吝啬性
发表于 2025-3-23 10:35:34
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cumulative
发表于 2025-3-23 16:21:51
Sturgeon rivers: An introduction to acipenseriform biogeography and life history and the range of life history patterns displayed by different species. Our biogeographic analysis (based on the most recent phylogenetic analysis including fossil Acipenseriformes) suggests that Acipenseriformes originated in Europe, and that early diversification took place in Asia. Acipenseriform
Ergots
发表于 2025-3-23 20:17:24
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Euphonious
发表于 2025-3-24 00:07:44
Endangered migratory sturgeons of the lower Danube River and its deltageon . and perhaps European Atlantic sturgeon .. The freshwater sterlet . thrived in the Danube and its tributaries. Presently, only three anadromous species occur in the Romanian part of the Danube, . and ., while . lives in the Danube and its tributaries. Extreme depletion in the number of sturgeo
LAP
发表于 2025-3-24 03:52:44
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offense
发表于 2025-3-24 06:44:33
Species structure, contemporary distribution and status of the Siberian sturgeon, rms can be described as threatened or endangered. Recently, the abundance of the nominal subspecies, ., which inhabits mainly the Ob River basin, decreased sharply. Due to construction of hydroelectric dams, up to 40% of the spawning grounds became inaccessible for migrating sturgeon of this subspec
隼鹰
发表于 2025-3-24 12:34:35
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挥舞
发表于 2025-3-24 18:40:37
Observations on the reproductive cycle of cultured white sturgeon,and puberty are highly asynchronous in the female stock. Gonadal cycles are annual in males and biennial in females, and gametogenesis is influenced by season. Neuroendocrine regulation of reproduction appears to involve a dual gonadotropin system controlling gonadal development and spawning. Labil
Small-Intestine
发表于 2025-3-24 20:14:31
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chalice
发表于 2025-3-25 00:00:31
Life history and status of the shovelnose sturgeon, ican sturgeons, seldom weighing more than 2.5 kg over most of its range except in the upper Missouri River, where individuals of over 7 kg have been found. Spawning occurs in spring at temperatures between 17 and 21 °C over rock or gravel substrate down-stream from dams, near rock structures, or in