Population structure and reproductive biology of the fiddler crab Uca inversa (Hoffman, 1874) (Brachyura: Ocypodidae) |
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| Institution: | 1. Center for Global Development, Washington, DC 20036, USA;1. Department of Marine Biotechnology and Resources and Division of Marine Biotechnology, Asia-Pacific Ocean Research Center, National Sun Yat-sen University, Kaohsiung 804, Taiwan;2. National Museum of Marine Biology and Aquarium, Pingtung 944, Taiwan;3. Department of Neurosurgery, Kaohsiung Chang Gung Memorial Hospital-Kaohsiung Medical Center, Kaohsiung 833, Taiwan;4. Doctoral Degree Program in Marine Biotechnology, National Sun Yat-sen University and Academia Sinica, Kaohsiung 804, Taiwan;5. Graduate Institute of Marine Biology and Department of Life Science and Institute of Biotechnology, National Dong Hwa University, Pingtung 944, Taiwan;6. Graduate Institute of Natural Products, Chang Gung University, Taoyuan 333, Taiwan;7. Department of Sport, Health, and Leisure, Cheng Shiu University, Kaohsiung 833, Taiwan;8. Graduate Institute of Pharmaceutical Technology & Department of Pharmacy, Tajen University, Pingtung 907, Taiwan;9. School of Pharmacy, College of Pharmacy, China Medical University, Taichung 404, Taiwan;10. Chinese Medicine Research and Development Center, China Medical University Hospital, Taichung 404, Taiwan;11. Center for Molecular Medicine, China Medical University Hospital, Taichung 404, Taiwan;12. Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan;1. Graduate Institute of Marine Biology, National Dong Hwa University, Pingtung, 944, Taiwan;2. National Museum of Marine Biology and Aquarium, Pingtung, 944, Taiwan;3. Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, 804, Taiwan;4. Division of Dentistry, Zuoying Branch of Kaohsiung Armed Forces General Hospital, Kaohsiung, 813, Taiwan;5. Doctoral Degree Program in Marine Biotechnology, National Sun Yat-sen University, Kaohsiung, 804, Taiwan;6. Doctoral Degree Program in Marine Biotechnology, Academia Sinica, Taipei, 115, Taiwan;7. Division of Neurosurgery, Department of Surgery, Kaohsiung Armed Forces General Hospital, Kaohsiung, 802, Taiwan;8. Department of Neurological Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei, 114, Taiwan;9. Faculty of Pharmacy, School of Pharmaceutical Sciences, National Yang-Ming University, Taipei, 112, Taiwan;10. Chinese Medicine Research and Development Center, China Medical University Hospital, Taichung, 404, Taiwan;11. Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung, 807, Taiwan;12. Research Center for Natural Products and Drug Development, Kaohsiung Medical University, Kaohsiung, 807, Taiwan;13. Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, 807, Taiwan;1. Graduate Institute of Marine Biology, National Dong Hwa University, Pingtung 94450, Taiwan;2. National Museum of Marine Biology and Aquarium, Pingtung 94450, Taiwan;3. Department of Food Science, National Quemoy University, Kinmen 89250, Taiwan;4. Instrumentation Center, National Taiwan University, Taipei 10617, Taiwan;5. Research Center for Chinese Herbal Medicine, Research Center for Food and Cosmetic Safety, Graduate Institute of Healthy Industry Technology, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33303, Taiwan;6. Graduate Institute of Natural Products, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan;7. Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University, Taoyuan 33302, Taiwan;8. Department of Anaesthesiology, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan;9. Department of Biological Technology, Meiho University, Pingtung 91202, Taiwan;10. Antai Medical Care Cooperation Antai Tian-Sheng Memorial Hospital, Pingtung 92843, Taiwan;11. Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 80424, Taiwan;12. Chinese Medicine Research and Development Center, China Medical University Hospital, Taichung 40447, Taiwan;13. Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;1. Graduate Institute of Marine Biology, National Dong Hwa University, Pingtung 94450, Taiwan;2. National Museum of Marine Biology and Aquarium, Pingtung 94450, Taiwan;3. Research Center for Chinese Herbal Medicine, Research Center for Food and Cosmetic Safety, Graduate Institute of Health Industry Technology, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33303, Taiwan;4. Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China;5. Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao 266235, China;6. Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 80424, Taiwan;7. Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;8. Research Center for Natural Products and Drug Development, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;9. Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80756, Taiwan;10. Chinese Medicine Research and Development Center, China Medical University Hospital, Taichung 40447, Taiwan |
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| Abstract: | The population structure and reproductive biology of Uca inversa (Hoffman) were studied in Mozambique for the first time. Crabs were randomly sampled on monthly basis during low tide periods from January to December 2002 at Costa do Sol mangrove, Maputo Bay, southern Mozambique. A total of 1131 crabs was obtained, of which 518 (45.8%) were males, 322 non-ovigerous females (29.3%) and 281 (24.8%) ovigerous females, respectively. The present population presents non-normal size frequency distributions, with males reaching greater size than females. The overall sex ratio (M:F) (1:0.84) was significantly different from the 1:1 ratio. Ovigerous females were present throughout the year and the embryonic development showed synchrony with the gonadosomatic index, in which females carrying eggs close to hatching were more abundant when the gonadosomatic index reached minimum values in the population. Egg number increases with female size. Juvenile recruitment was also continuous with high proportion of young recruits being recorded in winter, probably due to the high reproductive activity displayed in summer. U. inversa exhibits a rapid embryonic cycle accompanied by a rapid larval development and settlement in the study area. |
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