Consulta: subjectFacets:"Teleostei"
Registros recuperados: 37
Data/hora: 10/06/2024 02:16:59

Diversity and stability of fishes (Teleostei) in a temporary river of the Brazilian semiarid region
Provedor de dados: 76
Autores: Medeiros,Elvio S.F.; Maltchik,Leonardo.
The effects of hydrological disturbances by flooding and drought on the diversity and stability in a temporary river fish community in the Brazilian semiarid region were analyzed over the 1996 hydrological cycle. Twelve collections of fishes were made during the wet and dry phases, and 789 individuals of 16 species were collected. Diversity was measured using Simpson's Index (S) and community stability was analyzed by the variation in abundance using Kendall's W concordance test. Fish diversity in the Taperoá river was subjected to hydrological disturbances by flooding and drought. During the wet phase the diversity was higher (S = 0.855) than during the dry phase (S = 0.771). The community was considered stable during the whole annual hydrological cycle...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Intermittent stream; Disturbance; Diversity; Stability.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212001000100016

Description mathématique de la croissance de Lesueurigobius friesii (Teleostei, Gobiidae). Essai de synthèse
Provedor de dados: 5
Autores: Gros, Philippe.
A population of the burrowing goby Lesueurigobius friesii was studied from 1974 to 1979, at a sampling station located on a Nephrops ground in the northem Bay of Biscay, off the south coast ofBrittany; samples were collected close to a muddy bottom, at depths ranging from 80 to 100 m. Data on demographie structures were obtained by two independent exercises: examination of oto1iths and the analysis of length-frequency distributions. The fish attains a standard length of at !east 71 mm and an age of 6 years. Most growth takes place during the first three years of !ife, and proceeds very slowly thereafter. The state of gonad development was assessed qualitatively by visual inspection of the body cavity of females; spawning occurs in spring, and by July 61 of...
Tipo: Text
Palavras-chave: Croissance; Modèle de Von Bertalanffy; Comparaison de courbes de croissance; Téléostéens; Golfe de Gascogne; Growth; Von Bertalanffy's model; Comparison of growth curves; Teleostei; Bay of Biscay.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00122/23302/21129.pdf

Hormone-induced spawning of cultured tropical finfishes.
Provedor de dados: 5
Autores: Marte, C.
Commercially important tropical freshwater and marine finfishes are commonly spawned with pituitary homogenate, human chorionic gonadotropin (HCG) and semi-purified fish gonadotropins. These preparations are often administered in two doses, a lower priming dose followed a few hours later by a higher resolving dose. Interval between the first and second injections may vary from 3-24 hours depending on the species. Variable doses are used even for the same species and may be due to variable potencies of the gonadotropin preparations.
Tipo: Text
Palavras-chave: Teleostei; Pisces; Tropical fish; Induced breeding; Sex hormones; Animal reproductive organs; Marine fish; Freshwater fish; Fish culture.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1436.pdf

Induction of ovulation and stimulation of spermation by LHRH or an LHRH analog associated or not with pimozide. Effects on some teleost fish.
Provedor de dados: 5
Autores: Billard, R; Weil, C; Barnabe, G.
Effectiveness of LHRH and one of its analogs (LHRH-A = D-Ala super(6) ethylamide) on induction of ovulation and stimulation of spermiation is reviewed here. LHRH was also combined with pimozide, an anti-dopaminergic agent, to try to cancel dopamine inhibition of gonatotropin (GtH) release. LHRH-A alone (50 mu g/kg) did not initiate ovulation but only oocyte maturation. When pimozide (10 mg/kg) and LHRH-A (50 mu g/kg) were combined, gonadotropic hormone secretion was significantly increased, causing ovulation and stimulating spermiation. This combination advanced ovulation in trout. Trout egg quality was markedly altered by the pimozide treatment; it remains to be tested in carp. In sea bass, LHRH-A was much more effective than LHRH, and ovulation was...
Tipo: Text
Palavras-chave: Salmonidae; Dicentrarchus labrax; Sparidae; Cyprinidae; Teleostei; Pisces; Inhibitors; Sex hormones; Sexual maturity; Spermatogenesis; Ovulation; Induced breeding; Sexual reproduction.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1218.pdf

Problems related to the lack of functional swimbladder in intensive rearing of the seabass Dicentrarchus labrax and the sea bream Sparus auratus .
Provedor de dados: 5
Autores: Chatain, Beatrice.
The primordial inflation of swimbladder normally occurs at a size of 4 to 5 mm in sea bream Sparus auratus and 5 to 6 mm in sea bass Dicentrarchus labrax . However, in intensive larval rearing conditions, lack of inflation is often observed and leads to the production of up to 80% of postlarvae whose swimbladder is not functional. They are, on the average, 20-30% smaller in weight than normal fry. Their survival rate can also be reduced by any kind of stress such as weaning, handling or hypoxic conditions. It is suggested that the selective mortality which affects the abnormal fish results both from a decrease in predatory efficiency and an increase in energetic needs.
Tipo: Text
Palavras-chave: Sparus aurata; Sparidae; Dicentrarchus labrax; Serranidae; Teleostei; Pisces; Genetic abnormalities; Hatching; Swim bladder; Growth; Larvae; Survival; Intensive culture.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1432.pdf

Homoplasies, Consistency Index and the Complexity of Morphological Evolution: Catfishes as a Case Study for General Discussions on Phylogeny and Macroevolution
Provedor de dados: 77
Autores: Diogo,Rui.
Catfishes constitute a highly diversified, cosmopolitan group that represents about one third of all freshwater fishes and is one of the most diverse Vertebrate taxa. The detailed study of the Siluriformes can, thus, provide useful data, and illustrative examples, for broader discussions on general phylogeny and macroevolution. In this short note I briefly expose how the study of this remarkably diverse group of fishes reveals an example of highly homoplasic, complex 'mosaic' morphological evolution
Tipo: Journal article
Palavras-chave: Catfishes; Homoplasies; Morphological macroevolution; Phylogeny; Siluriformes; Teleostei.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000400024

Origin, Evolution and Homologies of the Weberian Apparatus: A New Insight
Provedor de dados: 77
Autores: Diogo,Rui.
The Weberian apparatus is essentially a mechanical device improving audition, consisting of a double chain of ossicles joining the air bladder to the inner ear. Despite being one of the most notable complex systems of teleost fishes and the subject of several comparative, developmental and functional studies, there is still much controversy concerning the origin, evolution and homologies of the structures forming this apparatus. In this paper I provide a new insight on these topics, which takes into account the results of recent works on comparative anatomy, paleontology, and ontogeny as well as of a recent extensive phylogenetic analysis including not only numerous otophysan and non-otophysan extant otocephalans but also ostariophysan fossils such as...
Tipo: Journal article
Palavras-chave: Evolution; Functional anatomy; Ostariophysi; Otocephala; Otophysi; Phylogeny; Teleostei; Weberian apparatus.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200008

Teleostean Phylogeny Based on Osteological and Myological Characters
Provedor de dados: 77
Autores: Diogo,Rui; Doadrio,Ignacio; Vandewalle,Pierre.
Despite the progresses done in the field of teleostean phylogeny in the last decades, recent studies continué to raise questions concerning the higher-level relationships of this remarkably diverse group of fishes. The main aim of the present work is to help to clarify teleostean higher-level relationships. For that purpose, we undertook a cladistic analysis including 70 terminal taxa of 20 different orders and 271 morphological characters, concerning mainly osteological and myological structures of the cephalic region , pectoral girdle and fins and anterior vertebrae. In the consensus cladogram obtained, the elopomorphs appear as the most basal extant teleosts. The osteoglossomorphs included in the analysis are grouped in a monophyletic clade, which is...
Tipo: Journal article
Palavras-chave: Elopomorpha; Euteleostei; Myology; Otocephala; Osteoglossomorpha; Osteology; Phylogeny; Teleostei.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000300001

Cordelia's Dilemma, Historical Bias, and General Evolutionary Trends: Catfishes as a Case Study for General Discussions on Phylogeny and Macroevolution
Provedor de dados: 77
Autores: Diogo,Rui.
As noted Gould in his recent and last book «The structure of evolutionary theory», discourses on the high importance and frequency of evolutionary trends have consumed a great part of the research on the history of clades. Although aware that natural selection theoretically yields adaptation to immediate environments, many authors defend such trends as generalised improvements somehow conferring advantages across most or all experienced environments. The high importance given to evolutionary trends is questioned by Gould, who considers that such a high importance given to such evolutionary trends bears no necessary relationship to the relative frequency or casual weight of these events in evolution, but mainly to a major bias: trends tell histories, and...
Tipo: Journal article
Palavras-chave: Evolution; Morphology; Phylogeny; Siluriformes; Teleostei.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000500016

Ray-finned fishes (Osteichthyes, Actinopterygii) from the type Maastrichtian, the Netherlands and Belgium
Provedor de dados: 16
Autores: Friedman, M.
Ray-finned fishes are a diverse, but understudied, component of the Maastrichtian marine fauna of the southeast Netherlands (Limburg) and northeast Belgium (Liège-Limburg). The most extensive reviews of fishes from these uppermost Cretaceous deposits were made in the early and mid-Twentieth Century, but little research on this important assemblage has been executed since. The present paper provides figures and brief descriptions of fishes from the Maastrichtian type area as an aid for field identification of fossil discoveries. A simple key to common Maastrichtian fish teeth from this area is also included. All convincing records of ray-finned fishes from the Maastrichtian of the Netherlands and Belgium, inclusive of the Mons Basin, are teleosts, and...
Tipo: Article / Letter to the editor
Palavras-chave: Osteichthyes; Actinopterygii; Teleostei; Bony fish; Cretaceous; Maastrichtian; Type area; Europe; K/Pg extinction; 42.81.
Ano: 2012
URL: http://www.repository.naturalis.nl/record/428932

A new species of sand-dwelling catfish, with a phylogenetic diagnosis of Pygidianops Myers (Siluriformes: Trichomycteridae: Glanapteryginae)
Provedor de dados: 83
Autores: Pinna,Mário C. C. de; Kirovsky,Alexandre L.
A new species of sand-dwelling catfish genus Pygidianops, P. amphioxus, is described from the Negro and lower Amazon basins. The new species differs from its three congeners in the elongate eel-like body, the short barbels, and the small caudal fin, continuous with the body, among other traits of internal anatomy. The absence of anal fin further distinguishes P. amphioxus from all other Pygidianops species except P. magoi and the presence of eyes from all except P. cuao. The new Pygidianops seems to be the sister species to P. magoi, the two species sharing a unique mesethmoid with a dorsally-bent tip lacking cornua, and a produced articular process in the palatine for the articulation with the neurocranium. Pygidianops amphioxus is a permanent and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Freshwater; Psammophyly; Systematics; Teleostei.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000300004

A new miniature species of Odontocharacidium (Characiformes: Crenuchidae) from the Río Orinoco basin, Venezuela
Provedor de dados: 83
Autores: Rodrigues,Elizabeth Kathleen de Queiroz; Netto-Ferreira,Andre L.
ABSTRACT A new species of Odontocharacidium is described from the upper Río Orinoco basin, in Venezuela. The new species is distinguished from its only congener, Odontocharacidium aphanes, by the presence of: the antorbital, the parietal branch of the supraorbital laterosensory canal, the postcleithrum 1, the conspicuous bars extending ventrally below the middle portion of the body posteriorly, and two dark round blotches at the tip of the caudal peduncle. With the recognition of an additional species of Odontocharacidium the diagnostic characters of the genus and the variability in the number of maxillary teeth in specimens are discussed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Characidiinae; Miniaturization; Neotropics; Taxonomy; Teleostei.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200210

A new species of dwarf sea bass, genus Serranus (Serranidae: Actinopterygii), from the southwestern Atlantic Ocean
Provedor de dados: 83
Autores: Carvalho Filho,Alfredo; Ferreira,Carlos Eduardo Leite.
Serranus aliceae n. sp. is described from Rio de Janeiro and Espírito Santo States, southeastern Brazilian coast. The species is readily distinguished from its congeners by the following combination of characters: scales around the caudal peduncle 20 or 21; total gill rakers on first branchial arch 23-29; cheek-scales rows 5 or 6; and by the coloration of live specimens, which are reddish with a broad, conspicuous, white stripe from post-orbital region to the caudal-fin base and a white abdomen. The new species apparently inhabits the deeper (30 or more meters) portions of reef environments along the subtropical Brazilian coast, and is possibly associated with upwelling cold-water masses. The species was observed hovering above rocky bottoms, feeding on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Endemic species; Reef fish; Rocky reef; Subtropical; Teleostei.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000400809

A new species of Otothyropsis (Siluriformes: Loricariidae) from the rio Paraguay basin, Paraguay
Provedor de dados: 83
Autores: Calegari,Bárbara B.; Pablo Lehmann,A.; Reis,Roberto E.
Otothyropsis piribebuy, new species, is described from the río Piribebuy, a tributary to the río Paraguay basin, Cordillera, Paraguay. The new species is distinguished from O. marapoama mainly by having a continuous mid-dorsal series of 17-18 lateral plates, a robust levator crest in the hyomandibula, naked areas in the abdomen, an unpigmented circular blotch on the median portion of the lower lobe, and by several features related to sexual dimorphism. In addition, Otothyropsis is re-diagnosed and its phylogenetic relationships are discussed based on its present diversity.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cascudinho; Catfish; Neotropical; Systematics; Teleostei.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000200002

Dorsolateral head muscles of the catfish families Nematogenyidae and Trichomycteridae (Siluriformes: Loricarioidei): comparative anatomy and phylogenetic analysis
Provedor de dados: 83
Autores: Datovo,Aléssio; Bockmann,Flávio Alicino.
The skeletal muscles of the dorsolateral region of the head of the Nematogenyidae and representatives of the all major clades of the Trichomycteridae are described and illustrated. A hypothesis on the phylogenetic relationships among these taxa exclusively based on the surveyed musculature is presented. The single most parsimonious cladogram obtained from the phylogenetic analysis of the 36 myological characters gathered and 35 terminal-taxa mostly agrees with the previous hypotheses of trichomycterid intrarelationships. The Copionodontinae and Trichogeninae form a monophyletic lineage that is the sister-group to all remaining trichomycterids. The monophyly of the clades formed by Glanapteryginae plus Sarcoglanidinae; Stegophilinae plus Tridentinae plus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Myology; Ostariophysi; Teleostei.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000200001

Astyanax xavante, a new species of characid from middle rio Araguaia in the Cerrado region, Central Brazil (Characiformes: Characidae)
Provedor de dados: 83
Autores: Garutti,Valdener; Venere,Paulo Cesar.
Astyanax xavante is described from a creek of the middle rio Araguaia drainage located in the Cerrado region of the Brazilian Central Plateau. The new species is distinguished from congeners by the combination of pigmentation, morphometric, meristic, morphologic, and tooth features. Ecological notes for A. xavante are included.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neotropical fish; Tocantins-Araguaia basin; Teleostei; Piabas; Headwater fish.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000300004

A new species of Microlepidogaster (Siluriformes: Loricariidae: Hypoptopomatinae) from the upper rio Paraná basin, Brazil
Provedor de dados: 83
Autores: Calegari,Bárbara B.; Reis,Roberto E.
Microlepidogaster longicolla, new species, is described from the rio São João of the upper rio Paraná basin near Brasília, in central Brazil. The new species differs from M. perforatus, the only other species in this genus, by having a continuous lateral line, median lateral plate series reaching, rather than falling short of, the end of the caudal peduncle, a shorter pectoral-fin spine (13.4-16.2 vs. 18.2-21.0% standard length), a smaller interorbital distance (38.9-43.1 vs. 47.7-53.3% head length), and more numerous dentary teeth (16-29 vs. 12-15), in addition to several osteological features. Microlepidogaster longicolla shows a remarkable suite of secondary sexually dimorphic characters, involving the presence of a conical urogenital papilla in males,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Neotropical; Taxonomy; Catfish; Cascudinhos.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000300007

A new deep-sea species of Barathronus Goode &amp;amp; Bean from Brazil, with notes on Barathronus bicolor Goode &amp;amp; Bean (Ophidiiformes: Aphyonidae)
Provedor de dados: 83
Autores: Nielsen,Jørgen G.; Mincarone,Michael M.; Di Dario,Fabio.
A new species of Barathronus (Ophidiiformes: Aphyonidae) is described from a single, mature male specimen (101 mm SL) bottom trawled on the continental slope of Rio Grande do Norte, northeastern Brazil, between 1,964 and 2,045 m depth. The new species is diagnosed among congeners by the following combination of characters: peritoneum transparent, deep-set eyes not visible, eight fangs on vomer, anal fin rays 69, predorsal length 42.0% SL, preanal length 49.5% SL, penis long, slender, and lacking a pair of lobes at its base, and presence of a ventral flexure of the anterior 2-3 vertebrae. Additionally, morphological data of three specimens of Barathronus bicolor collected in Brazilian waters are presented and compared with those from 51 specimens from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Deep-sea diversity; Potiguar Basin; Western South Atlantic; Brazilian EEZ.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000100053

New species of Pyrrhulina (Teleostei: Characiformes: Lebiasinidae) from the eastern Amazon, Pará, Brazil
Provedor de dados: 83
Autores: Vieira,Lorena S.; Netto-Ferreira,André L.
ABSTRACT A new species of Pyrrhulina is described based on 60 specimens from tributaries of the rio Amazonas: rio Anapu, rio Capim, rio Guamá and rio Xingu, and coastal drainages in the state of Pará, Brazil. The new species differs from all congeners by having the primary stripe (the horizontal stripe of dark pigmentation extending posteriorly from the snout) terminating at the distal edge of the opercle. In all other species of Pyrrhulina, the primary stripe is either restricted to the snout or continues beyond the head (i.e. at least the anteriormost four scales of the lateral line series).
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Color pattern; Freshwater fish; Pyrrhulininae; Taxonomy; Teleostei.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000200215

New species of Curimatopsis from the río Caroni, Orinoco basin, Venezuela, with comments on C. macrolepis (Characiformes: Curimatidae)
Provedor de dados: 83
Autores: Melo,Bruno F.
ABSTRACT A new species of Curimatopsis is described from the highlands of the western Guiana Shield in the río Carapo and río Paragua, tributaries of the río Caroni in the Orinoco basin, southeastern Venezuela. The new species belongs to the Curimatopsis macrolepis clade due to its possession of a long lower jaw that projects past the anterior margin of the upper jaw, and separate first and second hypurals. The new species is diagnosed from remaining species of the Curimatopsis macrolepis clade by having a small-sized inconspicuous dark spot on the midlateral surface of the caudal peduncle, by details of body and fin pigmentation, and by additional morphometric characters. The distribution of C. macrolepis in the Amazon and Orinoco basins is updated based...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gran Sabana; Guiana Shield; Ostariophysi; Teleostei.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200209

Lagoonal sand smelts (atherina lagunaea, teleostei, atherinidae) inhabit marine shallow waters of the coasts of djerba island (tunisia)
Provedor de dados: 20
Autores: Bouriga, N.; Selmi, S.; Aurelle, D.; Barthelemy, R.; Quignard, J-P.; Trabelsi, M.
Atherina boyeri de la Méditerranée est un complexe hautement polymorphe ayant un génotype capable d’une réponse phénotypique flexible. Elle peut rapidement adapter les traits  de sa morphologie à des environnements allant des eaux douces aux eaux saumâtres côtières polyhalines et aux eaux océaniques. Les travaux de recherche réalisés, en Méditerranée, sur ce complexe ont permis de le scinder en trois espèces. Deux espèces marines (Atherina boyeri et Atherina punctata) et une espèce qui peuplent les lagunes et les côtes des îles Kerkennah (Atherina lagunae) (Trabelsi et al. 2009). Dans le présent travail l’analyse d’une portion du gène cytochrome b a  été utilisée  pour étudier les variations génétiques d’une population d’athérine, prélevée des côtes de...
Tipo: Journal Contribution
Palavras-chave: Genetic diversity Population genetics Subpopulations Phylogenetics Coastal lagoons Atherinidae; Atherina boyeri; Atherina; Teleostei.
Ano: 2009
URL: http://hdl.handle.net/1834/4458

Aspects of the biology and feeding ecology of the orbiculate cardinal fish &lt;i&gt;Sphaeramia orbicularis&lt;/i&gt; (Cuvier, 1828) (Teleostei: Apogonidae) in a Kenyan mangrove forest
Provedor de dados: 27
Autores: Mees, J.; Mwamsojo, G.U.; Wakwabi, E.O.
The orbiculate cardinal fish &lt;i&gt;Sphaeramia orbicularis&lt;/i&gt; is the most abundant teleost among the root system of the extensive mangrove forests bordering Gazi Bay, Kenya. The species was never recorded from the bay proper and it can thus be considered to be a true mangrove resident. The sampled population clearly consisted of two cohorts: the modes were approximately 65mm and 80 mm. Most individuals with standard lengths &gt;40mm had mature gonads ; the number of eggs ranged from 4,700 to 10,000. &lt;i&gt;S. orbicularis&lt;/i&gt; are carnivores, mainly feeding on small epi- and hyperbenthic crustaceans. Numerically, gammaridean amphipods and tanaids were the dominant prey categories in the stomachs of both size classes. Individuals belonging to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feeding behaviour; Apogonidae [Cardinalfishes]; Sphaeramia orbicularis [orbiculate cardinalfish]; Teleostei; Kenya.
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4024

Registros novos e adicionais de teleósteos marinhos na costa brasileira
Provedor de dados: 84
Autores: Caires,Rodrigo Antunes; Figueiredo,José Lima de; Bernardes,Roberto Ávila.
São apresentadas novas informações sobre a distribuição geográfica de algumas espécies de peixes teleósteos que ocorrem na costa brasileira, incluindo duas espécies que nunca haviam sido registradas em nossas águas. Os serranídeos Pseudogramma gregoryi (assinalado da Flórida à Venezuela) e Plectranthias garrupellus (registrado da Carolina do Norte ao Caribe) foram encontrados, respectivamente, na costa do Ceará e na costa sudeste-sul do Brasil. São aqui mencionados e discutidos os dois primeiros registros do gênero Caristius (Caristiidae) no Brasil, bem como os primeiros registros na costa sudeste-sul do Brasil das espécies Enchelycore carychroa (Muraenidae), e Chilomycterus antillarum (Diodontidae), e da espécie Neobythites brasiliensis(Bythitidae) no...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Distribuição geográfica; Taxonomia.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492008001900001

The ultrastructure of the mullet Mugil curema Valenciennes (Teleostei, Mugilidae) spermatozoa
Provedor de dados: 104
Autores: Eiras-Stofella,Daura Regina; Gremski,Waldemiro; Kuligowski,Sandra Maria.
The structure of the spermatozoon of Mugil curema Valenciennes, 1836 was studied using scanning and transmission electron microscopy. The spermatic head is rounded and formed by the nucleus containing granular chromatin, firmly packed resulting in a mass extremely electron dense. The acrossome is absent. The midpiece is characterized by the presence of two centrioles, a plasmatic canal, very few vesicles, and several mitochondria (9-10) with aproximately 0.50µm in diameter. The head and the midpiece are aproximately 1.56µm in diameter. The flagellum conforms to the 9 + 0 flagellar pattern near the transition region in its midpiece and is 9 + 2 from there on up to the distal region of the axoneme. The electron density in the A tubules 1, 2, 5 and 6 shows...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Mugilidae; Mullet; Mugil curema; Ultrastructure; Spermatozoa.
Ano: 1993
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751993000400007

Systematic revision of the South American species of Pinguipedidae (teleostei, trachinoidei)
Provedor de dados: 104
Autores: Rosa,lerecê L; Rosa,Ricardo S.
Five genera of marine fishes are recognized in the family Pinguipedidae: Pinguipes, Prolatilus, Pseudopercis, Paraperci and Kochichlhys, the first three being endemic to South America. The following South American pinguipedid species are considered valid: Pinguipes brasilianus, Pinguipes chilensis, Prolatilus jugularis, Pseudopercis numida, Pseudopercis semifasciata and Parapercis dockinski. Lecto-types are designated for Pinguipes brasilianus, Pinguipes chilensis and Prolatilus jugularis.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Pinguipedidae; South America; Revision.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000400009

Reprodução de Stellifer rastrifer (Jordan) (Teleostei, Sciaenidae) na Baía de Guaratuba, Paraná, Brasil
Provedor de dados: 104
Autores: Chaves,Paulo de Tarso da Cunha; Vendel,Ana Lúcia.
A total of 1312 individuais of S. rastrifer were sampled from March 1994 to September 1996 at the Guaratuba Bay, Southern Brazilian coast. This species is a permanently inhabitant of the mangrove area throughout the year. The weight/length relationship of the species in the region is "In TW =-12,35 + 3,22 In TL", and the individuais may reach 172mm of total length. The analyses of gonadal morphology and gonadossomatic index indicate that S. rastrifer is a multiple spawner species, that reproduces at the mangrove area during a long period of the year. The reproductive activity is more intense during the winter and mainly the spring, when the value of Condition Factor declines and empty folheies are found in the ovaries.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Sciaenidae; Stellifer rastrifer; Fish reproduction; Guaratuba Bay; Brazil.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000100008

Dynamics and cytochemistry of oogenesis in Astyanax fasciatus (Cuvier) (Teleostei, Characiformes, Characidae) from Rio Sapucaí, Minas Gerais State, Brazil
Provedor de dados: 104
Autores: Garcia,José Antônio Dias; Chini,Helena A.S.; Maistro,Edson Luis; Quagio-Grassiotto,Irani.
Oogenesis involves a set of transformations which are undergone by female germ cells These cells change into oogonias and then into mature oocytes. Sexually mature female fish were collected monthly, during one year, from the Sapucaí River, a tributary of the Rio Grande, which is part of the Furnas Reservoir in the state of Minas Gerais. During the several stages of maturation, we observed small round oogonias with a large nucleus, a single nucleolus, and weakly stained cytoplasm with eosinophilic granules. The primary oocytes showed a large basophilic nucleus, with a developed peripheral nucleolus and a reduced cytoplasm. The previtellogenic oocytes presented voluminous cytoplasm and nucleus with several small peripheral nucleoli. The oocytes underwent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Characidae; Astyanax fasciatus; Oogenesis; Cytochemical.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000400003

Sub-lethal concentrations of monocrotophos affect aggressive behavior of the fishes Astyanax altiparanae Garutti &amp;amp; Britski (Teleostei, Characidae) and Oreochromis niloticus (Linnaeus) (Teleostei, Cichlidae)
Provedor de dados: 104
Autores: Cruz,André Luis da.
This study investigated the effects of sublethal concentrations of the pesticide monocrotophos (organophosphate) on the agonistic behavior of two fishes species, Astyanax altiparanae Garutti &amp;amp; Britski, 2000 (lambari) and Oreochromis niloticus (Linnaeus, 1758) (Nile tilapia). Sublethal concentrations of the pesticide for the two species were determined and lambari was more resistant than Nile tilapia. The sublethal concentrations were smaller than 400 mgl-1 for lambari and 20 mgl-1 for Nile tilapia. The two species were tested in grouping conditions (triads) and isolation, under monocrotophos concentrations of 200 mgl-1 for lambari and 5 mgl-1 for Nile tilapia. The concentration decreased the aggressiveness in lambari, but in Nile tilapia an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Astyanax altiparanae; Oreochromis niloticus; Aggressive behavior; Organophosphate; Monocrotophos; Sub-lethal concentrations.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000400018

Dynamics and cytochemistry of oogenesis in Leporinus striatus Kner (Teleostei, Characiformes, Anostomidae) from the Rio Sapucaí, Minas Gerais State, Brazil
Provedor de dados: 104
Autores: Chini,Helena A.S.; Garcia,José Antônio Dias; Maistro,Edson Luis; Quagio-Grassiotto,Irani.
Oogenesis involves a sequense of transformations which are undergone by female germ cells. These cells change into oogonias and then into mature oocytes. Sexually mature females were collected monthly, during one year, from the Rio Sapucaí, tributary of the Rio Grande, which is part of the Furnas Reservoir system in the state of Minas Gerais. The observed material showed that oogonias were small spherical cells, had a big spherical nucleus, with a single nucleolus, and weakly stained cytoplasm with eosinophilic granules (FG stained), which indicate their protein content. The primary oocytes showed a big basophilic nucleus, with a large peripheral nucleolus, and several smaller nucleoli. They show a reduced cytoplasmic content. The previtellogenic oocytes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Anostomidae; Leporinus striatus; Oogenesis; Cytochemical.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000400004

Microscopic morphology and histochemistry of the digestive system of a tropical freshwater fish Trichomycterus brasiliensis (Lütken) (Siluroidei, Trichomycteridae)
Provedor de dados: 104
Autores: Oliveira Ribeiro,Ciro Alberto de; Fanta,Edith.
The digestive system of Trichomycterus brasiliensis (Lütken, 1874), a small sized tropical Teleostean fish widely distributed in South America, was studied. Tissue samples were prepared for light and scanning electron microscopy (SEM). Trichomycterus brasiliensis shows stratified esophagus epithelium with taste buds and goblet cells with neutral and acid mucus at the anterior region. The stomach is caecal, presenting a pyloric valve with neutral mucus cells. At the terminal portion it is surrounded by a thick muscular wall. The intestine shows two loops; the epithelium is single columnar, with acid and neutral mucus in goblet cells. Multicellular intestinal glands are absent. Granular cells are often seen in the mucosa, less in the submucosa but were not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Digestive tube; Histology.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000400007

Estrutura fina do espermatozóide de Acestrorhynchus falcatus Bloch (Teleostei, Characidae) da região norte do Brasil
Provedor de dados: 104
Autores: Matos,Edilson; Matos,Patricia; Corral,Laura; Azevedo,Carlos.
Spermatozoa of amazon fish, Acestrorhynchus falcatus Bloch, 1794 were investigated by optical microscopy (DIC) and electron microscopy (TEM). Spermatozoa have no acrosome, the head is ovoid, and the midpiece region cylindrical, contains spherical mitochondria. The centriolar complex is located at the lateral side of the nucleus, formed by nine peripheral pairs of microtubules and arranged in a right angle to each other. The flagellum consists of nine pairs of peripheral and two central microtubules.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Characidae; Acestrorhynchus falcatus; Ultrastructure; Spermatozoon.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000300019

Registro de Atherinella blackburni (Schultz) (Actinopterygii, Teleostei, Atherinopsidae) na praia de Ponta da Ilha, Ilha de Itaparica, Bahia, Brasil
Provedor de dados: 104
Autores: Lopes,Paulo Roberto Duarte; Oliveira-Silva,Jailza Tavares de.
Atherinella blackburni (Schultz, 1949) (Atherinopsidae), is known in the Atlantic Ocean in Costa Rica, south of Caribe and from Venezuela to central Brazil. The distribution and the intraespecific variation of characters of A. blackburni are poorly known. This study records A. blackburni in Bahia littoral and presents more informations about its intraespecific variation.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Actinopterygii; Teleostei; Atherinopsidae; Atherinella blackburni; Record; Bahia; Brazil.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000100012

Indicadores reprodutivos das espécies de Citharichthys Bleeker (Teleostei, Pleuronectiformes) na Baía de Guaratuba, Paraná, Brasil
Provedor de dados: 104
Autores: Chaves,Paulo de Tarso C; Vendel,Ana Lúcia.
The species of Citharichthys Bleeker, 1862, C. arenaceus Evermann &amp;amp; Marsh, 1900 and C. spilopterus Günther, 1862, are the most common flatfishes found in Guaratuba Bay, south Brazil. Different size categories of these flatfish occur in the mangrove area throughout the year. The Gonadosomatic Index, the Condition Factor, and the morphological analyses of the gonads from samples obtained between 1994 and 1996 reveals a spawning activity during late Spring and early Summer. This period coincides with the increase in temperature and decrease in salinity. Spawning evidence and the presence of ali size categories throughout the year indicate that Citharichthys spp. are permanent inhabitants of the mangrove in Guaratuba Bay, where they complete their life...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Pleuronectiformes; Fish reproduction; Guaratuba Bay; Brazil.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000100007

Ultraestrutura da espermatogênese do tamoatá, Hoplosternum littorale (Hancock) (Teleostei, Callichthyidae) do rio Amazonas
Provedor de dados: 104
Autores: Matos,E; Matos,P; Oliveira,E; Azevedo,C.
Sequential cytological modifications of Hoplosternum littorale (Hancock) spermatogenesis were studied with electron microscopy from the spermatocyte to the mature spermatozoon. Five stages of spermatical maturation were described. The spermatozoon is one of the primitive tupe, with head without acrosome and a tail with a type pattern.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Callichthyidae; Hoplosternum littorale.
Ano: 1993
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751993000200004

CAMBIOS EN DIVERSIDAD Y DISTRIBUCIÓN DE PECES NATIVOS POR LA PRESENCIA DE DOS ESPECIES INVASORAS EN EL RÍO ATACAMES, NOROCCIDENTE DEL ECUADOR
Provedor de dados: 37
Autores: JIMÉNEZ-PRADO,Pedro; VASQUEZ,Fernando.
RESUMEN La interpretación de la diversidad biológica puede resultar muy compleja, ya que existe una dinámica basada en el origen y en la diversificación de las especies, así como en los efectos antrópicos, tales como la introducción de especies invasoras, cuya consecuencia puede conducir a la extinción local de especies nativas. El objetivo de este trabajo fue analizar la variación temporal (2012 y 2017), tanto en composición como en distribución de la ictiofauna a lo largo del río Atacames, noroccidente del Ecuador. En 2012 se registró: 1) la presencia de Astyanax ruberrimus que se extinguió localmente para el 2017; y 2) la presencia de la tilapia (Orechromis niloticus) como única especie introducida a la que se sumó el guppy (Poecilia gillii) para el...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversidad; Ecología acuática; Neotrópico; Teleostei.
Ano: 2021
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2021000100081

Morphological study of the spermatogenesis in the teleost Piaractus mesopotamicus
Provedor de dados: 47
Autores: da Cruz-Landim,Carminda; Camargo Abdalla,Fábio; da Cruz-Höfling,Maria Alice.
The spermatogenesis of Piaractus mesopotamicus was investigated under light and transmission electron microscopy. The specimens were captured from their natural environment (Rio Miranda and Rio Aquidauana, Pantanal Matogrossense, Brazil) during April and September. The results were compared with the spermatogenic data of specimens under captivity condition. In both conditions, P. mesopotamicus presented the typical spermatogenesis pattern of the teleost fishes, showing no significative differences. The spermatozoon was classified as type I, which has a globular head without acrosome, a short middle piece and a long tail constituted only by the flagellum. This type of spermatozoon is considered the basic type in fishes.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Piaractus mesopotamicus; Spermatogenesis; Spermatogonia; Spermiogenesis; Teleostei.
Ano: 2003
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452003000300003

Diel changes in food and feeding activity of sciaenid fishes from the South-western Atlantic, Brazil
Provedor de dados: 57
Autores: SOARES,L. S. H.; VAZZOLER,A. E. A. de M.
Food habits and daily feeding activity of fish populations are important ecological variables for understanding their role in the ecosystem. Diel changes in feeding activity and dietary composition of juvenile whitemouth croaker Micropogonias furnieri, shortfin corvina Isopisthus parvipinnis, shorthead drum Larimus breviceps and of juvenile and adult banded croaker Paralonchurus brasiliensis were investigated from samples taken over a 24 hours period from 4 to 5 September 1987 on the continental shelf off South-eastern Brazil. Whitemouth croaker and banded croaker had a benthic diet based on polychaetes and some caridean shrimps and showed no diel feeding pattern. Shortfin corvina and shorthead drum fed on crustaceans and teleostean fish, the former...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diel feeding; Food habits; Teleostei; Sciaenidae; South-western Atlantic.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000200004