scholarly journals Observations on impact of stunting on breeding performance of farmed rohu Labeo rohita (Hamilton, 1822)

2021 ◽  
Vol 68 (1) ◽  
Author(s):  
P. P. Suresh Babu ◽  
P. Srinivasa Rao ◽  
J. Krishna Prasad ◽  
Rupam Sharma ◽  
A. M. Babitha Rani ◽  
...  
Keyword(s):  
Detrimental Effect ◽  
Labeo Rohita ◽  
Gonadosomatic Index ◽  
Growth Enhancement ◽  
Breeding Performance ◽  
Relative Fecundity ◽  
Absolute Fecundity ◽  
Development Period ◽  
Hatching Percentage ◽  
Ovary Growth

Breeding performance of stunted rohu Labeo rohita (Hamilton, 1822) was compared with normally reared rohu. Randomly selected stunted and normal fishes were tagged and reared together in a single earthen pond for broodstock development. Both groups exhibited growth enhancement during the broodstock development period, though normal fishes were found larger in size than the stunted fishes, after the rearing period. Gonadosomatic Index (GSI) of female fishes indicated a similar trend of ovary growth in both the groups. Breeding performances of the broodstocks were evaluated by induced breeding trials. Parameters such as absolute fecundity, relative fecundity, number of spawns produced and hatching percentage were significantly higher (p<0.05) (almost double) in normal fishes than the stunted fishes. The present results indicate that the stunting process (6 months) is having detrimental effect on the breeding performance of rohu and thus stunted fishes are not ideal for broodstock development.

scholarly journals REPRODUCTIVE BIOLOGY OF THE SPINY EEL MACROGNATHUS PANCALUS HAMILTON, 1822 FROM UPPER ASSAM, INDIA

2020 ◽  
Vol 67 (1) ◽  
Author(s):  
S.K. Abujam ◽  
S.P. Biswas
Keyword(s):  
Sexual Dimorphism ◽  
Sex Ratio ◽  
Reproductive Biology ◽  
Body Shape ◽  
Gonadosomatic Index ◽  
Percentage Distribution ◽  
Relative Fecundity ◽  
Absolute Fecundity ◽  
Maturity Stages ◽  
Fish Samples

Reproductive biology of spiny eel Macrognathus pancalus Hamilton, 1822 was studied from the waterbodies of upper Assam, India. Sexual dimorphism was easily distinguished based on their body shape and colouration. Among the 467 fish samples examined, 312 males and 155 females were identified and the Male:Female (M:F) ratio ranged from 1:0.08 in November to 1:2.17 in June with overall sex ratio of 1:0.5. Five maturity stages were identified in a year and percentage distribution of each stage was calculated. The gonadosomatic index (GSI) ranged from 0.42 to 8.08 for females and from 0.33 to 1.25 for males. The length at 50% of the fishes attained maturity (Lm50) was 9-12 cm in males and at 12-15 cm in females, indicating males matures at moderately smaller size than their female counterparts. Ova diameter ranged from 0.3 to 1.3 mm; absolute fecundity ranged from 765.48 to 1691.96 and relative fecundity from 57.9 to 152.17. M. pancalus spawned once in a year with peak spawning between June and August.

scholarly journals Comparative Studies on Gonad Development, Fecundity and Oocyte Maturation of Spotted Snakehead, Channa punctatus (Bloch, 1793) in Different Water Bodies

2020 ◽  
pp. 75-87
Author(s):  
Md. Almamun Farid ◽  
M. Anisur Rahman ◽  
Shammi Aktar ◽  
Moumita Choudhury ◽  
Syeda Maksuda Yeasmin ◽  
...  
Keyword(s):  
Oocyte Maturation ◽  
Captive Breeding ◽  
Gonadosomatic Index ◽  
Species Conservation ◽  
Gonad Development ◽  
Water Bodies ◽  
Channa Punctatus ◽  
Relative Fecundity ◽  
Absolute Fecundity ◽  
Production Techniques

The present study was carried out to compare gonad development, oocyte maturation and fecundity of the spotted snakehead (Channa punctatus) fish during January to November 2015 in different water bodies (such as pond, Joghati baor and Bhairab river) in Jashore, Bangladesh. Mean GSI (gonadosomatic index) values of the female C. punctatus during January, March, May, July, September and November were significantly highest in pond, followed by those in Joghati baor and the lowest in Bhairab river. Absolute fecundity during the month of July in pond, baor and river was 30,006±2,027, 23,629±2,356 and 16,659±2,486, respectively, and the relative fecundity was 5064±183, 4865±106 and 4641±138 eggs, respectively. Mean ova diameter in pond, baor and river in March was 0.25±0.04 mm, 0.16±0.02 mm and 0.21±0.03 mm; in May was 0.36±0.03 mm, 0.29±0.03 mm and 0.23±0.04 mm; in July was 1.06±0.06 mm, 0.95±0.05 mm and 0.87±0.03 mm; and in September was 0.84±0.04 mm, 0.82±0.03 mm and 0.72±0.05 mm, respectively. Mean GSI values of the male C. punctatus during January, March, May, July, September and November were significantly higher in pond than those in baor and river, respectively. The mean highest GSI for female was found to be 6.06±0.11 in pond during the month of July, while the lowest GSI of 0.30±0.08 was in Bhairab river during November. The highest GSI value for male was obtained to be 0.70±0.16 in pond during the month of July, while the lowest GSI of 0.12±0.03 was found in Bhairab river during January. However, significant differences (P<0.05) were found in GSI values, absolute fecundity, relative fecundity and ova diameter of C. punctatus during different months in pond, Joghati baor and Bhairab river. The findings from the present research would immensely be useful for captive breeding and seed production techniques of C. punctatus for aquaculture production, sustainable management and species conservation.

scholarly journals Fecundity and Gonadosomatic Index of Sucker Throat Catfish, Pseudecheneis sulcata (McClelland, 1842) from the Snow-fed Tamor River in Eastern Nepal

2021 ◽  
Vol 11 (2) ◽  
pp. 1-9
Author(s):  
Jash Hang Limbu ◽  
Dipak Rajbanshi ◽  
Prakash Kumar ◽  
Bharat Raj Subba
Keyword(s):  
Body Weight ◽  
Reproductive Biology ◽  
Gonadosomatic Index ◽  
Spawning Season ◽  
Stream Fish ◽  
Female Fish ◽  
Ovary Weight ◽  
Relative Fecundity ◽  
Absolute Fecundity ◽  
Total Length

In comparison to other nations, the Nepalese information on the reproductive biology of hill-stream fish is limited. So, the purpose of the present study was to provide information related to reproductive biology of a hill-stream sucker throat catfish Pseudecheneis sulcata from the snow-fed Tamor River, Nepal. The study was carried out from June 2018 to May 2019.  A total of 57 female fish was collected. The fecundity of 22 females was assessed, while the gonadosomatic index was determined using all the collected samples. The absolute fecundity ranged from 2,316 to 7,597 eggs, with an average of 3,660 ± 210. This range of absolute fecundity indicates that Pseudecheneis sulcata is a moderately fecund fish when compared to certain low fecund species and some exceptionally fecund fish with tens of thousands of eggs. Relative fecundity ranged from 65.47 to 129.11 with a mean of 88.98 ± 4.35. The present study demonstrated that absolute fecundity was moderately correlated with total length (r = 0.45) and strongly linked with body weight (r = 0.78), and ovary weight (r = 0.80). Mean gonadosomatic index (GSI) was recorded the highest in January (15.7 ± 1.22%), and showed a decrease in the subsequent month of February (10.3 ± 0.75%), March (6.25 ± 0.28%) and April (1.66 ± 0.40%). The trends of GSI might have indicated that the sucker throat catfish was a batch spawner, with spawning season occuring between January and March.

scholarly journals Effect of feeding management of broodstock on breeding performance of bata (Labeo bata)

2016 ◽  
Vol 1 (3) ◽  
pp. 553-568 ◽  
Author(s):  
Md Habibur Rahman ◽  
Md Anisur Rahman ◽  
Md Mer Mosharraf Hossain ◽  
Syeda Maksuda Yeasmin ◽  
Abdulla Al Asif
Keyword(s):  
Methylene Blue ◽  
Survival Rate ◽  
Lipid Level ◽  
Gonadosomatic Index ◽  
Dietary Factors ◽  
Hatching Rate ◽  
Breeding Performance ◽  
Fish Hatchery ◽  
Labeo Bata ◽  
Significant Difference

Labeo bata is one of the important minor carps in Bangladesh with great demand as good table fish. The study was conducted to observe the breeding performance at different management practices in Mafatema, Rupali, Modhumoti and Anan fish hatchery and disinfection treatments of water, eggs and fry in Jessore, Bangladesh during 10 March 2014 to 15 May 2015. An improvement in broodstock nutrition and feeding has been shown to greatly improve seed production. Protein and lipid percentage of broodstock diet have been identified as major dietary factors. Protein level was 24.77%, 23.47%, 18.08%, 17.78% and lipid level was 11.07%, 9.50%, 7.74%, 8.14% in Mafatema, Rupali, Modhumoti and Anan fish hatchery respectively. Three concentrations of four chemical-formalin (10, 20, 30 mg/L), malachite green (1, 3, 5 mg/L), NaCl (1, 2, 3 g/L) and methylene blue ( 1, 3, 5 mg/L) treatment regimes and a control were compared for efficacy in treating L. bata eggs to prevent fungus and bacterial infection and improve hatch and survival rate of fry. Highest correlation value between absolute fecundity and body weight (r=.938, p<.05) and total length (r=.891, p<.05) and gonadosomatic index (26.2%) were found in Mafatema fish hatchery among four experimental hatcheries at 24.77% protein and 11.07% lipid level. Better fertilization rate (84.2±5.17%) and hatching rate (82.0±4.30%) were found in Mafatema and Rupali fish hatchery respectively that has significant difference (P<0.05) from that of Modhumoti and Anan fish hatchery at higher protein and lipid level. Lowest deformity rate (6.05+2.65) was observed in Mafatema fish hatchery that was significantly different (P<0.05) from that of Modhumoti fish hatchery. In case of disinfection treatment, methylene blue at 1mg/L bath treatment daily for 4 days showed significantly higher hatching rate (92.33±3.51%) and survival rate (94.33±4.73%).Asian J. Med. Biol. Res. December 2015, 1(3): 553-568

scholarly journals Reproductive biology and development of sexually dimorphic structures in Aphyocharax anisitsi (Ostariophysi: Characidae)

2005 ◽  
Vol 3 (3) ◽  
pp. 433-438 ◽  
Author(s):  
Taís K. Gonçalves ◽  
Marco A. Azevedo ◽  
Luiz R. Malabarba ◽  
Clarice B. Fialho
Keyword(s):  
Body Weight ◽  
Gonadosomatic Index ◽  
Total Body Weight ◽  
Reproductive Period ◽  
Day Length ◽  
Positive Correlation ◽  
Young Males ◽  
Absolute Fecundity ◽  
Fin Rays ◽  
Total Body

The reproductive period of Aphyocharax anisitsi is described through the analysis of specimens collected monthly from April 2001 to March 2002 in the arroio do Salso (3022'27"S, 5502'06"W), Rosário do Sul, Rio Grande do Sul, Brazil. The monthly variation of the Gonadosomatic Index mean (GSI) of both males and females allowed the recognition of a defined seasonal reproductive period occurring between September and February, showing a positive correlation with temperature and day-length. Absolute fecundity was 344.8 oocytes and relative fecundity 0.68 oocytes per mg of body weight. Absolute fecundity was correlated with standard length and total body weight. It was possible to identify two categories of males through the analysis of the number of rays bearing hooks on the anal fin: those with few or no rays bearing hooks identified as young males hatched in the last reproductive season, and those with a higher number of anal-fin rays bearing hooks identified as males that had already reproduced once or that are maturing and participating in their first reproductive period. Once developed, anal-fin rays are maintained permanently. A positive correlation was found between the GSI of maturing and mature males and the number of anal-fin rays bearing hooks from August to January. All specimens bearing gill glands were mature or undergoing maturation, and the frequency of occurrence of the gill glands increased with a rise of GSI.

Some aspects of the reproductive physiology of the Flathead grey mullet Mugil cephalus (Linnaeus, 1758) in Benghazi coast, eastern Libya.

2016 ◽  
Vol 5 (04) ◽  
pp. 4996
Author(s):  
Mohammad El-Mor ◽  
Souad A. M. Moftah ◽  
Yousef K. A. Abdalafid* ◽  
Bulkasim M. Abdulnabi
Keyword(s):  
Sex Ratio ◽  
Mediterranean Sea ◽  
Breeding Season ◽  
Reproductive Physiology ◽  
Mugil Cephalus ◽  
Grey Mullet ◽  
Relative Fecundity ◽  
Absolute Fecundity ◽  
Total Length ◽  
Monthly Variations

The reproductive physiology of 530 specimens of Mugil cephalus (Family: Mugilidae) were collected from catches by gill and trammel nets operating on Benghazi coast on Mediterranean Sea - Libya  was studied, there were monthly variations in sex ratio and a tendency for females (298 fish = 56.2%) than males (232 fish = 43.8%) for the whole population, Overall sex ratio was (1 : 1.28) for males to females respectively, First maturation size was determined for females L50  = 34.1 cm and for males L50  = 32.3 cm, All individuals have definite breeding season which extends from July to October, An increase in Oocyte diameters was evident in July (489 µ ± 5.34), and this increase continued in the following months till October (599 µ ± 11.04), the absolute fecundity ranged from 578981 to 2598022 for fish total length ranging from 19.5 to 47.4 cm, whereas relative fecundity ranged from 29036 to 57352 / cm.

Counterintuitive patterns of spawning stock age structure and recruitment in Lake Erie yellow perch (Perca flavescens)

2015 ◽  
Vol 72 (10) ◽  
pp. 1494-1502 ◽  
Author(s):  
Fan Zhang ◽  
Kevin B. Reid ◽  
Thomas D. Nudds
Keyword(s):  
Maternal Effects ◽  
Age Structure ◽  
Yellow Perch ◽  
Lake Erie ◽  
Perca Flavescens ◽  
Relative Fecundity ◽  
Absolute Fecundity ◽  
Age Related ◽  
Age Dependent ◽  
Spawning Stock

Older spawning fish were often observed to contribute more recruits to harvested stocks than younger fish. However, effects of spawning stock age structure on recruitment were not universally detected. We tested effects of age-dependent absolute fecundity, age-dependent relative fecundity, and age-related maternal effects on recruitment by Lake Erie yellow perch (Perca flavescens). No effects of age-dependent absolute fecundity and age-dependent relative fecundity, nor positive age-related maternal effects, were detected at multidecadal or finer temporal scales of analysis, between 1975 and 2013. Instead, we found evidence of negative age-related maternal effects, of spatially and temporally varying strength; older cohorts in the spawning stock were sometimes associated with lower offspring survival. Such counterintuitive results imply that biotic and abiotic factors, such as interspecific predation, during larval and juvenile life stages might strongly affect recruitment of Lake Erie yellow perch.

scholarly journals Reproductive Aspects of Moenkhausia intermedia Eigenmann, 1908 (Pisces, Characidae) in the Upper Paraná River Basin, Brazil

ISRN Zoology ◽  
2011 ◽  
Vol 2011 ◽  
pp. 1-8
Author(s):  
Armando César Rodrigues Casimiro ◽  
Diego Azevedo Zoccal Garcia ◽  
Fernanda Simões de Almeida ◽  
Mário Luís Orsi
Keyword(s):  
River Basin ◽  
Standard Length ◽  
Reproductive Activity ◽  
Gill Nets ◽  
Relative Fecundity ◽  
Absolute Fecundity ◽  
The Mean ◽  
Upper Paraná River ◽  
Upper Paraná River Basin ◽  
Reproductive Tactic

The aim of this work was to determine the reproductive tactic of the population of Moenkhausia intermedia, inhabiting the Capivara Reservoir, lower Paranapanema River. Four different stretches of the reservoir were selected, and sampling was carried out quarterly, in the period from 2001 to 2004. Fish were captured utilizing gill nets, cast nets, and seine nets. Later, fish were identified and measured and had their sex identified. Here we describe sex proportion, standard length at first maturation (), site and period of spawning, fecundity and type of spawning. The population showed an effective reproductive activity in the area, with the number of females higher than males and corresponding to 6,1 cm and 5,5 cm, respectively. A greater intensity of spawning occurred in the warmest months. Reproductive activity was identified in all stretches studied, and the absolute fecundity average was 9611 oocytes per gonad, and the mean relative fecundity corresponded to 1065 oocytes/grams.

scholarly journals Some Aspects of Reproduction in Long Whiskered Catfish, Sperata aor (Hamilton 1822), from North-East Bangladesh

2021 ◽  
Vol 21 (2) ◽  
pp. 47-54
Author(s):  
Md. Naimuddin Jabed ◽  
Mohammad Amzad Hossain ◽  
Sohel Mian ◽  
Muhammad Anamul Kabir ◽  
Sabuj Kanti Mazumder ◽  
...  
Keyword(s):  
Developmental Stages ◽  
Histological Study ◽  
Gonadosomatic Index ◽  
Morphological Characteristics ◽  
Female Fish ◽  
Histological Changes ◽  
Average Value ◽  
Absolute Fecundity ◽  
North East ◽  
One Year

Different reproductive aspects such as sexual maturity, spawning, gonadosomatic index, fecundity, and histological changes in gonads of captive reared Sperata aor were investigated for a period of one year. Male and female fish were identified by based on morphological characteristics. The spawning season was found to be extended from May-August. Gonadosomatic index reaches maximum in August and lowest in September. Absolute fecundity varied from 59255 to 70586 with an average value of 64920. Absolute fecundity had been reported to be increased with total length, body weight. Histological study of ovary of S. aor indicated the presence of four developmental stages viz, early perinucleolar s oocytes, late perinucleolar oocytes, yolk vesicle stage and yolk granular stage. Findings reveal that, S. aor has group asynchronous manner of ovarian growth and used to spawn numerous times in a year under favorable environmental conditions. The testes histology represents the presence of spermatocyte, spermatid, and spermatozoa. This species builds nests during breeding season and fries are found within the nests.

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