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Insight into the gut microbiology of wild-caught Mangrove Red Snapper, Lutjanus argentimaculatus (Forsskal, 1775)

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Relation http://eprints.cmfri.org.in/12978/
https://www.sciencedirect.com/science/article/pii/S0044848617314096
 
Title Insight into the gut microbiology of wild-caught Mangrove Red Snapper,
Lutjanus argentimaculatus (Forsskal, 1775)
 
Creator Reshma, K J
Sumithra, T G
Nair, V Anusree
Stefi Raju, V
Kishore, T G
Sreenath, K R
Sanil, N K
 
Subject Microbiology
Snappers
 
Description Documenting bacteria present in healthy individuals forms the first step in understanding the effects of microbial
manipulation in aquaculture systems. Among the commensal microflora, gut microbiota has attracted extensive
attention owing to their role in host metabolism and health maintenance. Basic knowledge on normal gut microbes
within a particular host species is thus essential to determine how successfully these microbes can be
manipulated and engineered for sustainable aquaculture systems. In spite of the good aquaculture potential of
Mangrove red snapper, Lutjanus argentimaculatus, the information on microbial communities associated with the
gut of this fish, and their contribution towards digestive efficiency and disease resistance is scarce. Therefore, an
attempt was made to elucidate the abundance and diversity of cultivable gut microbes of wild caught L. argentimaculatus
along with their digestive exoenzyme profiles and prohibitory effect against fish pathogens.
Results on abundance showed similar gut bacterial loads as that of other marine fish imposing the less contribution
of microflora to the volume of gut materials in fish. Eleven distinct bacterial species including two
proposed novel vibrios were identified. An incidental observation of Morganella morganii throughout samples is
an alarming signal, emphasizing the need for immediate de-gutting to avoid histamine intoxication. Abundance
of digestive enzyme producers and excellent enzymatic potential of some isolates suggested the contribution of
digestive enzymes may supplement to the symbiosis between gut flora and host and the information is of interest
to aquaculture nutritionists/commercial industries. Interestingly, some isolates demonstrated estimable co-aggregation
with aquatic pathogens, indicating their involvement in disease resistance and the results correlated
well with gut microbial diversity. These findings highlight the significant role of gut microbes towards nutritional
physiology and disease resistance of this aquaculture candidate in natural ecosystem. The culturable
microbiota profiles of wild fish generated in the study can be applied for measuring the quality of husbandry
routines in aquaculture facility of this marine fish. Overall, the present study fetches insights on the gut microbiome
of healthy L. argentimaculatus which forms a platform for follow-up studies. The study may also help in
the development of “functional” fish feeds for L. argentimaculatus. The investigation also demonstrated some
potential digestive enzyme-producing isolates having probiotic applications in commercial aquaculture.
 
Publisher Elsevier
 
Date 2018
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/12978/1/Sumithra%20T%20G_2018_Aquaculture_An%20insight%20into%20the%20gut%20microbiology%20of%20wild-caught%20Mangrove%20Red%20Snapper%20Lutjanus%20argentimaculatus.pdf
Reshma, K J and Sumithra, T G and Nair, V Anusree and Stefi Raju, V and Kishore, T G and Sreenath, K R and Sanil, N K (2018) Insight into the gut microbiology of wild-caught Mangrove Red Snapper, Lutjanus argentimaculatus (Forsskal, 1775). Aquaculture, 497. pp. 320-330.