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.

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 Reproductive studies of Anchoa marinii Hildebrand, 1943 (Actinopterygii: Engraulidae) in the nearby-coastal area of Mar Chiquita coastal lagoon, Buenos Aires, Argentina

2015 ◽  
Vol 13 (1) ◽  
pp. 221-228 ◽  
Author(s):  
Sofía López ◽  
Ezequiel Mabragaña ◽  
Juan Martín Díaz de Astarloa ◽  
Mariano González-Castro
Keyword(s):  
Coastal Lagoon ◽  
Coastal Area ◽  
Species Abundance ◽  
Diameter Distribution ◽  
Female Size ◽  
Oocyte Diameter ◽  
Multiple Spawner ◽  
First Results ◽  
Ovulatory Follicles ◽  
Reproductive Events

The aim of the present study provides the first results on the reproductive biology of the anchovy, Anchoa marinii, in a nearby-coastal area of Mar Chiquita coastal lagoon, 37º32'00"S 57º19'00"W, Argentina. To perform this, we employed mainly female gonads, at both microscopic and macroscopic levels. The oocyte diameter distribution and the microscopy analysis of oocytes, showed different batches of growing oocytes, suggesting that the anchovy is a multiple spawner, with constant oocytes recruitment all over the reproductive season. The batch fecundity ranged between 749 and 3,207 oocytes for females, and the relative fecundity ranged from 127 to 422 yolked oocytes per female gram (ovary free). The fecundity estimation has been made with yolked oocytes. No correlation between the fecundity estimation and female size and total weight (without ovary) has been found. The estimated L50 values were 74.13 and 73.76 mm TL for females and males, respectively. Shoals of females in advanced maturity phase were recorded, between December to April in the study area. During this period a significant increase of species abundance was correlated with water temperature increase (above 16°C). This fact, together with the detection of post-ovulatory follicles, indicated the existence of reproductive events in the nearby-coastal area of Mar Chiquita coastal lagoon.

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 Reproductive Biology of Marine Catfish, Arius latiscutatus (Günther, 1864) and Arius gigas (Boulenger, 1911) from the Bays of Guinea

2020 ◽  
pp. 1-13
Author(s):  
Pierre Koivogui ◽  
Yao Aristide Konan ◽  
Bakari Coulibaly ◽  
Essetchi Paul Kouamelan ◽  
Tidiani Koné
Keyword(s):  
Reproductive Biology ◽  
Gonadosomatic Index ◽  
Gonadal Development ◽  
Cold Season ◽  
Oocyte Diameter ◽  
Chi Square ◽  
Coastal Fisheries ◽  
Republic Of Guinea ◽  
Macroscopic Observation ◽  
First Maturity

Background and Objectives: Marine catfish are abundant in the bays of Tabounsou and Sangareah in Republic of Guinea, but the knowledge on their biology is still scanty. The reproductive biology of Arius latiscutatus Günther, 1864 and A. gigas Boulenger, 1911 was studied through monthly sampling, from January to December 2016. Methodology: Fish were caught using gill nets in several sampling sites. Five gonadal stages were described, based on macroscopic observation of gonad form, size, weight, color and oocyte diameter. Results: The population was dominated by males (61%) in A. latiscutatus and females (53%) in A. gigas, showing a sex-ratio of 1:1.54 (Chi-square, P < 0.05) and 1:0.88 (P > 0.05), respectively. The length-weight relationship was a positive allometry for A. latiscutatus and A. gigas, and males (35.37 and 35.47 cm, respectively) reached first maturity earlier than females (39.7 and 40.8 cm, respectively). Changes in the gonadosomatic index (GSI) and in stages of gonadal development showed that A. latiscutatus spawned between April and October, while A. gigas spawned in May to November. The peak of condition factor was observed in June (0.68±0.05) and July (0.55±0.04) in females of A. latiscutatus and A. gigas, respectively. Conclusion: Both species, having only one annual breeding season, A. latiscutatus spawns earlier than A. gigas. Coastal fisheries should be restricted in cold season to preserve the ability of broodstock renewal for these species.

Reproductive seasonality and the gonadal maturation of silver pomfret Pampus argenteus in the Bay of Bengal, Bangladesh

2020 ◽  
Vol 100 (7) ◽  
pp. 1155-1161 ◽  
Author(s):  
Fatema Akhter ◽  
Md. Moudud Islam ◽  
Midori Iida ◽  
Md. Mahiuddin Zahangir
Keyword(s):  
Reproductive Biology ◽  
Bay Of Bengal ◽  
Gonadosomatic Index ◽  
Spawning Season ◽  
Yolk Granule ◽  
Developmental Cycle ◽  
Oocyte Diameter ◽  
Pampus Argenteus ◽  
Ovulatory Follicles ◽  
Silver Pomfret

AbstractThe silver pomfret (Pampus argenteus) is one of the most commercially important marine fish species in the Bay of Bengal, Indian Ocean. However, detailed information on the reproductive biology of silver pomfret is limited for the Bay of Bengal, Bangladesh. To understand their reproductive biology, especially the gonadal developmental cycle and spawning season, a total of 373 individuals were collected monthly from February 2016 to January 2018 and examined. The total length (TL) and weight (TW) of P. argenteus ranged from 18.82–35.73 cm and 89.26–617.60 g, respectively. The highest gonadosomatic index (GSI) values were observed from April–June with a second (smaller) peak in October. The highest oocyte diameter was observed in May (630.50 ± 96.70 μm), when the fish reached full maturity, and the lowest was observed in July (35.10 ± 7.12 μm), when new eggs began their development for the next spawning season. The maximum number of eggs in the ovary were found in the yolk granule stage in May with a number of post-ovulatory follicles, which indicated that the ovaries developed to a peak leading up to the spawning season. A number of spermatids were also seen in males in April–June along with females. From these detailed observations, it may be concluded that P. argenteus shows two spawning peaks, in May–June and October. This observation will be helpful for the artificial breeding, sustainable management and conservation of this species in the study area.

scholarly journals The influence of a large reservoir on the reproductive activity of the white piranha, Serrasalmus brandtii (Lütken, 1875) in Southeast Brazil

2019 ◽  
Vol 19 (2) ◽  
Author(s):  
Nilo Bazzoli ◽  
Viviane Elizabeth de Souza Silva ◽  
Lucas Marcon ◽  
Kleber Biana Santiago ◽  
José Enemir dos Santos ◽  
...  
Keyword(s):  
Hydroelectric Plant ◽  
Gonadosomatic Index ◽  
Reproductive Activity ◽  
Mature Stage ◽  
Large Reservoir ◽  
Sao Francisco River ◽  
Follicle Diameter ◽  
São Francisco River ◽  
Maturation Stages ◽  
Higher Temperature

Abstract: In order to assess the influence of the Três Marias dam on the reproduction of the white piranha, Serrasalmus brandtii, 1569 specimens captured from June 2011 to May 2012 in three sections of the São Francisco River basin were analyzed: section 1 = Três Marias reservoir (TMR); section 2 = São Francisco River (SFR) segment immediately downstream of TMR; and section 3 = SFR segment at the confluence with the Abaeté River. Total length (TL), body weight (BW), gonadosomatic index (GSI), and gonadal maturation stages were determined for each specimen, while vitellogenic follicle diameter, and absolute (AF) and relative (RF) fecundities were also determined for females. Reproductive activity, including spawned females and spermed males, was recorded throughout the year in the three river segments. Higher frequencies of females and males at the maturing/mature stage were found in the November/December and January/February, which coincided with the period of higher temperature, rainfall, and dissolved oxygen concentration. Mean GSI and vitellogenic follicle diameter were higher in sections 1 and 3 than in section 2 (P <0.05), while AF and RF were higher in section 1 (P <0.05) than in sections 2 and 3. The results of the present study showed that S. brandtii had lower reproductive performance in section 2, probably due to thermal disturbances caused by the dam, thus confirming the influence of dams on the reproduction of fish downstream from hydroelectric plant reservoirs.

scholarly journals Reproduction of Pimelodus maculatus(Siluriformes: Pimelodidae) in three section of Grande River basin, downstream Porto Colombia dam, south-eastern Brazil

2013 ◽  
Vol 11 (3) ◽  
pp. 615-623 ◽  
Author(s):  
Alessandro Loureiro Paschoalini ◽  
Violeta da Rocha Perini ◽  
Dirceu Marzulo Ribeiro ◽  
Paulo Sérgio Formagio ◽  
Elizete Rizzo ◽  
...  
Keyword(s):  
Reproductive Success ◽  
Gonadosomatic Index ◽  
Low Frequency ◽  
Reproductive Activity ◽  
Reproductive Period ◽  
Oocyte Diameter ◽  
South Eastern ◽  
Eastern Brazil ◽  
Significant Difference ◽  
Pimelodus Maculatus

The alterations to the hydrologic regime downstream from hydroelectric dams may cause an impact on the reproductive success of fishes. This study aimed to analyse the influence of the physical and chemical parameters of the water of the Grande and Pardo Rivers on gonadal maturation, oocyte diameter, follicular atresia and biological indices of Pimelodus maculatus collected from three river sections: Grande River, downstream from the Porto Colômbia dam (S1), Grande River, downstream from the confluence with the Pardo River (S2) and in the Pardo River channel (S3). Males and females captured in S1 presented significantly higher average values for total length and body weight than those captured in S2 and S3. The gonadosomatic index values were significantly higher in fish collected in S3 and the Fulton condition factor did not show significant differences in fish collected from the three sections. The oocyte diameter, the follicular cells height and the zona pellucida thickness did not show any statistical differences between the sections. Conductivity presented a significant difference between S1 and S3 and during the reproductive period, water transparency presented similar values in the two sampling sections of the Grande River, but a much lower value in the Pardo River. A low frequency of fish with reproductive activity was registered in S1, whereas in S2 and S3 higher frequencies were recorded, emphasising the need of preserving the tributaries for the reproductive success of P. maculatus of the Grande River in south-eastern Brazil.

scholarly journals The reproductive biology of Pinguipes brasilianus Cuvier, 1829 (Osteichthyes: Pinguipedidae) in temperate rocky reefs of Argentina

2015 ◽  
Vol 13 (4) ◽  
pp. 733-744 ◽  
Author(s):  
Gabriela L. Villanueva-Gomila ◽  
Gustavo J. Macchi ◽  
Martín D. Ehrlich ◽  
Alejo J. Irigoyen ◽  
Leonardo A. Venerus
Keyword(s):  
Reproductive Biology ◽  
Gonadosomatic Index ◽  
Ovary Development ◽  
Rocky Reef ◽  
Austral Spring ◽  
Southwest Atlantic ◽  
Multiple Spawner ◽  
Rocky Reefs ◽  
Close Proximity ◽  
Rocky Reef Fish

ABSTRACT Pinguipes brasilianus is a conspicuous and abundant rocky-reef fish inhabiting the Northern Patagonian gulfs of Argentina, Southwest Atlantic. This study describes its reproductive biology in this region. We made macroscopic and histological descriptions of the testis and ovary development, analyzed the evolution of the gonadosomatic index (GSI) in both sexes throughout the year, and estimated fecundity and length at 50% maturity for females. Pinguipes brasilianus is a multiple spawner with indeterminate annual fecundity and an extended reproductive season, encompassing austral spring and summer. Low GSI values in males (monthly means ranged between 0.11% and 0.75%) and low relative fecundity in female fish (between 2 and 44 oocytes/g) are consistent with a need of close proximity between male and female during oocyte fertilization, sexual courtship and with spawning in pairs and/or within reef crevices. The estimated length at 50% maturity (± SD) for females was 15.22 ± 0.43 cm total length. Although P. brasilianus shares the main reproductive features of its congeneric species Pinguipes chilensis , male GSI and female length at 50% maturity in P. brasilianus were markedly lower than those reported for P. chilensis , while relative and batch fecundity were greater in fish of the same size.

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 Ovary maturation stages histology and follicles diameter of Melanotaenia boesemani rainbowfish ovary from district of North Ayamaru, Maybrat Regency, west Papua

2015 ◽  
Vol 32 (03) ◽  
pp. 157-164
Author(s):  
I. Hismayasari ◽  
S. Rahayu ◽  
A. Marhendra
Keyword(s):  
Paraffin Section ◽  
Mature Oocyte ◽  
Oocyte Development ◽  
Diameter Distribution ◽  
Maturation Stage ◽  
Multiple Spawner ◽  
West Papua ◽  
Maturation Stages ◽  
Hematoxylin Eosin ◽  
Ovary Maturation

Abstract Introduction: This research aim is to described ovary maturation stages histologically related with oocytes development in ovary of boesemani rainbowfish M. boesemani from North Ayamaru district, Maybrat Regency, West Papua. Materials and Methods: A histologycal analysis of ovari maturation stage (OMS) of the Boesemani rainbowfish Melanotaenia boesemani performed on 93 ovaries. Fresh ovaries were fixed in 10% Neutral Buffered Formalin (NBF) and embedded in paraffin. Section of about 5-6 pm thickness were cut and stained with Hematoxylin eosin (HE). Results: Histologycal analysis of rainbowfish M. boesemani ovaries based on oocyte development consist of 8 oocyte types not included atresia follicle i.e oogonia, early perinuclear oocyte, late perinuclear oocyte, cortical alveoli oocyte, early vitelogenic oocyte, mid-vitelogenic oocyte, late vitelogenic oocyte, and mature oocyte. The chorion and follicle layers begins to form at OMS II, keeps growing at OMS III, and was apparent at OMS IV. The chorion and follicle layers at OMS V ovaries were disintegrated. Conclusion: Based on ovary histology, oocyte proportion, and follicles diameter distribution can be concluded that the rainbowish M. boesemani classiied as multiple spawner.

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