Impact of Temperature Variations on Breeding Behavior of Cirrhinus mrigala during Induced Spawning

Khan, Saeed Akram

doi:10.17582/journal.pjz/20200510140530

Cited by 2 publications

(4 citation statements)

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“…Temperature has great impact on fish fertilization rate. Increase in temperature up to optimum boosting the fertilization rate (Iqbal et al, 2021). The present study also reveals the comparison of Rohu (Labeo rohita) and Mrigala (Cirrhinus mrigala) fertilization rate.…”

Section: Impact Of Temperature Variation On Fertilization Ratesupporting

confidence: 56%

“…Ovulation rate, spawning response, fertilization and hatching rate were directly influenced by temperature (Iqbal et al, 2021). It was observed that increased in temperature decreased the latency period in fishes (Phelps et al, 2007).…”

Section: Effects Of Temperature Variation On Spawning Response Timementioning

confidence: 99%

“…Both species showed maximum fertilization rate at high temperature 25.4±0.021ºC, but at low temperature 24.4±0.007ºC both species showed minimum fertilization rate. In India researcher recorded that highest fertilization rate (97.5%) in Mrigala (Cirrhinus mrigala) followed by Rohu (92%) due to influence of temperature range 27-34ºC (Mohapatra et al, 2018) (Iqbal et al, 2021).…”

Section: Impact Of Temperature Variation On Fertilization Ratementioning

confidence: 99%

“…These conditions vary from species to species (Hoffle et al, 2018). The reproductive cycle of fishes is primarily stimulated by water temperature (Iqbal et al, 2021). Indian major carps required water temperature range 21-31 º C for inducing ovulation and hatching (Day, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Degree-hours to spawning response, fertilization rate and hatching of Labeo rohita and Cirrhinus mrigala through induced breeding under hatchery environment.

Azhar¹,

Anjum²,

Akhter³

et al. 2022

J. Zoo Biol.

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Major carp is a group of fish species commonly cultured in Indian Subcontinent. Fish is the major source of protein, omega-3 fatty acids, vitamins and minerals. With the robust increase in human population, the demand of food is also increasing. To overcome the food, demand many food sectors are working in line to cope with the protein requirements management of brood stock and successful breeding is also very important. Estimation of degree-hours for the spawning response, hatching of brood stock and their fertilization rate, hatching rate of fish eggs is one of the major aspects of hatchery management. Degree-hours is a standard unit that is used to measure the heat requirement for spawning and hatching while data is scarce for many species. The current study was designed to investigate the degree-hours to spawning and hatching for major carps i.e., Rohu (Labeo rohita) and Mrigala (Cirrhinus mrigala) during May to August 2022 at Punjab Fish Seed Hatchery, Rawal Town Islamabad, Pakistan. Two triplets (one male and two females) of each species were selected for induced breeding. Ovaprim was administrated at the rate of 0.5ml/kg for female and 0.2ml/kg for male to stimulate ovulation and spermitation respectively. Both species showed ovulation rate (100%). Spawning was occurred after 9.35±0.4299 hours in Rohu and in Mrigala 10.18±0.4393 hours at average water temperature of 26.3±0.575. Degree-hours to spawning in Rohu and Mrigala were calculated as 248.6±9.35 and 264.6±5.625 respectively. Higher fertilization rate (87.23±2.029%) and hatching rate (84.88±1.7747%) were observed in Mrigala (Cirrhinus mrigala) as compared to Rohu (Labeo rohita) i.e. (85.75±1.856%) and (81.75±1.525%) respectively. Hatching activity proceeded rapidly in Rohu and completed in 741.025±14.532 degree-hours while, in Mrigala it occurred in 778.43±9.1972 degree-hours. This was a first documented report on effect of degree-hours on induced breeding of indigenous carps of Pakistan i.e., Rohu and Mrigala under controlled hatchery environment.

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Section: Impact Of Temperature Variation On Fertilization Ratesupporting

confidence: 56%

Section: Effects Of Temperature Variation On Spawning Response Timementioning

confidence: 99%

Section: Impact Of Temperature Variation On Fertilization Ratementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Degree-hours to spawning response, fertilization rate and hatching of Labeo rohita and Cirrhinus mrigala through induced breeding under hatchery environment.

Azhar¹,

Anjum²,

Akhter³

et al. 2022

J. Zoo Biol.

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Captive Breeding and Early Developmental Dynamics of Cirrhinus mrigala: Implications for Sustainable Seed Production

Khan,

Sherzada,

Ahmad

et al. 2024

Animals

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Cirrhinus mrigala is an important edible fish with a significant aquaculture contribution in Southeast Asian countries. The current study aims to enhance our understanding of the developmental biology of Cirrhinus mrigala, which is crucial for implementing sustainable fish farming practices. To induce spermiation and ovulation in Cirrhinus mrigala brooders, the synthetic hormone Ovaprim® (GnRH + dopamine inhibitor) was administrated as a single injection dose of 0.2 mL/kg to males and 0.4 mL/kg to females. After induction, the fish spawned, and the eggs produced were fertilized artificially and cell division commenced successfully. The characteristics of each larval developmental stage were closely observed and recorded using a time-lapse imaging technique. The fertilized eggs were spherical, demersal, and non-adhesive throughout their incubation period. The spawned eggs ranged in diameter from 2.1 mm to 2.13 mm and possessed circular yolk sacs. The gastrula stage initiated approximately 4 h after fertilization, with 25% of the yolk sphere covered by blastoderm, reaching 75% coverage at the end of the gastrula stage, approximately 6 h post fertilization. Organogenesis was marked by the formation of notochord and the visibility of rudimentary organs such as the heart, eyes, and gills, followed by tail movement, which was observed at the time of hatching. Compared to other cyprinid fishes, C. mrigala exhibited distinct features at certain stages of embryonic development. Blood circulation was observed to start at the onset of hatching. The lengths of the newly hatched larvae ranged from 2.9 to 3.2 mm, smaller than other reports on induced breeding in carps. The findings of the present study provide a detailed reference for the embryonic development of C. mrigala, which will assist its future research endeavors and large-scale seed production for sustainable aquaculture.

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Impact of Temperature Variations on Breeding Behavior of Cirrhinus mrigala during Induced Spawning

Abstract: Authors' Contributions MT conceived the idea, provided guidance for the studies and manuscript write-up. AA performed experimental work. ASH, AN, SF and SS facilitated the conduction of experiments. ARA and MW helped in data analysis and manuscript write-up.

Cited by 2 publications

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Degree-hours to spawning response, fertilization rate and hatching of Labeo rohita and Cirrhinus mrigala through induced breeding under hatchery environment.

Degree-hours to spawning response, fertilization rate and hatching of Labeo rohita and Cirrhinus mrigala through induced breeding under hatchery environment.

Captive Breeding and Early Developmental Dynamics of Cirrhinus mrigala: Implications for Sustainable Seed Production

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