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Tytuł pozycji:

5334000-53340000Optimal Salinity for Head-Starting Northern River Terrapin s (Batagur baska Gray, 1831).

Tytuł :
5334000-53340000Optimal Salinity for Head-Starting Northern River Terrapin s (Batagur baska Gray, 1831).
Autorzy :
Jualaong S; Marine and Coastal Resources Research and Development Center, Lower Gulf of Thailand, Songkhla 90100, Thailand. .
Songnui A; Trang Coastal Fisheries Research and Development Center, Trang 92150, Thailand. .
Thongprajukaew K; Department of Applied Science, Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand. .
Ninwat S; Marine and Coastal Resources Research and Development Center, Lower Gulf of Thailand, Songkhla 90100, Thailand. .
Khwanmaung S; Satun Inland Aquaculture Research and Development Center, Satun 91110, Thailand. .
Hahor W; Department of Applied Science, Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand. .
Khunsaeng P; Pattani Coastal Aquaculture Research and Development Center, Pattani 94150, Thailand. .
Kanghae H; Phuket Marine Biological Center, Phuket 83000, Thailand. .
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Źródło :
Animals : an open access journal from MDPI [Animals (Basel)] 2019 Oct 23; Vol. 9 (11). Date of Electronic Publication: 2019 Oct 23.
Typ publikacji :
Journal Article
Język :
English
Imprint Name(s) :
Original Publication: Basel, Switzerland : Molecular Diversity Preservation International, 2011-
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Contributed Indexing :
Keywords: carapace; digestive enzyme; elemental composition; feces; feed utilization; growth; head-starting program; hematological parameter
Entry Date(s) :
Date Created: 20191027 Latest Revision: 20200928
Update Code :
20210914
PubMed Central ID :
PMC6912722
DOI :
10.3390/ani9110855
PMID :
31652752
Czasopismo naukowe
Northern river terrapins ( Batagur baska Gray, 1831) are Asia's largest turtles living in both freshwater and brackish water. In the current study, the optimal salinity for head-starting programs of this critically endangered species was investigated in order to serve the well-being of turtles before release to natural habitat. Forty-eight terrapins (54.64 ± 0.18 g initial body weight) were randomly distributed to four salinity levels (0, 4, 8, and 12 ppt) and reared for eight weeks, using three replicates with four terrapins each. At the end of rearing trial, growth performance and feed utilization parameters were superior in terrapins reared at 4 ppt, followed by 8 ppt in the rank order of treatments. Negative stress responses were observed in terrapins reared at 12 ppt, as the fecal activity of amylase-to-trypsin ratio was changed significantly, but not that of proteolytic enzymes. The fecal thermal transition properties indicated an abundance of nutrients in the post-absorptive phase for terrapins reared at 4 ppt, followed by the 8 ppt treatment group. The preferred 4 ppt salinity had no negative effects on the health status of the terrapins in terms of carapace elemental composition or hematological parameters. Second-order polynomial regression suggests 4.35 ppt as the optimal salinity for maximal weight gain. Findings from the current study could be directly used in ex situ conservation programs of northern river terrapins before release to natural habitat.
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