为研究不同群体柔鱼(Ommastrephes bartramii)生长的异质性,文章根据2016—2018年在北太平洋采集的柔鱼样本,对该物种胴长和体质量的性别和月间差异进行了分析。构建了广义线性模型(Generalized linear model,GLM)和9个线性混合模型(Lin...为研究不同群体柔鱼(Ommastrephes bartramii)生长的异质性,文章根据2016—2018年在北太平洋采集的柔鱼样本,对该物种胴长和体质量的性别和月间差异进行了分析。构建了广义线性模型(Generalized linear model,GLM)和9个线性混合模型(Linear mixed model,LMM),用于研究不同群体柔鱼的胴长和体质量关系(m=aLb)在性别及时间上的差异。结果显示,东、西部群体不同性别柔鱼胴长、体质量均存在极显著差异(P<0.01);各月份间也均存在极显著差异(P<0.01)。东部群体异速生长参数(b)的固定值(2.7634)小于3,表示其为负异速增长,肥满度随胴长增加而减少,胴体趋于细长;西部群体b的固定值(3.11719)大于3,表示其为正异速增长,肥满度随胴长增加而增大,胴体趋于宽厚。研究表明,性别和月份对不同群体柔鱼胴长和体质量关系均有显著影响,线性混合模型能将性别和月份的异质性通过随机效应在单个模型中更准确、方便地体现出来,进一步证实了此模型在个体生长异质性研究中的优势。展开更多
根据2018年12月在日本海采集的舍氏贝乌贼(Berryteuthis magister shevtsovi)样本,对其形态特征、胴长与体质量、性腺成熟度、摄食强度与肥满度等生物学特征进行了研究。结果表明:舍氏贝乌贼的优势组胴长和体质量分别为100~120 mm和30~7...根据2018年12月在日本海采集的舍氏贝乌贼(Berryteuthis magister shevtsovi)样本,对其形态特征、胴长与体质量、性腺成熟度、摄食强度与肥满度等生物学特征进行了研究。结果表明:舍氏贝乌贼的优势组胴长和体质量分别为100~120 mm和30~70 g,鳍长与鳍宽的平均值为(58.36±5.81)mm和(90.44±6.89)mm;在体质量与胴长的关系中,条件因子a为0.0007,异速生长因子b为2.3934,胴长的增长速度快于其体质量的增加;性腺成熟度以I和II期个体为主;胴长小于110 mm时,摄食强度多以1~2级为主,胴长大于110 mm时,摄食强度为3~4级的个体占比上升;随着胴长的增加,个体肥满度呈现下降的趋势。研究结果可为后续研究其种群鉴定、生活史、资源开发和利用等提供参考。展开更多
Quantitative trait loci(QTL)were detected for 8 internal organ traits,3 carcass length traits,and teat number trait in 214 pigs in a resource population that included 180 F2 individuals.A total of 39 microsatellite ma...Quantitative trait loci(QTL)were detected for 8 internal organ traits,3 carcass length traits,and teat number trait in 214 pigs in a resource population that included 180 F2 individuals.A total of 39 microsatellite markers were examined on SSC4,SSC6,SSC7,SSC8,and SSC13.The genetic traits included heart weight(HW),lung weight(LW),liver and gallbladder weight(LGW),spleen weight(SPW),stomach weight(STW),small intestine weight(S1W),large intestine weight(LIW),kidney weight(KW),carcass length to the first cervical vertebra(CL1),carcass length to the first thoracic vertebra(CL2),rib numbers(RNS),and teat numbers(TNS).Results indicated that,3 highly significant QTL(P≤0.01 at chromosome-wise level)for HW(at 30 cM on SSC6),RNS(at 115 cM on SSC7),TNS(at 110 cM on SSC7),and 6 significant QTL(P≤0.05 at chromosome-wise level)for LW(at 119 cM on SSC13),LGW(at 94 cM on SSC6),SPW(at 106 cM on SSC8),SIW(0 cM on SSC4),LIW(170 cM on SSC 4),and TNS(at 95 cM on SSC6)were detected.The phenotypic variances for which these QTL were accounted ranged from 0.04%to 14.06%.Most of these QTL had not been previously reported.展开更多
Beak of cephalopod is an important hard tissue. Understanding the morphology of beak can yield critical infor- mation on the role of cephalopods in the ecosystem. The south patagonic stock of the Argentine shortfin sq...Beak of cephalopod is an important hard tissue. Understanding the morphology of beak can yield critical infor- mation on the role of cephalopods in the ecosystem. The south patagonic stock of the Argentine shortfin squid, Illex argentinus, is not only one of the most important fishing targets, but also one of the most important species in the marine eco-system of the southwest Atlantic. A total of 430 samples ofL argentinus, including 229 females 103-346mm in mantle length （ML） and 201 males 140-298mm in ML, were collected from the area off the Exclusive Economic Zone of Argentinean waters by Chinese squid jigging vessels during February to May 2007. The morphology of their beaks was evaluated. The relationships between beak morphological variables and ML differed significantly among males and females. They could be best described by loga- rithmic functions for females and linear functions for males except for upper wing length （UWL） and lower rostrum length （LRL）, which followed exponential functions in their relationships with ML. The results showed the sexual dimorphism in the relationship between ML and beak morphology for the south patagonic stock ofL argentinus. However, no significant differ- ence was found between males and females in the relationships of beak morphological variables （except for UWL） versus body weight （BW）, suggesting that the relationship between beak morphological variables and BW can be used for estimating the biomass consumed by their predators.展开更多
基金国家自然科学基金项目(NSFC41276156)上海市科技创新行动计划(12231203900)+3 种基金国家发改委产业化专项(2159999)国家远洋渔业工程技术研究中心(National Distant-water Fisheries Engineering Research Center)和农业部大洋渔业资源环境科学观测实验站(Scientific Observing and Experimental Station of Oceanic Fishery ResourcesMinistry of AgricultureChina)的资助
基金supported by the State Key Basic Research and Development Plan of China(No.2006CB102102)the National Natural Science Foundation of China(No.30500358).
文摘Quantitative trait loci(QTL)were detected for 8 internal organ traits,3 carcass length traits,and teat number trait in 214 pigs in a resource population that included 180 F2 individuals.A total of 39 microsatellite markers were examined on SSC4,SSC6,SSC7,SSC8,and SSC13.The genetic traits included heart weight(HW),lung weight(LW),liver and gallbladder weight(LGW),spleen weight(SPW),stomach weight(STW),small intestine weight(S1W),large intestine weight(LIW),kidney weight(KW),carcass length to the first cervical vertebra(CL1),carcass length to the first thoracic vertebra(CL2),rib numbers(RNS),and teat numbers(TNS).Results indicated that,3 highly significant QTL(P≤0.01 at chromosome-wise level)for HW(at 30 cM on SSC6),RNS(at 115 cM on SSC7),TNS(at 110 cM on SSC7),and 6 significant QTL(P≤0.05 at chromosome-wise level)for LW(at 119 cM on SSC13),LGW(at 94 cM on SSC6),SPW(at 106 cM on SSC8),SIW(0 cM on SSC4),LIW(170 cM on SSC 4),and TNS(at 95 cM on SSC6)were detected.The phenotypic variances for which these QTL were accounted ranged from 0.04%to 14.06%.Most of these QTL had not been previously reported.
基金funded by National Science Foundation of China (NSFC41276156)sponsored by Program of Shanghai Subject Chief Scientist (10XD-1402000)+3 种基金Foundation of Doctorate Programs of Ministry of Education of China (20093104110002)Shanghai Leading Academic Discipline Project (Fisheries Discipline)Y. Chen’s involvement in the project was supported by the Shanghai Dongfang Scholar ProgramSupports from Xinshiji No. 52 for the scientific survey are gratefully acknowledged
文摘Beak of cephalopod is an important hard tissue. Understanding the morphology of beak can yield critical infor- mation on the role of cephalopods in the ecosystem. The south patagonic stock of the Argentine shortfin squid, Illex argentinus, is not only one of the most important fishing targets, but also one of the most important species in the marine eco-system of the southwest Atlantic. A total of 430 samples ofL argentinus, including 229 females 103-346mm in mantle length （ML） and 201 males 140-298mm in ML, were collected from the area off the Exclusive Economic Zone of Argentinean waters by Chinese squid jigging vessels during February to May 2007. The morphology of their beaks was evaluated. The relationships between beak morphological variables and ML differed significantly among males and females. They could be best described by loga- rithmic functions for females and linear functions for males except for upper wing length （UWL） and lower rostrum length （LRL）, which followed exponential functions in their relationships with ML. The results showed the sexual dimorphism in the relationship between ML and beak morphology for the south patagonic stock ofL argentinus. However, no significant differ- ence was found between males and females in the relationships of beak morphological variables （except for UWL） versus body weight （BW）, suggesting that the relationship between beak morphological variables and BW can be used for estimating the biomass consumed by their predators.
