The effects of photoperiod and temperature on embryonic diapause termination in the hermit crab <i>Pagurus nigrofascia</i>
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- Mishima Shinji
- The Ultramicroscopy Research Center, Kyushu University
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- Kobayashi Satoshi
- Department of Applied Biological Sciences, Faculty of Agriculture, Saga University
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- Yamada Katsumasa
- Aitsu Marine Station, Center for Water Cycle, Marine Environment, and Disaster Management, Kumamoto University
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- Henmi Yasuhisa
- Aitsu Marine Station, Center for Water Cycle, Marine Environment, and Disaster Management, Kumamoto University
Bibliographic Information
- Other Title
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- The effects of photoperiod and temperature on embryonic diapause termination in the hermit crab Pagurus nigrofascia
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Abstract
<p>The intertidal hermit crab Pagurus nigrofascia reproduces in March in Fukuoka, Japan. The embryos remain in diapause until October, begin to develop in November, and most broods hatch in December. This study examined the effects of photoperiod and temperature on embryonic diapause termination (EDT) in both laboratory and field conditions. Females with diapause eggs were maintained in the laboratory under three different photoperiod/temperature regimes: constant (14L/10D, 22°C), decreasing photoperiod condition (from 12L/12D to 9.8L/14.2D, 22°C), and decreasing temperature condition (14L/10D, from 22°C to 10°C). The EDT date was compared among four groups: the above three experimental groups and the field group. The dates at which >50% of females possessed eggs after the EDT were November 10 (constant), October 30 (decreasing photoperiod), September 27 (decreasing temperature), and November 4 (field). The mean duration until EDT was 82 days (constant), 67 days (decreasing photoperiod), and 36 days (decreasing temperature). Diapause was significantly shorter under both the decreasing photoperiod and the decreasing temperature conditions compared to the constant. Thus, EDT was strongly affected by temperature but weakly altered by photoperiod. This study is the first to report the influence of photoperiod and temperature on EDT in decapod crustaceans.</p>
Journal
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- Plankton and Benthos Research
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Plankton and Benthos Research 16 (2), 79-83, 2021-05-27
The Plankton Society of Japan, The Japanese Association of Benthology
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Keywords
Details 詳細情報について
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- CRID
- 1390006850498809600
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- NII Article ID
- 130008050977
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- NII Book ID
- AA12130745
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- ISSN
- 1882627X
- 18808247
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- NDL BIB ID
- 031465400
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed