Precision of Striped Bass Fry Density Estimates

Autor: Gary C. Matlock
Rok vydání: 2011
Předmět:
Zdroj: North American Journal of Aquaculture. 73:176-179
ISSN: 1548-8454
1522-2055
DOI: 10.1080/15222055.2011.574942
Popis: Many fisheries for striped bass Morone saxatilis in the United States are supported by stocking hatchery-reared fish. Fingerlings are usually obtained by spawning adults in captivity, collecting fry in large (25–100-L) collection containers (vats), moving them to rearing facilities (e.g., earthen ponds and raceways), and subsequently harvesting the fish that remain after some predetermined period. The number of fry stocked is estimated, and the accuracy and precision are seldom known or reported. The effect of treating fry stocking estimates as “error free, complete counts” on survival and production estimates is, therefore, also unknown. The objective of this study was to document and determine the statistical precision of the procedures used at Texas Parks and Wildlife Department's Dundee Fish Hatchery through the 1990s (standard procedures still in use at many hatcheries) for estimating fry densities in vats. The precision of fry density estimates was directly correlated with the mean density ...
Databáze: OpenAIRE
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