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Genetic mechanism of body size variation in groupers:Insights from phylotranscriptomics
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作者 Wei-Wei Zhang Zhuo-Ying Weng +5 位作者 Xi Wang Yang Yang Duo Li Le Wang Xiao-Chun Liu Zi-Ning Meng 《Zoological Research》 SCIE CSCD 2024年第2期314-328,共15页
Animal body size variation is of particular interest in evolutionary biology,but the genetic basis remains largely unknown.Previous studies have shown the presence of two parallel evolutionary genetic clusters within ... Animal body size variation is of particular interest in evolutionary biology,but the genetic basis remains largely unknown.Previous studies have shown the presence of two parallel evolutionary genetic clusters within the fish genus Epinephelus with evident divergence in body size,providing an excellent opportunity to investigate the genetic basis of body size variation in vertebrates.Herein,we performed phylotranscriptomic analysis and reconstructed the phylogeny of 13 epinephelids originating from the South China Sea.Two genetic clades with an estimated divergence time of approximately 15.4 million years ago were correlated with large and small body size,respectively.A total of 180 rapidly evolving genes and two positively selected genes were identified between the two groups.Functional enrichment analyses of these candidate genes revealed distinct enrichment categories between the two groups.These pathways and genes may play important roles in body size variation in groupers through complex regulatory networks.Based on our results,we speculate that the ancestors of the two divergent groups of groupers may have adapted to different environments through habitat selection,leading to genetic variations in metabolic patterns,organ development,and lifespan,resulting in body size divergence between the two locally adapted populations.These findings provide important insights into the genetic mechanisms underlying body size variation in groupers and species differentiation. 展开更多
关键词 Phylotranscriptomics GROUPER body size Rapidly evolving genes(REGs) Positively selected genes(PSGs)
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Correlation between Single Nucleotide Polymorphism Detection of Intron 1 of PRL Gene with Body Size Traits in Jingjiang Partridge Duck
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作者 杨军 罗家琴 +3 位作者 唐登华 殷裕斌 李伟国 罗静波 《Agricultural Science & Technology》 CAS 2010年第4期113-115,179,共4页
[Objective]The research aimed to study the polymorphism of intron 1 and its effects on prolactin(PRL) gene and body size traits of Jingjiang Partridge Duck.[Method]Taking 96 Jingjiang partridge ducks as materials,th... [Objective]The research aimed to study the polymorphism of intron 1 and its effects on prolactin(PRL) gene and body size traits of Jingjiang Partridge Duck.[Method]Taking 96 Jingjiang partridge ducks as materials,the polymorphism of intron 1 of PRL gene was detected by PCR-RFLP method.And the relationship between the gene polymorphism and body size traits was analyzed.[Result]Intron 1 in PRL gene of Jingjiang Partridge Duck had sequence polymorphism.Two kinds of genotypes(AB and BB) were detected by DraⅠrestriction and genotype BB was dominant in population(91.67%).The results of Chi-square test indicated that this site was in Hardy-Weinberg equilibrium in Jingjiang Duck(P 〉0.05).The results of least square analysis showed that the ducks with AB genotype had larger pelvis breadth(P 〈0.01) but smaller chest measurement(P 〈0.05) than those of BB ducks.[Conclusion]It was preliminarily concluded that PRL gene could be regarded as useful candidate gene(marker) for part of body size traits of Jingjiang Partridge Duck and part of body size traits can be improved by allele selection. 展开更多
关键词 Jingjiang Partridge Duck PRL gene PCR-RFLP body size traits
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Effects of Body Size and Environmental Factors on the Acoustic Structure and Temporal Rhythm of Calls in Rhacophorus dennysi 被引量:11
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作者 Jichao WANG Jianguo CUI +2 位作者 Haitao SHI Steven E.BRAUTH Yezhong TANG 《Asian Herpetological Research》 SCIE 2012年第3期205-212,共8页
In anurans, the outcomes of male-male contests and female choice are often associated with body size. In some species, males evaluate an opponent’s fighting ability and females evaluate male quality on the basis of m... In anurans, the outcomes of male-male contests and female choice are often associated with body size. In some species, males evaluate an opponent’s fighting ability and females evaluate male quality on the basis of male communication signals, which are thought to reflect information concerning male body size. Nevertheless, previous studies reveal that male call structure is not always correlated with body size. In the present study we investigated the relationships between body size and call structure in the large treefrog, Rhacophorus dennysi, as well as the relationship of its calling behavior with air temperature and humidity. The results show that both the dominant and fundamental frequencies are negatively correlated with body size, while inter-note intervals are positively correlated with body size, indicating that call characters could reflect body size in this species.Additionally, calling in this tropical species exhibits a circadian rhythm insofar as relatively high temperature and low humidity during the day is associated with less vocal behavior. Thus, individual variations in call structure are mainly dependent on body size while the temporal rhythm of calling activity is affected by environmental conditions in large treefrogs. 展开更多
关键词 advertisement call body size RHYTHM TEMPERATURE humidity Rhacophorus dennysi
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Differences in Thermal Preference and Tolerance among Three Phrynocephalus Lizards (Agamidae) with Different Body Sizes and Habitat Use 被引量:5
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作者 Zheng WANG Hongliang LU +1 位作者 Li MA Xiang JI 《Asian Herpetological Research》 SCIE 2013年第3期214-220,共7页
We acclimated adults of two viviparous (Phrynocephalus guinanens& and P. vlangalii) and one oviparous (P. versicolor) species of toad-headed lizards (Agamidae) to 28 ℃, 33 ℃ and 38 ℃ to examine whether therm... We acclimated adults of two viviparous (Phrynocephalus guinanens& and P. vlangalii) and one oviparous (P. versicolor) species of toad-headed lizards (Agamidae) to 28 ℃, 33 ℃ and 38 ℃ to examine whether thermal preference (preferred body temperature, Tp) and thermal tolerance (critical thermal minimum, CTMin; critical thermal maximum, CTMax) were affected by acclimation temperature, and correlate with body size and habitat use. Both Tp and CTMax were highest in P. versicolor and lowest in P. vlangalii, with P. guinanensis in between. The two viviparous species did not differ in CTMin and thermal tolerance range, and they both were more resistant to low temperatures and had a wider range of thermal tolerance than the oviparous species. Both CTMin and CTMax shifted upward as acclimation temperature increased in all the three species. Tp was higher in the lizards acclimated to 33 ℃ than in those to 28 ℃ or 38 ℃. The range of thermal tolerance was wider in the lizards acclimated to 28 ℃ than in those to 33 ℃ or 38 ℃. The data showed that: 1) thermal preference and tolerance were affected by acclimation temperature, and differed among the three species of Phrynocephalus lizards with different body sizes and habitat uses; 2) both Tp and CTMax were higher in the species exchanging heat more rapidly with the environment, and CTMin was higher in the species using warmer habitats during the active season; and 3) thermal preference and tolerance might correlat with body size and habitat use in Phrynocephalus lizards. 展开更多
关键词 AGAMIDAE Phrynocephalus lizards thermal preference thermal tolerance body size habitat use
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Factors determining the average body size of geographically separated Arctodiaptomus salinus (Daday, 1885) populations 被引量:2
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作者 Elena V. Anufriieva 《Zoological Research》 CAS CSCD 北大核心 2014年第2期132-141,共10页
Arctodiaptomus salinus inhabits water bodies across Eurasia and North Africa. Based on our own data and that from the literature, we analyzed the influences of several factors on the intra- and inter-population variab... Arctodiaptomus salinus inhabits water bodies across Eurasia and North Africa. Based on our own data and that from the literature, we analyzed the influences of several factors on the intra- and inter-population variability of this species. A strong negative linear correlation between temperature and average body size in the Crimean and African populations was found, in which the parameters might be influenced by salinity. Meanwhile, a significant negative correlation between female body size and the altitude of habitats was found by comparing body size in populations from different regions. Individuals from environments with highly varying abiotic parameters, e.g. temporary reservoirs, had a larger body size than individuals from permanent water bodies. The changes in average body mass in populations were at 11.4 times, whereas, those in individual metabolic activities were at 6.2 times. Moreover, two size groups of A. salinus in the Crimean and the Siberian lakes were observed. The ratio of female length to male length fluctuated between 1.02 and 1.30. The average size of A. salinus in populations and its variations were determined by both genetic and environmental factors. However, the parities of these factors were unequal in either spatial or temporal scales. 展开更多
关键词 Copepoda Aretodiaptomus salinus body size Sexual dimorphism VARIABILITY
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Heritability of resistance-related gene expression traits and their correlation with body size of clam Meretrix petechialis 被引量:1
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作者 JIANG Fengjuan YUE Xin +4 位作者 ZHANG Shujing YU Jiajia WANG Rui LIU Baozhong WANG Hongxia 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2020年第2期571-578,共8页
Gene expression variation can be considered as a phenotype,and it plays an important role in both acclimation and adaption.However,genetic variation of gene expression received much less attention than traditional com... Gene expression variation can be considered as a phenotype,and it plays an important role in both acclimation and adaption.However,genetic variation of gene expression received much less attention than traditional commercial traits in aquaculture.To estimate the genetic variation and heritability of gene transcription in clam Meretrix petechialis,five Vibrio resistance-related genes were selected for gene expression analysis in the digestive gland,and an animal linear model was used to analyze data from quantitative real-time PCR(qRT-PCR).Among the five genes,BIRC7 showed significant additive genetic variations,the heritability of this gene of 12-month-and 15-month-old clams were 0.84±0.32 and 0.91±0.34,respectively.The heritability of other four genes(Bax,NFIL3,Big-Def,and CTL9)expression were low-tomoderate but not significantly expressed.Additionally,no significant phenotypic and genetic correlations between the BIRC7 transcription trait and body size were detected.This study highlights that certain gene expression variation is heritable and provides a reference for indirect selection of M.petechialis with high Vibrio resistance. 展开更多
关键词 Meretrix petechialis transcription trait body size HERITABILITY genetic correlation
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No Evidence for Significant Effect of Body Size and Age on Male Mating Success in the Spot-legged Treefrog
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作者 Jianping YU Cheng CHEN +2 位作者 Long JIN Li ZHAO Wenbo LIAO 《Asian Herpetological Research》 SCIE CSCD 2016年第1期41-45,共5页
In anurans, body size and age of individuals generally affect male mating success. To test whether body size and age have effects on male mating success in the foam-nesting treefrog Polypedates megacephalus, a species... In anurans, body size and age of individuals generally affect male mating success. To test whether body size and age have effects on male mating success in the foam-nesting treefrog Polypedates megacephalus, a species widely distributed in China, we analyzed differences in body size and age between mated and unmated males for three populations using a Generalized Linear Mixed Model(GLMM). The results showed that mated males did not exhibit larger body size and older age than unmated males, suggesting that large and/or old male individuals did not have greater mating success than small and/or young males. Moreover, we also found a non-significant size-assortative mating pattern for all populations. Our findings suggest that body size and age of the foam-nesting treefrog do not affect male mating success. 展开更多
关键词 age body size male mating success Polypedates megacephalus size-assortative
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Fluctuation of Body Size and Body Weight of Jinchuan Female Yak within One Year
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作者 Xie Rongqing Luo Xiaolin +1 位作者 Fu Changxiu Guan Jiuqiang 《Animal Husbandry and Feed Science》 CAS 2017年第5期282-283,共2页
To understand the exact changes in body size and body weight of Jinchuan female yaks within one year,the body size and body weight of 30 Jinchuan female yaks were measured from July 2015 to July 2016. The results show... To understand the exact changes in body size and body weight of Jinchuan female yaks within one year,the body size and body weight of 30 Jinchuan female yaks were measured from July 2015 to July 2016. The results showed that the body weight of Jinchuan female yak declined continuously since October 2015,and the weight loss in November 2015 was the largest. The body weight started to increase in May 2016,and the body weight increased significantly in June and July of 2016. 展开更多
关键词 FEMALE YAK body size body WEIGHT Jinchuan COUNTY
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Body Size and Reproductive Tactics in Varanid lizards
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作者 Yu DU Longhui LIN +2 位作者 Yuntao YAO Chixian LIN Xiang JI 《Asian Herpetological Research》 SCIE 2014年第4期263-270,共8页
Body size and female reproduction in the water adult females larger than 500 mm SVL and 32 adult males Ledong, Hainan under permit to our laboratory in Hainan monitor lizard (Varanus salvator) were studied. Forty-tw... Body size and female reproduction in the water adult females larger than 500 mm SVL and 32 adult males Ledong, Hainan under permit to our laboratory in Hainan monitor lizard (Varanus salvator) were studied. Forty-two larger than 400 mm SVL were donated by local people in in 2013 and 2014. The largest male and female measured 745 and 755 mm SVL, respectively. The mean SVL was greater in adult females than in adult males. Males had larger heads (head width) than females of the same SVL. The smallest reproductive female in our sample was 565 mm SVL. Females produced a single clutch of 17.1 (10-23) pliable-shelled eggs per breeding season stretching from mid-June and mid-September. Clutch size and clutch mass were all positively related to female SVL. However, there was no significant linear relationship between egg mass and female SVL. Larger females generally produced more eggs, and thus heavier clutches than did smaller ones. There was no significant linear relationship between relative clutch mass and female SVL. Phylogenetic generalized least squares (PGLS) analysis, accounting for phylogenetic relationships, showed that clutch size was positively correlated with mean maternal SVL in varanid lizards. PGLS analysis showed that phylogenetic relationships did not affect clutch (or/and egg) mass and the SVL although there were significant linear relationship between clutch (or/and egg) mass and mean maternal SVL. Therefore, we could draw some general conclusions about the body size and reproductive tactics in varanid lizards that larger females generally produced more eggs, larger eggs and thus heavier clutches than did smaller ones. 展开更多
关键词 body size female reproduction monitor lizard VARANIDAE
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Variation and Sexual Dimorphism of Body Size in the Plateau Brown Frog along an Altitudinal Gradient
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作者 Xueyun FENG Wei CHEN +1 位作者 Junhua HU Jianping JIANG 《Asian Herpetological Research》 SCIE CSCD 2015年第4期291-297,共7页
Variation in body size and sexual size dimorphism(SSD) can have important consequences for animal ecology, behavior, population dynamics and the evolution of life-history traits. Organisms are expected to be larger ... Variation in body size and sexual size dimorphism(SSD) can have important consequences for animal ecology, behavior, population dynamics and the evolution of life-history traits. Organisms are expected to be larger in colder climate(i.e., Bergmann's rule) and SSD varies with body size(i.e., Rensch's rule). However, the underlying mechanisms are still elusive. The plateau brown frog(Rana kukunoris), a medium-sized anuran species with femalebiased SSD, is endemic to the Qinghai-Tibetan Plateau(QTP). From 1797 m(Maoxiang'ping) to 3453 m(Heihe'qiao) in the eastern margin of the QTP, we surveyed 10 populations of R. kukunoris and collected phalanges and snout vent length(SVL) data for 258 adult individuals(199 males versus 59 females). Based on these data, we explored how body size and SSD varying along the altitudinal gradient and examined the corresponding effects of temperature. We found body size to be larger at higher altitude for males but not for females, with likely effects from the temperature on the variation in male body size. Sex differences in growth rates may be the main cause of the variation in SSD. Our results suggested that only males follow the Bergmann's rule and variation in SSD of R. kukunoris do not support the Rensch's rule and its inverse. Therefore, the variations of body size can be different between sexes and the applicability of both Bergmann's rule and Rensch's rule should depend on species and environment where they live. 展开更多
关键词 Altitudinal gradient Bergmann's rule body size variation Qinghai-Tibetan Plateau Rana kukunoris Rensch's rule sexual size dimorphism
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Correlation Study on Body Size,Sexual Behavior and Semen Quality of Dezhou Donkey
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作者 Zhang Ruitao Zhang Yan +2 位作者 Zhang Shuai Huang Jinming Wang Changfa 《Animal Husbandry and Feed Science》 CAS 2017年第3期140-144,共5页
[ Objective] The study was to explore whether the body size, sexual behavior of male donkey had certain correlation with reproductive traits. [ Method] The data of body weight, body size and sexual behavior of male do... [ Objective] The study was to explore whether the body size, sexual behavior of male donkey had certain correlation with reproductive traits. [ Method] The data of body weight, body size and sexual behavior of male donkey during production were collected, combining with the semen quality data of ejaculation volume, density, motility and frozen-thawed semen motility were conducted the statistical analysis. [ Results] ( 1 ) Single ejaculation volume had a positive correlation with body height (r = 0. 423, P = 0. 044) and penis circumference (r = 0. 495, P = 0. 043 ) , and total number of sperm per ejaculate had a positiw: correlation with body weight (r = 0. 444, P = 0. 036) and scrotal circumference (r = 0. 520, P = 0. 039) ; (2) Ejaculation volume was negatively correlated with mount times (r = -0. 159, P = 0. 035) and erection time (r = -0. 181, P = 0. 023), semen density was negatively correlated with mating time (r = - 0.211, P = 0.004), and total sperm count was negatively correlated with erection time (r = - 0. 159 , P = 0. 047). [Condusion ] The quality of semen had a certain correlation with body size, body weight and sexual behavior. 展开更多
关键词 Dezhou donkey body size Sexual behavior Semen Quality CORRELATION
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Correlation Analysis between Body Size and Slaughter Performance in F-_1 Hybrid Offspring of Princess Chicken and Kirin Chicken
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作者 Li Naibin Du Bingwang +2 位作者 Yang Fenxia Tao Lin Chen Jiebo 《Animal Husbandry and Feed Science》 CAS 2014年第4期182-184,211,共4页
In order to study the meat development value of princess chicken,the body size traits and slaughter performance of 12-week-old F1 hybrid offspring of princess chicken(♂) and kirin chicken(♀) were measured and the co... In order to study the meat development value of princess chicken,the body size traits and slaughter performance of 12-week-old F1 hybrid offspring of princess chicken(♂) and kirin chicken(♀) were measured and the correlations between different traits were analyzed. The results showed that body length,keel length and shank length of male F1 hybrid offspring were significantly higher than those of female chickens(P 【 0. 05). The live weight,carcass weight,semi-eviscerated weight,semi-eviscerated ratio,eviscerated weight,chest muscle weight,the leg muscle weight and heart weight of male chickens were extremely significantly higher than that of female chickens(P 【 0. 01),and the leg muscle ratio and wings weight were significantly higher than that of female chickens(P 【 0. 05),but sebum thickness of male chickens was extremely significantly lower than that of female chickens(P 【 0. 01). Other indicators failed to reach the significant difference level. There were extremely significant or significant correlations between the slaughter performance and body size in F1 hybrid offspring. The regression equations between different indicators were identified and developed. The results provided a certain theoretical reference to predict slaughter performance indicators through a living body size measurement,and revealed an improved production performance of F1 hybrid offspring. 展开更多
关键词 Hybrid chickens body size Slaughter performance Correlation analysis
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Exploring the Effects of Land-Cover Configuration, Body Size and Trophic Diversity on the Avifauna Richness of Prince Edward Island, Canada
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作者 Marina Silva-Opps Joshua Mailhiot +1 位作者 Sheldon B. Opps Javier Sanchez 《Open Journal of Ecology》 2019年第7期216-237,共22页
We explored the effects of land-cover configuration, body size and trophic diversity in determining avian species richness on Prince Edward Island, Canada. Data on avian species richness were obtained from the Maritim... We explored the effects of land-cover configuration, body size and trophic diversity in determining avian species richness on Prince Edward Island, Canada. Data on avian species richness were obtained from the Maritime Breeding Bird Atlas data. Prince Edward Island was divided into 97 sampling cells of 10 × 10 km. Land-cover metrics were calculated using a forest inventory database, Fragstats and ArcView version 8.1. The relationships between avian species richness and explanatory variables were explored using correlation analysis, mixed forward-backward stepwise analysis, generalized linear models and Akaike’s information criterion. Models predicted between 27% and 63% of the variability in species richness, attributing substantial explanatory power to both the average body size and the range of body size spanned by the avian community. The body-size frequency distribution showed that avian communities were dominated by species weighing between 50 and 80 g. Habitat metrics associated with forests were more important to the avifauna than those related to agriculture. Avian species richness also decreased with both the fragmentation and isolation of wetlands. The total area covered by the human infrastructure land-cover and its subdivision were also important. Clearly, body size plays a key role in determining the diversity of birds on Prince Edward Island. In particular, species weighing 50 - 80 g appear to have sufficient resources to be successful on Prince Edward Island’s landscapes. Our findings also highlighted the importance of controlling the expansion of human infrastructure and both the fragmentation and reduction in size of wetlands to maintain avian species richness patterns. 展开更多
关键词 Species Richness body size BIRDS Spatial Variation LAND-COVER Structure HABITAT FRAGMENTATION
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Nonlinear Phenomena Conveying Body Size Information and Improving Attractiveness of the Courtship Calls in the Males of Odorrana tormota
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作者 Yatao WU Jiahui BAO +3 位作者 Pingshin LEE Jinmei WANG Sheng WANG Fang ZHANG 《Asian Herpetological Research》 SCIE CSCD 2021年第1期117-123,共7页
Nonlinear phenomena are commonly shown in the vocalization of animals and exerts different adaptive functions.Although some studies have pointed out that nonlinear phenomena can enhance the individual identification o... Nonlinear phenomena are commonly shown in the vocalization of animals and exerts different adaptive functions.Although some studies have pointed out that nonlinear phenomena can enhance the individual identification of male Odorrana tormota,whether the nonlinear phenomena play a specific role in the sexual selection of O.tormota remain unclear.Here we presented evidence that there was a significant negative correlation(Pearson:n=30,r=0.65,P<0.001)between the nonlinear phenomena content and snout-vent length in the male O.tormota,and two-choice amplexus experiments showed that female O.tormota preferred male with smaller body size containing higher nonlinear phenomena content in its calls.Phonotaxis experiments also revealed that females preferred calls with higher nonlinear phenomena content.Additionally,compared to the calls with lower nonlinear phenomena content and higher fundamental frequency,there was shorter response time in phonotactic behaviour of female induced by the calls with higher nonlinear phenomena content and lower fundamental frequency.We argue that the nonlinear phenomena content in the calls of male O.tormota can convey its body size information and may provide important clues for female frogs in darkened surroundings to identify males’body size during mate choice,meanwhile,higher nonlinear phenomena content in males’calls may increase the attractiveness of males to females.The results of this study provide confirmation that,for O.tormota,nonlinear phenomena have specific function in mate choice. 展开更多
关键词 body size mate choice nonlinear phenomena Odorrana tormota PHONOTAXIS
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Effects of diet and body size on phosphorus utilization of Liza haematocheila T. & S.
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作者 康斌 线薇薇 武云飞 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2008年第2期157-161,共5页
A 21-d laboratory experiment was conducted to study, the phosphorus (P) utilization of two different diets by redlip mullet Liza haematocheila T. & S. Sand-filtered water in salinity 30 and temperatare 25℃ was use... A 21-d laboratory experiment was conducted to study, the phosphorus (P) utilization of two different diets by redlip mullet Liza haematocheila T. & S. Sand-filtered water in salinity 30 and temperatare 25℃ was used. Twenty-nine fish individuals were divided into three groups: 11 to group 1 (G1) fed on diet 1, 11 to group 2 (G2) fed on diet 2, and 7 to contrast group. Diet 1 was a commercial feed, more valuable in nutrition than diet 2 that similar to natural detritus. The results show the intake phosphorus (IP) of G1 was significantly higher than that of G2, and both increased linearly with body size at a certain amount of diet. The retention phosphorus (RP) in fish of G1 was lower than G2. The relationship between retention phosphorus and body size was positive and stronger in G2. Significant difference in faecal phosphorus (FP) was found between G1 and G2. Body size significantly impacted the excretion phosphorus (EP) in G1 but G2. The loss of intake phosphorus in G1 was 10.83-20.27 mg per g fish weight gain, higher than that in G2 for 6.63-9.56. Of the phosphorus, about 10% was allocated into growth, 50% in faeces, and the rest lost in excretion. The main part of phosphorus was lost in faeces but excretion. The phosphorus budget of the fish could be described as 100IP = 7.40RP + 47.39FP + 36.63EP (Diet 1) or 100IP = 11.93RP + 56.64FP + 21.76EP (Diet 2). 展开更多
关键词 Liza haematocheila T. S. PHOSPHORUS DIET body size
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Study on Body Form and Garment Size Series of the Middle Age and Aged People
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作者 刘瑜 郁进明 《Journal of Donghua University(English Edition)》 EI CAS 2003年第4期60-63,共4页
This paper was designed to analyze on the data, which was obtained from 'National Physique Fitness Investigation Report (2000)'. In order to get the typical body form and figure type of the middle age and aged... This paper was designed to analyze on the data, which was obtained from 'National Physique Fitness Investigation Report (2000)'. In order to get the typical body form and figure type of the middle age and aged people, it was focused on the body form data of this group (age 40 - 60). After calculation and analyzing, the distinguishing feature of body form and the distribution of figure type were deduced. Finally, the re-classification of body form for Chinese middle age and aged people was suggested. It as also suggested that a new garment size series especially for the middle age and aged should be built to fit for these people. This conclusion would be useful and significant to design and production for clothing company, especially that who take the aged people as their target consumer. 展开更多
关键词 body form body form classification garment size and series middle age and aged people
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Body Size as an Indicator of Health for Green Turtles at the TCMP (Tobago Cays Marine Park), Eastern Caribbean
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作者 Olando Keri Harvey 《Journal of Environmental Science and Engineering(A)》 2013年第5期306-310,共5页
Gazetted in 1997, The TCMP (Tobago Cays Marine Park) is the only marine protected area within the territorial boundaries of St. Vincent and the Grenadines. Sea turtles are an important species in TCMP, and because t... Gazetted in 1997, The TCMP (Tobago Cays Marine Park) is the only marine protected area within the territorial boundaries of St. Vincent and the Grenadines. Sea turtles are an important species in TCMP, and because their globally endangered status have become the focus of an in-water monitoring program, primarily for green turtles (Chelonia mydas). Preliminary assessment indicated that the TCMP contains an important foraging aggregation of sub-adult green turtles. Since then two additional years of data has been collected; this data was analyzed to assess the health of the turtle population. The data also indicated that the weight was predictable according to carapace width and length and that the population is dominated by larger sub-adults. 展开更多
关键词 Green turtles marine protected area health indicator body size.
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On the optimal harvesting of size-structured population dynamics 被引量:6
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作者 LIU Yan CHENG Xiao-liang HE Ze-rong 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2013年第2期173-186,共14页
This work is concerned with a kind of optimal control problem for a size-structured biological population model.Well-posedness of the state system and an adjoint system are proved by means of Banach's fixed point the... This work is concerned with a kind of optimal control problem for a size-structured biological population model.Well-posedness of the state system and an adjoint system are proved by means of Banach's fixed point theorem.Existence and uniqueness of optimal control are shown by functional analytical approach.Optimality conditions describing the optimal strategy are established via tangent and normal cones technique.The results are of the first ones for this novel structure. 展开更多
关键词 body size population model optimal harvest maximum principle normal cone.
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基于BodyPix的非接触式人体测量 被引量:4
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作者 李科 毋涛 《国外电子测量技术》 2020年第7期89-93,共5页
人体测量技术是服装制造业中一个重要的环节,一种便捷、高效率、高精度的人体测量技术可为服装行业的制造提供数据基础。针对传统二维图像人体测量方法中过程繁琐、耗时等问题,提出将基于TensorFlowj.s的BodyPix应用到人体测量中的新思... 人体测量技术是服装制造业中一个重要的环节,一种便捷、高效率、高精度的人体测量技术可为服装行业的制造提供数据基础。针对传统二维图像人体测量方法中过程繁琐、耗时等问题,提出将基于TensorFlowj.s的BodyPix应用到人体测量中的新思路,在BodyPix分割工具获取到人体二维分割图像的基础上通过像素点扫描的方法把人体各部位的图像尺寸转换为真实尺寸,可以有效提高服装行业中在面对批量服装定制时量体的速度。实验结果中人体的围度误差在-0.969^+0.855,长度误差在-0.944^+0.723。有效提高了人体测量的精准性和测量速度,表明了将BodyPix应用到人体测量中的鲁棒性。 展开更多
关键词 bodyPix 非接触人体测量 二维图像 图像学尺寸 人体部位分割
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Beak Measurements of Octopus (Octopus variabilis) in Jiaozhou Bay and Their Use in Size and Biomass Estimation 被引量:2
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作者 XUE Ying REN Yiping +4 位作者 MENG Wenrong LI Long MAO Xia HAN Dongyan MA Qiuyun 《Journal of Ocean University of China》 SCIE CAS 2013年第3期469-476,共8页
Cephalopods play key roles in global marine ecosystems as both predators and preys.Regressive estimation of original size and weight of cephalopod from beak measurements is a powerful tool of interrogating the feeding... Cephalopods play key roles in global marine ecosystems as both predators and preys.Regressive estimation of original size and weight of cephalopod from beak measurements is a powerful tool of interrogating the feeding ecology of predators at higher trophic levels.In this study,regressive relationships among beak measurements and body length and weight were determined for an octopus species(Octopus variabilis),an important endemic cephalopod species in the northwest Pacific Ocean.A total of 193 individuals(63 males and 130 females) were collected at a monthly interval from Jiaozhou Bay,China.Regressive relationships among 6 beak measurements(upper hood length,UHL;upper crest length,UCL;lower hood length,LHL;lower crest length,LCL;and upper and lower beak weights) and mantle length(ML),total length(TL) and body weight(W) were determined.Results showed that the relationships between beak size and TL and beak size and ML were linearly regressive,while those between beak size and W fitted a power function model.LHL and UCL were the most useful measurements for estimating the size and biomass of O.variabilis.The relationships among beak measurements and body length(either ML or TL) were not significantly different between two sexes;while those among several beak measurements(UHL,LHL and LBW) and body weight(W) were sexually different.Since male individuals of this species have a slightly greater body weight distribution than female individuals,the body weight was not an appropriate measurement for estimating size and biomass,especially when the sex of individuals in the stomachs of predators was unknown.These relationships provided essential information for future use in size and biomass estimation of O.variabilis,as well as the estimation of predator/prey size ratios in the diet of top predators. 展开更多
关键词 Octopus variabilis Jiaozhou Bay beak measurement body size hood length crest length
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