Breeding of Climbing Perch (Anabas testudineus Bloch, 1792) Induced with Ovatide

Climbing perch (Anabas testudineus) is a much demanded fish in the northeastern part of India, yet the absence of a standardized method to induce breeding remains a major constraint in the development of aquaculture of this species. In this study, breeding was induced using 0.1, 0.2, or 0.3 ml/kg body weight of the synthetic hormone Ovatide and compared with fish injected with 30 mg carp pituitary extract (CPE) per kg body weight or 0.5 ml saline (control). Male and female brooders were injected once with an identical dose and left to spawn in tubs at a ratio of 2:1. No breeding occurred in the saline-injected control fish. There was partial spawning in the 0.1 and 0.2 Ovatide treatments and complete spawning in fish injected with 0.3 Ovatide. Spawning and number of eggs in fish injected with 0.3 Ovatide did not statistically differ from results in fish injected with CPE (p≥0.05). The present experiment suggests that Ovatide at 0.3 ml/kg body weight is optimal for seed production of climbing perch held in captivity and can be used for species restoration

Aquaculture

Not AvailableThe present study describes the viable and efficient hatchery seed production technique to maximize spotted scat (Scatophagus argus) juvenile production in captivity during the breeding season. Broodstock fish maintained in the earthen pond of hatchery were selected according to varying mean oocyte diameter (MOD) ranging from 351 to 400 (T1), 401?450 (T2), 451?500 (T3), and > 500 ?m (T4) according to natural vitellogenesis progression. Breeding pairs were formed as two males: one female. Females (n = 24) were induced with a double dose of hCG (2000 IU kg?1 body weight day?1) and a single dose of LHRHa (400 ?g kg?1 body weight) each at 24 h interval, whereas males (n = 48) received a single dose of LHRHa (200 ?g kg?1 body weight). Females in T4 were spawned through dry stripping earliest at 30 h post hormone induction, whereas females of the T1 group spawned last at 33 h. The largest (P 500 ?m diameter for artificial fertilization. Seed production can be optimized by adopting a stocking density of 4?6 larvae L?1 in the indoor larval rearing and 3000 fry m?3 in outdoor hapa based nursery systems

Aquaculture

Not AvailableThe present study describes the viable and efficient hatchery seed production technique to maximize spotted scat (Scatophagus argus) juvenile production in captivity during the breeding season. Broodstock fish maintained in the earthen pond of hatchery were selected according to varying mean oocyte diameter (MOD) ranging from 351 to 400 (T1), 401?450 (T2), 451?500 (T3), and > 500 ?m (T4) according to natural vitellogenesis progression. Breeding pairs were formed as two males: one female. Females (n = 24) were induced with a double dose of hCG (2000 IU kg?1 body weight day?1) and a single dose of LHRHa (400 ?g kg?1 body weight) each at 24 h interval, whereas males (n = 48) received a single dose of LHRHa (200 ?g kg?1 body weight). Females in T4 were spawned through dry stripping earliest at 30 h post hormone induction, whereas females of the T1 group spawned last at 33 h. The largest (P 500 ?m diameter for artificial fertilization. Seed production can be optimized by adopting a stocking density of 4?6 larvae L?1 in the indoor larval rearing and 3000 fry m?3 in outdoor hapa based nursery systems

Aquaculture

Not AvailableThe present study describes the viable and efficient hatchery seed production technique to maximize spotted scat (Scatophagus argus) juvenile production in captivity during the breeding season. Broodstock fish maintained in the earthen pond of hatchery were selected according to varying mean oocyte diameter (MOD) ranging from 351 to 400 (T1), 401?450 (T2), 451?500 (T3), and > 500 ?m (T4) according to natural vitellogenesis progression. Breeding pairs were formed as two males: one female. Females (n = 24) were induced with a double dose of hCG (2000 IU kg?1 body weight day?1) and a single dose of LHRHa (400 ?g kg?1 body weight) each at 24 h interval, whereas males (n = 48) received a single dose of LHRHa (200 ?g kg?1 body weight). Females in T4 were spawned through dry stripping earliest at 30 h post hormone induction, whereas females of the T1 group spawned last at 33 h. The largest (P 500 ?m diameter for artificial fertilization. Seed production can be optimized by adopting a stocking density of 4?6 larvae L?1 in the indoor larval rearing and 3000 fry m?3 in outdoor hapa based nursery systems

Aquaculture

Not AvailableThe present study describes the viable and efficient hatchery seed production technique to maximize spotted scat (Scatophagus argus) juvenile production in captivity during the breeding season. Broodstock fish maintained in the earthen pond of hatchery were selected according to varying mean oocyte diameter (MOD) ranging from 351 to 400 (T1), 401?450 (T2), 451?500 (T3), and > 500 ?m (T4) according to natural vitellogenesis progression. Breeding pairs were formed as two males: one female. Females (n = 24) were induced with a double dose of hCG (2000 IU kg?1 body weight day?1) and a single dose of LHRHa (400 ?g kg?1 body weight) each at 24 h interval, whereas males (n = 48) received a single dose of LHRHa (200 ?g kg?1 body weight). Females in T4 were spawned through dry stripping earliest at 30 h post hormone induction, whereas females of the T1 group spawned last at 33 h. The largest (P 500 ?m diameter for artificial fertilization. Seed production can be optimized by adopting a stocking density of 4?6 larvae L?1 in the indoor larval rearing and 3000 fry m?3 in outdoor hapa based nursery systems

Reverse Tradition: Nature’s Devoted Dads

42-43It is the father who takes care of the young ones in some animal species

Breeding of Climbing Perch (Anabas testudineus Bloch, 1792) Induced with Ovatide

Abstract Climbing perch (Anabas testudineus) is a much demanded fish in the northeastern part of India, yet the absence of a standardized method to induce breeding remains a major constraint in the development of aquaculture of this species. In this study, breeding was induced using 0.1, 0.2, or 0.3 ml/kg body weight of the synthetic hormone Ovatide and compared with fish injected with 30 mg carp pituitary extract (CPE) per kg body weight or 0.5 ml saline (control). Male and female brooders were injected once with an identical dose and left to spawn in tubs at a ratio of 2:1. No breeding occurred in the saline-injected control fish. There was partial spawning in the 0.1 and 0.2 Ovatide treatments and complete spawning in fish injected with 0.3 Ovatide. Spawning and number of eggs in fish injected with 0.3 Ovatide did not statistically differ from results in fish injected with CPE (p≥0.05). The present experiment suggests that Ovatide at 0.3 ml/kg body weight is optimal for seed production of climbing perch held in captivity and can be used for species restoration. The IJA appears exclusively as a peer-reviewed on-line open-access journal at http://www.siamb.org.il. To read papers free of charge, please register online at registration form. Sale of IJA papers is strictly forbidden. 2 Singh et al

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Not AvailableThe Brackishwater aquaculture sector in India has for several decades been dominated by a single species or multiple species of shrimps. Though several options for farming finfish varieties had been made available, farmers preferred to culture shrimp for its ease in culture, marketing and profitability. With increasing global competition in seafood production and supply, causing unstable markets and unpredictable prices, as well as new and emerging diseases causing widespread production issues in the sector, it is only imperative that, for its long term sustenance, the sector seriously consider species diversification and adopt innovative practices and technologies to farm multiple brackishwater species along the Indian coastal areasNot Availabl

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Not AvailableFour feeding frequencies of one (T1), two (T2), three (T3) and four (T4) times a day were evaluated as treatments on Mystus gulio in triplicate net cages (2×1×1 m) for a period of 60 days. Hatchery produced twelve-day old M. gulio fry (0.02 g/ 12 mm) stocked at 300 number/ net cage were fed with a CIBA formulated diet (Crude protein 30%) at 15-5% of the biomass daily. Fry attained significantly higher growth of 1.30±0.32 g at 3 times feeding a day compared to other groups (P0.05) between T3 and T4. Moreover, higher survival in 3 and 4 times feeding differed significantly from that of 1 and 2 times feeding a day (P<0.05). No significant differences were recorded among treatments for feed conversion ratio and coefficient of variation in the harvest weight, which ranged 2.03-2.94 and 0.184-0.374, respectively. Similarly, whole body composition of harvested fry revealed no variation in parameters among treatments. Therefore, a feeding frequency of 3 times daily is suggested for nursery rearing of M. gulio in net cage system.Not Availabl

Aquaculture

Not AvailableAs per attachmen