Synergistic approach in carp polyculture with grass carp as a major component

Tripathi, S.D.; Mishra, Debendra Nath

doi:10.1016/0044-8486(86)90268-1

Cited by 8 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Earlier trials in the same system by Hossain (1995) found similar responses by the three species to fertilization, as reported in the current study.Young, non-stunted mrigal (M3) in the present study performed relatively better than rohu (R3) in ponds receiving both high and low levels of inorganic fertilization. Similar ¢ndings were also reported by Tripathi & Mishra (1986). Laha, Biswas & Mitra (1990) reported contradictory results, probably because of di¡erences in length of growing period (10 months) and type of fertilizer used.…”

Section: Discussionsupporting

confidence: 83%

Nursing duration and pond fertilization level affect polycultures of Indian major carp (rohu Labeo rohita and mrigal Cirrhina mrigala ) with monosex Nile tilapia Oreochromis niloticus

Hossain¹,

Little²,

Bhujel³

2003

Aquaculture Research

View full text Add to dashboard Cite

This study investigated the effects of nursing duration on the subsequent performance of rohu (R) Labeo rohita and mrigal (M) Cirrhina mrigala in polyculture with monosex male Nile tilapia (T) Oreochromis niloticus at four levels of pond fertilization. Nile tilapia, rohu and mrigal were stocked at a ratio of 4:1:1 in a 90‐day trial based on 40 20‐m2 pens fixed in four 400‐m2 earthen ponds. Growth of carp fingerlings during prolonged nursing (5 or 12 months) was stunted compared with fish nursed over a conventional duration of 3 months (3) but showed superior growth subsequently. Mean daily weight gain of stunted rohu (12) ranged from 2.2 to 2.8 g per fish day−1 compared with 1.1–1.6 g per fish day−1 for younger fish (3). The comparable ranges for mrigal were 1.9–2.8 and 1.4–2.1 g per fish day−1. Growth of Nile tilapia was inversely related to duration of carp nursing at the four levels of fertilization. Nile tilapia showed more response to increasing levels of fertilizer input (Y=−1.421+1.716X, where Y is the daily weight gain of Nile tilapia and X is the fertilizer level, r2=0.98, P<0.01, n=12). At a high level of fertilization (3.0 kg N:1.5 kg P ha−1 day−1), performance of stunted fingerlings (5 and 12) of both rohu and mrigal was similar (range 2.3–2.8 g per fish day−1, P>0.05), but younger mrigal (M3) grew faster than rohu (2.1 g per fish day−1 and 1.6 g per fish day−1 respectively). Older rohu (12) appeared to perform particularly well, and Nile tilapia poorly at the lowest level of fertilization (1.5 N:0.75 kg P ha−1 day−1), suggesting the impact of age of seed on competition within polycultures. The net fish yield (NFY) of tilapia was not affected significantly (P>0.05) by differential stocking age of carps; therefore, combined NFY of the three experimental fish species was not affected by the age of carp, as tilapia was the dominant species in polyculture. The highest combined NFY of all species in the most intensively fertilized pond (3.0 N:1.5 P kg ha−1 day−1) was calculated at 4.06±0.08 g·m−2 day−1, which was significantly higher (P<0.001) than the yield (1.82±0.12 g·m−2 day−1) from the pond with the lowest fertilization. At the highest fertilizer level, tilapia, rohu and mrigal contributed 72%, 14% and 14%, respectively, to the NFY, whereas the ratio was 60%, 20% and 20% at the lowest fertilization level. The study indicated that yields from tilapia in polyculture with the two carp species in more eutrophic water can be optimized if advanced nursing of carps is practised. Moreover, higher inputs of inorganic fertilizer and advanced nursing of carp are economically attractive under Bangladeshi conditions. Advanced nursing of rohu also improves its performance in more extensive systems when tilapia densities are high.

show abstract

Section: Discussionsupporting

confidence: 83%

Nursing duration and pond fertilization level affect polycultures of Indian major carp (rohu Labeo rohita and mrigal Cirrhina mrigala ) with monosex Nile tilapia Oreochromis niloticus

Hossain¹,

Little²,

Bhujel³

2003

Aquaculture Research

View full text Add to dashboard Cite

show abstract

“…Under a new system of carp culture known as weed-based culture, yields of over 4,000 kg/ha/year have been achieved when fish are stocked at a density of 4,000 fingerlings/ha with as much as 50% grass carp and the other 50% comprising five other carp species. No fertilizer was used except aquatic/terrestrial vegetation applied for grass carp (Tripathi and Mishra 1986). Under similar experimental trials carried out with grass carp as the major species, Aravindakshan et al (1999) recorded production of 2,407-2,517 kg/ha/ year.…”

Section: Carp Culture In Static Ponds/tanks Stocking Density Stockinmentioning

confidence: 99%

Grow-Out Production of Carps in India

Ayyappan

Jena

2003

Journal of Applied Aquaculture

View full text Add to dashboard Cite

Asian aquaculture has been contributing in great measure to the global fish basket. The Indian subcontinent, with a rich biodiversity of fish species, has emerged as an important aquaculture country, particularly in the freshwater environment. Carps form the mainstay of culture practices in the country, supported by a strong traditional knowledge base and scientific input in various aspects of biology, environment, nutrition, and health management. New species and culture systems, integration with other farming systems, use of organic material as nutrient inputs, and depuration measures in waste-fed culture systems are being considered for enhancing aquaculture productivity. This article presents the status of grow-out production of carps in India and traces the growth of the practices over the decades as well as the potential of the sector. [Article copies available for a fee from The Haworth Document Delivery Service: 1

show abstract

“…As only a few households kept pigs, pig manure was applied in small quantities during trials in the research area, with organic fertilization performed through the application of cow and buffalo manure and through the stocking of grass carp (stocked at a density of 10-20 % of the carp polyculture). Several researchers' studies reported that stocking grass carp had a significant impact on the fertility of ponds by enhancing decomposition rates and directly releasing nutrients from the undigested leaf parts used as feed (Tripathi and Mishra 1986;Kumar et al 2005b;Pomeroy et al 2000). Urea and single super-phosphate, which are available in the region and used by farmers in the upland fields, were also used in these studies, with organic and chemical fertilizers applied at an N/P ratio of about 3:1.…”

Section: Implementation Of the Modified Pond Management Systemmentioning

confidence: 99%

“…Under the traditional carp polyculture system of northern Vietnam, grass carp has been reported to be the main species (Steinbronn 2009;Kumar et al 2005a, b;Tripathi and Mishra 1986); grown to augment the internal nutrient recycling processes of the ponds, and can be raised cost efficiently with the use of on-farm resources (Kumar et al 2005b;Pomeroy et al 2000).…”

Section: Implementation Of the Modified Pond Management Systemmentioning

confidence: 99%