Hemisorubim platyrhynchos: A More Manageable Shovelnose Catfish. Author: Seth Gibson. GIBS Photographer: Aaron Norman. Monster cats can reach several . Braz J Biol. Nov;64(4) Epub Mar 2. Age and growth of the porthole shovelnose catfish (Hemisorubim platyrhynchos) in the Pantanal. Hemisorubim platyrhynchos is a medium- to large-sized pimelodid catfish distributed along several river basins of the Neotropical Region.

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Material and methods Fifteen specimens of Hemisorubim platyrhynchs consisting of 8 males m and 5 females fcaught in the Parana River Corrientes State, Argentina and 2 specimens of undetermined sex from the Miranda River Mato Grosso do Sul State, Brazil were cytogenetically analyzed.

Additional details about fin-spine preparation, measurements, ring-reading conditions, and criteria used to identify double and false marks can be found in Penha and Penha et al. Archived from the original PDF on The Porthole Shovelnose Hemisorubjm, Hemisorubim platyrhynchosis the sixth largest pimelodidae of the Pantanal.

Publications, New Jersey, pp. The last procedure produced a life expectancy estimate longevity of Breeding and sexing information have not been reported.

Porthole shovelnose catfish

Wiley, New York, pp. Pimelodidaewith an uncommon large Y chromosome. The meat of this species is highly valued. However, even in such cases the growth rings were clearly visible. Neotropical Ichthyology hemjsorubim 1: Although no differences between sessions were detected through the Kruskal-Wallis test, Fig.


Age and growth of the porthole shovelnose catfish (Hemisorubim platyrhynchos) in the Pantanal

The m, sm, st were considered as biarmed chromosomes and acrocentrics were considered as uniarmed chromosomes. In other projects Wikimedia Commons. The genus Hemisorubim is a monospecific member of the Pimelodidae family. Among these, otoliths, vertebrae, and fin-spines are the structures that have produced the best results Fenerich et al. This fact suggests the presence of the Rosa-Lee phenomenon Lee,apud Ricker, The chromosomes were classified according to their arm ratios as metacentrics msubmetacentrics smsubtelocentrics stand acrocentrics a Levan et al.

The estimated growth parameters indicate that the species presents a relatively slow growth rate.

Hemisorubim platyrhynchos, Porthole shovelnose catfish : fisheries, aquarium

In this work, Hemisorubim platyrhynchos from three isolated populations were cytogenetically analyzed. Analyses of the relation between the number of rings, fin-spine size, and FL showed that the spine rings were indicators of the fish’s growth. Moreover, a positive relation was found between lengths of fin and finspine.

This page was last edited on 29 Marchat The accumulated amount of fish landed from to was platryhynchos tons Catella, The measurements of jurupoca specimens were recorded between July and October C-banding revealed a small amount of heterochromatin hemisorubbim chromosomes, including the NORs, and one biarmed pair that showed conspicuous positive bands on both arms.

Journal du Conseil Despite its wide distribution, average abundance, and importance in ecosystem functioning and regional fishery, hemizorubim is known about the biology of this species. This fact was also evidenced when using other banding techniques, such as RE Alu Iand indicates that this pair constitutes a species-specific cytogenetic marker.

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It feeds on benthic organisms and fish Froese and Pauly We report here on the age and growth of H. Mitotic chromosome preparations were obtained according to the technique described by Foresti et al. To circumvent the problem created by the reabsorption of the first growth ring Plaryrhynchos,an ANOVA was performed. Ichthyological Exploration Freshwaters 16 4: This chromosome pair could be considered a species-specific cytogenetic marker, as it has not been reported in other Pimelodidae Fig.

Progressive Fish-Culturist Support Center Support Center. Sampling procedure and data analysis.

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Metaphases of Hemisorubim platyrhynchos showing sequential Giemsa-C banding a, b and after Alu I treatment c. Journal List Comp Cytogenet v.

The mean size FL mean of the sampled individuals was Backcalculated lengths indicated the presence of the Rosa-Lee phenomenon in the analyzed sample. This article has been cited by other articles in PMC.