Sexual maturity and spawning of the lizardfish saurida umeyoshii in the east China sea

Takeshi Sakai; Michio Yoneda; Muneharu Tokimura; Hiroshi Horikawa; Michiya Matsuyama

doi:10.2331/suisan.76.1

Sexual maturity and spawning of the lizardfish saurida umeyoshii in the east China sea

Takeshi Sakai, Michio Yoneda, Muneharu Tokimura, Hiroshi Horikawa, Michiya Matsuyama

Animal and Marine Bioresource Sciences

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Sexual maturity, annual reproductive cycle, and batch fecundity of the lizardfish Saurida umeyoshii were examined in specimens collected from the East China Sea between April 1998 and April 2000. The minimum fork length (FL) at sexual maturity was 180 mm in males and 228 mm in females. Females with mature and spawning stage ovaries were collected between April and December, during which higher percentages of occurrence of such females were found between June and September. This indicates that the spawning season extends between April and December, mainly from June to September. Time course sampling showed that final oocyte maturation occurred during the daytime and subsequent ovulation occurred in the evening. The occurrences of developmental stage composition of oocytes and postovulatory follicles in mature ovaries suggested that a female could spawn every day during the active spawning season. Batch fecundity (BF) in females with mature oocytes was related to FL (mm): BF= (1.70×10 ^-8)FL^4.88 (278≤FL≤421).

Original language	English
Pages (from-to)	1-9
Number of pages	9
Journal	Nippon Suisan Gakkaishi (Japanese Edition)
Volume	76
Issue number	1
DOIs	https://doi.org/10.2331/suisan.76.1
Publication status	Published - 2010

All Science Journal Classification (ASJC) codes

Aquatic Science

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10.2331/suisan.76.1

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title = "Sexual maturity and spawning of the lizardfish saurida umeyoshii in the east China sea",

abstract = "Sexual maturity, annual reproductive cycle, and batch fecundity of the lizardfish Saurida umeyoshii were examined in specimens collected from the East China Sea between April 1998 and April 2000. The minimum fork length (FL) at sexual maturity was 180 mm in males and 228 mm in females. Females with mature and spawning stage ovaries were collected between April and December, during which higher percentages of occurrence of such females were found between June and September. This indicates that the spawning season extends between April and December, mainly from June to September. Time course sampling showed that final oocyte maturation occurred during the daytime and subsequent ovulation occurred in the evening. The occurrences of developmental stage composition of oocytes and postovulatory follicles in mature ovaries suggested that a female could spawn every day during the active spawning season. Batch fecundity (BF) in females with mature oocytes was related to FL (mm): BF= (1.70×10 -8)FL4.88 (278≤FL≤421).",

author = "Takeshi Sakai and Michio Yoneda and Muneharu Tokimura and Hiroshi Horikawa and Michiya Matsuyama",

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AU - Sakai, Takeshi

AU - Yoneda, Michio

AU - Tokimura, Muneharu

AU - Horikawa, Hiroshi

AU - Matsuyama, Michiya

PY - 2010

Y1 - 2010

N2 - Sexual maturity, annual reproductive cycle, and batch fecundity of the lizardfish Saurida umeyoshii were examined in specimens collected from the East China Sea between April 1998 and April 2000. The minimum fork length (FL) at sexual maturity was 180 mm in males and 228 mm in females. Females with mature and spawning stage ovaries were collected between April and December, during which higher percentages of occurrence of such females were found between June and September. This indicates that the spawning season extends between April and December, mainly from June to September. Time course sampling showed that final oocyte maturation occurred during the daytime and subsequent ovulation occurred in the evening. The occurrences of developmental stage composition of oocytes and postovulatory follicles in mature ovaries suggested that a female could spawn every day during the active spawning season. Batch fecundity (BF) in females with mature oocytes was related to FL (mm): BF= (1.70×10 -8)FL4.88 (278≤FL≤421).

AB - Sexual maturity, annual reproductive cycle, and batch fecundity of the lizardfish Saurida umeyoshii were examined in specimens collected from the East China Sea between April 1998 and April 2000. The minimum fork length (FL) at sexual maturity was 180 mm in males and 228 mm in females. Females with mature and spawning stage ovaries were collected between April and December, during which higher percentages of occurrence of such females were found between June and September. This indicates that the spawning season extends between April and December, mainly from June to September. Time course sampling showed that final oocyte maturation occurred during the daytime and subsequent ovulation occurred in the evening. The occurrences of developmental stage composition of oocytes and postovulatory follicles in mature ovaries suggested that a female could spawn every day during the active spawning season. Batch fecundity (BF) in females with mature oocytes was related to FL (mm): BF= (1.70×10 -8)FL4.88 (278≤FL≤421).

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Sexual maturity and spawning of the lizardfish saurida umeyoshii in the east China sea

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