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Age determination and growth estimates of the white-spotted conger eel, Conger myriaster (Brevoort, 1856) in marine waters of South Korea

Age determination and growth estimates of the white-spotted conger eel, Conger myriaster (Brevoort, 1856) in marine waters of South Korea
Age determination and growth estimates of the white-spotted conger eel, Conger myriaster (Brevoort, 1856) in marine waters of South Korea
The age and growth of conger eel, Conger myriaster, were investigated by measuring transversely sectioned sagittal otoliths samples from 635 individuals. Sample ages ranged from 1 to 13 years in the female data. Parameters of the von Bertalanffy growth function were estimated using nonlinear regression from back-calculation, mean length of samples at age relationships, and otolith weight-at-age relationships. Best-fitting value of the three methods was the otolith weight-at-age relationship (r2 = .87). Parameters of otolith weight-at-age were estimated as L∞ = 143.76 cm, K = 0.081, and t0 = −1.285. Maximum oocyte diameter (MOD) ranged from 50 to 430 μm. Reproductive traits of ovaries showed a positive relationship between GSI and MOD (r2 = .8515). It is suggested that oogenesis begins to develop from 4 years of age and at lengths of about 45 cm TL. In conclusion, these data provide reliable fundamental data for the fish stock management of Conger myriaster in South Korea.
0175-8659
Bae, J.H.
df7754b6-ca7c-42fe-ab69-ef4b6e5c977e
Bae, H.J.
866c80d6-4ce6-439a-8b3a-229d0bcf4e88
Park, H.-M.
abde8f3a-aeda-40c1-ba70-385b988822a5
Park, H.-S.
7b09d319-8d35-430c-af03-e6f44e689bd3
Kim, H.-G.
d076978e-b593-4740-8708-62ea0e4dbc81
Oh, C.-W.
7869e618-c5b8-4da6-b74f-59d48133156c
Bae, J.H.
df7754b6-ca7c-42fe-ab69-ef4b6e5c977e
Bae, H.J.
866c80d6-4ce6-439a-8b3a-229d0bcf4e88
Park, H.-M.
abde8f3a-aeda-40c1-ba70-385b988822a5
Park, H.-S.
7b09d319-8d35-430c-af03-e6f44e689bd3
Kim, H.-G.
d076978e-b593-4740-8708-62ea0e4dbc81
Oh, C.-W.
7869e618-c5b8-4da6-b74f-59d48133156c

Bae, J.H., Bae, H.J., Park, H.-M., Park, H.-S., Kim, H.-G. and Oh, C.-W. (2017) Age determination and growth estimates of the white-spotted conger eel, Conger myriaster (Brevoort, 1856) in marine waters of South Korea. Journal of Applied Ichthyology. (doi:10.1111/jai.13587).

Record type: Article

Abstract

The age and growth of conger eel, Conger myriaster, were investigated by measuring transversely sectioned sagittal otoliths samples from 635 individuals. Sample ages ranged from 1 to 13 years in the female data. Parameters of the von Bertalanffy growth function were estimated using nonlinear regression from back-calculation, mean length of samples at age relationships, and otolith weight-at-age relationships. Best-fitting value of the three methods was the otolith weight-at-age relationship (r2 = .87). Parameters of otolith weight-at-age were estimated as L∞ = 143.76 cm, K = 0.081, and t0 = −1.285. Maximum oocyte diameter (MOD) ranged from 50 to 430 μm. Reproductive traits of ovaries showed a positive relationship between GSI and MOD (r2 = .8515). It is suggested that oogenesis begins to develop from 4 years of age and at lengths of about 45 cm TL. In conclusion, these data provide reliable fundamental data for the fish stock management of Conger myriaster in South Korea.

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More information

Accepted/In Press date: 2 July 2017
e-pub ahead of print date: 15 December 2017

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Local EPrints ID: 416815
URI: https://eprints.soton.ac.uk/id/eprint/416815
ISSN: 0175-8659
PURE UUID: 7afeb4e4-d9da-4d6d-b431-ed82678f37e1

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Date deposited: 11 Jan 2018 17:30
Last modified: 13 Mar 2019 19:01

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