scholarly journals Temporal Dynamics of Reproduction inHemiramphus brasiliensis(Osteichthyes: Hemiramphidae)

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Mônica Rocha de Oliveira ◽  
Sathyabama Chellappa
Keyword(s):  
Coastal Waters ◽  
Sexual Maturity ◽  
Temporal Dynamics ◽  
Gonadosomatic Index ◽  
Gonad Development ◽  
Reproductive Period ◽  
Northeastern Brazil ◽  
Histological Studies ◽  
Multiple Spawner ◽  
Maturation Stages

The reproductive aspects ofHemiramphus brasiliensiswere analyzed with a view to verify the temporal dynamics of reproduction. This paper presents data on sex ratio, length at first sexual maturity, macroscopic and histological aspects of gonad development, gonadosomatic index (GSI), reproductive period, and fecundity ofH. brasiliensis. The fishes were captured from the coastal waters of Rio Grande do Norte, northeastern Brazil. Females of this species predominated in the sampled population and were larger in size than the males. The length at the first sexual maturation of males was 20.8 cm and that of females was 21.5 cm. The macroscopic characteristics of the gonads indicated four maturation stages. Histological studies of gonads ofH. brasiliensisshowed six phases of oocyte development and four phases of spermatocyte development. The batch fecundity of this species was 1153 (±258.22) mature oocytes for 50 g body weight of female. The microscopic characteristics of gonad development indicate thatH. brasiliensisis a multiple spawner, presenting a prolonged reproductive period during the whole year, with a peak in the month of April, and is considered as an opportunistic strategist.

scholarly journals Gonad development and reproduction of the ballyhoo half beak, Hemiramphus brasiliensis from the coastal waters of Rio Grande do Norte, Brazil

2015 ◽  
Vol 75 (2) ◽  
pp. 324-330
Author(s):  
MR. Oliveira ◽  
NB. Silva ◽  
ME. Yamamoto ◽  
S. Chellappa
Keyword(s):  
Coastal Waters ◽  
Sexual Maturity ◽  
Gonad Development ◽  
Rio Grande ◽  
Reproductive Period ◽  
Batch Fecundity ◽  
Histological Studies ◽  
Rainy Period ◽  
Multiple Spawner ◽  
Maturation Stages

The gonad development and reproductive aspects of Hemiramphus brasiliensis from the coastal waters of Rio Grande do Norte, Brazil were verified. This paper presents data on the length-weight relationship, sex ratio, length at first sexual maturity, gonad development, reproductive period and fecundity of H. brasiliensis. Females of this species predominated in the sampled population and were larger in size than the males. The length at the first sexual maturation of males was 20.8 cm and that of females was 21.5 cm. The macroscopic characteristics of the gonads indicated four maturation stages. Histological studies of gonads of H. brasiliensis showed six phases of oocyte development and four phases of spermatocyte development. The batch fecundity of this species is 1153 (±258.22) oocytes for 50 g body weight of female. The microscopic characteristics of gonad development indicate that H. brasiliensis is a multiple spawner, with active reproductive period during the months of January to June and October. The reproductive period of this species is independent of the rainy period of the region.

scholarly journals Reproductive indicators of the endemic species Astyanax bifasciatus (Teleostei: Characidae) in a tributary of the Lower Iguaçu River Basin, Brazil

2019 ◽  
Vol 41 ◽  
pp. e47720
Author(s):  
Elton Celton de Oliveira ◽  
Alexandre Augusto Auache-Filho ◽  
Denis Damasio ◽  
Nédia de Castilhos Ghisi ◽  
Maria Antônia Michels-Souza
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Sexual Maturity ◽  
Gonadosomatic Index ◽  
Reproductive Period ◽  
Maturity Stage ◽  
Reproductive Process ◽  
Maturation Stages ◽  
High Degree ◽  
Iguaçu River

The reproductive process promotes morphophysiological and behavioral changes in fish species throughout their life cycle. Its success is vital to define their resilience in the environment. This study aimed to evaluate the reproductive biology of the endemic fish species Astyanax bifasciatus in a tributary of the Lower Iguaçu River Basin, Paraná, Brazil. Fish were collected monthly at four sites along the Jirau Alto River in the city of Dois Vizinhos from October 2015 to September 2016. A standardized catch effort with gill nets and fish traps was used. In the laboratory, standard length and total weight were recorded. After anesthesia, the animals were sectioned to macroscopically determine the sex, sexual maturity stage, and presence of celomatic fat. The gonads and liver were removed to determine the gonadosomatic and hepatosomatic indexes, respectively. A total of 160 individuals (104 females and 56 males) were used. The gonadosomatic index, frequency of the gonadal maturation stages, and condition factor showed a long reproductive period with two investment cycles for both sex. Length at first sexual maturity was 4.57 cm for females and 3.56 cm for males. The reproductive data corroborate the generalist profile of the species and demonstrate a high degree of adaptive capacity, even in smaller tributaries.

scholarly journals Reproductive period and fecundity of Serrapinnus piaba (Characidae: Cheirodontinae) from the rio Ceará Mirim, Rio Grande do Norte, Brazil

2003 ◽  
Vol 1 (1) ◽  
pp. 61-66 ◽  
Author(s):  
Jacira Silvano ◽  
Cristina L. C. Oliveira ◽  
Clarice B. Fialho ◽  
Hélio C. B. Gurgel
Keyword(s):  
Gonadosomatic Index ◽  
Rio Grande ◽  
Total Body Weight ◽  
Mature Female ◽  
Reproductive Period ◽  
Day Length ◽  
Maturation Stages ◽  
Total Body ◽  
Spearman Test ◽  
Test Correlation

Specimens of Serrapinnus piaba were collected monthly from April 2001 to April 2002 in the rio Ceará Mirim, Rio Grande do Norte State, Brazil. The reproductive period, determined through the monthly variation of the gonadosomatic index (GSI) and maturation stages, occurred from January to April. Non-parametric Spearman test was performed in order to test correlation of monthly GSI variation in males and females with water temperature, rainfall and day length. Rainfall and Temperature were correlated with GSI variation in females only and day length showed a negative correlation with GSI variation of males only. It was verified the presence of hooks on the anal fin of mature and maturing males along all the period of study. The absolute fecundity mean was 441 (±178.08) oocytes, determined by the number of yolky oocytes counted in 27 mature female gonads. The relative fecundity, estimated by the number of yolky oocytes divided by milligram of total body weight was 0.74 (± 0.19).

scholarly journals Reproductive biology of a tetragonopterinae (osteichthyes, characidae) of the Ubatiba fluvial system, Maricá - RJ

1999 ◽  
Vol 42 (4) ◽  
Author(s):  
Rosana Mazzoni ◽  
Jaqueline Petito
Keyword(s):  
Sexual Dimorphism ◽  
Reproductive Biology ◽  
Sexual Maturity ◽  
Gonadosomatic Index ◽  
Oocyte Diameter ◽  
Fluvial System ◽  
Development Stages ◽  
Maturation Stages ◽  
Mean Size ◽  
Reproduction Period

Aspects of the reproductive biology of one Tetragonopterinae was assessed in the Ubatiba river - Maricá / RJ. Length structure and mean size suggested sexual dimorphism, females reaching larger sizes than males. The onset of sexual maturity occured at 2.8cm for both the sexes. Fecundity, determined on ripe ovaries, showed positive correlation to females size and weight and varied from 595 to 5520 for 3.9cm and 6.2cm lengths respectively. The spawning type, defined as total, was determined by the oocyte diameter frequency from ovaries in different development stages. The frequency distribution of ovarian/testis maturation stages, associated with the temporal variation of the gonadosomatic index, suggested that the reproduction period was prolonged along the whole annual cycle.

scholarly journals Aspects of fishing and reproduction of the black grouper Mycteroperca bonaci (Poey, 1860) (Serranidae: Epinephelinae) in the Northeastern Brazil

2004 ◽  
Vol 2 (1) ◽  
pp. 19-30 ◽  
Author(s):  
Simone Ferreira Teixeira ◽  
Beatrice Padovani Ferreira ◽  
Isaíras Pereira Padovan
Keyword(s):  
Size Structure ◽  
Ovarian Tissue ◽  
Gonadosomatic Index ◽  
Testicular Tissue ◽  
Gonadal Development ◽  
Northeastern Brazil ◽  
Multiple Spawner ◽  
Mycteroperca Bonaci ◽  
Fisheries Statistics ◽  
Feeding Aggregation

The reproductive biology of the black grouper Mycteroperca bonaci, caught by artisanal fishermen using hook and line or compressor - assisted spear fishing, from the Northeastern shelf and oceanic banks of Brazil, was studied between August 1996 and April 1998. The sexual pattern, gonadal development, the spawning mode and seasonality were investigated. The gonadal stages indicated that this species is a protogynous hermaphrodite and that transition from female to male occurs through simultaneous re-absorption of ovarian tissue and proliferation of testicular tissue in the gonads. The specie is a multiple spawner and frequency analysis of gonadal stages and gonadosomatic index suggest that the spawning season occurs between April and September. Considerations about the fisheries, related to size structure of fishes caught, were based on length frequency distribution. The phenomenon of "correção" was described based on ethnobiology studies and informations from the Northeast Fisheries Statistics Bulletin of the Brazilian Environmental Institute (IBAMA). The phenomenon of the "correção" undergone by Mycteroperca bonaci seems to be a Southward chain reaction (of the State of Ceará to Bahia) and is a feeding aggregation.

scholarly journals Reproductive aspects of the flyingfish, Hirundichthys affinis from the Northeastern coastal waters of Brazil

2015 ◽  
Vol 75 (1) ◽  
pp. 198-207 ◽  
Author(s):  
MR. Oliveira ◽  
MM. Carvalho ◽  
NB. Silva ◽  
ME. Yamamoto ◽  
S. Chellappa
Keyword(s):  
Sex Ratio ◽  
Coastal Waters ◽  
Sexual Maturity ◽  
Total Body Length ◽  
Gonadal Development ◽  
Biological Information ◽  
Gonad Maturation ◽  
Fishery Resource ◽  
Maturation Stages ◽  
Total Body

The epipelagic flyingfish, Hirundichthys affinis is a major artisanal fishery resource from the Northeastern coastal waters of Brazil. However, biological information about this species has been poorly documented. This paper presents data on the length-weight relationship, sex ratio, length at first sexual maturity, gonadal development and fecundity of H. affinis sampled from the coastal waters of Rio Grande do Norte, Brazil. The total body length and weight for both sexes ranged from 23.4 to 29.4 cm and from 89 to 188g, respectively. The allometric coefficient of males was 2.208 and that of females was 2.985, indicating negatively allometric growth. The sex ratio was 1M:1.6F thus differing from the expected ratio of 1:1 (χ2 = 18.63). The total length at first sexual maturity was estimated at 27.3 cm for males and 27.1 cm for females. The macroscopic characteristics of the gonads indicated four maturation stages. Histological studies of gonads of H. affinis showed seven phases of oocyte development and four phases of spermatocyte development. The mean absolute fecundity was 9092 vitelogenic oocytes. Spawning occurred during the months of March to July. The microscopic descriptions of the stages of gonad maturation indicate that the study area is an important spawning ground of H. affinis.

scholarly journals Reproduction of Carangoides vinctus (Perciformes: Carangidae) in the Mexican Central Pacific

2017 ◽  
Vol 44 (3) ◽  
pp. 610-622
Author(s):  
Gabriela Lucano-Ramírez ◽  
Estrella G. Rivera-Rios ◽  
Salvador Ruiz-Ramírez ◽  
Gaspar González-Sansón ◽  
Alejandro Perez-Toledo
Keyword(s):  
Sexual Maturity ◽  
Gonadosomatic Index ◽  
Reproductive Period ◽  
Oocyte Diameter ◽  
Central Pacific ◽  
Gonadal Maturity ◽  
Three Stages ◽  
Development Phases ◽  
Post Spawning ◽  
Average Catch

This study aims to determine some aspects of the reproduction of Carangoides vinctus, a species caught by the artisanal fishery on the south coast of Jalisco. The captures were made monthly with gillnets from January 1998 to December 2008. The organisms had total length of 17.0 to 41.2 cm, with females averaging 30.1 cm and 30.5 cm males. The sex ratio was 1.0: 1.1 males per females, which is not significantly different from the expected 1:1. A gonadal maturity scale of four stages for both sexes (immature, developing, spawning capable and post-spawning or spent) was used. In the first three stages of the ovary’s development, a septum dividing each lobe was present. In the analysis of oogenesis, seven oocyte development phases were identified and the oocytes developed asynchronously within the ovary. Based on the microscopic characteristics observed in the testis, it showed a lobular type development. The maximum values of the gonadosomatic index, the percentage of mature gonads and the oocyte diameter suggest that C. vinctus has a reproductive period from March to May. The length at sexual maturity (L50) was estimated at 26.04 and 23.77 cm for females and males, respectively; these sizes are lower than the average catch size in both sexes, suggesting that organisms are caught commercially when they have reached sexual maturity.

scholarly journals Aspects of Reproductive Ecology of Chrysichthys Auratus in the Volta Lake, Ghana

2020 ◽  
Vol 3 (3) ◽  
Keyword(s):  
Reproductive Strategy ◽  
Sexual Maturity ◽  
Gonadosomatic Index ◽  
Gonad Development ◽  
Critical Length ◽  
Monthly Basis ◽  
Fish Food ◽  
Spawning Period ◽  
Volta Lake ◽  
Fish Samples

The study was conducted in 2018, on the Chrysichthys auratus in the Volta Lake, due to its socio-economic importance to the many and varied dependent fishermen, fish processors and fish traders. The objective was to determine the reproductive strategy to facilitate sustainable management of the fish stocks. A total of 452 fish samples collected on monthly basis were measured, weighed and dissected for determination of, sexual maturity, sex ratio, gonadosomatic index GSI, hepasomatic index HSI, condition factor k, visceral fat index VFI, and monthly stomach fullness in relation to sexual maturity. According to the length at first maturity determined, 89% of the female fish caught, fell below that critical length, suggesting growth overfishing, attributed to size and sex selective tendencies of bamboo pipe fishing. During gonad development, the correlation of the GSI to the HSI and the VFI was inverse and insignificant but in the post gonad development phase it switched to a positive and insignificant relationship. The point of switch, in September, was synonymous with spawning and indicative of the spawning period. It was concluded that the reproductive strategy was to time the spawning process, in September, to coincide with the upwelling phenomenon (June – September), associated with fish food abundance, thereby enhancing the survival of the offspring. A seasonal ban on fishing and a total ban on bamboo pipe fishing were recommended.

scholarly journals Reproductive biology of Bryconamericus stramineus Eigenmann, 1908 (Ostariophysi: Characidae) from the Rio Ibicuí, RS, Brazil

2007 ◽  
Vol 50 (6) ◽  
pp. 995-1004 ◽  
Author(s):  
Vinicius Renner Lampert ◽  
Marco Aurélio Azevedo ◽  
Clarice Bernhardt Fialho
Keyword(s):  
Reproductive Period ◽  
Day Length ◽  
Hepatosomatic Index ◽  
Weak Correlation ◽  
Gonadal Maturation ◽  
Multiple Spawner ◽  
Fin Ray ◽  
Maturation Stages ◽  
Index Rainfall ◽  
The Mean

Reproduction of Bryconamericus stramineus was described based on the analysis of 208 females and 166 males collected monthly in the Rio Ibicuí, from April 2001 through March 2002. Reproduction occurred between September and December, with a lower peak in February. The mean absolute fecundity was 371.3 (± 244.6) oocytes and the mean relative fecundity was 0.35 (± 0.08) oocytes/mg of total weight and the fish was a multiple spawner. A weak correlation between GSI of males and day length was observed. Other parameters (stomach repletion and hepatosomatic index, rainfall and temperature) did not show any correlation with GSI. However, some of these factors might act as "starters" of gonadal maturation. The presence and frequency of fin ray hooks on the males was compared with the gonadal maturation stages, months and standard length classes. Well-developed hooks were found mainly in the mature males during the reproductive period and in the largest individuals.

scholarly journals Reproductive biology of Parona signata (Actinopterygii: Carangidae), a valuable economic resource, in the coastal area of Mar del Plata, Buenos Aires, Argentina

2020 ◽  
Vol 18 (3) ◽  
Author(s):  
Santiago Julián Bianchi ◽  
Mariano González-Castro
Keyword(s):  
Reproductive Biology ◽  
Histological Analysis ◽  
Gonadosomatic Index ◽  
Reproductive Activity ◽  
Diameter Distribution ◽  
Oocyte Diameter ◽  
Economic Resource ◽  
Multiple Spawner ◽  
Maturation Stages ◽  
Female Relative

ABSTRACT The reproductive biology and life cycle of Parona leatherjacket, Parona signata, present in Mar del Plata (38º 00’S 57º 33’W) coast, was studied. Samples were obtained monthly since January 2018 to February 2019 from the artisanal fishermen and the commercial fleet of Mar del Plata. A histological analysis was carried out and the main biologic-reproductive parameters were estimated: fecundity, oocyte frequency distribution and gonadosomatic index (GSI). Both the macroscopic and microscopic analyses showed reproductive activity in March and November. Mature females were recorded, which showed hydrated oocytes, as was evidenced by the histological procedures. Both, the histological and the oocyte diameter distribution analyses showed the presence of all oocyte maturation stages in ovaries in active-spawning subphase, indicating that P. signata is a multiple spawner with indeterminate annual fecundity. Batch fecundity ranged between 36,426 and 126,035 hydrated oocytes/ female. Relative fecundity ranged between 42 and 150 oocytes/ g female ovary free.

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