In Vivo Apparent Digestibility of Fiber in Florida Manatees (Trichechus manatus latirostris) Under Human Care

Harshaw, Lauren; Larkin, Iskande V.; Staples, C.R.; Scott, Karen C.; Hill, Richard

doi:10.1578/am.45.5.2019.513

Cited by 2 publications

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“…Studies have shown that supplementation with yeast selenium can improve the activity of fiber-degrading bacteria [ 20 ] and improve the digestibility of cellulose and hemicellulose in dairy cows [ 21 ]. This is because fiber-degrading bacteria in the rumen promote the release of cellulase, which can degrade cellulose [ 22 ], unlock the chemical bond between cellulose and hemicellulose [ 23 ], expose lignin and facilitate the conversion of crude fibers into microbial proteins in the rumen for the body to use [ 20 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of Different Yeast Selenium Levels on Rumen Fermentation Parameters, Digestive Enzyme Activity and Gastrointestinal Microflora of Sika Deer during Antler Growth

et al. 2023

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The aim of this experiment was to study the effects of different selenium supplemental levels on rumen fermentation microflora of sika deer at the velvet antler growth stage. A total of 20 5-year-old, healthy sika deer at the velvet antler growth stage with an average body weight of (98.08 ± 4.93) kg were randomly divided into 4 groups, and each group was fed in a single house. The SY1 group was the control group, and the SY2 group, SY3 group and SY4 group were fed a basal diet supplemented with 0.3, 1.2 and 4.8 mg/kg selenium, respectively. The pretest lasted for 7 days, and the formal trial period lasted for 110 days. The results show that: At the velvet antler growth stage, the digestibility of neutral detergent fiber and acid detergent fiber of sika deer in the SY2 group was significantly higher than that in the control group (p < 0.01). The digestibility of cellulose and crude fiber of sika deer in the SY2 group was significantly higher than those in the SY3 and SY4 groups (p < 0.01) and significantly higher than that in the control group (p < 0.05). The contents of acetic acid and propionic acid in the rumen fluid of sika deer in the SY2 group were significantly higher than those in the SY1 group (p < 0.05). Digestive enzyme analysis of rumen fluid at the velvet antler growth stage showed that the activity of protease in rumen fluid in the SY2 group was significantly lower than those in the SY1 group and SY4 group (p < 0.05). The relative abundance of Fibrobacter succinogenes in the SY2 group was significantly higher than that in the SY1 group (p < 0.05) and extremely significantly higher than those in the SY3 and SY4 groups (p < 0.01). Correlation analysis between yeast selenium level and bacterial abundance showed that the yeast selenium content in rumen fluid was significantly positively correlated with Butyrivibrio and Succiniclasticum (p < 0.01). Further verification of bacterial flora functioning showed that the SY2 group was more inclined to the degradation and utilization of fiber. In conclusion, 0.3 mg/kg selenium supplementation can increase the abundance of Prevotella ruminicola and Fibrobacter succinogenes in the rumen of sika deer and improve the degradation of fibrous substances by mediating the catabolite repression process.

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Section: Discussionmentioning

confidence: 99%

Effects of Different Yeast Selenium Levels on Rumen Fermentation Parameters, Digestive Enzyme Activity and Gastrointestinal Microflora of Sika Deer during Antler Growth

et al. 2023

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“…West Indian manatees have a slow digestive passage rate 77 – 79 , efficient decomposition of fibrous material through microbial degradations 79 , and high digestive efficiency 80 . According to a recent study, low-fiber manatee diets may be more digestible because they have less lignin content 81 . Thus, since marine angiosperms have low lignin values when compared with terrestrial angiosperms 76 , it can be expected a greater digestibility in manatees living in coastal marine environments when compared to manatees that feed on terrestrial or freshwater aquatic plants.…”

Section: Discussionmentioning

confidence: 99%

Analysis of body condition indices reveals different ecotypes of the Antillean manatee

Castelblanco‐Martínez

Slone

Landeo-Yauri³

et al. 2021

Sci Rep

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Assessing the body condition of wild animals is necessary to monitor the health of the population and is critical to defining a framework for conservation actions. Body condition indices (BCIs) are a non-invasive and relatively simple means to assess the health of individual animals, useful for addressing a wide variety of ecological, behavioral, and management questions. The Antillean manatee (Trichechus manatus manatus) is an endangered subspecies of the West Indian manatee, facing a wide variety of threats from mostly human-related origins. Our objective was to define specific BCIs for the subspecies that, coupled with additional health, genetic and demographic information, can be valuable to guide management decisions. Biometric measurements of 380 wild Antillean manatees captured in seven different locations within their range of distribution were obtained. From this information, we developed three BCIs (BCI1 = UG/SL, BCI2 = W/SL3, BCI3 = W/(SL*UG2)). Linear models and two-way ANCOVA tests showed significant differences of the BCIs among sexes and locations. Although our three BCIs are suitable for Antillean manatees, BCI1 is more practical as it does not require information about weight, which can be a metric logistically difficult to collect under particular circumstances. BCI1 was significantly different among environments, revealing that the phenotypic plasticity of the subspecies have originated at least two ecotypes—coastal marine and riverine—of Antillean manatees.

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In Vivo Apparent Digestibility of Fiber in Florida Manatees (Trichechus manatus latirostris) Under Human Care

Cited by 2 publications

References 0 publications

Effects of Different Yeast Selenium Levels on Rumen Fermentation Parameters, Digestive Enzyme Activity and Gastrointestinal Microflora of Sika Deer during Antler Growth

Effects of Different Yeast Selenium Levels on Rumen Fermentation Parameters, Digestive Enzyme Activity and Gastrointestinal Microflora of Sika Deer during Antler Growth

Analysis of body condition indices reveals different ecotypes of the Antillean manatee

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