Gracilaria tenuistipitata var Liui were mono cultivated and co cultivated with Pinctada martensii under high (33) and low (21) salinity conditions in laboratory. The daily growth rate of the alga was determined. Tissu...Gracilaria tenuistipitata var Liui were mono cultivated and co cultivated with Pinctada martensii under high (33) and low (21) salinity conditions in laboratory. The daily growth rate of the alga was determined. Tissue carbon and nitrogen contents, the yield and fractional composition of agar were analyzed. Results showed that: 1. Gracilaria grew better under low salinity conditions, the daily growth rate was twice that under high salinity conditions. Co cultivated algae grew faster than mono cultivated algae under low salinity conditions, the daily growth rate was about 37.6% higher. 2. Compared with mono cultivated algae, tissue nitrogen contents of co cultivated algae were higher, while the C:N ratios were much lower. 3. The agar yields of co cultivated algae were much lower than those of mono cultivated algae. Agar yield was found to be negatively correlated to the tissue nitrogen contents, and positively correlated to the C:N ratios. 4. The highest fractional yields obtained from co cultivated algae were extracted with 40% ethanol, while from mono cultivated algae, the highest fractional yields obtained were extracted with distilled water at room temperature.展开更多
Gracilaria tenuistipitata varliui Zhang el Xia is cultivated at two different salinities (21, 33) in the laboratory for 4 weeks. The daily growth rate is determined. The total agar yield and fractional agar compositio...Gracilaria tenuistipitata varliui Zhang el Xia is cultivated at two different salinities (21, 33) in the laboratory for 4 weeks. The daily growth rate is determined. The total agar yield and fractional agar composition are analyzed. Results show that algae grow faster in low salinity. The total agar yield is higher under high salinity conditions than under low salinity conditions. Among the eight fractions extracted, the yields of cold water extract and 40% ethanol extract are about the highest In low salinities the yields of autoclaved extract and 60% ethanol extract are higher, while the yield of cold water extract is lower relative to high salinities.展开更多
Advertisement calls are essential for communication among anuran amphibians,with their production influenced by a range of environmental factors and morphological traits.To understand the primary sources of variation ...Advertisement calls are essential for communication among anuran amphibians,with their production influenced by a range of environmental factors and morphological traits.To understand the primary sources of variation of advertisement calls in male Leptobrachium liui,we recorded their advertisement calls during the breeding season and analyzed two primary acoustic parameters: call duration(CD) and dominant frequency(DF),along with their within-individual coefficients of variation.Additionally,we collected nest-related environmental parameters and morphological traits to investigate how these factors influence the variation in advertisement calls.Our analyses revealed that both nest-related environmental parameters(particularly water temperature) and individual morphological traits(especially head morphology) significantly influenced advertisement call characteristics in male L.liui.Water temperature showed a negative relationship with CD,while head morphology was positively associated with both CD and DF.These findings enhance our understanding of the factors shaping acoustic communication in L.liui during the breeding season and highlight the importance of both environmental and morphological factors in anuran vocalization.展开更多
A new species of gekkonid,Gekko liui sp.nov.,is described based on six specimens from Dazhou Island,Wanning City,Hainan,China.This new species is distinguished from its congeners by significant genetic divergence(>...A new species of gekkonid,Gekko liui sp.nov.,is described based on six specimens from Dazhou Island,Wanning City,Hainan,China.This new species is distinguished from its congeners by significant genetic divergence(>4.6% in the mitochondrial ND2 gene) and morphological characters,including a small body size(SVL 48.92– 56.67 mm,n = 6),nares in contact with rostral scale,37–42 interorbital scales between anterior corners of the eyes,140–148 ventral scales from mental to cloacal slit,103–118 midbody scale rows,34– 39 ventral scale rows,10–11 subdigital lamellae on the first toe and 12–13 on the fourth toe,webbing present in the fingers and toes,with tubercles on the dorsal surface of the tail,20–23 precloacal pores in males,and dorsal surface of body with six or seven large dark and brown bicolor bands between the nape and sacrum.The discovery of this new species brings the number of Gekko(subgenus Japonigekko) species in China to 23 and in Hainan Province to 4.展开更多
文摘Gracilaria tenuistipitata var Liui were mono cultivated and co cultivated with Pinctada martensii under high (33) and low (21) salinity conditions in laboratory. The daily growth rate of the alga was determined. Tissue carbon and nitrogen contents, the yield and fractional composition of agar were analyzed. Results showed that: 1. Gracilaria grew better under low salinity conditions, the daily growth rate was twice that under high salinity conditions. Co cultivated algae grew faster than mono cultivated algae under low salinity conditions, the daily growth rate was about 37.6% higher. 2. Compared with mono cultivated algae, tissue nitrogen contents of co cultivated algae were higher, while the C:N ratios were much lower. 3. The agar yields of co cultivated algae were much lower than those of mono cultivated algae. Agar yield was found to be negatively correlated to the tissue nitrogen contents, and positively correlated to the C:N ratios. 4. The highest fractional yields obtained from co cultivated algae were extracted with 40% ethanol, while from mono cultivated algae, the highest fractional yields obtained were extracted with distilled water at room temperature.
文摘Gracilaria tenuistipitata varliui Zhang el Xia is cultivated at two different salinities (21, 33) in the laboratory for 4 weeks. The daily growth rate is determined. The total agar yield and fractional agar composition are analyzed. Results show that algae grow faster in low salinity. The total agar yield is higher under high salinity conditions than under low salinity conditions. Among the eight fractions extracted, the yields of cold water extract and 40% ethanol extract are about the highest In low salinities the yields of autoclaved extract and 60% ethanol extract are higher, while the yield of cold water extract is lower relative to high salinities.
基金supported by the County-School Cooperation Project in Suichang County (2024-HZ12)Ecological Discipline Construction Fund of Lishui University。
文摘Advertisement calls are essential for communication among anuran amphibians,with their production influenced by a range of environmental factors and morphological traits.To understand the primary sources of variation of advertisement calls in male Leptobrachium liui,we recorded their advertisement calls during the breeding season and analyzed two primary acoustic parameters: call duration(CD) and dominant frequency(DF),along with their within-individual coefficients of variation.Additionally,we collected nest-related environmental parameters and morphological traits to investigate how these factors influence the variation in advertisement calls.Our analyses revealed that both nest-related environmental parameters(particularly water temperature) and individual morphological traits(especially head morphology) significantly influenced advertisement call characteristics in male L.liui.Water temperature showed a negative relationship with CD,while head morphology was positively associated with both CD and DF.These findings enhance our understanding of the factors shaping acoustic communication in L.liui during the breeding season and highlight the importance of both environmental and morphological factors in anuran vocalization.
基金supported by Hainan Wanning Dazhou Island Marine Ecosystem National Natural Reserve Project: Survey of Terrestrial Animal Resources。
文摘A new species of gekkonid,Gekko liui sp.nov.,is described based on six specimens from Dazhou Island,Wanning City,Hainan,China.This new species is distinguished from its congeners by significant genetic divergence(>4.6% in the mitochondrial ND2 gene) and morphological characters,including a small body size(SVL 48.92– 56.67 mm,n = 6),nares in contact with rostral scale,37–42 interorbital scales between anterior corners of the eyes,140–148 ventral scales from mental to cloacal slit,103–118 midbody scale rows,34– 39 ventral scale rows,10–11 subdigital lamellae on the first toe and 12–13 on the fourth toe,webbing present in the fingers and toes,with tubercles on the dorsal surface of the tail,20–23 precloacal pores in males,and dorsal surface of body with six or seven large dark and brown bicolor bands between the nape and sacrum.The discovery of this new species brings the number of Gekko(subgenus Japonigekko) species in China to 23 and in Hainan Province to 4.
