The Experts below are selected from a list of 29220 Experts worldwide ranked by ideXlab platform
Chenhuei Huang - One of the best experts on this subject based on the ideXlab platform.
-
effects of dietary vitamin c on growth lipid oxidation and Carapace strength of soft shelled turtle pelodiscus sinensis
Aquaculture, 2015Co-Authors: Chengchin Wang, Chenhuei HuangAbstract:Abstract A feeding trial was conducted to evaluate the effects of dietary vitamin C level on the growth, liver lipid oxidation, and Carapace strength of juvenile soft-shelled turtles, Pelodiscus sinensis . Seven experimental diets containing 0–619 mg vitamin C/kg were fed to 140 individually reared soft-shelled turtles with an average weight of 4.3 ± 0.07 g for 8 weeks. There was no significant difference ( p > 0.05) in weight gain, feed conversion ratio, protein efficiency ratio, and muscle composition among turtles fed different test diets. Muscle composition was as follows: moisture, 73.5%; crude protein, 18.3%; lipid, 2.82%; and ash, 0.73%. Hepatic vitamin C concentration, liver tissue lipid oxidation, Carapace strength, and Carapace collagen content in turtles fed the vitamin C-free diet were the lowest among the dietary groups. The highest Carapace strength was observed in turtles fed a diet containing approximately 350 mg of vitamin C/kg. Although the absence of dietary vitamin C did not impact the growth of the turtles, the supplementation of vitamin C could enhance the Carapace strength and collagen content of the soft-shelled turtles. Analyzed by a polynomial regression, the estimated dietary vitamin C level for optimal Carapace collagen and strength of the soft-shelled turtles was approximately 370–380 mg/kg.
Chengchin Wang - One of the best experts on this subject based on the ideXlab platform.
-
effects of dietary vitamin c on growth lipid oxidation and Carapace strength of soft shelled turtle pelodiscus sinensis
Aquaculture, 2015Co-Authors: Chengchin Wang, Chenhuei HuangAbstract:Abstract A feeding trial was conducted to evaluate the effects of dietary vitamin C level on the growth, liver lipid oxidation, and Carapace strength of juvenile soft-shelled turtles, Pelodiscus sinensis . Seven experimental diets containing 0–619 mg vitamin C/kg were fed to 140 individually reared soft-shelled turtles with an average weight of 4.3 ± 0.07 g for 8 weeks. There was no significant difference ( p > 0.05) in weight gain, feed conversion ratio, protein efficiency ratio, and muscle composition among turtles fed different test diets. Muscle composition was as follows: moisture, 73.5%; crude protein, 18.3%; lipid, 2.82%; and ash, 0.73%. Hepatic vitamin C concentration, liver tissue lipid oxidation, Carapace strength, and Carapace collagen content in turtles fed the vitamin C-free diet were the lowest among the dietary groups. The highest Carapace strength was observed in turtles fed a diet containing approximately 350 mg of vitamin C/kg. Although the absence of dietary vitamin C did not impact the growth of the turtles, the supplementation of vitamin C could enhance the Carapace strength and collagen content of the soft-shelled turtles. Analyzed by a polynomial regression, the estimated dietary vitamin C level for optimal Carapace collagen and strength of the soft-shelled turtles was approximately 370–380 mg/kg.
Rafał Wróbel - One of the best experts on this subject based on the ideXlab platform.
-
Biodiversity of Carapace epibiont diatoms in loggerhead sea turtles ( Caretta caretta Linnaeus 1758) in the Aegean Sea Turkish coast
PeerJ, 2020Co-Authors: Aydın Kaleli, Ana Car, Andrzej Witkowski, Marta Krzywda, Catherine Riaux-gobin, Cüneyt Nadir Solak, Yakup Kaska, Izabela Zgłobicka, Tomasz Płociński, Rafał WróbelAbstract:Background. The Aegean Sea coast of Turkey hosts one of the most important nesting grounds for loggerhead sea turtles (Caretta caretta) in the Mediterranean Sea. Previous studies have revealed that the sea turtle Carapace provides favourable conditions for various epibiontic organisms. Epibionts occurring on the Carapace have been examined from different locations in the oceans. Methods. This is the first time such a high number (39) of samples collected from nesting turtles during such a long time period (extending from 2011 to 2018) has been used for the study of the diatom component of the microbiome on the turtle Carapaces. A total of 33 samples were investigated in terms of light microscopy (LM) and scanning electron microscopy (SEM). Six unprocessed biofilm fragments were subject to SEM observations. Results. A total of 457 epizoic diatom taxa belonging to 86 genera were identified. Epizoic forms, e.g., Achnanthes spp., Chelonicola spp. or Tripterion spp. (also identified by SEM observations of the undisturbed pieces of the microbiome) dominated in terms of relative abundance, but the highest numbers of taxa were ubiquitously represented by Navicula (79), Nitzschia (45), Amphora (40), Cocconeis (32), Diploneis (25) and Mastogloia (23). Navicula perminuta and Delphineis australis were the most frequent taxa, present in 65% of the samples, both with an average relative abundance of 10%. The results of our study revealed that diatoms are an essential component of the loggerhead sea turtles' microbiome, in terms of high biodiversity and abundance. Although strict epibionts provide a signature of the turtle microbiome, the Carapace as a solid substrate attracts numerous benthic diatom species which are consideredopportunistic forms and can be found in the surrounding benthic habitats of the vastocean littoral space.
Gustavo Hormiga - One of the best experts on this subject based on the ideXlab platform.
-
The Shape of Weaver: Investigating Shape Disparity in Orb-Weaving Spiders (Araneae, Araneidae) Using Geometric Morphometrics
Evolutionary Biology, 2019Co-Authors: Robert J. Kallal, Andrew J. Moore, Gustavo HormigaAbstract:Sexual size dimorphism in orb-weaving spiders is a relatively well-studied phenomenon, and numerous works have documented evolutionary variation in interspecific size and degree of dimorphism. To date, these studies have been largely limited to assessing the evolution of a single or few linear measurements correlated with body size. While the descriptive and comparative literature is rich with qualitative and linear comparisons that distinguish the sexes and characterize species, the extent to which interspecific or dimorphic variation in size correlates with morphological shape remains relatively unexplored. The Carapace of spiders is generally conserved in shape, especially among members of the same family, but is neither well-characterized as a potential facet of spider sexual dimorphism nor as a variable structure overall. Here, we use geometric morphometric techniques to quantify differences in Carapace shape among members of the family Araneidae and test for allometric influences on interspecific and dimorphic shape differences across orb-weavers. We show that females and males differ in shape, occupying overlapping but distinct areas of morphospace, with males having more piriform Carapaces than females. Araneid spider subfamilies overlap substantially in morphospace, though interspecific differences in shape are generally greater than those distinguishing males and females of a species. Furthermore, we show that female Carapace shape shows phylogenetic signal and is more conserved than is male shape. Carapace shape differences made evident from canonical variates analysis are congruent with the more mobile lifestyle adopted by males, as a broader Carapace may support more robust leg musculature.
Aydın Kaleli - One of the best experts on this subject based on the ideXlab platform.
-
Biodiversity of Carapace epibiont diatoms in loggerhead sea turtles ( Caretta caretta Linnaeus 1758) in the Aegean Sea Turkish coast
PeerJ, 2020Co-Authors: Aydın Kaleli, Ana Car, Andrzej Witkowski, Marta Krzywda, Catherine Riaux-gobin, Cüneyt Nadir Solak, Yakup Kaska, Izabela Zgłobicka, Tomasz Płociński, Rafał WróbelAbstract:Background. The Aegean Sea coast of Turkey hosts one of the most important nesting grounds for loggerhead sea turtles (Caretta caretta) in the Mediterranean Sea. Previous studies have revealed that the sea turtle Carapace provides favourable conditions for various epibiontic organisms. Epibionts occurring on the Carapace have been examined from different locations in the oceans. Methods. This is the first time such a high number (39) of samples collected from nesting turtles during such a long time period (extending from 2011 to 2018) has been used for the study of the diatom component of the microbiome on the turtle Carapaces. A total of 33 samples were investigated in terms of light microscopy (LM) and scanning electron microscopy (SEM). Six unprocessed biofilm fragments were subject to SEM observations. Results. A total of 457 epizoic diatom taxa belonging to 86 genera were identified. Epizoic forms, e.g., Achnanthes spp., Chelonicola spp. or Tripterion spp. (also identified by SEM observations of the undisturbed pieces of the microbiome) dominated in terms of relative abundance, but the highest numbers of taxa were ubiquitously represented by Navicula (79), Nitzschia (45), Amphora (40), Cocconeis (32), Diploneis (25) and Mastogloia (23). Navicula perminuta and Delphineis australis were the most frequent taxa, present in 65% of the samples, both with an average relative abundance of 10%. The results of our study revealed that diatoms are an essential component of the loggerhead sea turtles' microbiome, in terms of high biodiversity and abundance. Although strict epibionts provide a signature of the turtle microbiome, the Carapace as a solid substrate attracts numerous benthic diatom species which are consideredopportunistic forms and can be found in the surrounding benthic habitats of the vastocean littoral space.
