Induced breeding of the riverine catfish &lt;i&gt;Rita rita&lt;/i&gt;

Molla,; Amin, Ruhul; Sarowar, Mohammad Nasif; Muhammadullah, M

doi:10.3329/jbau.v6i2.4835

Cited by 14 publications

(27 citation statements)

References 6 publications

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“…Earlier attempts have been made to study its length-weight (Lal and Dwevedi 1969), age and growth (Devi et al 1990), environmental impact assessment (Mukhopadhyay 1994), morphometric characters (Devi et al 1991), food (Devi et al 1992), maturity and fecundity (Saxena 1972), structure of the skin (Mital 1968) and reproductive biology of R. rita (Amin et al 2008). Recent success in induction of breeding of R. rita was performed by using PG (Mollah et al 2008).…”

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confidence: 99%

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Embryonic and larval development of critically endangered riverine catfish Rita rita

Mollah¹,

Taslima²,

Rashid³

et al. 2011

Eurasia J Biosci

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The present study was carried out to investigate the embryonic and larval development of freshwater catfish Rita rita. The mature eggs and sperms were collected by using artificial insemination technique and fertilized eggs were incubated in mini circular hatchery with provision of continuous water supply. The fertilized eggs were transparent, demarsal, spherical, non-adhesive and brownish in colour with a diameter ranging between 1.3 to 1.6 mm. First cleavage occurred within 25-30 min post-fertilization at temperature of 28±1°C. Hatching started 22 h post-fertilization and completed within 24 h at the same temperature range. Newly hatched larvae were 2.0 mm in length devoid of mouth and pigmentation and started feeding within 48-60 h post-hatching. To date, this is the first time the early embryonic and larval development of freshwater catfish R. rita is described. Thus the findings of the present study provide valuable information that may help establishing the large scale seed production technique of Rita.

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confidence: 99%

“…The collected mature broods of Rita rita (Hamilton, 1822) were induced to spawn through hypophysation previously described by Mollah et al (2008). After that, the eggs were fertilized by the normal milt.…”

mentioning

confidence: 99%

Embryonic and larval development of critically endangered riverine catfish Rita rita

Mollah¹,

Taslima²,

Rashid³

et al. 2011

Eurasia J Biosci

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“…Two breeding trials of M. armatus were performed using PG extract in the present study. Earlier artificial breeding trials have been conducted with a number of species for standardizing the dose of PG for achieving satisfactory rate of ovulation, but an ambiguity remains among the doses used by the scientists (Khan, 1972;Thakur and Das, 1974;Khan and Mollah, 2004;Mollah et al, 2008;Taslima and Mollah, 2012). For induced breeding of M. armatus, selection of suitable inducing agents and optimization of doses are felt essential but much information on these aspects are not available in Bangladesh or elsewhere in the world except the attempt was taken by Mollah et al (2013) to breed the fish using different doses of PG but it was ended without any success.…”

Section: Discussionmentioning

confidence: 99%

Induced breeding of endangered spiny eel (Mastacembelus armatus) using PG extract

2018

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Mastacembelus armatus is an important freshwater spiny eel of Bangladesh. The experiment was initiated to establish an induced breeding technique of the species with two induced breeding trials. In trial I, four different doses viz. 20, 40, 60 and 80mg PGkg-1 body weight of the fish were used to standardize the PG dose to ovulate the female M. armatus, and in trial II, the best dose identified in trial I was injected to fish once (whole dose) or twice with divided dose of PG at the rate of 30% and 70% at 6h interval to observe the effect of the mode of hormonal injection. Among the four doses applied in trial I, best result was obtained from 40mg PGkg-1 body weight in respect of ovulation rate (100%) of females and fertilization (93.00±2.00%) and hatching rates (58.30±3.50%) of eggs. In trial II, the females treated once (with the whole dose) or twice with divided dose of PG equally responded and no significant difference (p>0.05) was observed between the modes of hormone injection in respect of ovulation rate of females and fertilization and hatching rates of eggs. As M. armatus is considered as endangered fish, this induced breeding technique will help to conserve the fish as well as to produce seed in commercial hatcheries. Progressive Agriculture 29 (3): 267-275, 2018

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“…Considering its high market demand, the riverine catfish R. rita could be a prospective candidate for aquaculture in Bangladesh and there is an urgent need to establish domestication, cultivation and artificial propagation of the species, to augment the natural population, meet the high demand and help in conservation of the species. Some attempts have been taken to develop culture techniques for the fish, such as induced breeding (Mollah et al, 2008), induced breeding and larval rearing (Taslima and Mollah, 2012) and effect of different feeds on growth and survival (Amin et al, 2010). But the influence of stocking density on the production of this important fish is yet to be elucidated.…”

Section: Introductionmentioning

confidence: 99%

Influence of stocking density on the culture potential of endangered riverine catfish Rita rita (Hamilton, 1822) in raceway

Ali¹,

Sarder²,

Rahman³

et al. 2018

Indian J. Fish.

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Endangered catfish Rita rita were reared in a cemented raceway to observe the culture potentiality at three different stocking densities (4, 8 and 16 juveniles/m 3) under the three treatments (T1, T2 and T3, respectively) with three replications each. The mean initial length and weight of Rita juveniles were 20.15±1.51 cm and 100.26±6.57 g, respectively. The fish were reared by providing clean poultry viscera (containing 48.56% crude protein) at 3% of biomass once a day. The water quality parameters were measured daily and found them within suitable ranges. The growth parameters such as final mean total length, relative length gain, mean body weight, relative weight gain, SGR and condition factor were significantly (p<0.5) higher in T1 compared to those of T2 and T3. The survival rate was 100% in all the treatments, and the fish production was significantly (p<0.5) higher in T3 (8.38±0.04 kg/m 3 and 8380.40±4.05 kg/ha) than those of T2 (4.49±0.03 kg/m 3 and 4493.00±3.22 kg/ha) and T1 (2.36±0.02 kg/m 3 and 2362.00±2.00 kg/ha). Though the growth performance of R. rita was significantly influenced by the lowest stocking density but the production findings suggest that this species can be reared at the minimum density of 16 juveniles/m 3 in cemented raceway with suitable environment and adequate supplemental feed.

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Induced breeding of the riverine catfish <i>Rita rita</i>

Cited by 14 publications

References 6 publications

Embryonic and larval development of critically endangered riverine catfish Rita rita

Embryonic and larval development of critically endangered riverine catfish Rita rita

Induced breeding of endangered spiny eel (Mastacembelus armatus) using PG extract

Influence of stocking density on the culture potential of endangered riverine catfish Rita rita (Hamilton, 1822) in raceway

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