Batch fecundity and spawning frequency of southern blue whiting (Micromesistius australis) in the southwest Atlantic Ocean

The reproductive biology of southern blue whiting (Micromesistius australis) inhabiting waters of the southwest Atlantic Ocean (52°-53°S and 57°-62°W) was studied through histological analysis of the ovaries. During 2003, the spawning peak occurred at the beginning of September south of the Malvinas...

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Autores principales: Macchi, G.J., Pájaro, M., Wöhler, O.C., Acevedo, M.J., Centurión, R.L., Urteaga, D.G.
Formato: JOUR
Materias:
Atlantic Ocean
Fecundity
Micromesistius australis
Spawning frequency
fecundity
gadoid
reproductive biology
spawning
Atlantic Ocean (Southwest)
oceanic regions
World
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00288330_v39_n5_p993_Macchi
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00288330_v39_n5_p993_Macchi
record_format dspace
spelling todo:paper_00288330_v39_n5_p993_Macchi2023-10-03T14:39:11Z Batch fecundity and spawning frequency of southern blue whiting (Micromesistius australis) in the southwest Atlantic Ocean Macchi, G.J. Pájaro, M. Wöhler, O.C. Acevedo, M.J. Centurión, R.L. Urteaga, D.G. Atlantic Ocean Fecundity Micromesistius australis Spawning frequency fecundity gadoid reproductive biology spawning Atlantic Ocean Atlantic Ocean (Southwest) oceanic regions World Micromesistius australis The reproductive biology of southern blue whiting (Micromesistius australis) inhabiting waters of the southwest Atlantic Ocean (52°-53°S and 57°-62°W) was studied through histological analysis of the ovaries. During 2003, the spawning peak occurred at the beginning of September south of the Malvinas Islands. Batch fecundity of this species ranged from 35 000 (41 cm total length, TL) to 245 000 (62 cm TL) oocytes and relative batch fecundity was 122 ± 43 (Mean ± SD, n = 24) oocytes per gram somatic weight. The average proportion of mature females with stage-0 post-ovulatory follicles was 0.25 for September 2003, which indicated a spawning frequency of 4 days during the peak of the season. Large females produced more egg batches than small spawners during the same period, but no significant relationship was found between oocyte dry weight and female size of southern blue whiting. © 2005, Copyright Taylor & Francis Group, LLC. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00288330_v39_n5_p993_Macchi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Atlantic Ocean
Fecundity
Micromesistius australis
Spawning frequency
fecundity
gadoid
reproductive biology
spawning
Atlantic Ocean
Atlantic Ocean (Southwest)
oceanic regions
World
Micromesistius australis
spellingShingle Atlantic Ocean
Fecundity
Micromesistius australis
Spawning frequency
fecundity
gadoid
reproductive biology
spawning
Atlantic Ocean
Atlantic Ocean (Southwest)
oceanic regions
World
Micromesistius australis
Macchi, G.J.
Pájaro, M.
Wöhler, O.C.
Acevedo, M.J.
Centurión, R.L.
Urteaga, D.G.
Batch fecundity and spawning frequency of southern blue whiting (Micromesistius australis) in the southwest Atlantic Ocean
topic_facet Atlantic Ocean
Fecundity
Micromesistius australis
Spawning frequency
fecundity
gadoid
reproductive biology
spawning
Atlantic Ocean
Atlantic Ocean (Southwest)
oceanic regions
World
Micromesistius australis
description The reproductive biology of southern blue whiting (Micromesistius australis) inhabiting waters of the southwest Atlantic Ocean (52°-53°S and 57°-62°W) was studied through histological analysis of the ovaries. During 2003, the spawning peak occurred at the beginning of September south of the Malvinas Islands. Batch fecundity of this species ranged from 35 000 (41 cm total length, TL) to 245 000 (62 cm TL) oocytes and relative batch fecundity was 122 ± 43 (Mean ± SD, n = 24) oocytes per gram somatic weight. The average proportion of mature females with stage-0 post-ovulatory follicles was 0.25 for September 2003, which indicated a spawning frequency of 4 days during the peak of the season. Large females produced more egg batches than small spawners during the same period, but no significant relationship was found between oocyte dry weight and female size of southern blue whiting. © 2005, Copyright Taylor & Francis Group, LLC.
format JOUR
author Macchi, G.J.
Pájaro, M.
Wöhler, O.C.
Acevedo, M.J.
Centurión, R.L.
Urteaga, D.G.
author_facet Macchi, G.J.
Pájaro, M.
Wöhler, O.C.
Acevedo, M.J.
Centurión, R.L.
Urteaga, D.G.
author_sort Macchi, G.J.
title Batch fecundity and spawning frequency of southern blue whiting (Micromesistius australis) in the southwest Atlantic Ocean
title_short Batch fecundity and spawning frequency of southern blue whiting (Micromesistius australis) in the southwest Atlantic Ocean
title_full Batch fecundity and spawning frequency of southern blue whiting (Micromesistius australis) in the southwest Atlantic Ocean
title_fullStr Batch fecundity and spawning frequency of southern blue whiting (Micromesistius australis) in the southwest Atlantic Ocean
title_full_unstemmed Batch fecundity and spawning frequency of southern blue whiting (Micromesistius australis) in the southwest Atlantic Ocean
title_sort batch fecundity and spawning frequency of southern blue whiting (micromesistius australis) in the southwest atlantic ocean
url http://hdl.handle.net/20.500.12110/paper_00288330_v39_n5_p993_Macchi
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