Consulta: creatorFacets:"Verani,José Roberto"
Registros recuperados: 14
Data/hora: 13/06/2024 02:34:15

Aspectos bioecológicos do camarão-rosa Penaeus Brasiliensis latreille (natantia, penaeidae) da Lagoa da Conceiçao, Florianópolis, Santa Catarina, Brasil
Provedor de dados: 104
Autores: Branco,Joaquim Olinto; Verani,José Roberto.
In the time period between May/92 to Abril/93, 602 (267 males and 335 females) specimens oi P. brasiliensis Latreille, 1817 were collected. The shrimps were captured by night using a hand net in áreas between 30 to 150 cm deep. The amplitude of length ranged from 1,3 to 13,7 cm, the highest frequencies of capture were registered during the Fali between the classes of 7,0 and 10,0 cm. The males present isometric growth and the females negative allometric one. The size of the pre-adult ranged from 8,8 cm for the females and 9,2 cm for the males. The recruiting occurs chiefly in the Summer with intense growth during the Fall-Winter period, reaching a climax with the migration of pre-adults to the ocean in midwinter.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Penaeus brasiliensis; Bioecology; Migration; Conceição Lake.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000200007

Reproductive aspects of Cyphocharax voga (Hensel) from Custódias Lagoon, Rio Grande do Sul, Brazil (Characiformes, Curimatidae)
Provedor de dados: 104
Autores: Schifino,Lúcia Cabral; Fialho,Clarice Bernhardt; Verani,José Roberto.
The aim of this study was to analyse the reproductive period, fecundity and the size of the first gonadal maturation of Cyphocharax voga (Hensel, 1869) of Custódias Lagoon, state of Rio Grande do Sul, Brazil. The specimens (293 males and 247 females) were collected monthly, during the period between October 1994 and September 1995. The reproductive period took place from early winter until the end of spring. The average absolute fecundity was 36608 oocytes. The size of the first gonadal maturation was estimated in 121 and 128 mm for males and females respectively.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Curimatidae; Cyphocharax voga; Fecundity; Reproduction.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000300019

Reproductive traits of the yellow-mandi catfish Pimelodus maculatus Lacépède (Osteichthyes, Siluriformes) in captive breeding
Provedor de dados: 104
Autores: Sato,Yoshimi; Fenerich-Verani,Nelsy; Verani,José Roberto; Godinho,Hugo Pereira; Sampaio,Edson Vieira.
Pimelodus maculatus Lacepede, 1803 is an important fish of the Säo Francisco river basin, where it is economically significant in both professional and sports fisheries. The fish, maintained in captivity, was subjected to hypophysation with crude caip pituitary extract. Approximately 70% of the females treated spawned viable eggs. The eggs were opaque, demersal, yellow and free. Egg stripping was performed at 213 hour-degrees (duration = 8.3 h) after the second dose injection, at water temperature of 25-26ºC. Hatching occurred at 394 hour-degrees (duration = 16.3 h) after egg fertilization, at water temperature of 24-25ºC. Egg fertilization rate was 64.8%. The relationship between absolute fecundity (AF), initial fertility (IF) and final fertility (FF) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Siluriformes; Pimelodus maculatus; Yellow-mandi catfish; Reproduction.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000400006

Influência de fatores abióticos na eclosão de ovos dormentes do rotífero Brachionus calyciflorus Pallas (Monogononta, Ploima)
Provedor de dados: 104
Autores: Rojas,Nilton Eduardo Torres; Verani,José Roberto; Basile-Martins,Maria Amália.
The factors involved in the induction of resting eggs development and hatching are poorly understood for Brachionus calyciflorus populations of South Hemisphere. The role of some abiotic factors in controlling the hatching rates of B. calyciflorus resting eggs was investigated. Determination of optimum hatching conditions would be important in developing the use of this species as food for fish larvae in aquaculture. Resting eggs were exposed to different treatments in the laboratory, and monitored for hatching over a period of five days. Optimum hatching conditions were: pH 5-9, water ionic concentrations from 220 to 880 mg.l-1 of selected salts, temperature 25 - 30ºC, photoperiod eight or more hours light per day, and light intensity equal to or greater...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachionus calyciflorus; Rotifer; Resting eggs; Hatching eggs; Abiotic factors.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000600004

Estudo populacional do camarão-rosa Penaeus Paulensis pérez farfante (natantia, penaeidae) na Lagoa da Conceiçáo, Santa Catarina, Brasil
Provedor de dados: 104
Autores: Branco,Joaquim Olinto; Verani,José Roberto.
In the time period between May/92 to April/93, 2693 (1243 males and 1450 females) specimens of Penaeus paulensis Pérez Farfante, 1967 were collected. The shrimps were captured by night using a hand net in äreas between 30 to 150 cm deep. The abundance of P. paulensis is regulated mainly by the temperature, the summer being the season of greater profusion. The major recruiting period takes place in the Spring with shrimps measuring between 1,0 to 3,0 cm and approximately 2,0 months old. The population reaches the pre-adult in the Fall-Winter period with average length between 8,8 cm (females) and 9,3 cm (males). The migration to the ocean occurs during the Winter. The artisanal fishing in the Conceição Lake is predatory, acting upon the young and pre-adult...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Penaeus paulensis; Populational structure; Growth; Migration; Conceição Lake.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000200008

Biologia reprodutiva de Oligosarcus jenynsii (Günther) (Characiformes, Characidae) da Lagoa das Custódias, Tramandaí, Rio Grande do Sul, Brasil
Provedor de dados: 104
Autores: Fialho,Clarice B.; Schifino,Lucia C.; Verani,José Roberto.
The Custódias lagoon has a great importance in the Tramandaí system, because it works as reproduction area, feeding and nursery grounds to several fish species. The aim of this work is the study of aspects related to the reproduction of Oligosarcus jenynsii (Günther, 1864) as such as reproductive period, sexual ratio, fecundity and size of the first gonadal maturation. The specimens were sampled monthly from October/1994 to October/1995. For each sex, maturation curves were established, based on the monthly variation of the gonadossomatic index mean values, as well as, the relative frequencies of the sexual maturity stages. Breeding seasons took place during the winter and spring. The sex ratio was significanthly different from 1:1, with more females than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Characi formes; Oligosarcus jenynsii; Fecundity; Reproduction.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000300020

Dinâmica da alimentação natural de Callinectes danae Smith (Decapoda, Portunidae) na Lagoa da Conceição, Florianôpolis, Santa Catarina, Brasil
Provedor de dados: 104
Autores: Branco,Joaquim Olinto; Verani,José Roberto.
From March/91 to February/92 monthly collcction surveys were carried out to obtain basic information about the dynamics of feeding and trophic spectrum of C. danae Smith, 1869. A total of 456 males and 527 females were caught. The diet of the species was not sex related. The trophic spectrum of C. danae is composed by a high number of items. The 35 items were assembled in 14 categories and the feeding index was applied. Mollusca, Polychaeta and Crustacea were observed to be basic elements in the species diet, Osteichthyes and MOND appear as secondary resource whereas vegetal material were found to be of less importance.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Portunidae; Callinecles danae; Feeding habits; Lagoa da Conceição.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000400014

Influence of environmental quality of the tributaries of the Monjolinho River on the relative condition factor (Kn) of the local ichthyofauna
Provedor de dados: 49
Autores: Barrilli,Germano Henrique Costa; Rocha,Odete; Negreiros,Natalia Felix; Verani,José Roberto.
The relative condition factors (Kn) of the fishes Astyanax paranae, Phalloceros harpagos and Poecilia reticulata were used as a means of assessing the influence of environmental conditions on the well-being of sub - populations of these species, with the eventual aim of using them as bioindicators of disturbance in tributary streams of the Monjolinho River, in São Carlos - SP. The power-law curve generated by the length-weight relationship indicated a positive allometric growth for the three species studied. Overall, the canonical correspondence analysis (CCA) positively correlated average Kn of A. paranae with well oxygenated and oligotrophic environments, typical of conserved areas or near the natural state. For the average value of Kn obtained for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomonitoring; Condition factor; Length-weight relationship; Degradation; Bioindicators.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000100104

Natural Diet of Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae) in the Itapocoroy Inlet, Penha, SC, Brazil
Provedor de dados: 52
Autores: Branco,Joaquim Olinto; Lunardon-Branco,Maria José; Verani,José Roberto; Schveitzer,Rodrigo; Souto,Flávio Xavier; Vale,William Guimarães.
From January to December 1995, 332 individuals of the Callinectes ornatus species were collected from the Itapocoroy inlet in Penha, Sta. Catarina, Brazil to study its natural diet and the seasonal variations of diet. Results showed a diversified trophic spectrum with a generalized dietary strategy comprising the algae, macrophyta, foraminiferida, mollusca, polychaeta, crustacea, echinodermata, Osteichthyes and NIOM (Nonidentified Organic Matter) groups.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: C. ornatus; Portunidae; Natural diet; Dietary habits; Dietary ecology.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000100006

Fish community composition, seasonality and abundance in Fortaleza Lagoon, cidreira
Provedor de dados: 52
Autores: Schifino,Lúcia Cabral; Fialho,Clarice Bernhardt; Verani,José Roberto.
The Fortaleza Lagoon belongs to the Southern Tramandaí subsystem, formed by lagoons disposed linearly on the north-south direction (30º 08’S, 50º 13’W). The objective of this study was to describe some aspects related to the composition of the fish community of Fortaleza Lagoon. Samples were collected monthly from November 1998 to October 1999. The specimens were captured at four previously determined points in the lagoon, and classified in five orders, 12 families and 22 species. Cyphocharax voga, Hyphessobrycon luetkenii, Oligosarcus jenynsii, Oligosarcus robustus and Loricariichthys anus were more abundant species. Amongst the sampled species only two could not be characterised as freshwater species: Centropomus sp (marine) and Lycengraulius grossidens...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Freshwater fishes; Coastal lagoons; Rio Grande do Sul; Brazil.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000500011

Population structure and condition factor of Pseudotothyris obtusa (hypoptopomatinae) from three coastal streams in southern Brazil
Provedor de dados: 52
Autores: Takeuti,Denise de Freitas; Verani,José Roberto; Aranha,José Marcelo Rocha; Menezes,Márcia Santos de.
Population structure features and condition factor of Pseudotothyris obtusa were compared between three coastal streams in southern Brazil. Fishes were monthly collected through electric fishing and measured in the total length. Fifteen fishes from each stream were dissected to identify their sex. The structure in size, sex ratio and young/adults ratio of populations were analysed and the length-weight relationship was obtained. The condition factor (K1) and the relative condition factor (Kn) were calculated for each stream. Fishes were grouped in 11 lenght classes of 3mm. The intermediate and bigger size classes were preponderant in the "Mergulhão" and "Colônia Pereira" streams, and the smaller and intermediate ones in the "Ribeirão" stream. Females...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coastal streams; Pseudotothyris obtusa; Hypoptopomatinae; Population structure; Condition factor.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000400004

Diet of the clupeid fish Platanichthys platana (Regan, 1917) in two different Brazilian coastal lagoons
Provedor de dados: 52
Autores: Aguiaro,Talita; Castelo Branco,Christina Wyss; Verani,José Roberto; Caramaschi,Érica Pellegrini.
Platanichthys platana is considered a constant species in both Cabiúnas and Imboassica lagoons that are characterised by different marine and freshwater inputs, and anthropogenic influences. The stomach content analysis of P. platana captured between July 1991 and July 1993 revealed filamentous algae, detritus, eggs of benthic invertebrates, larvae of chironomids and bivalves as the main food sources in Imboassica lagoon. Small-sized cladocerans, copepods and shrimp larvae were the prevailing items in Cabiúnas lagoon. Seasonal food variations were noted for the fishes of Imboassica lagoon. Diet differences were highlighted within specimens lesser than 40 mm standard length in Imboassica lagoon, and were related to the increase of marine influence due to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Coastal lagoons; Food items; Platanichthys platana.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000200013

Seasonal Variation in the Abundance of Seabirds in Areas of Mariculture
Provedor de dados: 52
Autores: Branco,Joaquim Olinto; Braun,Jan Raphael Reuter; Verani,José Roberto.
Mariculture has emerged as a complementary income for small fishermen along the coast of the state of Santa Catarina, Brazil, causing significant alterations in the coastal landscape and creating a new substratum seabirds. From March 1998 to February 1999, 48 censuses were carried out at four sample times, registering an average annual occurrence of 4448.7 birds, distributed among five seabird species. Laridae dominated in diversity and abundance, contributing with 98.1% of the birds recorded. The number of birds per float varied depending on the time of day and season of the year, showing an average of 2.09/1. Seabirds use the mariculture area as a place to rest, to clean their feathers and to overnight.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seabirds; Area of mariculture; Itapocoroy inlet.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000400009

Induced reproduction and reproductive characteristics of Rhinelepis aspera Agassiz, 1829 (osteichthyes: Siluriformes, Loricariidae)
Provedor de dados: 52
Autores: Sato,Yoshimi; Fenerich-Verani,Nelsy; Verani,José Roberto; Godinho,Hugo Pereira; Sampaio,Edson Vieira.
Rhinelepis aspera is the largest Loricariidae species found in the São Francisco river basin where it is now rarely caught. Brooders kept in tanks were hypophysed with crude carp pituitary extract (CCPE). Approximately 82% of the females responded positive to the treatment. The egg was opaque, demersal, round, yellow and adhesive. Egg stripping was done at 212 hour-degrees (= 8.2 h) after application of the second dose of CCPE (water temperature = 25-26 ºC). Hatching of the larvae occurred at 1022 hour-degrees (= 42.2 h), after fertilization of the eggs (water temperature =24-25 ºC). Fertilization rate of the eggs was 72%. Absolute fecundity (AF), initial fertility (IF) and final fertility (FF) in relation to the females' body weight are expressed,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hypophysation; Rhinelepis aspera; Siluriformes; São Francisco River.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000300006