國立虎尾科技大學 |

Comparison of Bias and Precision of Fin Rays, Otoliths, and Scales for Ageing Brook Trout (Salvelinus fontinalis), Brown Trout (Salmo trutta), and Rio Grande Cutthroat Trout (Oncorhynchus clarki virginalis).

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Comparison of Bias and Precision of Fin Rays, Otoliths, and Scales for Ageing Brook Trout (Salvelinus fontinalis), Brown Trout (Salmo trutta), and Rio Grande Cutthroat Trout (Oncorhynchus clarki virginalis)./
Author:	Parsley, Phillip Mark.
Description:	1 online resource (45 pages)
Notes:	Source: Masters Abstracts International, Volume: 56-04.
Subject:	Aquatic sciences. -
Online resource:	click for full text (PQDT)
ISBN:	9781369760521

Comparison of Bias and Precision of Fin Rays, Otoliths, and Scales for Ageing Brook Trout (Salvelinus fontinalis), Brown Trout (Salmo trutta), and Rio Grande Cutthroat Trout (Oncorhynchus clarki virginalis).
Parsley, Phillip Mark.

Comparison of Bias and Precision of Fin Rays, Otoliths, and Scales for Ageing Brook Trout (Salvelinus fontinalis), Brown Trout (Salmo trutta), and Rio Grande Cutthroat Trout (Oncorhynchus clarki virginalis). - 1 online resource (45 pages)

Source: Masters Abstracts International, Volume: 56-04.

Thesis (M.S.)--Middle Tennessee State University, 2017.

Includes bibliographical references

The precision, bias, and accuracy of age estimates from scales, pelvic fin rays, and otoliths were compared for Brook Trout ( Salvelinus fontinalis), Brown Trout (Salmo trutta), and Rio Grande Cutthroat Trout (Oncorhynchus clarki virginalis). Calcified structures were collected for each fish and age estimates were obtained by counting the number of annuli by two independent readers. The precision of age estimates was estimated by coefficient of variation (CV), and percent agreement (PA) between readers. Bias and accuracy were investigated through analysis of age-bias plots and Wilcoxon matched pairs rank tests. In all analyses, age estimates of Brook Trout, Brown Trout and the Rio Grande Cutthroat Trout were most precise using otoliths and fin rays. Typically, age estimates of otoliths and fin rays were more accurate than scales particularly for age classes > 4. Age estimates with scales typically underestimated the age of older fish whereas age estimates of fin rays and otoliths were closer in agreement. The differences of age estimates from fin rays, otoliths, and scales found in this study emphasize the importance of validating calcified structures for these species. Additionally, the accuracy and precision of age estimates from fin rays demonstrate that this method is a viable nonlethal alternative to the lethal sampling required for obtaining otoliths.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369760521Subjects--Topical Terms:

1178821
Aquatic sciences.
Index Terms--Genre/Form:

554714
Electronic books.

Comparison of Bias and Precision of Fin Rays, Otoliths, and Scales for Ageing Brook Trout (Salvelinus fontinalis), Brown Trout (Salmo trutta), and Rio Grande Cutthroat Trout (Oncorhynchus clarki virginalis).
LDR:02660ntm a2200325K 4500 001 913188
005 20180618102523.5
006 m o u
007 cr mn||||a|a||
008 190606s2017 xx obm 000 0 eng d
020 $a 9781369760521
035 $a (MiAaPQ)AAI10254549
035 $a (MiAaPQ)mtsu:10746
035 $a AAI10254549
040 $a MiAaPQ $b eng $c MiAaPQ
100 1 $a Parsley, Phillip Mark. $3 1185902
245 1 0 $a Comparison of Bias and Precision of Fin Rays, Otoliths, and Scales for Ageing Brook Trout (Salvelinus fontinalis), Brown Trout (Salmo trutta), and Rio Grande Cutthroat Trout (Oncorhynchus clarki virginalis).
264 0 $c 2017
300 $a 1 online resource (45 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 56-04.
500 $a Adviser: Sarah E. Bergemann.
502 $a Thesis (M.S.)--Middle Tennessee State University, 2017.
504 $a Includes bibliographical references
520 $a The precision, bias, and accuracy of age estimates from scales, pelvic fin rays, and otoliths were compared for Brook Trout ( Salvelinus fontinalis), Brown Trout (Salmo trutta), and Rio Grande Cutthroat Trout (Oncorhynchus clarki virginalis). Calcified structures were collected for each fish and age estimates were obtained by counting the number of annuli by two independent readers. The precision of age estimates was estimated by coefficient of variation (CV), and percent agreement (PA) between readers. Bias and accuracy were investigated through analysis of age-bias plots and Wilcoxon matched pairs rank tests. In all analyses, age estimates of Brook Trout, Brown Trout and the Rio Grande Cutthroat Trout were most precise using otoliths and fin rays. Typically, age estimates of otoliths and fin rays were more accurate than scales particularly for age classes > 4. Age estimates with scales typically underestimated the age of older fish whereas age estimates of fin rays and otoliths were closer in agreement. The differences of age estimates from fin rays, otoliths, and scales found in this study emphasize the importance of validating calcified structures for these species. Additionally, the accuracy and precision of age estimates from fin rays demonstrate that this method is a viable nonlethal alternative to the lethal sampling required for obtaining otoliths.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Aquatic sciences. $3 1178821
650 4 $a Zoology. $3 593903
655 7 $a Electronic books. $2 local $3 554714
690 $a 0792
690 $a 0472
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Middle Tennessee State University. $b Biology. $3 1180031
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10254549 $z click for full text (PQDT)