Oxygen uptake through water during early life in Channa punctatus (Bloch) (Pisces; Ophicephaliformes)

Singh, Rajvir; Prasad, M. S.; Mishra, A. P.; Singh, Bal Ram

doi:10.1007/bf00007230

Cited by 15 publications

(8 citation statements)

References 10 publications

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“…In polyculture, snakehead are used to control unwanted small fish through predation (Cruz and Laudencia 1980). In monoculture, this species is culturcd at very high densitics made possible by their air breathing ability which allows this fish to live in waters of low oxygen tension (Singh et al 1986). …”

Section: Introductionmentioning

confidence: 99%

Food selection and growth of young snakehead Channa striatus

Qin

Fast

1997

J Appl Ichthyol

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Food selection and growth of young snakehead Chunnu striutus were studied in the laboratory and in a field trial. In the laboratory, first-feeding snakehead larvae of 6-7 mm total length (TL) with a mouth opening of 0.55 mm sclectcd for Arteniiu nauplii, and against formulated feed. Fish began feeding on kormulated feed at 12mm T L when their mouth width reached 1 .0mni. In both laboratory and field trials, snakehead diets changed as fish size increased. For fish 15-20 mni TL, cladocerans and copepods were 96.5% of their diet. With fish 30-40mm TL, zooplankton consumption was greatly reduced while benthic organism consumption increased. Fish 45-50 mm TL fed exclusively on benthic invertebrates. Diet shift from LOOplankton to benthic invertebrates was not due to reduced zooplankton availability, but was instead related to changes in gill raker structure. Low density of benthic invertebrates in the field trial caused reduced fish growth rates when fish switched diets from zooplankton lo benthos. Our results indicate that snakehead can take Artenki nauplii as a larval starter food, then accept formulated feed at 2 12mm TL. Zooplankton can serve as food for snakehead < 40mm, but formulated feed should be provided for larger fish which are unable to catch zooplankton.

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Section: Introductionmentioning

confidence: 99%

Food selection and growth of young snakehead Channa striatus

Qin

Fast

1997

J Appl Ichthyol

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“…The error introduced in using Eq. (4) at liquid density is difficult to assess but is similar to a mean-field approximation for orientational part of the interaction [20]. Also, in solving Eq.…”

Section: Theory and Working Equationsmentioning

confidence: 96%

“…(3). However, in our present development [18,20] we need to know only g (0) (r 12 , X 12 ). Following Parsons [21], we approximate the reference system pair correlation function as g ð0Þ ðr 12 ; X 12 Þ ¼ g ð0Þ r 12 Dðc r 12 r 12 ; X 12 Þ ¼ g ð0Þ ðr Ã 12 Þ ð 4Þ…”

Section: Theory and Working Equationsmentioning

confidence: 98%

Discotic Nematic-Isotropic Phase Transition Properties for a Disc-Like Mesogen

Lahiri

Singh

2011

Molecular Crystals and Liquid Crystals

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A statistical mechanical perturbation theory has been used to describe discotic nematic-isotropic phase transition for a discotic liquid crystal, hexa(p-octyl phenyl ethynyl)benzene. We have employed the decoupling approximation, which introduces anisotropy in the pair correlation function, to investigate the discotic nematic-isotropic transition properties. The variation of second rank orientational order parameter with temperature has been computed and it shows qualitatively similar behavior to that of experimental studies of Aver'yanov [1]. However, the numerical value of order parameter at the transition found in the present work is larger than that of Aver'yanov's. The various thermodynamic properties have also been calculated at the transition.

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“…Snakehead Channa striatus is native to freshwater of tropical Africa and southern Asia, and is commonly cultured in many southeast Asian countries (Wee 1982). Airbreathing habits of snakehead at > 12 mm in total length allow its culture in oxygendepleted waters at high density (Singh et al 1986). This capability is highly desirable for commercial culture since large quantities of snakehead can be cultured on small land areas using little water.…”

Section: 0mentioning

confidence: 99%

Tolerance of Snakehead Channa striatus to Ammonia at Different pH

Qin

Fast

Kai

1997

J World Aquaculture Soc

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Ahsrracr.-Tolerance o f snakehead Channa srriatus to ammonia was tested at three pH levels (8.0, 9.0. and 10.0) in experimental tanks. At pH 8.0, ammonia LC50 estimates for snakehead at 24, 48, 72, and 96 h were >205.7, >203.5, 152.6, and 107.3 mg total ammonianitrogen (TAN)/L (or >10.3, >10.2, 7.6, and 5.4 mg NH,-N/L), respectively. At pH 9.0, ammonia LC50 estimates at 24,48, 72, and 96 h were >52.4, 62.8, 56.1, 43.4 mg TAN/L (or >18.0, 21.6, 19.3, and 14.9 mg NH,-N/L), respectively. At pH 10.0, ammonia LC50 estimates at 24, 48, 72, and 96 h were 25.7, 21.6, 20.3, and 18.7 mg TAN/ L (or 21.6, 18.1, 17.1, and 15.7 mg NH,-N/L). respectively. Our data indicate that the tolerance of snakehead to ammonia was associated with pH. Thus, we recommend that snakehead should not be subjected to prolonged exposures of NH,-N concentration more than 0.54 m a at pH 8.0, more than 1.49 mg/L at pH 9.0, or more than 1.57 mg/L at pH 0

show abstract

Oxygen uptake through water during early life in Channa punctatus (Bloch) (Pisces; Ophicephaliformes)

Cited by 15 publications

References 10 publications

Food selection and growth of young snakehead Channa striatus

Food selection and growth of young snakehead Channa striatus

Discotic Nematic-Isotropic Phase Transition Properties for a Disc-Like Mesogen

Tolerance of Snakehead Channa striatus to Ammonia at Different pH

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