomidae) in Brazil

2013 ◽  
Vol 22 (4) ◽  
pp. 511-518 ◽  
Author(s):  
Igor Paiva Ramos ◽  
Lidiane Franceschini ◽  
Aline Cristina Zago ◽  
Érica de Oliveira Penha Zica ◽  
Alison Carlos Wunderlich ◽  
...  
Keyword(s):  
Fish Species ◽  
Native Species ◽  
Host Fish ◽  
New Host ◽  
Paulo State ◽  
Second Intermediate Host ◽  
New Hosts ◽  
Iheringichthys Labrosus ◽  
New Host Records ◽  
Hoplosternum Littorale

This study reports the infection of fishes byAustrodiplostomum compactum metacercariae in the Chavantes reservoir, medium Paranapanema River, municipality of Ipaussu, São Paulo State, Brazil. Twenty-three fish species were analysed, and 13 were infected with A. compactum metacercariae (56.5%) in their eyes. The following six fish species are new hosts for this metacercaria:Crenicichla haroldoi (1/1), Eigenmannia trilineata (11/6), Hoplosternum littorale(11/1), Iheringichthys labrosus (17/2),Leporinus amblyrhynchus (11/1), and Piaractus mesopotamicus (3/1). These new species increase the number of Brazilian fish species infected with this parasite to 36. Based on these findings, we hypothesise that the metacercariae larval stage of the parasite has a low specificity for the second intermediate host (fish). The majority of fish species infected in Brazil belong to the Loricariidae and Cichlidae families. For the fish species with higher mean abundances in Brazil, six are non-native species, and currently, Plagioscion squamosissimus has the highest mean abundance. The majority of fish species infected with A. compactum in Brazil are concentrated in the Paraná basin, although this may be related to the distribution of researchers.

scholarly journals Cytogenetic analysis of the 18S, 5S rDNA and B chromosome of Iheringichthys labrosus (Lütken, 1874) (Siluriformes, Pimelodidae)

2010 ◽  
Vol 70 (3) ◽  
pp. 631-636 ◽  
Author(s):  
RA. Carvalho ◽  
A. Laudicina ◽  
L. Giuliano-Caetano ◽  
IC. Martins-Santos ◽  
AL. Dias
Keyword(s):  
Chromosome Pair ◽  
Base Composition ◽  
5S Rdna ◽  
B Chromosome ◽  
Positive Staining ◽  
Strong Fluorescence ◽  
Terminal Position ◽  
Cytogenetic Analyses ◽  
Iheringichthys Labrosus ◽  
Ribosomal Dnas

Cytogenetic analyses of the location of 18S and 5S ribosomal DNAs, and the base composition of B chromosomes of Iheringichthys labrosus from Tibagi River, Paraná, Brazil, are provided. AgNORs were observed in the terminal position on the long arm of a subtelocentric chromosome pair. CMA3-positive staining was observed in some chromosomes, which besides being associated with NORs, were all DAPI-negative. Chromosome B showed a strong fluorescence with CMA3. The concomitant use of 18S and 5S rDNA probes using the FISH technique revealed 18S ribosomal cistrons in a pair of subtelocentric chromosomes, on the long arm in the terminal position, coinciding with the AgNOR. The 5S sites were found in another subtelocentric pair, on the long arm in the interstitial region, near the centromere. The findings of the present study suggest that, although there are some more conserved cytogenetic characteristics, populations of I. labrosus may show their own characteristics.

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