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1.
鉴定和描述了驼背鲈鳞片的年龄及其年轮特征,采用4种生长模型来模拟其体长生长过程,通过比较分析得出最适的生长方程,并对其生长拐点以及生长指标等生长特征进行了相应的分析。实验结果表明,驼背鲈鳞片的年轮特征主要表现为疏密型,偶见副轮和生殖轮。von Bertalanffy 生长方程、Gompertz生长方程、Logistic生长方程以及三项式方程均可反映驼背鲈的体长生长过程,其生长特点属于均匀生长类型,其中Gompertz生长方程能更好地描述10龄以前的体长生长性状。体长体重的von Bertalanffy 生长方程为:Lt=566.0139[1-e-0.1549(t+1.0988)];Wt=4531.0076[1-e-0.1641(t+0.76635)]3.0245。体长与体重关系为 Wt=2.3×10-5Lt3.0245。渐近体长L∞=566.0139mm,渐近体重W∞=4531.0076g,体重生长拐点tr=5.98龄,此时的体长与体重分别为376.94mm和1346.26g。  相似文献   

2.
厚颌鲂的年龄结构及生长特性   总被引:8,自引:0,他引:8  
以鳞片作为鉴定年龄的材料,对龙溪河厚颌鲂(Megalobrama pellegrini)种群开展年龄结构与生长特性的研究。结果表明,厚颌鲂鳞片年轮结构呈疏密切割型,年轮特征显著,可用于年龄鉴定,3~4月是年轮形成高峰时间。种群由0~7龄共8个龄组组成,以低龄个体为主,1~3龄个体占83.14%,体长分布主要集中在130~250 mm间(77.71%)。体质量分布主要集中在50~250 g(64.33%)。群体总性比为♀∶♂=1∶1.03,符合1∶1理论比值。体长和鳞径呈直线关系,体长和体质量呈幂函数关系且幂指数接近3,属于匀速生长类型,因此用Von Bertalanffy方程描述其生长特性,相关生长参数分别为:渐近体长L∞=488.89 mm,渐近体质量W∞=2486.96 g,k=0.1648,t0=-0.5453龄。体质量生长拐点Ti=6.40龄,对应体长、体质量分别为Lt=333.14 mm,Wt=746.06 g。厚颌鲂的总体生长性能逊于同属其他鱼类。  相似文献   

3.
以鳞片作为鉴定年龄的材料,对澄湖似刺鳊(鱼句)(Paracanthobrama guichenoti)种群开展鳞片与生长特征的研究.结果表明,似刺鳊(鱼句)年轮环纹呈疏密切割或疏密碎裂型,年轮特征显著,偶见幼轮、副轮及生殖痕.种群由1~6龄共6个龄组组成,2~4龄为优势龄组,占总数的80.17%,体长分布范围在14~29.8 cm之间,集中在19~23 cm(占总数的71.49%),体质量范围在56~538.1 g之间,其中体质量为149~242 g的个体占样本总数的67.36%;群体雌雄比为2.18:1,在低龄阶段(1~2龄)雌雄数量基本持平,雄性略占优势;从5龄开始,雌性数量远超出同龄组雄性,6龄以上基本由雌性构成.各龄组雌、雄生长不存在显著性差异(P>0.05).体长与鳞径呈幂函数关系,体质量和体长的幂函数方程为:W=0.0128L3.1587,幂指数接近3,属于匀速生长类型,拟合Von Bertalanffy生长方程为:Lt=30.62(1-e-0.1578(t+3.7887);W=632.49(1-e-0.1578(t+3.7887)3.1587.渐近体长L∞=30.62 cm,渐近体质量W∞=632.49 g,生长拐点时间t=3.55龄,此时的体长和体质量分别为Lt=20.99 cm,Wt=192.24 g.澄湖似刺鳊(鱼句)的总体生长性能优于其他生境种群.  相似文献   

4.
采用鳞片材料对采自长江干流宜昌和重庆江段圆口铜鱼(Coreius guichenoti)的年龄进行鉴定,并对其生长方程、生长拐点等生物学特征进行了研究。结果表明,调查江段圆口铜鱼的年龄组成以1、2龄个体为主;体长(L)和鳞径(R)呈线性关系,L=15.327R+71.349;体重(W)与体长(L)呈幂指数关系,W=0.00002L2.9942;体长von Bertalanfy生长方程为Lt=730.15[1-e-0.12(t+1.01)];体重生长方程为Wt=7493.05[1-e-0.12(t+1.01)]2.9942;其生长拐点年龄为8.13龄。圆口铜鱼体长生长3龄前为快速期,之后生长减缓。为了保护长江干流圆口铜鱼资源,建议以278mm为最小捕捞个体的体长。  相似文献   

5.
对额尔齐斯河白斑狗鱼和黑龙江黑斑狗鱼的种群结构和生长特性进行比较研究。结果表明,白斑狗鱼由10个年龄组组成,体长与体重的关系式为W=2×10-5L2.9006,生长方程为Lt=1085.49(1-e-0.1372(t+0.60387)),Wt=12658.26(1-e-0.1372(t+0.60387))3,生长拐点为7.42龄,拐点体重为3750.60g,其在8龄前能维持较快速的生长;黑斑狗鱼由7个年龄组组成,体长与体重的关系式分别为W=4×10-6L3.1367,生长方程为Lt=1588(1-e-0.1119(t+0.46587)),Wt=43870.1(1-e-0.111(9t+0.46587))3,生长拐点为9.35龄,拐点体重为12998.55g,其在10龄前能维持较快速的生长:同时探讨2种狗鱼生态学参数的地理差异。鉴于2种狗鱼的资源现状,建议应加强对4+~7+龄个体的保护。  相似文献   

6.
以鳞片作为年龄鉴定材料,对长江上游特有鱼类张氏(Hemiculter tchangi Fang)种群的年龄结构和生长特性进行了研究。结果表明:张氏鳞片的年轮结构呈疏密切割型,2~3月是年轮形成最多的月份。其渔获物由1~4龄组成,其中857尾为1~2龄,占总数的83.84%;雌∶雄性比为1.07∶1,符合1∶1理论比值(X2=0.754,P>0.05,n=1001),随着年龄的增长呈雌鱼多于雄鱼的趋势。体长主要分布在81~180 mm(94.9%),体重主要分布在2.9~50.0 g(67.69%)。体长和鳞径呈直线关系,体长和体重呈幂函数关系且幂指数接近3,属于匀速生长类型,生长方程为Lt=196.05(1-e-0.36(t+1.26));Wt=97.195(1-e-0.36(t+1.26))3.145,拐点年龄为1.92龄,相应的体长体重分别为133.5 mm、29.13 g。  相似文献   

7.
以鳞片作为鉴定年龄的材料,对澄湖似刺鳊鮈(Paracanthobrama guichenoti)种群开展鳞片与生长特征的研究。结果表明,似刺鳊鮈年轮环纹呈疏密切割或疏密碎裂型,年轮特征显著,偶见幼轮、副轮及生殖痕。种群由1-6龄共6个龄组组成,2-4龄为优势龄组,占总数的80.17%,体长分布范围在14-29.8 cm之间,集中在19-23 cm(占总数的71.49%),体质量范围在56-538.1 g之间,其中体质量为149-242 g的个体占样本总数的67.36%;群体雌雄比为2.18∶1,在低龄阶段(1-2龄)雌雄数量基本持平,雄性略占优势;从5龄开始,雌性数量远超出同龄组雄性,6龄以上基本由雌性构成。各龄组雌、雄生长不存在显著性差异(P〉0.05)。体长与鳞径呈幂函数关系,体质量和体长的幂函数方程为:W=0.0128L^3.1587,幂指数接近3,属于匀速生长类型,拟合Von Bertalanffy生长方程为:Lt =30.62(1-e^-0.1578(t+3.788 7));Wt =632.49(1-e^-0.1578(t+3.7887))^3.1587。渐近体长L∞=30.62 cm,渐近体质量W∞=632.49 g,生长拐点时间t=3.55龄,此时的体长和体质量分别为Lt=20.99 cm,Wt=192.24 g。澄湖似刺鳊鮈的总体生长性能优于其他生境种群。  相似文献   

8.
大宁河红尾副鳅年龄与生长的研究   总被引:2,自引:1,他引:1  
利用耳石、脊椎骨对2006年10月至2007年11月采自大宁河的129尾红尾副鳅(Paracobitis variegates)的年轮特征进行研究,并对生长情况进行分析。结果显示:低龄脊椎骨钙质沉积不明显,轮纹观察不清楚,耳石轮纹较清楚。红尾副鳅群体由2~6龄共5个龄组组成,体重体长关系为W=1.95×10-4L2.309,耳石直径与体长的关系为L=263.24R+9.03,生长方程为Lt=222.708[1-e-0.092(t+2.162)];Wt=51.399[1-e-0.092(t+2.162)]2.309。结果表明:红尾副鳅体重生长拐点年龄为6.97龄,7龄前后为合理的捕捞时期。  相似文献   

9.
长江干流圆口铜鱼的年龄与生长研究   总被引:1,自引:0,他引:1  
采用鳞片材料对采自长江干流宜昌和重庆江段圆口铜鱼(Coreius guichenoti)的年龄进行鉴定,并对其生长方程、生长拐点等生物学特征进行了研究。结果表明,调查江段圆口铜鱼的年龄组成以1、2龄个体为主;体长(L)和鳞径(R)呈线性关系,L=15.327R+71.349;体重(W)与体长(L)呈幂指数关系,W=0.00002L2.9942;体长von Bertalanfy生长方程为Lt=730.15[1-e-0.12(t+1.01)];体重生长方程为Wt=7493.05[1-e-0.12(t+1.01)]2.9942;其生长拐点年龄为8.13龄。圆口铜鱼体长生长3龄前为快速期,之后生长减缓。为了保护长江干流圆口铜鱼资源,建议以278mm为最小捕捞个体的体长。  相似文献   

10.
黑尾近红鲌在人工养殖条件下的生长   总被引:4,自引:0,他引:4  
研究了养殖条件下黑尾近红鲌的生长规律,结果表明:体长(L)与鳞径(R)呈直线相关L=6.4355R+3.4337(r=0.9983);体重(W)与体长(L)呈指数函数关系 W=0.0093L3.2546(r=0.9921).应用各龄逆算体长、体重均值,求得生长方程Lt=45.9643[1-e-0.3238(1+1.2687)],Wt=2393.2495[1-e-0.3238(1+1.2687)]3.2546.体重生长曲线的拐点tt=2.38龄,拐点处的体长为Lt=31.86锄,体重为Wt=726.18g.根据生长指数分析得出1~2龄的黑尾近红鲌体长、体重生长最快.  相似文献   

11.
A new concept related to growth coefficient   总被引:1,自引:0,他引:1  
SAKUTARO  YAMADA 《Fisheries Science》2002,68(6):1250-1253
ABSTRACT: Although the notion of growth coefficient is important in growth analysis, its meaning is not necessarily pointed out clearly, at least analytically. The present paper, based on the von Bertalanffy model, gives an extended quantity of it and investigates its properties for logistic and Gompertz models. It is age dependent and converges to the coefficient of age in the models, growth coefficient in the traditional sense. The graphs of the quantity and the length show similarity for the logistic model, but not for the Gompertz model, although they show the same type of fluctuation. Moreover, the analysis indicates that the newly defined quantity has a property suitable to be called a growth density of the growth of length. Our discussion also shows the importance of the notion of growth remainder.  相似文献   

12.
该研究对海南新村港养殖17个月的企鹅珍珠贝(Pteria penguin)苗种生长性状进行测量,利用von Bertalanffy、Gompertz和Logistic 3种生长模型对其生长性状的增长规律进行拟合,通过Levenberg-Marquardt迭代法求出各模型中3个生长参数,综合各参数的最优值,得出不同生长性状拟合效果最佳的生长模型。结果表明,Gompertz模型为企鹅珍珠贝各生长性状的最优生长模型。根据生长参数得出壳长、壳高、壳宽和体质量的生长极限值分别为93.519 mm、90.641 mm、39.075 mm和157.755 g,生长拐点分别为2.86个月、4.04个月、5.63个月和9.61个月;各生长性状间的绝对生长速度在不同生长期内差异较大,但随着月龄的增大均呈现先增加后降低的趋势;性状间相对生长速度存在差异并随月龄的增长逐渐趋于0。研究结果可为企鹅珍珠贝的养殖生态研究、遗传育种及插核育珠提供理论依据和参考资料。  相似文献   

13.
孙颖 《水产学报》2006,30(6):740-746
家蚕多角体病毒表达系统在家蚕体内表达基因重组的草鱼生长激素(r-gGH),具有与天然草鱼生长激素(GH)相似的免疫原性和生物活性。为了节省基因工程研究中的下游工作 (基因产物的分离和提纯),本研究将含有r-gGH的家蚕直接作为饵料源,冻干并磨碎后拌在饵料中投喂草鱼鱼种,通过养殖实验及生化测定分析对比r-gGH促进草鱼鱼种生长的剂量依存关系,筛选活性强的处理剂量和处理时间,期望为鱼类养殖生产提供一种较为经济、来源容易、方法简易而又切实可行的促进鱼种生长并且可以大规模应用的方式。实验结果表明,投喂含有r-gGH的家蚕,有相当一部分被鱼体消化道吸收,进入血液循环。投喂2 h和6 h 后,草鱼鱼种的血清GH水平均显著高于对照组(投喂基本饲料)和投喂正常家蚕组;每天投喂和隔2天投喂,均使草鱼鱼种的血清GH水平显著升高,并对草鱼鱼种生长都有明显的促进作用。短期(3 d)和长期(42 d)投喂含有r-gGH 的家蚕,无论是低剂量(10 mg·g-1饲料)还是高剂量(20 mg·g-1饲料),均极其显著地提高草鱼鱼种的血清GH水平;长期(42 d)投喂亦对草鱼鱼种的生长有显著的促进作用,鱼体的相对体重增长率、相对体长增长率、食物转化率和肥满度显著增加。  相似文献   

14.
The wide range of sizes of sexually mature prawn populations and particularly of the males is very typical of Macrobrachium rosenbergii (De Man) and a major obstacle to increased profitability of prawn culture. Prawn size variation reflects a complex population structure composed of three major male morphotypes – the small males, the orange‐claw males and the blue‐claw males – which differ in their morphology, physiology and behaviour. Social interactions among juveniles and among sexually mature males affect their growth. Four different social mechanisms have been suggested to control growth in crustaceans: direct competition for food, appetite suppression, altered food‐conversion efficiency and increased energy expenditure on motor activity. Since all growth‐controlling mechanisms involve an aggressive behavioural component, our knowledge of prawn agonistic behaviour and prawn social organization has been reviewed. Present knowledge of the social mechanisms regulating growth among juveniles and among sexually mature male morphotypes as well as the sensory modalities involved was evaluated. The possible evolution of social growth‐controlling mechanisms is discussed. Various ways for implementing our knowledge on social control of growth into prawn culture to increase profitability are suggested.  相似文献   

15.
A synthetic enkephalin analog (Tyr-D-Trp-Ala-D-Phe-NH2) was administered to juvenile hybrid tilapia (Tilapia nilotica ×T. aurea) by immersing the fish for 15 minutes per week into one of two doses of the hormone for 8 weeks. Growth, food conversion efficiency, body weight, specific growth rate, food conversion efficiency and feed consumption were all significantly increased as a result of enkephalin treatment. The low dose (10µg/100 ml water) of enkephalin analog had a better stimulation effect than that of the high dose (100µg/100 ml water). Liver protein and protein/DNA ratio were higher in both treatment groups than in the control group. Tissue-body indices and muscle proximate composition were similar in the treatment and control groups. The growth stimulation in fish treated with the enkephalin analog was possibly mediated by an increase in growth hormone secretion.  相似文献   

16.
胰岛素样生长因子与动物性状的相关性研究   总被引:1,自引:0,他引:1  
梁艳  李学伟 《畜禽业》2006,(12):6-9
胰岛素样生长因子(insulin-likegrowthfactors,IGFs)是生长激素促生长作用的主要介导因子,通过对IGF-I和IGF-II及其对动物相关性状影响的系统分析,进一步揭示了其在动物的生长发育过程中发挥的重要作用。  相似文献   

17.
Abstract  Standard methods for comparing population characteristics within and among fish populations greatly enhance communications among fisheries scientists, improve the efficiency of data analysis, and provide insight that helps guide management actions. Although standard methods are available for comparing some fish population characteristics (e.g. length structure, body condition), similar methods are lacking for comparing growth. The purpose of this study was to provide standards (i.e. percentiles and a standard growth model) for nine ecologically and recreationally important fish species. Percentile distributions of mean back-calculated length at age were estimated using data obtained from the published literature and from data solicited from state and federal agencies throughout North America. Percentiles of growth were estimated for bluegill, Lepomis macrochirus Rafinesque, common carp, Cyprinus carpio Linnaeus, flathead catfish, Pylodictis olivaris (Rafinesque), largemouth bass, Micropterus salmoides (Lacepède), sauger, Sander canadensis (Griffith & Smith), smallmouth bass, Micropterus dolomieu Lacepède, white bass, Morone chrysops (Rafinesque) and yellow perch, Perca flavescens (Mitchill). Standard growth models (i.e. von Bertalanffy models) were developed for these species and for channel catfish, Ictalurus punctatus (Rafinesque). These results provide tools that will help scientists compare growth of fishes across North America.  相似文献   

18.
19.
庄虔增 《齐鲁渔业》1994,11(1):9-12
对采自黄渤海沿岩的鲻样品进行了生物学测定,研究了鲻的两性生长,相对增长率,生长指标,生长参数,生长速度和加速度。  相似文献   

20.
Size‐dependent growth (SDG) is an important process in structuring populations as well as determining life history outcomes. Despite its importance, there have been few investigations from observational studies focusing on the interaction between life history decisions and SDG. In this study, we used data on individually tagged Atlantic salmon from both the laboratory and the field to investigate differences in SDG among two life history groups, parr and smolts. In the laboratory, we found little evidence of SDG in parr but seasonally dependent SDG in the smolt group. Smolts showed at strong compensatory response over the winter months just prior to the smolt transformation window. In the field, we found little evidence of SDG early in ontogeny (i.e., age 0+ fall and winter). There was some evidence of depensatory growth (positive SDG) during the age 1+ spring among both life history groups that may reflect random habitat variation or the monopolisation of resources. After the age 1+ spring, we found that smolts were more likely to show a compensatory effect (negative SDG) than parr. This effect was strongest, as they approached the smolt window in the spring of their age 2+ year. These results suggest (i) SDG is common in Atlantic salmon; however, the form and extent of life history depends on (ii) season and (iii) life history. For individuals that adopt a smolt life history, trade‐offs between freshwater survival and sea survival may lead to a convergent growth pattern, as they approach the smolt migration window.  相似文献   

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