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Registros recuperados: 71
Primeira ... 1234 ... Última
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A incubação de ovos e larvas em Genidens genidens (Valenciennes) (Siluriformes, Ariidae) da Baía de Guaratuba, Paraná, Brasil Zoologia
Chaves,Paulo de Tarso da C.
At Guaraluba bay, the catfish Genidens genidens shows incubating behavior during the summer months. The larvae are either less or heavier than the eggs, and their stomach analysis confirms the exogenous leeding during incubation. Embryos sizes can increase to 59mm in total lenght and 2,8g in total weight, including the yolksac. It was observed that the largest larvae are guarded by the largest adults, and that the embryo size is similar among individuals from the same adult.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Catfish; Reproduction; Fishes; Larvae; Paraná.
Ano: 1994 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751994000400008
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A new species of Aphanotorulus (Siluriformes: Loricariidae) from the rio Aripuanã basin, Brazil Neotropical Ichthyology
Oliveira,Andreza S.; Py-Daniel,Lúcia Rapp; Zawadzki,Cláudio H..
ABSTRACT The cis-Andean genus Aphanotorulus was recently revised and comprises six valid species: A. ammophilus, A. emarginatus, A. gomesi, A. horridus, A. phrixosoma and A. unicolor. Herein, a new species is described from tributaries of the rio Aripuanã basin, in Amazonas and Mato Grosso states, Brazil. The new species is easily distinguished from congeners by its color pattern: caudal fin with upper lobe mostly hyaline with dark spots along rays and membranes, and lower lobe red and without dark spots; and absence of dark spots in the lateral series of mid-ventral plates.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon basin; Fishes; Hypostominae; Taxonomy.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100208
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A new species of Curculionichthys (Siluriformes: Loricariidae) from the north edge of the Brazilian Shield, lower Amazon basin Neotropical Ichthyology
Gamarra,Suelen P.; Calegari,Bárbara B.; Reis,Roberto E..
ABSTRACT A new species of Curculionichthys is described from the rio Curuá-Una basin, in the northern edge of the Brazilian Shield, State of Pará, Brazil. The new species is diagnosed from congeners by possessing a single rostral plate, by having darkened tooth-crowns, and by a series of morphometric and meristic data. A close examination of the species of Curculionichthys revealed the presence of hyperthrophied odontodes on both dorsal and ventral margins of the snout tip, which are illustrated by electronic microscopy. A discussion is provided on possible phylogenetic relationships of the new taxon. The new species is provisionally accessed as Least Concern (not threatened).
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cascudinho; Fishes; Neotropical; Systematics; Taxonomy.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000200201
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Alteraciones de indicadores biológicos de Gambusia puncticulata (Poey, 1854) en sitios muy contaminados del río Almendares OceanDocs
Cabrera Páez, Y..
Se realizó una investigación con el objetivo de evaluar las alteraciones de los procesos biológicos en los peces que viven en sitios muy contaminados. Se aplicó una metodología basada en los efectos acumulativos de agentes estresantes múltiples a nivel de individuo en la especie Gambusia puncticulata (Poey, 1854). Este estudio se efectuó en tres sitios del río Almendares: El Rodeo, considerado como sitio de referencia, y dos sitios altamente contaminados, el Bosque de La Habana y el Puente 23. Se encontró un incremento en el largo y el peso de las hembras, y en el factor de condición para ambos sexos en los sitios más impactados. Este resultado se atribuye a la mayor disponibilidad de alimento debido a la eutrofización. El índice...
Tipo: Theses and Dissertations Palavras-chave: Fishes; Biological contamination; Eutrophication.
Ano: 2007 URL: http://hdl.handle.net/1834/5516
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Anoxia- and hypoxia-induced expression of LDH-A* in the Amazon Oscar, Astronotus crassipinis Genet. Mol. Biol.
Almeida-Val,Vera Maria Fonseca; Oliveira,Alice Reis; Silva,Maria de Nazaré Paula da; Ferreira-Nozawa,Monica Stropa; Araújo,Roziete Mendes; Val,Adalberto Luis; Nozawa,Sérgio Ricardo.
Adaptation or acclimation to hypoxia occurs via the modulation of physiologically relevant genes, such as erythropoietin, transferrin, vascular endothelial growth factor, phosphofructokinase and lactate dehydrogenase A. In the present study, we have cloned, sequenced and examined the modulation of the LDH-A gene after an Amazonian fish species, Astronotus crassipinis (the Oscar), was exposed to hypoxia and anoxia. In earlier studies, we have discovered that adults of this species are extremely tolerant to hypoxia and anoxia, while the juveniles are less tolerant. Exposure of juveniles to acute hypoxia and anoxia resulted in increased LDH-A gene expression in skeletal and cardiac muscles. When exposed to graded hypoxia juveniles show decreased LDH-A...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon; Fishes; Gene expression; RT-PCR; LDH-A; Hypoxia; Anoxia.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200025
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Biologia alimentar de Steindachnerina brevipinna (Characiformes, Curimatidae) do rio Ibicuí-mirim, Rio Grande do Sul, Brasil Iheringia, Sér. Zool.
Giora,Júlia; Fialho,Clarice B..
The feeding biology of Steindachnerina brevipinna (Eigenmann & Eigenmann, 1889) is described based on specimens collected in the Ibicuí-Mirim river, Rio Grande do Sul, Brazil, from April 2001 to March 2002. Diet description is based on the analysis of the frequency of occurrence and index of dietary importance of the ingested items. The monthly variation of stomach repletion, hepatosomatic and intestinal indexes was also analyzed. Major feeding activity occurred before (May, June and July 2001) the reproductive period, with the hepatosomatic index values showing similar variation along the year. Both the mean intestinal quotient and the analysis of the main ingested items (Bacillariophyta and Chlorophyta algae) indicate a detritivorous diet.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Detritivory; Feeding; Steindachnerina; Fishes.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212003000300007
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Can dams affect the trophic structure of ichthyofauna? A long-term effects in the Neotropical region Iheringia, Sér. Zool.
Lima,Felipe P. de; Nobile,André B.; Freitas-Souza,Diogo; Carvalho,Edmir D.; Vidotto-Magnoni,Ana P..
ABSTRACT Dams are considered an important source of modification upon the structure of aquatic communities and their reflexes are diverse on the fish fauna. Although there are several hydroelectric power plants in Brazil, the long-term effects on feeding activity of ichthyofauna are unknown. Thus, this study aimed to investigate the long-term effects of an old reservoir (fifty years) on the trophic dynamics of fish fauna. The diet of 20 fish species was analyzed, identifying 37 food items belonging to six trophic categories, which enable to create six trophic groups. The results found here suggests that throughout the creation of a reservoir, the trophic structure of the fish assemblages tend to reach trophic homeostasis, in which the fish community will...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding ecology; Old dam; Trophic stabilization; Resource availability; Fishes.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100230
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Chlordecone in the marine environment around the French West Indies: from measurement to pollution management decisions ArchiMer
Bertrand, Jacques; Bodiguel, Xavier; Abarnou, Alain; Reynal, Lionel; Bocquene, Gilles.
Chlordecone is a very persistent insecticide used in banana plantations of the French West Indies between 1972 and 1993. Chlordecone residues were found in inland water, in agricultural and freshwater products, and in marine organisms. This pollution has become of great concern in 2007. Therefore, a governmental action Plan was launched to better assess the pollution and to improve the consumer’s protection. Within this plan, 1048 samples from 69 different species of marine fishes and crustaceans were collected all around both the Guadeloupe and the Martinique Islands and analyzed. The results confirm the presence of chlordecone in marine organisms, with highly variable concentrations (from the detection limit to 1000 μg.kg-1). In 17.9 % of the samples,...
Tipo: Text Palavras-chave: Chlordecone (Kepone); French West Indies; Fishes; Crustaceans; Organochlorinated contaminant; Risk assessment; Pollution management.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00014/12511/9361.pdf
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Climate‐induced changes in the suitable habitat of cold‐water corals and commercially important deep‐sea fishes in the North Atlantic ArchiMer
Morato, Telmo; González‐irusta, José‐manuel; Dominguez‐carrió, Carlos; Wei, Chih‐lin; Davies, Andrew; Sweetman, Andrew K.; Taranto, Gerald H.; Beazley, Lindsay; García‐alegre, Ana; Grehan, Anthony; Laffargue, Pascal; Murillo, Francisco Javier; Sacau, Mar; Vaz, Sandrine; Kenchington, Ellen; Arnaud-haond, Sophie; Callery, Oisín; Chimienti, Giovanni; Cordes, Erik; Egilsdottir, Hronn; Freiwald, André; Gasbarro, Ryan; Gutiérrez‐zárate, Cristina; Gianni, Matthew; Gilkinson, Kent; Wareham Hayes, Vonda E.; Hebbeln, Dierk; Hedges, Kevin; Henry, Lea‐anne; Johnson, David; Koen‐alonso, Mariano; Lirette, Cam; Mastrototaro, Francesco; Menot, Lenaick; Molodtsova, Tina; Durán Muñoz, Pablo; Orejas, Covadonga; Pennino, Maria Grazia; Puerta, Patricia; Ragnarsson, Stefán Á.; Ramiro‐sánchez, Berta; Rice, Jake; Rivera, Jesús; Roberts, J. Murray; Ross, Steve W.; Rueda, José L.; Sampaio, Íris; Snelgrove, Paul; Stirling, David; Treble, Margaret A.; Urra, Javier; Vad, Johanne; Oevelen, Dick; Watling, Les; Walkusz, Wojciech; Wienberg, Claudia; Woillez, Mathieu; Levin, Lisa A.; Carreiro‐silva, Marina.
The deep sea plays a critical role in global climate regulation through uptake and storage of heat and carbon dioxide. However, this regulating service causes warming, acidification and deoxygenation of deep waters, leading to decreased food availability at the seafloor. These changes and their projections are likely to affect productivity, biodiversity and distributions of deep‐sea fauna, thereby compromising key ecosystem services. Understanding how climate change can lead to shifts in deep‐sea species distributions is critically important in developing management measures. We used environmental niche modelling along with the best available species occurrence data and environmental parameters to model habitat suitability for key cold‐water coral and...
Tipo: Text Palavras-chave: Climate change; Cold-water corals; Deep-sea; Fisheries; Fishes; Habitat suitability modelling; Octocorals; Scleractinians; Species distribution models; Vulnerable marine ecosystems.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00610/72211/71007.pdf
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Código de barras de ADN de las especies cubanas de peces dulceacuícolas. OceanDocs
Lara Lorenzo, A..
En el presente trabajo se realizó el análisis del código de barras ADN de 24 especies de la ictiofauna dulceacuícola cubana. Para ello, se secuenciaron 652pb del gen mitocondrial citocromo oxidasa I (COI) de 96 individuos provenientes de diferentes áreas geográficas y representativos, en la mayoría de los casos, de la distribución espacial de cada especie. En el análisis se utilizó la distancia genética Kimura 2 parámetros (K2P), considerando como cota superior el valor de 3%, para identificar los límites de divergencia entre especies. Complementariamente se llevó a cabo un análisis de agregación poblacional para identificar grupos poblacionales indicativos de linajes evolutivos independientes. El estimado promedio de divergencia genética entre...
Tipo: Theses and Dissertations Palavras-chave: CDNA; Genes; Fishes; Fish wastes.
Ano: 2008 URL: http://hdl.handle.net/1834/5514
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Consequências da monocultura de braquiárias e da invasão de cambarazais e algodoais sobre a ictiofauna de alagados no Pantanal. Infoteca-e
ROSA, F. R. da; RESENDE, E. K. de.
As áreas inundáveis do Pantanal são importantes ambientes de alimentação, crescimento e desova para a ictiofauna. A vegetação das áreas inundáveis passa por fortes mudanças, em parte causadas por oscilações naturais do nível hidrológico, em parte ocasionada pelo manejo humano da paisagem. São exemplos dessas mudanças, naturais ou antrópicas, a substituição de campos nativos pela expansão de algodoais (Ipomoea carnea), cambarazais (Vochysia divergens) e pela introdução das forrageiras Brachiaria spp. Avaliamos as consequências dessas substituições sobre a ictiofauna em áreas alagáveis do Pantanal Norte. Comparamos riqueza de espécies, biomassa e abundância das ictiocenoses coletadas em 30 parcelas com 25 m2. Registramos 101 espécies de peixes de variados...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Áreas inundáveis; Impactos ambientais; Peixes; Environmental impacts; Fishes; Flooded areas.
Ano: 2011 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/920837
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Contribution to the knowledge of the coastal marine fishes of São Tomé Island (Gulf of Guinea) OceanDocs
Porteiro, F.M.; Barreiros, J.P.; Afonso, P.; Santos, R.S.; Worms, J.; Wirtz, P..
Little is known about the ichthyofauna of the São Tomé and Príncipe archipelago. Since the early works of Osório, at the turn of the century, only few attempts were made to update and complete existing knowledge on fish systematics and biodiversity from this area. Over the past few years, however, several surveys made it possible to start an inventory of the coastal fishes for the archipelago. These are mainly based on specimens that where captured or observed whilst diving and also on fishes landed on beaches by local artisanal fishermen. A total of 124 species belonging to 108 genera and 61 families was identified. Some specimens, including Serranidae, Gobiidae and Labridae probably belong to undescribed species and are currently being studied.
Tipo: Journal Contribution Palavras-chave: Fishes; Gulf of Guinea; São Tomé e Principe; Checklist; Marine fish; Ichthyofauna.
Ano: 1999 URL: http://hdl.handle.net/1834/704
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Cytochemical aspects of the peripheral blood cells of Oreochromis (Tilapia) niloticus. (Linnaeus, 1758) (Cichlidae, Teleostei): part II Braz. J. Vet. Res. Anim. Sci.
UEDA,Ivete Kotomi; EGAMI,Mizue Imoto; SASSO,Wilson da Silva; MATUSHIMA,Eliana Reiko.
Morphologicaly, seven types of cells were identified in the blood of Oreochromis niloticus: erythrocytes, thrombocytes, neutrophils, eosinophils, basophils, lymphocytes and monocytes. Glycogen was present not only in the cytoplasm of neutrophils and thrombocytes but also in some lymphocytes and monocytes. The positive reaction for myeloperoxidase and Sudan black was observed in neutrophils and eosinophils. The bromphenol blue method was strongly positive for erythrocytes and eosinophils.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Blood cells; Cytochemistry; Oreochromis niloticus; Fishes.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962001000600005
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DESCRIPCIÓN DE LA MORFOLOGÍA DENTAL Y DEL HÁBITO ALIMENTARIO DEL BESOTE JOTURUS PICHARDI (MUGILIFORMES: MUGILIDAE) Boletín de Investigaciones
Correa Polo,Francisco; Eslava Eljaiek,Pedro; Martínez P.,Carlos; Narváez Barandica,Juan Carlos.
The dental morphology of J. pichardi and its relation to dietary habits is described for the first time. This mugilid inhabits the torrential rivers of short course in the Sierra Nevada de Santa Marta, that quickly lead into the Caribbean Sea. Joturus pichardi has heterodont dentition, with different forms that vary according to the tooth containing structure. The observed tooth structure is typical of omnivorous fishes, and consistent with the structure and composition of the diet analyzed. The latter was found dominated by mosses and aquatic macro invertebrates, mainly Chironomidae, a family of Diptera.
Tipo: Info:eu-repo/semantics/report Palavras-chave: Adaptation; Morphology; Mugilid; Fishes; Sierra Nevada de Santa Marta.
Ano: 2012 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612012000200011
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Desenvolvimento osteológico de Hippocampus reidi Ginsburg (Pisces, Syngnathiformes, Syngnathidae), em laboratório: I. Período embrionário Zoologia
Silveira,Rosana Beatriz.
The cartilaginous Structures of the cmbryos of Hippocampus reidi Ginsburg, 1933, were described as well as the beginning of the ossification process in the dentary, angular, retroarticular, operculum, frontal, supraoccipital bonés and neural end hemal arches. The viteline sac is well developed. The results show that cartilaginous structures are predominam in specimens with an average of 4.85 mm in total length.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hippocampus; Seahorse; Osteology; Fishes.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000200020
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Desove inducido en la anguila americana (anguilla rostrata). Efecto de las hormonas luteinizantes sintéticas (lhrh y lrh-a) en la maduración artificial. Parte I. OceanDocs
Reyes Canino, R.; Suárez Cuba, A.; Damas, T..
Se examina el efecto de las hormonas luteinizantes LHRH y LRH-A sobre la vitelogénesis y maduración artificial de hembras en estado de anguila amarilla. Con ambas hormonas se realizaron dos experiencias con dosis de 2 µg/kg p.c./semana durante 9 y 15 semanas. Como resultado de estas investigaciones se observó un mejor desarrollo de los ovocitos con la hormona LRH-A. Se discute acerca de la influencia de las características biológicas de los animales tratados en la maduración gonadal así como el empleo de mezclas hormonales gonadotrópicas en la obtención de mejores resultados.
Tipo: Journal Contribution Palavras-chave: Fishes; Eels; Http://aims.fao.org/aos/agrovoc/c_2490.
Ano: 2000 URL: http://hdl.handle.net/1834/4136
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Diet seasonality and food overlap of the fish assemblage in a pantanal pond Neotropical Ichthyology
Novakowski,Gisele Caroline; Hahn,Norma Segatti; Fugi,Rosemara.
We assessed the trophic structure of the fish fauna in Sinhá Mariana pond, Mato Grosso State, from March 2000 to February 2001. The aim was to determine the feeding patterns of the fish species during the rainy and dry seasons. The diets of 26 species (1,294 stomach contents) were determined by the volumetric method. Insects and fish were the most important food resources: insects were the dominant food of 23% and 27% of the species, respectively, in the rainy and dry season, and fish was the dominant item for 31% of the species in both seasons. Cluster analysis (Euclidean Distance) identified seven trophic guilds in the rainy season (detritivores, herbivores, insectivores, lepidophages, omnivores, piscivores and planktivores), and five trophic guilds in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fishes; Feeding overlap; Seasonal analysis; Pond.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400004
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Distribuição mensal dos peixes mais representativos da Lagoa Rodrigo de Freitas, Rio de Janeiro, Brasil Zoologia
Andreata,José V; Marca,Alex G; Soares,Cláudio L; Santos,Rubens da S.
From the results obtained in four years of monthly fish sampling and salinity and temperature verification of Lagoa Rodrigo de Freitas lagoon, an analysis of the monthly capture distribution of the nine most representative species, Brevoortia áurea (Spix, 1829), B. pectinata (Jenyns, 1842), Genidens genidens (Valenciennes, 1839), Geophagus brasiliensis (Quoy & Gaimard, 1824), Cerres aprion Cuvier, 1829, Jenynsia lineaía (Jenyns, 1842), Mugil liza (Valenciennes, 1836), Poecilia vivipara (Bloch & Schneider, 1801) and Xenomelani-ris brasiliensis (Quoy & Gaimard, 1824) was performed. The results show that Lagoa waters have an average salinity of 11.06% during the sampling period. Temperature showed its highest values from November to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fishes; Ecology; Rodrigo de Freitas Lagoon; Brazil.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000100013
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Effect of alcohol and formaldehyde on the δ13C and δ15N isotopic composition of Plagioscion squamosissimus and Hypophthalmus edentates (Pisces, Osteichthyes) - doi: 10.4025/actascibiolsci.v33i4.70 Biological Sciences
Manetta, Gislaine Iachstel; UEM; Benedito, Evanilde; UEM, Maringá; Ducatti, Carlos; UNESP.
The present study investigates the δ13C and δ15N isotopic composition in frozen samples (control), samples in alcohol and in formaldehyde of Plagioscion squamosissimus and Hypophthalmus edentates. From each individual we extracted a strip of muscle from the region above the lateral line, in the dorsal fin base, that was divided into three equal parts, each one was submitted to one type of treatment: freeze – control group (-15oC), conservation in alcohol 70% and fixation in formaldehyde 4%. Samples were kept under those treatments for 30 days, washed and submerged in distilled water for 4 hours. Afterwards, they were dried up in air oven at 60oC for 48 hours and macerated until the obtaining of a fine powder. A significant difference...
Tipo: Composição isotópica Palavras-chave: Stable isotope; Preservative; Fishes; Plagioscion squamosissimus; Hypophthalmus edentatus 2.05.00.00-9 Ecologia stable isotope; Preservative; Fishes; Plagioscion squamosissimus; Hypophthalmus edentatus.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7045
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Estrutura populacional de Pomadasys corvinaeformis (Steindachner) (Teleostei, Haemulidae) na Baía de Guaratuba, Paraná, Brasil Zoologia
Chaves,Paulo de Tarso da Cunha.
Reproductive and biometrical analyses were pertormed on 1629 individuals of P. corvinaeformis collected monthly from October 1993 to September 1996, at Guaratuba Bay, Southern Brazilian coast. The results indicate that the species is more abundant in the mangrove area during winter, when the largest individuais were collected, and spring, when the water temperature is lower and the salinity higher than summer or autumn. The relationship of body weight to body length, for grouped sexes, is "lnTW= -12,0456 + 3,1831 lnTL". The monthly Condition Factor is highest during summer and lowest during winter. It is suggested that P. corvinaeformis is present in the mangrove area during a specific etape of its life cycle and does not use this area to maturation and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pomadasys corvinaeformis; Fishes; Mangrove; Guaratuba Bay; Brazil.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000100018
Registros recuperados: 71
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