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Reproduction, physiological responses, age structure, and food habits of            raccoon in Maryland, USA. <i>Z            S\u00e4ugetierkd<\/i>          48: 161\u2013175."},{"key":"4","doi-asserted-by":"crossref","unstructured":"4. Fritzell              EK. 1978.            Reproduction of Raccoons (<i>Procyon lotor<\/i>) in North            Dakota. <i>Am Midl Nat<\/i>          100: 253\u2013256.","DOI":"10.2307\/2424800"},{"key":"5","doi-asserted-by":"crossref","unstructured":"5. Grau              AG, Sanderson              GC, Rogers              JP. 1970.            Age determination of raccoons. <i>J Wildl              Manage<\/i>          34: 364\u2013372.","DOI":"10.2307\/3799023"},{"key":"6","unstructured":"6. Japan Meteorological            Agency Historical Weather Data. https:\/\/www.data.jma.go.jp\/stats\/etrn\/index.php [accessed on March 16,          2026]."},{"key":"7","doi-asserted-by":"crossref","unstructured":"7. 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Annual changes of testis size, seminiferous tubules and plasma            testosterone concentration of wild Sika deer (Cervus nippon yesoensis Heude, 1884) in            Hokkaido. <i>J Vet Med Sci<\/i>          54: 551\u2013556.","DOI":"10.1292\/jvms.54.551"},{"key":"23","doi-asserted-by":"crossref","unstructured":"23. Tsubota              T,                Howell-Skalla              L, Nitta              H, Osawa              Y, Mason              JI, Meiers              PG, Nelson              RA, Bahr              JM. 1997.            Seasonal changes in spermatogenesis and testicular steroidogenesis in the            male black bear Ursus americanus. <i>J Reprod              Fertil<\/i>          109: 21\u201327.","DOI":"10.1530\/jrf.0.1090021"},{"key":"24","unstructured":"24. Zeveloff              SI. 2002.          Reproduction and development. pp. 121\u2013134. 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