Characteristics of ovogenesis and some data on maturation and spawning of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), from the western part of the Equatorial Zone of the Indian Ocean
Research Group: Southern Scientific Research Institute of Marine Fishery and Oceanography (YugNIRO) 2, Sverdlov St., 334500 Kerch, Crimea Ukraine
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| Format: | Proceedings Paper biblioteca |
| Language: | English |
| Published: |
1996
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| Subjects: | Sexual reproduction, Oogenesis, Sexual maturity, ISW, West Indian Ocean, Euthynnus pelamis, Spawning, Developmental stages, |
| Online Access: | http://hdl.handle.net/1834/19 |
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dig-aquadocs-1834-192021-05-19T06:13:56Z Characteristics of ovogenesis and some data on maturation and spawning of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), from the western part of the Equatorial Zone of the Indian Ocean Timohina, O.I. Romanov, E.V. Sexual reproduction Oogenesis Sexual maturity ISW, West Indian Ocean Euthynnus pelamis Spawning Developmental stages Research Group: Southern Scientific Research Institute of Marine Fishery and Oceanography (YugNIRO) 2, Sverdlov St., 334500 Kerch, Crimea Ukraine Based on histological analysis of gonads taken from 616 specimens of skipjack tuna (Katsuwonus pelamis) in the western part of the equatorial Indian Ocean, a thorough description of all stages of maturity and cells is given at different stages of ovogenesis. Different phases of cell development were defined for each stage, and size of cells is given. A comparison of visual and histological determinations of maturity stages is made. Fish sizes and ages at which mass maturation is observed, sex ratio and its variation for different size groups in the area studied are suggested. Mass onset of maturity (50%) is observed when females reach 43 cm and males 40 cm in length and 1.5 years of age. Assessment of portioned fecundity is given. The spawning period of this species has been outlined in the western part of the equatorial zone of the Indian Ocean. Published 2004-08-26T13:57:21Z 2004-08-26T13:57:21Z 1996 Proceedings Paper IOTC Proceedings, 6th Expert Consultation on Indian Ocean Tunas, Vol. 9. p. 247-257 http://hdl.handle.net/1834/19 en 378417 bytes application/pdf |
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dig-aquadocs |
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biblioteca |
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English |
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Sexual reproduction Oogenesis Sexual maturity ISW, West Indian Ocean Euthynnus pelamis Spawning Developmental stages Sexual reproduction Oogenesis Sexual maturity ISW, West Indian Ocean Euthynnus pelamis Spawning Developmental stages |
| spellingShingle |
Sexual reproduction Oogenesis Sexual maturity ISW, West Indian Ocean Euthynnus pelamis Spawning Developmental stages Sexual reproduction Oogenesis Sexual maturity ISW, West Indian Ocean Euthynnus pelamis Spawning Developmental stages Timohina, O.I. Romanov, E.V. Characteristics of ovogenesis and some data on maturation and spawning of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), from the western part of the Equatorial Zone of the Indian Ocean |
| description |
Research Group: Southern Scientific Research Institute of Marine Fishery and Oceanography (YugNIRO) 2, Sverdlov St., 334500 Kerch, Crimea Ukraine |
| format |
Proceedings Paper |
| topic_facet |
Sexual reproduction Oogenesis Sexual maturity ISW, West Indian Ocean Euthynnus pelamis Spawning Developmental stages |
| author |
Timohina, O.I. Romanov, E.V. |
| author_facet |
Timohina, O.I. Romanov, E.V. |
| author_sort |
Timohina, O.I. |
| title |
Characteristics of ovogenesis and some data on maturation and spawning of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), from the western part of the Equatorial Zone of the Indian Ocean |
| title_short |
Characteristics of ovogenesis and some data on maturation and spawning of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), from the western part of the Equatorial Zone of the Indian Ocean |
| title_full |
Characteristics of ovogenesis and some data on maturation and spawning of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), from the western part of the Equatorial Zone of the Indian Ocean |
| title_fullStr |
Characteristics of ovogenesis and some data on maturation and spawning of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), from the western part of the Equatorial Zone of the Indian Ocean |
| title_full_unstemmed |
Characteristics of ovogenesis and some data on maturation and spawning of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758), from the western part of the Equatorial Zone of the Indian Ocean |
| title_sort |
characteristics of ovogenesis and some data on maturation and spawning of skipjack tuna, katsuwonus pelamis (linnaeus, 1758), from the western part of the equatorial zone of the indian ocean |
| publishDate |
1996 |
| url |
http://hdl.handle.net/1834/19 |
| work_keys_str_mv |
AT timohinaoi characteristicsofovogenesisandsomedataonmaturationandspawningofskipjacktunakatsuwonuspelamislinnaeus1758fromthewesternpartoftheequatorialzoneoftheindianocean AT romanovev characteristicsofovogenesisandsomedataonmaturationandspawningofskipjacktunakatsuwonuspelamislinnaeus1758fromthewesternpartoftheequatorialzoneoftheindianocean |
| _version_ |
1756074946822406144 |