Effects of maternal age and size on embryonic energy reserves, developmental timing, and fecundity in quillback rockfish (Sebastes maliger)

Rodgveller, Cara J. and Lunsford, Chris R. and Fujioka, Jeffrey T. (2012) Effects of maternal age and size on embryonic energy reserves, developmental timing, and fecundity in quillback rockfish (Sebastes maliger). Fishery Bulletin, 110(1), pp. 36-45.

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Official URL: http://fishbull.noaa.gov/1101/rodgveller.pdf

Abstract

Maternal effects on the quality of progeny can have direct impacts on population productivity. Rockfish are viviparous and the oil globule size of larvae at parturition has been shown to have direct effects on time until starvation and growth rate. We sampled embryos and preparturition larvae opportunistically from 89 gravid quillback rockfish (Sebastes maliger) in Southeast Alaska. Because the developmental stage and sampling period were correlated with oil globule size, they were treated as covariates in an analysis of maternal age, length, and weight effects on oil globule size. Maternal factors were related to developmental timing for almost all sampling periods, indicating that older, longer, and heavier females develop embryos earlier than younger, shorter, or lighter ones. Oil globule diameter and maternal length and weight were statistically linked, but the relationships may not be biologically significant. Weight-specific fecundity did not increase with maternal size or age, suggesting that reproductive output does not increase more quickly as fish age and grow. Age or size truncation of a rockfish population, in which timing of parturition is related to age and size, could result in a shorter parturition season. This shortening of the parturition season could make the population vulnerable to fluctuating environmental conditions.

Item Type: Article
Title: Effects of maternal age and size on embryonic energy reserves, developmental timing, and fecundity in quillback rockfish (Sebastes maliger)
Personal Creator/Author:
CreatorsEmail
Rodgveller, Cara J.
Lunsford, Chris R.
Fujioka, Jeffrey T.
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 110
Number: 1
Page Range: pp. 36-45
Date: January 2012
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8688
Depositing User: Patti M. Marraro
Date Deposited: 07 Jun 2012 14:48
Last Modified: 07 Jun 2012 14:48
URI: http://aquaticcommons.org/id/eprint/8688

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