HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Peer-reviewed Journal Articles, etc >

Difference in Size at Maturity in Annual and Overwintering Generations in the TanaidaceanZeuxosp. in Oshoro Bay, Hokkaido, Japan

Files in This Item:
Zool Sci34-2_129-136.pdf1.01 MBPDFView/Open
Zool Sci34-2_129-136_supplementary materials.pdfSupplementary materials270.88 kBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Difference in Size at Maturity in Annual and Overwintering Generations in the TanaidaceanZeuxosp. in Oshoro Bay, Hokkaido, Japan
Authors: Kakui, Keiichi Browse this author →KAKEN DB
Hayakawa, Yoshinobu Browse this author
Katakura, Haruo Browse this author →KAKEN DB
Keywords: Tanaididae
population dynamics
reproductive cycle
size variation
direct development
Issue Date: Apr-2017
Journal Title: Zoological Science
Volume: 34
Issue: 2
Start Page: 129
End Page: 136
Publisher DOI: 10.2108/zs160134
PMID: 28397599
Abstract: We investigated the life cycle of the tanaidid Zeuxo sp. 1 (Crustacea: Peracarida: Tanaidacea), which lives epiphytically in dwelling tubes on the algae Sargassum spp. and Neorhodomela aculeata in Oshoro Bay, Hokkaido, Japan. We obtained data on its population size distribution, age structure, and reproductive phenology through monthly sampling from April 2011 to June 2012. From these data, we detected an overwintering group (F0) that arises from mancae that are released in autumn, overwinters, reproduces the following spring, and then disappears. The overwintering group produces mancae (F1) that reach maturity and themselves reproduce within six weeks after release; the F1, mancae give rise to an F2 and possibly an F3 generation within a single summer. We refer to individuals that reproduce in the same summer that they were released as the ‘annual group’. Reproduction overall was restricted to the period from May to October, when the seasurface temperature exceeded 10°C. During both years, overwintering females first became reproductive in May. Reproduction in the annual group began in June and continued through mid-October. Mancae were observed in samples from June through October. The two groups differed significantly in size at reproduction; compared to the annual group, females in the overwintering group reproduced at larger minimum and average body sizes, and males began to express enlarged chelae, a secondary sexual character, at a larger size. The difference in size at maturity may be related to the differences in water temperature during the main period of growth and maturation.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 角井 敬知

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University