Literaturdatenbank
Literaturdatenbank |
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Robinson, K. M., & Murphy, G. C. (1978). The reproductive cycle of the eastern spiny softshell turtle (trionyx spiniferus spiniferus). Herpetologica, 34(2), 137–140.
Added by: Admin (25 Aug 2008 21:58:47 UTC) Last edited by: Beate Pfau (01 Aug 2009 08:57:20 UTC) |
| Resource type: Journal Article BibTeX citation key: Robinson1978 View all bibliographic details  |
Categories: General Keywords: Apalone, Apalone spinifera, Fortpflanzung = reproduction, Habitat = habitat, Nordamerika = North America, Schildkröten = turtles + tortoises, Trionychidae Creators: Murphy, Robinson Collection: Herpetologica |
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| Abstract |
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Trionyx spiniferus The reproductive cycle of the eastern spiny softshell turtle, Trionyx spiniferus spiniferus, was studied using specimens collected from the Stones River, Rutherford County, Tennessee, from 1971-1974. Males and ♀ ♀ matured at body weights of approximately 130 and 1500 g, respectively. Spermatogenesis began in the spring with an increase in the number of spermatogonia and peaked in late summer. Sperm then were passed to the epididymides where they presumably overwintered. Ovarian follicles enlarged throughout the year, with the possible exception of winter, and underwent ovulation in May-June. Egg-laying occurred in June-July. Evidence is given for 2 clutches of eggs/season in larger ♀ ♀. Added by: Admin Last edited by: Beate Pfau |