scholarly journals The reproductive biology of the rainbow runner, Elagatis bipinnulata (Quoy & Gaimard, 1825) caught in the São Pedro and São Paulo Archipelago

2011 ◽  
Vol 71 (1) ◽  
pp. 99-106 ◽  
Author(s):  
PB Pinheiro ◽  
FHV Hazin ◽  
P Travassos ◽  
PGV Oliveira ◽  
F Carvalho ◽  
...  
Keyword(s):  
Reproductive Biology ◽  
Histological Analysis ◽  
Gonad Index ◽  
Fork Length ◽  
Sao Paulo ◽  
São Paulo ◽  
Spawning Period ◽  
First Semester ◽  
Maturation Stages ◽  
Length Width

The rainbow runner, Elagatis bipinnulata, which belongs to the Carangidae family, has a circumtropical distribution. It is found throughout the Atlantic Ocean, from Massachusetts (USA) to Bahia (Brazil). The reproductive biology of the rainbow runner was studied, using specimens captured off the São Pedro and São Paulo Archipelago. From July 1999 to November 2003, a total of 352 fishes were analysed (201 females and 151 males). Fork length (FL) was measured and specimens were gutted for gonads collection. In the laboratory, gonads length, width and weight were measured, and sexes identified macroscopically. Through histological analysis, five different maturation stages were identified for females: immature, maturing, mature, spent and resting. A predominance of maturing and mature females was observed from January to May. The highest gonad index (GI) values were also observed during this period, ranging from 7.7 to 55. Mean sexual maturity size (L50) for females was estimated at 64.6 cm (FL). In the studied area the species exhibited total spawning, with two synchronous groups. Testicles were histologically very similar making them impossible to differentiate sexual maturation stages. Considerable variation was observed in the male gonads weight, hampering the assessment of size at maturity. However, GI values for males were also higher from January to May. These results suggest that the spawning period of the rainbow runner in the São Pedro and São Paulo Archipelago occurs during the first semester of the year.

scholarly journals Reproductive biology of Palythoa caribaeorum and Protopalythoa variabilis (Cnidaria, Anthozoa, Zoanthidea) from the southeastern coast of Brazil

2005 ◽  
Vol 65 (1) ◽  
pp. 29-41 ◽  
Author(s):  
H. K. Boscolo ◽  
F. L. Silveira
Keyword(s):  
Reproductive Biology ◽  
High Frequency ◽  
Sao Paulo ◽  
São Paulo ◽  
Southeastern Coast ◽  
Female Sex ◽  
Sperm Release ◽  
Palythoa Caribaeorum ◽  
Maturation Stages

The reproductive biology of Palythoa caribaeorum (Duchassaing & Michelotti 1860) and Protopalythoa variabilis (Duerden 1898) was studied through monthly samples from tagged colonies from June 1996 to June 1997, in São Sebastião channel, São Paulo, Brazil (45º26'W, 23º50'S). The gametogenesis was similar to that of other zoanthids as shown by histological preparations. Oocyte diameters and maturation stages of testis vesicles were evaluated on squash preparations. Both species showed sequential protogynic hermaphroditism, with high frequency of fertile polyps (83% in P. variabilis and 72% in P. caribaeorum), high frequency of colonies in female sex condition (65.3% of P. variabilis and 41.7% of P. caribaeorum), and apparently continuous gametogenesis. In P. caribaeorum, egg release was continuous and sperm release took place during half of the analyzed period. In P. variabilis, egg and sperm release occurred in April-May and February-March 1997, respectively.

Reproductive biology and population structure of Potimirim brasiliana Villalobos, 1959 (Decapoda, Atyidae) from a littoral fast-flowing stream, São Paulo State, Brazil

Crustaceana ◽  
2013 ◽  
Vol 86 (1) ◽  
pp. 67-83 ◽  
Author(s):  
Sergio Schwarz Da Rocha ◽  
Roberto Munehisa Shimizu ◽  
Sergio L. De Siqueira Bueno ◽  
Fernando L. Mantelatto
Keyword(s):  
Population Structure ◽  
Reproductive Biology ◽  
Sao Paulo ◽  
São Paulo ◽  
Paulo State ◽  
São Paulo State ◽  
Flowing Stream

Relative Growth of the Speckled Swimming Crab Arenaeus Cribrarius (Lamarck, 1818) (Brachyura, Portunidae), Near Ubatuba, State of São Paulo, Brazil

Crustaceana ◽  
1993 ◽  
Vol 65 (3) ◽  
pp. 377-389 ◽  
Author(s):  
Marcelo Antonio Amaro Pinheiro ◽  
Adilson Fransozo
Keyword(s):  
Carapace Width ◽  
B Value ◽  
Sao Paulo ◽  
São Paulo ◽  
Western Atlantic ◽  
Positive Allometry ◽  
Relative Growth ◽  
Maturation Phase ◽  
Length Width ◽  
Independent Variable

AbstractArenaeus cribrarius is a mainly tropical crab that occurs in the Western Atlantic Ocean, Brazil being its type-locality. The species ranges from Vineyard Sound, Massachusetts, USA to La Paloma, Uruguay. Information about this species is scarce. The relative growth ofA. cribrarius was analyzed, based on some morphometric relations, where the carapace width, excluding lateral spines (CW), was used as an independent variable. A total of 403 specimens (189 males and 214 females), was collected in Ubatuba, State of São Paulo, Brazil, with otter-trawls. The animals were sexed and sorted to maturation phase (juvenile or adult). Some measurements were made: carapace (length and width excluding lateral spines), abdomen (greatest width of the fifth somite in females and the sixth in males) and major chela (greatest length, width and height, dactylus length). This study was made by the application of the power function (y=a.xb) which was fitted to the data and the pattern of growth established for each parameter by the "b"-value (constant of allometry), as positive allomctry (b>1), negative allometry (b<1) or isometry (b=1). The morphometric relations of the carapace showed a tendency to isometry. In females, the abdominal width grew in positive allometry, higher in juveniles (b= 1.33) than in adults (b=1.18). In this case, an overlap and discontinuity was noticed between the phases over a carapace width range of 55 to 70 mm, where the puberty molt occurs. The majority of relationships showed that the major chela of the males grew in positive allometry, however, the greatest allometric difference between the phases was observed towards the propodus length with 1.09 as juvenile and 1.26 as adult "b"values. In the males, this variable showed an inflection between the CW range of 45 to 55 mm, where the transition to the maturation phase occurs. The relative growth of this species is similar to those of previously studied species. This indicates, that the propodus length and the abdominal width are the morphometric variables most appropriate to estimate the size at the beginning of the sexual maturity for males and females of this species, respectively.

scholarly journals Fishery, diet composition and reproductive biology of the dolphinfish Coryphaena hippurus (Linnaeus, 1758) off Karnataka, south-west coast of India

2016 ◽  
Vol 63 (4) ◽  
Author(s):  
K. M. Rajesh ◽  
Prathibha Rohit ◽  
E. M. Abdussamad
Keyword(s):  
Reproductive Biology ◽  
Diet Composition ◽  
Gradual Increase ◽  
Gonadosomatic Index ◽  
Fork Length ◽  
Spawning Period ◽  
Coryphaena Hippurus ◽  
South West ◽  
South West Coast ◽  
Index Of Relative Importance

Fishery, diet composition and reproductive biology of the dolphinfish Coryphaena hippurus (Linnaeus, 1758) landed along Karnataka Coast during 2013-15 were studied. The estimated average landing of the species in India during the study period was 7975 t of which Karnataka contributed 2.73% (218 t). The fish is mainly exploited by gillnet and also by troll lines operated from trawlers. A few stray specimens were also landed by purse seines. The fork length (FL) was in the range of 32-128 cm and fishes in the length range (FL) of 55-90 cm dominated the catch, contributing 79.8% of the total landings. The most dominant prey item, in terms of occurrence (70.57%) and weight (83.18%) were finfishes followed by cephalopods (19.62% by occurrence and 13.66% by weight) and crustaceans (7.01% occurrence and 1.32% by weight). The index of relative importance (IRI ) values were 85.3, 13.39 and 0.68% respectively for fish, cephalopods and crustaceans respectively. Sex ratio (1:2.05) indicated dominance of females in the fishery. Presence of mature and spent specimens throughout the year suggests that the species spawns all through the year. Peak spawning period was from June to September. This coincided with gradual increase in gonadosomatic index (GSI) values ahead of May which reached a peak during August-September.

scholarly journals Expectations, perceptions and motivations of students at a Public School of High School in Brazil

2020 ◽  
pp. 32-43
Author(s):  
Carla Viana Dendasck ◽  
Lucas Facco ◽  
Amanda Alves Fecury ◽  
Euzébio de Oliveira ◽  
Cláudio Alberto Gellis de Mattos Dias
Keyword(s):  
High School ◽  
High School Students ◽  
Formal Education ◽  
Sao Paulo ◽  
Goal Theory ◽  
Public High School ◽  
São Paulo ◽  
School Students ◽  
First Semester ◽  
Qualitative And Quantitative Study

The achievement goal theory seeks to understand the set of factors, such as: thoughts, beliefs, motivations, purposes and emotions that lead the development of the individual’s performance (in this case, the students) to act, and, consequently, to translate into their results actions. The objective of this research was to investigate the expectations, perceptions and motivations of students from a public high school in the interior of São Paulo. The qualitative and quantitative study was carried out in a public high school, located in a city in the interior of the State of São Paulo, in the first semester of 2019. The separation of parents can sometimes be a problematic factor for student life. Students whose parents have literacy and longer formal education tend to remain literate and evolve in the educational field. High school students seek to complete their studies and move on to higher education in order to achieve personal life goals. A large proportion of students do not understand the real role of attending school

scholarly journals Rare data on a rocky shore fish reproductive biology: sex ratio, length of first maturation and spawning period of Abudefduf saxatilis (Linnaeus, 1758) with notes on Stegastes variabilis spawning period (Perciformes: Pomacentridae) in São Paulo, Brazil

2007 ◽  
Vol 55 (3) ◽  
pp. 199-206 ◽  
Author(s):  
Eduardo Bessa ◽  
June Ferraz Dias ◽  
Ana Maria de Souza
Keyword(s):  
Rocky Shore ◽  
Sao Paulo ◽  
Reproductive Period ◽  
Maturation Stage ◽  
Northern Coast ◽  
São Paulo ◽  
Visual Census ◽  
Spawning Period ◽  
Paulo State ◽  
Males And Females

This study presents data on the reproduction of Abudefduf saxatilis, a rocky shore inhabitant at the northern coast of São Paulo State. A total of 73 individuals were collected using hooks and baits. They were measured, weighed and dissected, sex and maturation stage were analysed, first macroscopically, then part of the material was taken for microscopical confirmation. Visual censuses were also done for underwater observation of egg's presence. Results showed equivalence of males and females in the population, first maturation occurring between 101 and 115mm of total length, spawning period occurs from November to February for Abudefduf saxatilis and October to January for Stegastes variabilis. Reproductive period for A. saxatilis was positively related to air temperature and thermic amplitude, but the environmental clue most likely to influence this rhythm is photoperiod. Transects with visual census of males guarding eggs were also a reliable tool for finding reproductive period in these demersal, egg-guarder species.

scholarly journals A Importância do Ambiente Virtual de Aprendizagem em um Curso de Graduação com Base nas Percepções de Alunos a Distância

EAD em FOCO ◽  
2015 ◽  
Vol 5 (3) ◽  
Author(s):  
Thaís Tenório ◽  
Marilda Adlong Laudelino ◽  
André Tenório
Keyword(s):  
Learning Environment ◽  
Undergraduate Students ◽  
Virtual Learning ◽  
Sao Paulo ◽  
Virtual Learning Environment ◽  
Public Institution ◽  
São Paulo ◽  
First Semester ◽  
Almost All ◽  
E Mail

Foi investigada a dinâmica de utilização do ambiente virtual de aprendizagem (AVA) de um curso a distância de graduação em Engenharia de uma instituição pública de São Paulo. Cinquenta alunos do primeiro semestre participaram da pesquisa. Quase todos acessavam o AVA, baseado no sistema Canvas, semanalmente. As percepções dos alunos foram conhecidas por meio de questionário. Dúvidas e dificuldades manifestadas em encontros presenciais e virtuais também foram registradas. As dificuldades iniciais de manipulação do AVA puderam ser dirimidas ou mitigadas no decorrer do semestre. Os calouros tinham à disposição diversos recursos. Os preferidos para trabalhar conteúdos eram textos complementares e videoaulas, e para comunicação, videoconferência e e-mail. Não obstante, foi sugerido que houvesse listas de questões com respostas on-line e retorno das correções de exercícios. Para os participantes da pesquisa, o AVA facilitava o acesso à informação e fornecia flexibilidade, mas carecia da possibilidade de comunicação imediata com tutores nos momentos desejados.Palavras-chave: Educação a distância; Ambiente Virtual de Aprendizagem; Aluno. The View of E-Learning Undergraduate Students on the Virtual Learning EnvironmentAbstractThe utilization dynamics of the virtual learning environment (VLE) employed of graduation engineering course of a public institution in São Paulo State was investigated. Fifty students on the first semester of the course have participated on the research. Almost all of them accessed weekly VLE based on Canvas learning management system. Doubts and difficulties expressed by the students during face to face and virtual meetings were also recorded. Initial difficulties related to the VLE use could be solved or mitigated during the semester. Many learning resources were made available to students in the VLE. According to the students opinion, complementary literature, video lessons and e-mail were the preferred type studying material. Yet, it was suggested the use of worksheets with answers available online and feedbacks to the correction. To them, the VLE facilitates access to information and provides flexible studying schedules. However, the lack of on-demand live communication with tutors was considered a drawback.Keywords: Distance learning; Virtual Learning Environment; Student.

Reproductive Biology of the Brazilian Lancehead, Bothrops moojeni (Serpentes, Viperidae), from the State of São Paulo, Southeastern Brazil

2017 ◽  
Vol 12 (2) ◽  
pp. 174-181 ◽  
Author(s):  
Selma Maria Almeida-Santos ◽  
Verônica Alberto Barros ◽  
Claudio Augusto Rojas ◽  
Letícia Ruiz Sueiro ◽  
Roberto Harutomi Corrêa Nomura
Keyword(s):  
Reproductive Biology ◽  
Sao Paulo ◽  
The State ◽  
Southeastern Brazil ◽  
São Paulo ◽  
Bothrops Moojeni

scholarly journals Reproduction of a fish assemblage in the state of São Paulo, southeastern Brazil

2007 ◽  
Vol 67 (2) ◽  
pp. 283-292 ◽  
Author(s):  
LM. Gomiero ◽  
FMS. Braga
Keyword(s):  
Parental Care ◽  
Reproductive Biology ◽  
Fish Assemblage ◽  
Reproductive Traits ◽  
River Basins ◽  
Sao Paulo ◽  
The State ◽  
Southeastern Brazil ◽  
São Paulo ◽  
Stage D

Fish reproductions were studied in two river basins (Corumbataí and Jacaré-Pepira basins) in the State of São Paulo, southeastern Brazil. In the Corumbataí basin, four sites were sampled: Cabeça River, Lapa Stream, Passa-Cinco River, and Corumbataí River; in the Jacaré-Pepira basin, three sites were sampled: Tamanduá Stream, Jacaré-Pepira River, and Água Branca Stream. A total of 12 bimonthly samples were made. Fish equipment included gill nets, purse seines, sieves, and traps. The main objective of this study was to characterize the fish assemblage regarding their reproductive biology and to compare these reproductive traits between both river basins. Most individuals with gonads in stage C (mature) and in stage D (empty gonads) were captured in the spring and summer. Multiple spawn and parental care were common strategies, which guaranteed offspring survivorship in unstable conditions.

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