文章基本信息

标题：Application of a Length-Categorization System for Pallid Sturgeon ( Scaphirhynchus albus )
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作者：Dane A. Shuman ; David W. Willis ; Steven C. Krentz 等
期刊名称：Journal of Freshwater Ecology
印刷版ISSN：0270-5060
电子版ISSN：2156-6941
出版年度：2006
卷号：21
期号：1
页码：71-76
DOI：10.1080/02705060.2006.9664098
出版社：Taylor & Francis
摘要：Length-frequency data can be quantified using proportional stock density and relative stock density indices. However, standardized length categories must be available for each fish species. Thus, we developed standard length categories for calculation of stock density indices for pallid sturgeon (Scaphirhynchus albus.) Based on the longest fish (1,638 mm fork length) that we could find in sampling records or from angler catches, we propose the following length categories: stock = 33 cm (13 in); quality = 63 cm (25 in); preferred = 84 cm (33 in); memorable = 104 cm (41 in); and trophy = 127 cm (50 in). Using these length categories, we then calculated the size structure indices for pallid sturgeon populations in which recruitment had been supplemented with hatchery-produced fish.