Comparative study of the male reproductive tract in seven families of South-American catfishes

Loir, Maurice; Cauty, Chantal; Planquette, P.; Bail, P.‐Y. Le

doi:10.1051/alr:1989005

Cited by 74 publications

(102 citation statements)

References 8 publications

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“…Some families of the order Siluriformes that present fringed testis show secretory activity at their caudal portions, sometimes having a seminal vesicle (LOIR et al 1989). The caudal fringes of the maturing testis of L. alexandri presented tubules internally coated by prismatic, secretory cells, with their lumen filled by secretion and spermatozoa.…”

Section: Discussionmentioning

confidence: 99%

Reproductive apparatus and gametogenesis of Lophiosilurus alexandri Steindachner (Pisces, Teleostei, Siluriformes)

et al. 2007

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The gonad morphology and gametogenesis of Lophiosilurus alexandri Steindachner, 1877 from Santo Antônio river (Minas Gerais, Brazil) were studied through anatomical and histological techniques. Examination of the testis revealed that they were paired, fringed organs with two distinct regions: cranial spermatogenic and caudal spermatogenic and secretory. The cranial region represents ca. 60% of the mature/maturing testis, containing 41 to 73 fringes, while the caudal portion represents ca. 40% and contains 44 to 68 fringes. At the cranial portion the length of the fringes was 3.70 ± 1.70 mm and in the caudal portion was 0.20 ± 0.10 mm. The spermatogenesis was cystic, synchronic, and occurred throughout the whole extension of the seminiferous tubules. The ovaries were saculiforms, paired organs, which present ovigerous lamellae containing cells of the oogenic lineage. The oocytes were classified into four developmental stages according to their cytological characteristics and the characteristics of the cell layers that surround them.

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Section: Discussionmentioning

confidence: 99%

Reproductive apparatus and gametogenesis of Lophiosilurus alexandri Steindachner (Pisces, Teleostei, Siluriformes)

et al. 2007

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“…In the caudal portion of the maturing / mature testes of L. lentiginosa, secretory tissue was observed, which produced an acidophilus secretion but did not form an individualized glandule. However, LOIR et al (1989) observed a non-defined seminal vesicle in the caudal region of the testes Hypostomus gymnorhynchus (Norman, 1926); Pseudoancistrus barbatus (Valenciennes, 1840) and Harttia surinamensis (Beseman, 1971) from the family Loricariidae.…”

Section: Discussionmentioning

confidence: 99%

“…In most fish species gonads are paired organs of similar size, which can be partially or totally fused (LE GAC & LOIR 1999). Some Siluriformes fishes from families Pimelodidae, Loricariidae and Callichthyidae present secretory activity in the caudal portion of the testes, sometimes forming a seminal vesicle (LOIR et al 1989).…”

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confidence: 99%

Gonadal structure and gametogenesis of Loricaria lentiginosa Isbrücker (Pisces, Teleostei, Siluriformes)

Guimarães-Cruz

Santos

2005

Rev. Bras. Zool.

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ABSTRACT. The gonadal structure and gametogenesis of Loricaria lentiginosa Isbrücker, 1979 were studied through anatomical and histological techniques. Forty two males and ten females in maturation/mature stage were captured in the reservoir of Porto Colombia, Paraná river basin, Minas Gerais, using gill nets, from November 2001 to October 2002 (tri-monthly captures). Examination of the testes revealed that they were paired, elongated and not fringed organs. Histologically, the testes presented three distinct regions: cranial espermatogenic; transistion espermatogenic and secretory; and caudal exclusively secretory. Standard histochemical techniques detected neutral glycoproteins from the secretion of the tubules of the caudal region. Espermatogenesis occurred in cysts throughout the whole extension of the wall of the seminiferous tubules, which anastomosis themselves and liberated the spermatozoa into the lumen of the espermatic ducts. The ovaries were paired, saculiformes and, histologically, they presented ovigerous lamellae that contained the cells of ovogenic ancestry. The oocytes were classified into four stages, based on their cytological characteristics and the cell layers that surrounded them. Post-ovulatory follicles and vitelogenic oocytes in the follicular atresia process also were observed.

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“…17a-c;Ihering, 1937;Britski, 1972;Loir, 1989;Royero, 1999: #120;Akama, 2004: #142). However, some auchenipterids, including Auchenipterichthys, Glanidium, Liosomadoras, Pseudauchenipterus, Pseudepapterus, Tetranematichthys, Tocantinsia, Trachelyichthys, Trachelyopterichthys, Trachelyopterus, and Trachycorystes, have the posterior testicular lobes modified into storage bags (Figs.…”

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confidence: 99%

Phylogenetic relationships of the South American Doradoidea (Ostariophysi: Siluriformes)

Birindelli¹

2014

Neotrop. ichthyol.

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A phylogenetic analysis based on 311 morphological characters is presented for most species of the Doradidae, all genera of the Auchenipteridae, and representatives of 16 other catfish families. The hypothesis that was derived from the six most parsimonious trees support the monophyly of the South American Doradoidea (Doradidae plus Auchenipteridae), as well as the monophyly of the clade Doradoidea plus the African Mochokidae. In addition, the clade with Sisoroidea plus Aspredinidae was considered sister to Doradoidea plus Mochokidae. Within the Auchenipteridae, the results support the monophyly of the Centromochlinae and Auchenipterinae. The latter is composed of Tocantinsia, and four monophyletic units, two small with Asterophysus and Liosomadoras, and Pseudotatia and Pseudauchenipterus, respectively, and two large ones with the remaining genera. Within the Doradidae, parsimony analysis recovered Wertheimeria as sister to Kalyptodoras, composing a clade sister to all remaining doradids, which include Franciscodoras and two monophyletic groups: Astrodoradinae (plus Acanthodoras and Agamyxis) and Doradinae (new arrangement). Wertheimerinae, new subfamily, is described for Kalyptodoras and Wertheimeria. Doradinae is corroborated as monophyletic and composed of four groups, one including Centrochir and Platydoras, the other with the large-size species of doradids (except Oxydoras), another with Orinocodoras, Rhinodoras, and Rhynchodoras, and another with Oxydoras plus all the fimbriate-barbel doradids. Based on the results, the species of Opsodoras are included in Hemidoras; and Tenellus, new genus, is described to include Nemadoras trimaculatus, N. leporhinus and Nemadoras ternetzi. Due to conflicting hypotheses of the phylogenetic position of Acanthodoras, Agamyxis, and Franciscodoras, these are considered as incertae sedis in Doradidae. All suprageneric taxa of the Doradoidea are diagnosed based on synapomorphic morphological characteristics.Uma análise filogenética com base em 311 caracteres morfológicos é apresentada para a maioria das espécies de Doradidae, todos os gêneros de Auchenipteridae e representantes de outras 16 famílias de Siluriformes. A hipótese de consenso entre as seis árvores mais parcimoniosas corrobora o monofiletismo do grupo Sul-americano Doradoidea (Doradidae mais Auchenipteridae), bem como o de Doradoidea mais a família Africana Mochokidae. O clado de Sisoroidea mais Aspredinidae é considerado como grupo-irmão de Doradoidea mais Mochokidae. Dentre os Auchenipteridae, os resultados corroboraram o monofiletismo de Centromochlinae e Auchenipterinae. Esta última inclui Tocantinsia e outros quarto grupos monofiléticos, um com Asterophysus e Liosomadoras, um com Pseudotatia e Pseudauchenipterus, e outros dois maiores com os demais gêneros da subfamília. Dentre os Doradidae, a análise de parcimônia recuperou Wertheimeria como grupo-irmão de Kalyptodoras, formando um clado irmão de todos os demais doradídeos, que incluem Franciscodoras e dois grupos: Astrodoradinae (mais Acanthodoras e Agamyxis...

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Comparative study of the male reproductive tract in seven families of South-American catfishes

Cited by 74 publications

References 8 publications

Reproductive apparatus and gametogenesis of Lophiosilurus alexandri Steindachner (Pisces, Teleostei, Siluriformes)

Reproductive apparatus and gametogenesis of Lophiosilurus alexandri Steindachner (Pisces, Teleostei, Siluriformes)

Gonadal structure and gametogenesis of Loricaria lentiginosa Isbrücker (Pisces, Teleostei, Siluriformes)

Phylogenetic relationships of the South American Doradoidea (Ostariophysi: Siluriformes)

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