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Please use this identifier to cite or link to this item:
http://krishi.icar.gov.in/jspui/handle/123456789/25988
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Sreekakula A. Kathyayani | en_US |
dc.contributor.author | Modem Poornima | en_US |
dc.contributor.author | Suvana Sukumaran | en_US |
dc.contributor.author | A. Nagavel | en_US |
dc.contributor.author | M. Muralidhar | en_US |
dc.date.accessioned | 2019-11-30T07:01:42Z | - |
dc.date.available | 2019-11-30T07:01:42Z | - |
dc.date.issued | 2019-08-29 | - |
dc.identifier.citation | Not Available | en_US |
dc.identifier.issn | Not Available | - |
dc.identifier.uri | http://krishi.icar.gov.in/jspui/handle/123456789/25988 | - |
dc.description | Not Available | en_US |
dc.description.abstract | Of late, Pacific white shrimp Penaeus vannamei culture has intensified globally and is a major contributor to the cultured shrimp produced worldwide. Intensification of its culture has led to elevated ammonia concentration during grow-out. Ammonia toxicity is a function of water pH, temperature, salinity and beyond the optimum range, creates stress to cultured aquatic species which can reduce growth, increase susceptibility to diseases and eventually mortality. The present study was aimed at quantifying the toxic effect of total ammonia nitrogen (TAN) (1, 3, 6 & 9 mg/l) and pH levels (6, 8 & 10) individually and in combination on median survival (50% lethal time) of shrimp (8 g) after exposure for 14 days followed by post-stress challenge with white spot syndrome virus (WSSV) for 9 days. Mortality risk factor and the toxicity effect on the immune variables were evaluated. Individual stressors showed a risk factor of 1–13 times, whereas combined treatments considerably increased the risk of dying compared to control. Low survival (15%) was observed in pH6TAN9 and pH10TAN3 treatments and was substantiated by prominent histological obliteration in gills of shrimp. The cumulative mortality in post-stress WSSV challenged trials was 1–5 times and 1–35 times in individual and combination treatments, respectively compared to control. The study revealed that variations in ammonia and pH beyond the optimal range significantly influence the non-specific immune mechanisms in P.vannamei and increases the susceptibility to WSSV especially in combination treatments. | en_US |
dc.description.sponsorship | Not Available | en_US |
dc.language.iso | English | en_US |
dc.publisher | Not Available | en_US |
dc.relation.ispartofseries | Not Available; | - |
dc.subject | P. vannamei | en_US |
dc.subject | Total ammonia nitrogen | en_US |
dc.subject | pH | en_US |
dc.subject | Mortality risk factor | en_US |
dc.subject | Immune variables and | en_US |
dc.subject | WSSV | en_US |
dc.title | Effect of ammonia stress on immune variables of Pacific white shrimp Penaeus vannamei under varying levels of pH and susceptibility to white spot syndrome virus | en_US |
dc.title.alternative | Not Available | en_US |
dc.type | Article | en_US |
dc.publication.projectcode | Not Available | en_US |
dc.publication.journalname | Ecotoxicology and Environmental Safety | en_US |
dc.publication.volumeno | 184(2019) 109626 | en_US |
dc.publication.pagenumber | 1-13 | en_US |
dc.publication.divisionUnit | Not Available | en_US |
dc.publication.sourceUrl | Not Available | en_US |
dc.publication.authorAffiliation | ICAR::Central Institute of Brackishwater Aquaculture | en_US |
dc.ICARdataUseLicence | http://krishi.icar.gov.in/PDF/ICAR_Data_Use_Licence.pdf | en_US |
dc.publication.naasrating | 10.87 | en_US |
Appears in Collections: | FS-CIBA-Publication FS-CIBA-Publication |
Files in This Item:
File | Description | Size | Format | |
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EES-2019 (pHxTAN).pdf | 2.24 MB | Adobe PDF | View/Open |
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