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Age and growth of Schizopygopsis younghusbandi younghusbandi in the Yarlung Zangbo River in Tibet, China
Chen, Feng1,2; Chen, Yifeng1; He, Dekui1,2; Chen, YF, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2009-09-01
Source PublicationENVIRONMENTAL BIOLOGY OF FISHES
ISSN0378-1909
Volume86Issue:1Pages:155-162
AbstractSchizopygopsis younghusbandi younghusbandi is an endemic species whose distribution is restricted to the middle reaches of the Yarlung Zangbo River, being one of the most important commercial fishes in this area. Age and growth of 606 specimens captured between October 2002 and April 2005 were studied. The range in standard length (L) was 65.7-387.3 mm and total weight (W) was 3.3-772.0 g. The relationship between L and W was W=0.000909L(2.2493) for males and W=0.000259L(2.4781) for females. Age, determined from anal scales and lapillus otoliths, ranged from 3 to 18 years. The parameters of von Bertalanffy growth functions, estimated by back-calculated length, were L-infinity = 442.7mm L, k=0.0738 year(-1) and t(0)=-1.4 year for males, and L-infinity = 471.4mm L, k=0.0789 year(-1) and t(0)=0.2 year for females. Males and females exhibited statistically significant differences in growth. chi(2)-test indicated that von Bertalanffy growth functions could well describe the growth of S. y. younghusbandi. The longevities were 39.2 and 38.2 years for males and females, respectively. Growth inflexion points were 10.2 and 12.0 years for males and females, respectively, but 84.8% of the captures were at the smaller ages. So conservation and management schemes for this population should be considered urgently. In addition, we found that populations from the upstream of the Lhasa River, the downstream of the Lhasa River and the middle reaches of the Yarlung Zangbo River showed statistically significant differences in growth patterns.; Schizopygopsis younghusbandi younghusbandi is an endemic species whose distribution is restricted to the middle reaches of the Yarlung Zangbo River, being one of the most important commercial fishes in this area. Age and growth of 606 specimens captured between October 2002 and April 2005 were studied. The range in standard length (L) was 65.7-387.3 mm and total weight (W) was 3.3-772.0 g. The relationship between L and W was W=0.000909L(2.2493) for males and W=0.000259L(2.4781) for females. Age, determined from anal scales and lapillus otoliths, ranged from 3 to 18 years. The parameters of von Bertalanffy growth functions, estimated by back-calculated length, were L(infinity) = 442.7mm L, k=0.0738 year(-1) and t(0)=-1.4 year for males, and L(infinity) = 471.4mm L, k=0.0789 year(-1) and t(0)=0.2 year for females. Males and females exhibited statistically significant differences in growth. chi(2)-test indicated that von Bertalanffy growth functions could well describe the growth of S. y. younghusbandi. The longevities were 39.2 and 38.2 years for males and females, respectively. Growth inflexion points were 10.2 and 12.0 years for males and females, respectively, but 84.8% of the captures were at the smaller ages. So conservation and management schemes for this population should be considered urgently. In addition, we found that populations from the upstream of the Lhasa River, the downstream of the Lhasa River and the middle reaches of the Yarlung Zangbo River showed statistically significant differences in growth patterns.
SubtypeArticle
KeywordSchizopygopsis Younghusbandi Younghusbandi Age Growth Otolith Anal Scale Tibet
Department[Chen, Feng; Chen, Yifeng; He, Dekui] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Chen, Feng; He, Dekui] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Subject AreaEcology ; Marine & Freshwater Biology
DOI10.1007/s10641-008-9370-6
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Funding OrganizationChinese Academy of Sciences [KSCX2-SW-125, KSCX1-SW-13-04]; National Natural Science Foundation of China [30471345] ; Chinese Academy of Sciences [KSCX2-SW-125, KSCX1-SW-13-04]; National Natural Science Foundation of China [30471345] ; Chinese Academy of Sciences [KSCX2-SW-125, KSCX1-SW-13-04]; National Natural Science Foundation of China [30471345] ; Chinese Academy of Sciences [KSCX2-SW-125, KSCX1-SW-13-04]; National Natural Science Foundation of China [30471345]
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology ; Marine & Freshwater Biology
WOS SubjectEcology ; Marine & Freshwater Biology
WOS IDWOS:000271264000023
Funding OrganizationChinese Academy of Sciences [KSCX2-SW-125, KSCX1-SW-13-04]; National Natural Science Foundation of China [30471345] ; Chinese Academy of Sciences [KSCX2-SW-125, KSCX1-SW-13-04]; National Natural Science Foundation of China [30471345] ; Chinese Academy of Sciences [KSCX2-SW-125, KSCX1-SW-13-04]; National Natural Science Foundation of China [30471345] ; Chinese Academy of Sciences [KSCX2-SW-125, KSCX1-SW-13-04]; National Natural Science Foundation of China [30471345]
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/7522
Collection期刊论文
Corresponding AuthorChen, YF, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Chen, Feng,Chen, Yifeng,He, Dekui,et al. Age and growth of Schizopygopsis younghusbandi younghusbandi in the Yarlung Zangbo River in Tibet, China[J]. ENVIRONMENTAL BIOLOGY OF FISHES,2009,86(1):155-162.
APA Chen, Feng,Chen, Yifeng,He, Dekui,&Chen, YF, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.(2009).Age and growth of Schizopygopsis younghusbandi younghusbandi in the Yarlung Zangbo River in Tibet, China.ENVIRONMENTAL BIOLOGY OF FISHES,86(1),155-162.
MLA Chen, Feng,et al."Age and growth of Schizopygopsis younghusbandi younghusbandi in the Yarlung Zangbo River in Tibet, China".ENVIRONMENTAL BIOLOGY OF FISHES 86.1(2009):155-162.
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