Spawning and early development of captive yellowfin tuna (Thunnus albacares)

Margulies, Daniel and Sutter, Jenny M. and Hunt , Sharon L. and Olson, Robert J. and Scholey, Vernon P. and Wexler, Jeanne B. and Nakazawa, Akio (2007) Spawning and early development of captive yellowfin tuna (Thunnus albacares). Fishery Bulletin, 105(2), pp. 249-265.

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Abstract

In this study we describe the courtship and spawning behaviors of captive yellowfin tuna (Thunnus albacares), their spawning periodicity, the influence of physical and biological factors on spawning and hatching, and egg and early-larval development of this species at the Achotines Laboratory, Republic of Panama, during October 1996 through March 2000. Spawning occurred almost daily over extended periods and at water temperatures from 23.3° to 29.7°C. Water temperature appeared to be the main exogenous factor controlling the occurrence and timing of spawning. Courtship and spawning behaviors were ritualized and consistent among three groups of broodstock over 3.5 years. For any date, the time of day of spawning (range: 1330 to 2130 h) was predictable from mean daily water temperature, and 95% of hatching occurred the next day between 1500 and 1900 h. We estimated that females at first spawning averaged 1.6−2.0 years of age. Over short time periods (<1 month), spawning females increased their egg production from 30% to 234% in response to shortterm increases in daily food ration of 9% to 33%. Egg diameter, notochord length (NL) at hatching, NL at first feeding, and dry weights of these stages were estimated. Water temperature was significantly, inversely related to egg size, egg-stage duration, larval size at hatching, and yolksac larval duration.

Item Type: Article
Title: Spawning and early development of captive yellowfin tuna (Thunnus albacares)
Personal Creator/Author:
CreatorsEmail
Margulies, Daniel
Sutter, Jenny M.
Hunt , Sharon L.
Olson, Robert J.
Scholey, Vernon P.
Wexler, Jeanne B.
Nakazawa, Akio
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 105
Number: 2
Page Range: pp. 249-265
Date: 2007
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8895
Depositing User: Patti M. Marraro
Date Deposited: 18 Jun 2012 09:33
Last Modified: 18 Jun 2012 09:33
URI: http://aquaticcommons.org/id/eprint/8895

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