Seasonal reproduction of male Gambusia holbrooki (eastern mosquitofish) from two Florida lakes
| العنوان: | Seasonal reproduction of male Gambusia holbrooki (eastern mosquitofish) from two Florida lakes |
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| المؤلفون: | Louis J. Guillette, Hilary D. Miller, Thea M. Edwards, Gunnar Toft |
| المصدر: | Edwards, T M, Miller, H D, Toft, G & Guillette, L J 2013, ' Seasonal reproduction of male Gambusia holbrooki (eastern mosquitofish) from two Florida lakes ', Fish Physiology & Biochemistry . https://doi.org/10.1007/s10695-013-9772-z |
| بيانات النشر: | Springer Science and Business Media LLC, 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | Male, Physiology, Range (biology), media_common.quotation_subject, Aquatic Science, Biochemistry, Gambusia, Cyprinodontiformes, Nutrient, Testis, medicine, Animals, Body Size, Spermatogenesis, media_common, Analysis of Variance, Sperm Count, biology, Ecology, Reproduction, Eastern mosquitofish, Organ Size, General Medicine, Seasonality, biology.organism_classification, medicine.disease, Spermatozoa, Sperm, Lakes, Florida, Seasons, Mosquitofish |
| الوصف: | Sixteen monthly collections of adult male Gambusia holbrooki (eastern mosquitofish) were obtained from two lakes in central Florida, USA. Lake Woodruff and Lake Apopka are 36 miles apart, but differ in several environmental parameters. Compared with Lake Woodruff, Lake Apopka is warmer, more shallow in sampling areas (particularly during drought conditions; approximately 15-90 cm in Lake Apopka versus 60-120 cm in Lake Woodruff), more turbid, and more heavily contaminated with nutrients and industrial and agricultural chemicals. Here, we present detailed information on seasonal reproduction patterns in mosquitofish in their native range and compare patterns between fish from the two lakes. Male mosquitofish were reproductively active from spring through fall. Spermatogenesis, which is regulated in part by 11-ketotestosterone, ceased in October, and fish stored spermatozoa through the winter for immediate fertilization of offspring in the spring. Compared with Lake Woodruff, fish from Lake Apopka tended to be larger and have longer gonopodia and greater gonado- and hepato-somatic indices (GSI and HSI). High GSI in Apopka fish correlated with greater spermatid production, but fewer mature spermatozoa and either the same or lower sperm counts and sperm viability. Taken together, these observations suggest that differentiation of spermatids to spermatozoa is disrupted in Apopka fish, leading to reductions in fertility in some months. Delivery of sperm to females could also be affected in Apopka fish, which exhibit lower prevalence of efferent duct tissue in the testes during the summer. |
| تدمد: | 1573-5168 0920-1742 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e42b21ac14d2138559e2627f7f348a40 https://doi.org/10.1007/s10695-013-9772-z |
| حقوق: | RESTRICTED |
| رقم الأكسشن: | edsair.doi.dedup.....e42b21ac14d2138559e2627f7f348a40 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15735168 09201742 |
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