caa a22 4500 606228322 CHVBK 20210128101203.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10641-014-0305-0 doi (NATIONALLICENCE)springer-10.1007/s10641-014-0305-0 Dispersal, migration, and predation of juvenile crucian carps after release from rice fields [Elektronische Daten] [T. Taguchi, Y. Miura, D. Krueger, S. Sugiura] The crucian carp (Carassius spp.) fishery in Lake Biwa, Shiga Prefecture, Japan, is economically and culturally important. Annual fishery catch, however, has been decimated allegedly due to predation by largemouth bass (Micropterus salmoides) and bluegill (Lepomis macrochirus). This prompted the local government to restore natural stocks by rearing juvenile crucian carps in rice fields, but to little avail. Little is known about the post-release fate of aquacultured fish in this system. Hence, we conducted the present study to address the following questions: 1) How quickly do carp juveniles disperse from rice fields into Lake Biwa?, 2) Are carp juveniles preyed upon by largemouth bass and bluegill en route to Lake Biwa?, 3) Are there any differences in dispersal patterns or predation loss among different species or different size classes of crucian carps? Results showed that the approximately 1km movement from rice fields into Lake Biwa via the Ezura River was completed within about 2weeks of release. Largemouth bass consume carp juveniles, whereas bluegill consume few juveniles. Largemouth bass selected to consume larger juveniles, and C. grandoculis over C. cuvieri. These results suggest that: 1) carp juveniles should be released at smaller sizes (<30mm), 2) C. cuvieri may withstand predation pressure better than C. grandoculis, and 3) the presence of larger alternative prey may help reduce predation on juveniles. Rice fields are ideal nursery grounds for growing larval fish at low cost and effort. Increasing the post-release survival will effectively restore fishery resources in inland waters. Springer Science+Business Media Dordrecht, 2014 Bluegill nationallicence Fecal DNA nationallicence Largemouth bass nationallicence Prey selectivity nationallicence Stock-enhancement technology nationallicence Stomach contents nationallicence Taguchi T. Division of Environmental Dynamics, Graduate School of Environmental Sciences, The University of Shiga Prefecture, 2500 Hassaka, 522-8533, Hikone, Japan aut Miura Y. Division of Environmental Dynamics, Graduate School of Environmental Sciences, The University of Shiga Prefecture, 2500 Hassaka, 522-8533, Hikone, Japan aut Krueger D. Department of Fisheries and Wildlife, Michigan State University, 1109 North University Avenue, 48109, Ann Arbor, MI, USA aut Sugiura S. Division of Environmental Dynamics, Graduate School of Environmental Sciences, The University of Shiga Prefecture, 2500 Hassaka, 522-8533, Hikone, Japan aut Environmental Biology of Fishes Springer Netherlands 98/2(2015-02-01), 679-690 0378-1909 98:2<679 2015 98 10641 https://doi.org/10.1007/s10641-014-0305-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-014-0305-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Taguchi T. Division of Environmental Dynamics, Graduate School of Environmental Sciences, The University of Shiga Prefecture, 2500 Hassaka, 522-8533, Hikone, Japan aut NATIONALLICENCE 700 1- Miura Y. Division of Environmental Dynamics, Graduate School of Environmental Sciences, The University of Shiga Prefecture, 2500 Hassaka, 522-8533, Hikone, Japan aut NATIONALLICENCE 700 1- Krueger D. Department of Fisheries and Wildlife, Michigan State University, 1109 North University Avenue, 48109, Ann Arbor, MI, USA aut NATIONALLICENCE 700 1- Sugiura S. Division of Environmental Dynamics, Graduate School of Environmental Sciences, The University of Shiga Prefecture, 2500 Hassaka, 522-8533, Hikone, Japan aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/2(2015-02-01), 679-690 0378-1909 98:2<679 2015 98 10641