Effect of different harvesting techniques on the production and population structure of Macrobrachium rosenbergii in a wetland ecosystem of South India

2016 ◽  
Vol 48 (7) ◽  
pp. 3962-3974
Author(s):  
Ranjeet Kutty ◽  
Madhusoodana Bhaskara Pillai Kurup
Keyword(s):  
Population Structure ◽  
South India ◽  
Macrobrachium Rosenbergii ◽  
Wetland Ecosystem ◽  
Harvesting Techniques

EFFECT OF POPULATION STRUCTURE AND DENSITY AT STOCKING ON PRODUCTION AND COMMERCIAL FEASIBILITY OF PRAWN (Macrobrachium rosenbergii) FARMING IN TEMPERATE CLIMATES1

2009 ◽  
Vol 12 (1) ◽  
pp. 231-250
Author(s):  
Theodore I. J. Smith ◽  
Paul A. Sandifer ◽  
Wallace E. Jenkins ◽  
Alvin D. Stokes
Keyword(s):  
Population Structure ◽  
Macrobrachium Rosenbergii

scholarly journals Legacy of draught cattle breeds of South India: Insights into population structure, genetic admixture and maternal origin

PLoS ONE ◽  
2021 ◽  
Vol 16 (5) ◽  
pp. e0246497
Author(s):  
Vandana Manomohan ◽  
Ramasamy Saravanan ◽  
Rudolf Pichler ◽  
Nagarajan Murali ◽  
Karuppusamy Sivakumar ◽  
...  
Keyword(s):  
Population Structure ◽  
Population Size ◽  
Effective Population Size ◽  
South India ◽  
Genetic Admixture ◽  
Zebu Cattle ◽  
Effective Population ◽  
Cattle Breeds ◽  
South Indian ◽  
Indian Cattle

The present study is the first comprehensive report on diversity, population structure, genetic admixture and mitochondrial DNA variation in South Indian draught type zebu cattle. The diversity of South Indian cattle was moderately high. A significantly strong negative correlation coefficient of -0.674 (P<0.05) was observed between the effective population size of different breeds and their estimated FIS. The genetic structure analysis revealed the distinctness of Kangayam, Vechur and Punganur cattle from the rest of the zebu breeds. The results showed the influence of Hallikar breed in the development of most Mysore type cattle breeds of South India with the exception of Kangayam. Bayesian clustering analysis was performed to assess the taurine admixture in South Indian zebu cattle using purebred Jersey and Holstein-Friesian as reference genotypes. Relatively high levels of taurine admixture (>6.25%) was observed in Punganur, Vechur, Umblachery and Pulikulam cattle breeds. Two major maternal haplogroups, I1 and I2, typical of zebu cattle were observed, with the former being predominant than the later. The pairwise differences among the I2 haplotypes of South Indian cattle were relatively higher than West Indian (Indus valley site) zebu cattle. The results indicated the need for additional sampling and comprehensive analysis of mtDNA control region variations to unravel the probable location of origin and domestication of I2 zebu lineage. The present study also revealed major concerns on South Indian zebu cattle (i) risk of endangerment due to small effective population size and high rate of inbreeding (ii) lack of sufficient purebred zebu bulls for breeding and (iii) increasing level of taurine admixture in zebu cattle. Availability of purebred semen for artificial insemination, incorporation of genomic/molecular information to identify purebred animals and increased awareness among farmers will help to maintain breed purity, conserve and improve these important draught cattle germplasms of South India.

Genetic variation and population structure inOryza malampuzhaensis Krish.et Chand. endemic to Western Ghats, South India

2001 ◽  
Vol 80 (3) ◽  
pp. 141-148 ◽  
Author(s):  
George Thomas ◽  
Sreejayan ◽  
Latha Joseph ◽  
Philomena Kuriachan
Keyword(s):  
Population Structure ◽  
Genetic Variation ◽  
Western Ghats ◽  
South India

The effect of density of Macrobrachium rosenbergii raised in earthen ponds on their population structure and weight distribution

Aquaculture ◽  
1986 ◽  
Vol 52 (4) ◽  
pp. 307-320 ◽  
Author(s):  
Ilan Karplus ◽  
Gideon Hulata ◽  
Giora W. Wohlfarth ◽  
Amir Halevy
Keyword(s):  
Population Structure ◽  
Weight Distribution ◽  
Macrobrachium Rosenbergii ◽  
Earthen Ponds

Effects of Substrate Amount and Orientation on Production and Population Structure of Freshwater Prawns Macrobrachium rosenbergii in Ponds

2002 ◽  
Vol 33 (1) ◽  
pp. 63-69 ◽  
Author(s):  
James H. Tidwell ◽  
Shawn D. Coyle ◽  
Aaron Arnum ◽  
Charles Weibel
Keyword(s):  
Population Structure ◽  
Macrobrachium Rosenbergii

scholarly journals Tracing the biogeographical origin of South Asian populations using DNA SatNav

2016 ◽  
Author(s):  
Ranajit Das ◽  
Priyanka Upadhyai
Keyword(s):  
Population Structure ◽  
South Asian ◽  
South India ◽  
Indian Subcontinent ◽  
Population History ◽  
Genetic Admixture ◽  
Indian Populations ◽  
Asian Populations ◽  
South Indian ◽  
North And South

AbstractThe Indian subcontinent includes India, Bangladesh, Pakistan, Nepal, Bhutan, and Sri Lanka that collectively share common anthropological and cultural roots. Given the enigmatic population structure, complex history and genetic heterogeneity of populations from this region, their biogeographical origin and history remain a fascinating question. In this study we carried out an in-depth genetic comparison of the five South Asian populations available in the 1000 Genomes Project, namely Gujarati Indians from Houston, Texas (GIH), Punjabis from Lahore (PJL), Indian Telugus from UK (ITU), Sri Lankan Tamils from UK (STU) and Bengalis from Bangladesh (BEB), tracing their putative biogeographical origin using a DNA SatNav algorithm - Geographical Population Structure (GPS). GPS positioned >70% of GIH and PJL genomes in North India and >80% of ITU and STU samples in South India. All South Asian genomes appeared to be assigned with reasonable accuracy, along trade routes that thrived in the ancient Mauryan Empire, which had played a significant role in unifying the Indian subcontinent and in the process brought the ancient North and South Indian populations in close proximity, promoting admixture between them, ~2300 years before present (YBP). Our findings suggest that the genetic admixture between ancient North and South Indian populations likely first occurred along the Godavari and Krishna river basin in Central-South India. Finally our biogeographical analyses provide critical insights into the population history and sociocultural forces driving migration patterns that may have been instrumental in shaping the population structure of the Indian subcontinent.

scholarly journals The story of the lost twins: decoding the genetic identities of the Kumhar and Kurcha populations from the Indian subcontinent

BMC Genetics ◽  
2020 ◽  
Vol 21 (S1) ◽  
Author(s):  
Ranajit Das ◽  
Vladimir A. Ivanisenko ◽  
Anastasia A. Anashkina ◽  
Priyanka Upadhyai
Keyword(s):  
Population Structure ◽  
South India ◽  
Indian Subcontinent ◽  
Uttar Pradesh ◽  
Principal Component ◽  
Population History ◽  
North India ◽  
Geographic Population ◽  
Indian Populations ◽  
History Of

Abstract Background The population structure of the Indian subcontinent is a tapestry of extraordinary diversity characterized by the amalgamation of autochthonous and immigrant ancestries and rigid enforcement of sociocultural stratification. Here we investigated the genetic origin and population history of the Kumhars, a group of people who inhabit large parts of northern India. We compared 27 previously published Kumhar SNP genotype data sampled from Uttar Pradesh in north India to various modern day and ancient populations. Results Various approaches such as Principal Component Analysis (PCA), Admixture, TreeMix concurred that Kumhars have high ASI ancestry, minimal Steppe component and high genomic proximity to the Kurchas, a small and relatively little-known population found ~ 2500 km away in Kerala, south India. Given the same, biogeographical mapping using Geographic Population Structure (GPS) assigned most Kumhar samples in areas neighboring to those where Kurchas are found in south India. Conclusions We hypothesize that the significant genomic similarity between two apparently distinct modern-day Indian populations that inhabit well separated geographical areas with no known overlapping history or links, likely alludes to their common origin during or post the decline of the Indus Valley Civilization (estimated by ALDER). Thereafter, while they dispersed towards opposite ends of the Indian subcontinent, their genomic integrity and likeness remained preserved due to endogamous social practices. Our findings illuminate the genomic history of two Indian populations, allowing a glimpse into one or few of numerous of human migrations that likely occurred across the Indian subcontinent and contributed to shape its varied and vibrant evolutionary past.

The effect of size-grading juvenile Macrobrachium rosenbergii prior to stocking on their population structure and production in polyculture

Aquaculture ◽  
1986 ◽  
Vol 56 (3-4) ◽  
pp. 257-270 ◽  
Author(s):  
Ilan Karplus ◽  
Gideon Hulata ◽  
Giora W. Wohlfarth ◽  
Amir Halevy
Keyword(s):  
Population Structure ◽  
Macrobrachium Rosenbergii ◽  
Size Grading
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