Ovarian development and induced oviposition of the overwintering swimming crab Portunus trituberculatus (Brachyura: Portunidae) reared in the laboratory

Females of the swimming crab Portunus trituberculatus were cultured under natural temperature and high temperature (21 deg C) conditions to examine ovarian development and oviposition from autumn (October) to the beginning of breeding season In the following spring (May). Ovaries developed because o...

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Published inFisheries science Vol. 70; no. 6; pp. 988 - 995
Main Authors Hamasaki, K. (National Center for Stock Enhancement, Tamano, Okayama (Japan). Tamano Station), Imai, H, Akiyama, N, Fukunaga, K
Format Journal Article
LanguageEnglish
Published Melbourne, Australia Blackwell Science Pty 01.12.2004
Springer Nature B.V
Subjects
Aquaculture
Brachyura
Breeding seasons
CAPTIVITY
Decapoda
Environmental factors
Fisheries
Herbivores
High temperature
INDUCED OVULATION
ovarian development
OVARIES
Overwintering
oviposition
photoperiod
Portunidae
PORTUNUS
Portunus trituberculatus
SEXUAL MATURITY
Shellfish
Spring
Swimming
Swimming crab
Temperature
WINTERING
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Summary:Females of the swimming crab Portunus trituberculatus were cultured under natural temperature and high temperature (21 deg C) conditions to examine ovarian development and oviposition from autumn (October) to the beginning of breeding season In the following spring (May). Ovaries developed because of vitellogenesis of oocytes from October to December and their developmental state did not change during the overwintering period from December to March. In spring, from late March to mid May, some ovaries reached prematuration and maturation stages and ovipositions began from mid-late April under natural temperature conditions. Females reared in tanks of high temperature regimes oviposited earlier than those reared in tanks of natural temperatures. The number of days to oviposition tended to decrease with advancement of the beginning times (early February to late April) of culture of females under high temperature regimes; induced ovipositions were achieved more easily with increasing photopetriod from c. 12 h in early February to c. 14 h in late April. Therefore, It is inferred that the temperature and photoperiod are important environmental factors controlling ovarian development and oviposition.
Bibliography:2005005017
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M12
Faculty of Marine Science, Tokyo University of Marine Science and Technology, Minato, Tokyo 108‐8477, Japan.
Akkeshi Station, National Center for Stock Enhancement, Fisheries Research Agency, Akkeshi, Hokkaido 088‐1108, Japan.
Faculty of Science, University of the Ryukyus, Nishihara, Okinawa 903‐0213, Japan.
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ISSN:0919-9268
1444-2906
DOI:10.1111/j.1444-2906.2004.00898.x