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Age and growth of filefish, Thamnaconus modestus (Günther, 1877) off the Jeju Island of Korea

Age and growth of filefish, Thamnaconus modestus (Günther, 1877) off the Jeju Island of Korea
Age and growth of filefish, Thamnaconus modestus (Günther, 1877) off the Jeju Island of Korea
The age and growth of filefish, Thamnaconus modestus (Günther 1877) in the southern waters of Korea were investigated. Samples were collected with commercial trawl catches during the period from May 2009 to December 2011. Of the 2,626 specimens collected, the sex ratio was not significantly different from 1:1 (P > 0.05). The total length ranged from 11.3 to 42.1 cm. The gonadosomatic index for both sexes was the highest in May to June, indicating that May to June is the main spawning period. The length of females at sexual maturity was 25.92 cm. The length-weight relationship of the filefish was TW = 0.0121TL3.0536 (n = 1,692, r2 = 0.9034, P < 0.001). The age of the sampled individuals was estimated by counting growth rings recorded on the 5th vertebrae; ages ranged from 0 to 9 years. The filefish of the same age displayed a high individual variation in total length. Length-at-age data were fitted by using the Von Bertalanffy growth model. The estimated Von Bertalanffy growth parameters were L? = 42.04 cm, k = 0.21 year?1 and t0 = ?1.56 for females, L? = 41.20 cm, k = 0.18 year?1 and t0 = ?2.36 for males, and L? = 43.16 cm, k = 0.17 year?1 and t0 = ?2.18 for the combination of both male and female. These data can be used as useful biological information for the future fishery management of filefish resources in Korean waters.
Thamnaconus modestus, filefish, vertebrate, Von Bertalanffy
1738-5261
355-362
Kim, AhReum
aed58972-1a9d-4ae0-b542-96c0bd6df3cc
Bae, HoJin
01fc109a-b630-40ca-978c-f3344dc8af84
Kim, Hyeong-Gi
d076978e-b593-4740-8708-62ea0e4dbc81
Oh, Chul-Woong
7869e618-c5b8-4da6-b74f-59d48133156c
Kim, AhReum
aed58972-1a9d-4ae0-b542-96c0bd6df3cc
Bae, HoJin
01fc109a-b630-40ca-978c-f3344dc8af84
Kim, Hyeong-Gi
d076978e-b593-4740-8708-62ea0e4dbc81
Oh, Chul-Woong
7869e618-c5b8-4da6-b74f-59d48133156c

Kim, AhReum, Bae, HoJin, Kim, Hyeong-Gi and Oh, Chul-Woong (2016) Age and growth of filefish, Thamnaconus modestus (Günther, 1877) off the Jeju Island of Korea. Ocean Science Journal, 51 (3), 355-362. (doi:10.1007/s12601-016-0031-y).

Record type: Article

Abstract

The age and growth of filefish, Thamnaconus modestus (Günther 1877) in the southern waters of Korea were investigated. Samples were collected with commercial trawl catches during the period from May 2009 to December 2011. Of the 2,626 specimens collected, the sex ratio was not significantly different from 1:1 (P > 0.05). The total length ranged from 11.3 to 42.1 cm. The gonadosomatic index for both sexes was the highest in May to June, indicating that May to June is the main spawning period. The length of females at sexual maturity was 25.92 cm. The length-weight relationship of the filefish was TW = 0.0121TL3.0536 (n = 1,692, r2 = 0.9034, P < 0.001). The age of the sampled individuals was estimated by counting growth rings recorded on the 5th vertebrae; ages ranged from 0 to 9 years. The filefish of the same age displayed a high individual variation in total length. Length-at-age data were fitted by using the Von Bertalanffy growth model. The estimated Von Bertalanffy growth parameters were L? = 42.04 cm, k = 0.21 year?1 and t0 = ?1.56 for females, L? = 41.20 cm, k = 0.18 year?1 and t0 = ?2.36 for males, and L? = 43.16 cm, k = 0.17 year?1 and t0 = ?2.18 for the combination of both male and female. These data can be used as useful biological information for the future fishery management of filefish resources in Korean waters.

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More information

Accepted/In Press date: 8 June 2016
e-pub ahead of print date: 13 October 2016
Keywords: Thamnaconus modestus, filefish, vertebrate, Von Bertalanffy
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 402986
URI: http://eprints.soton.ac.uk/id/eprint/402986
ISSN: 1738-5261
PURE UUID: 65b00e91-4f39-4228-8f2d-a09f8d67c625

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Date deposited: 16 Nov 2016 11:04
Last modified: 15 Mar 2024 03:31

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Contributors

Author: AhReum Kim
Author: HoJin Bae
Author: Hyeong-Gi Kim
Author: Chul-Woong Oh

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