Sperm and Spermatozeugma Ultrastructure in the Inseminating Catfish, Trachelyopterus lucenai (Ostariophysi: Siluriformes: Auchenipteridae)

Burns, John R.; Meisner, Amy Downing; Weitzman, Stanley H.; Malabarba, Luiz Roberto

doi:10.1643/0045-8511(2002)002[0173:sasuit]2.0.co;2

Cited by 36 publications

(33 citation statements)

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“…This characteristic was recorded for several species of auchenipterids based on observations of reproduction in captivity (Burgess & Azuma, Franke, 1990), on studies of sperm morphology (Ihering, 1937;Burns et al, 2002;Parreira et al, 2009), morphology of the male reproductive tract (Mazzoldi et al, 2007;Meisner et al, 2009), and the presence of spermatozoa in the ovarian lumen found in some species (Parreira et al, 2009). Furthermore, reproduction by insemination is herein inferred to be present in all species of Auchenipteridae due to the fact that they all have the anal fin modified in mature males for insemination.…”

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confidence: 80%

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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confidence: 80%

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

Birindelli¹

2014

Neotrop. ichthyol.

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“…Burgess (1989) identified that the actual fertilization takes place only at the time of the egg deposition, without any males assistance, by using a storage of sperm (Melo et al, 2011), which the females could retain for up to four months (varying upon the species). Hence, the more accurate term ''internal insemination'' had been used recently instead ''internal fertilization'' (Burns et al, 2002;Mazzoldi et al, 2007;Parreira et al, 2009). This insemination strategy may also allow the temporal gap between mating and spawning (Pusey & Stewart, 1989;Azevedo et al, 2000), as suggested for A. longimanus in this study (based on sex ratio; discussion below).…”

Section: Discussionmentioning

confidence: 99%

Seasonal changes in the gonadossomatic index, allometric condition factor and sex ratio of an auchenipterid catfish from eastern Amazonia

et al. 2011

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The aim of the present study was to evaluate the seasonal pattern of the gonadosomatic index (GSI), condition factor (K), and sex ratio in the catfish Auchenipterichthys longimanus (Siluriformes: Auchenipteridae) as an approach to identify its reproductive period. A total of 589 A. longimanus specimens (251 males and 338 females) were captured in the rivers of the Caxiuanã National Forest, in the Brazilian state of Pará, between July, 2008 and July, 2009. Among the male specimens, 171 were classified as adults and 80 as juveniles, while there were 249 adults and 89 juvenile females. Using a sinusoidal equation, analysis of the GSI revealed a reproductive asynchrony between the genders, with males attaining their highest GSI values in January, while females peaked in March. For males, the sinusoidal regression for GSI values was significant only when used the complete data set (P=0.001), wears no trend was identified for bimonthly means (P=0.136). For females, by contrast, significant values were obtained for both the complete data set (P=0.012) and bimonthly GSI means (P=0.026). For the condition factor, the sinusoidal equation returned significant seasonal variation in both raw data (P=0.02) and with mean values (P=0.00) for males, but only with raw data for females (P=0.04), which appears to reflect variation in the energy budget between genders. With regard to the sex ratio, more reproductive females were captured than males in January and March, 2009, which suggests a pattern of segregation related to the reproductive process. These parameters are fundamental to the assessment, protection, and management of natural fish stocks, as well as providing guidelines for the development of conservation strategies.O objetivo deste estudo foi avaliar alterações sazonais no índice gonadossomático (IGS%), fator de condição (K) e proporção sexual, a fim de determinar o período de atividade reprodutiva do bagre Auchenipterichthys longimanus (Siluriformes: Auchenipteridae), a partir da análise de exemplares coletados em igarapés da Floresta Nacional de Caxiuanã, estado do Pará, Brasil. Através de coletas bimestrais entre julho de 2008 e julho de 2009, foram capturados 589 exemplares de A. longimanus, sendo 251 machos e 338 fêmeas. Dentre os machos, 171 exemplares foram classificados como adultos e 80 foram jovens, e dentre as fêmeas, 249 eram adultas e 89 jovens. Por meio do estabelecimento de uma equação senoidal, a análise do IGS% evidenciou uma assincronia reprodutiva entre os sexos, pois os machos obtiveram maiores valores de IGS% em janeiro e as fêmeas apresentaram seu pico em março. Para os valores de IGS% de machos, a equação senoide mostrou-se significante somente para os valores brutos (P=0,001), sendo não identificada uma tendência com os valores médios do IGS% (P=0,136). Para as fêmeas, os valores de significância da equação senoide para o IGS% foram obtidos tanto para os dados brutos (P=0,012) quanto para os dados médios (P=0,026). Para o Fator de Condição, a equação senoide demonstrou variação nos valores brut...

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“…In all of the above inseminating species, the centrioles are located near the anterior tip of the cell, lateral to the elongate nucleus (Burns et al, 1998;Pecio et al, 2005). Elongate nuclei have been described in most inseminating characids studied to date (Pecio & Rafiń ski, 1994Burns et al, 1995Burns et al, , 1997Burns et al, , 1998Burns et al, , 2000Azevedo et al, 2000;, 2006Weitzman et al, 2005;Javonillo et al, 2007), as well in many other internally fertilizing teleosts (Jamieson, 1991). However, inseminating species that produce spermatozoa more similar to aquasperm include Planaltina spp.…”

Section: Fig 2 (Next Page) A-i Spermatozoa In Lumen Of Sperm Ductsmentioning

confidence: 99%

“…However, inseminating species that produce spermatozoa more similar to aquasperm include Planaltina spp. (Burns et al, 1995;Menezes et al, 2003), Kolpotocheirodon theloura (Burns et al, 1997;Malabarba & Weitzman, 2000), Attonitus ephimeros and A. irisae , Monotocheirodon pearsoni (Burns & Weitzman, 2006) and Knodus sp. among the Characidae and Ameca splendens, Aetonobius toweri, Characoden lateralis and Xenotoca eiseni among the Goodeidae (Jamieson, 1991).…”

Section: Fig 2 (Next Page) A-i Spermatozoa In Lumen Of Sperm Ductsmentioning

confidence: 99%

“…In males, adaptations for sperm transfer to the female have involved transformation of fins or other body regions into intromittent organs (Meisner, 2005;Burns & Weitzman, 2006), as well as modifications of both testis and sperm morphology (Burns et al, 1995(Burns et al, , 2000. Spermatozoa of inseminating species, referred to as "introsperm," often become relatively complex with elongate nuclei and midpiece regions (Jamieson, 1991).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of spermiogenesis in the externally fertilizing Hemigrammus erythrozonus and the inseminating Corynopoma riisei (Teleostei: Characiformes: Characidae)

2007

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Spermiogenesis and sperm ultrastructure were analyzed in two species of characids with different modes of fertilization: externally fertilizing Hemigrammus erythrozonus and inseminating Corynopoma riisei. Spermiogenesis in H. erythrozonus is characterized by lateral development of the flagellum, nuclear rotation, formation of a shallow nuclear fossa, condensation of the chromatin by elimination of the electron-lucent area from the peripheral region of the nucleus, and renewal of the nuclear membrane. Multilammelated membrane and multivesicular bodies were also observed during elimination of the excess cytoplasm. The spermatozoon exhibits characters typical of "aquasperm," i.e. a spherical head containing a spherical nucleus with highly condensed chromatin, several small mitochondria located at the base of the nucleus within a cytoplasmic collar that extends into a long cytoplasmic sleeve surrounding the anterior part of the single flagellum, which is contained within a cytoplasmic canal. The flagellum lacks fins. The proximal and distal centrioles are nearly parallel to one another, with the anterior tips of both located within shallow nuclear fossae. Spermiogenesis in C. riisei is characterized by nuclear elongation alongside the forming flagellum, formation of an elongate cytoplasmic canal, displacement and elongation of the mitochondria, and uniform condensation of chromatin throughout the nucleus through enlargement of the diameter of the chromatin granules. The spermatozoon has an elongate nucleus with two elongate mitochondria localized to one side. Mitochondria are also located posterior to the nucleus forming a mitochondrial region. The single flagellum, which lacks fins, is lateral to the nucleus and initially contained within the greatly elongate cytoplasmic canal before exiting the canal at its posterior terminus. The spermatozoon of C. riisei exhibits several characters typical of "introsperm," such as an elongate nucleus and midpiece (mitochondrial region). The nuclear chromatin in the spermatozoon remains "flocculent" and is never as condensed as that seen in many characid sperm. Differences in spermiogenesis between externally fertilizing and inseminating characids are discussed.Foram analisadas a espermiogênese e ultraestrutura dos espermatozóides de dois caracídeos com modos de fertilização distintos: fertilização externa em Hemigrammus erythrozonus e inseminação em Corynopoma riisei. A espermiogênese em H. erythrozonus é caracterizada pelo desenvolvimento lateral do flagelo, rotação nuclear, formação de uma fossa nuclear rasa, condensação de cromatina por eliminação da área elétron-lúcida na região periférica do núcleo e renovação da membrana nuclear. Membrana multilamelada e corpos multivesiculares foram observados durante a eliminação do excesso de citoplasma. O espermatozóide exibe os caracteres típicos do "aquaespermatozóide," com uma cabeça esférica que contem um núcleo esférico com cromatina muito condensada, várias mitocôndrias pequenas localizadas na base do núcleo e dentro de um colar ...

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Sperm and Spermatozeugma Ultrastructure in the Inseminating Catfish, Trachelyopterus lucenai (Ostariophysi: Siluriformes: Auchenipteridae)

Cited by 36 publications

References 14 publications

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

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

Seasonal changes in the gonadossomatic index, allometric condition factor and sex ratio of an auchenipterid catfish from eastern Amazonia

Comparison of spermiogenesis in the externally fertilizing Hemigrammus erythrozonus and the inseminating Corynopoma riisei (Teleostei: Characiformes: Characidae)

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