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Record #186046:

Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica / C.P. Sutton, and 3 others.

Title: Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica / C.P. Sutton, and 3 others.
Author(s): Sutton, C. P.
Date: 2008.
In: CCAMLR Science. (2008.), Vol. 15 (2008)
Abstract: Presents biological data from 303 specimens of Channichthyidae collected during 2005-06 Ross Sea toothfish fishing season. All specimens were identified as Chionobathyscus dewitti and showed no significant difference in sex ratio, and meristic, diet and age data were consistent with previous research. Gonad maturity stage data showed that most fish were either immature or resting (mature). Gonadosomatic indices (GSIs) plotted against sample month showed weak positive trend in GSI between December and February, though this was limited, probably due to short temporal distribution of data. Length-at-maturity and age-at-maturity ogives indicated that 50% of fish sampled were mature at about 340-360 mm total length (TL) and about 3-4 years of age, and that 95% were mature at about 370-400 mm TL and 6-8 years of age. Counts of growth zones in sectioned otoliths were used to determine ages and von Bertalanffy growth parameters. Growth was rapid for both sexes, and females approached significantly larger mean asymptotic maximum size than males. Maximum ages of 8 and 11 years were obtained for male and female fish respectively. Diet analysis showed most icefish stomachs were empty, with few prey items recovered generally in advanced stages of digestion, though this may be due to regurgitation of prey during capture.
Notes:

CCAMLR Science. Vol. 15 :139-165 (2008).

Keywords: 597 -- Fish.
597.583.1 -- Nototheniiformes.
597.583.15 -- Channichthyidae: Chionobathyscus dewitti.
591.1 -- Animal physiology.
591.134 -- Animal growth.
591.134.2 -- Animals, rate of growth.
591.139 -- Animals, ageing.
59.087 -- Age determination, zoology.
591.16 -- Animal reproduction.
591.4 -- Animal anatomy.
639.2 -- Fisheries.
639.2.001 -- Fisheries research.
H4 -- Zoology: fish.
(*7) -- Antarctic regions.
(*76) -- Ross Dependency.
(*80) -- Southern Ocean.
(*881) -- Ross Sea.
SPRI record no.: 186046

MARCXML

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001 SPRI-186046
005 20221004110150.0
007 ta
008 221004s2008####xx#ab#|##|###|0||#0|eng#d
035 ## ‡aSPRI-186046
040 ## ‡aUkCU-P‡beng‡eaacr
100 1# ‡aSutton, C. P.
245 10 ‡aBiological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica /‡cC.P. Sutton, and 3 others.
260 ## ‡a[S.l.] :‡b[s.n.],‡c2008.
300 ## ‡ap. 139-165 :‡bill., diags., tables, map.
500 ## ‡aCCAMLR Science. Vol. 15 :139-165 (2008).
520 3# ‡aPresents biological data from 303 specimens of Channichthyidae collected during 2005-06 Ross Sea toothfish fishing season. All specimens were identified as Chionobathyscus dewitti and showed no significant difference in sex ratio, and meristic, diet and age data were consistent with previous research. Gonad maturity stage data showed that most fish were either immature or resting (mature). Gonadosomatic indices (GSIs) plotted against sample month showed weak positive trend in GSI between December and February, though this was limited, probably due to short temporal distribution of data. Length-at-maturity and age-at-maturity ogives indicated that 50% of fish sampled were mature at about 340-360 mm total length (TL) and about 3-4 years of age, and that 95% were mature at about 370-400 mm TL and 6-8 years of age. Counts of growth zones in sectioned otoliths were used to determine ages and von Bertalanffy growth parameters. Growth was rapid for both sexes, and females approached significantly larger mean asymptotic maximum size than males. Maximum ages of 8 and 11 years were obtained for male and female fish respectively. Diet analysis showed most icefish stomachs were empty, with few prey items recovered generally in advanced stages of digestion, though this may be due to regurgitation of prey during capture.
650 07 ‡a597 -- Fish.‡2udc
650 07 ‡a597.583.1 -- Nototheniiformes.‡2udc
650 07 ‡a597.583.15 -- Channichthyidae: Chionobathyscus dewitti.‡2udc
650 07 ‡a591.1 -- Animal physiology.‡2udc
650 07 ‡a591.134 -- Animal growth.‡2udc
650 07 ‡a591.134.2 -- Animals, rate of growth.‡2udc
650 07 ‡a591.139 -- Animals, ageing.‡2udc
650 07 ‡a59.087 -- Age determination, zoology.‡2udc
650 07 ‡a591.16 -- Animal reproduction.‡2udc
650 07 ‡a591.4 -- Animal anatomy.‡2udc
650 07 ‡a639.2 -- Fisheries.‡2udc
650 07 ‡a639.2.001 -- Fisheries research.‡2udc
650 07 ‡aH4 -- Zoology: fish.‡2local
651 #7 ‡a(*7) -- Antarctic regions.‡2udc
651 #7 ‡a(*76) -- Ross Dependency.‡2udc
651 #7 ‡a(*80) -- Southern Ocean.‡2udc
651 #7 ‡a(*881) -- Ross Sea.‡2udc
773 0# ‡7nnas ‡tCCAMLR Science. ‡gVol. 15 (2008) ‡wSPRI-131147
916 ## ‡aHS
917 ## ‡aUnenhanced record from Muscat, imported 2019
948 3# ‡a20221004 ‡bHS