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Comparative Acute Sensitivity of Larval Topsmelt, Atherinops affinis, and Inland Silversides, Menidia beryllina to 11 Chemicals - English
URL: http://www.epa.gov/ged/publica/c0737.htm

Larval topsmelt (Atherinops affinis) and inland silversides (Menidia beryllina) were exposed in 96-hr static acute toxicity tests to eleven chemicals to determine the relative sensitivity to the two atherinid species. High to low LC50 ratios for endosulfan, methoxychlor, carbophenothion, chlorpyrifos, terbufos, fenvalerate, permethrin, 4-nitrophenol, and sodium lauryl sulfate were within a factor of < 2 for the two species. A. affinis was more sensitive to both azinphos-methyl and 2,4-dinitrophenol by factors of 6.7 and 4.4, respectively.

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Topsmelt - Atherinops affinis - English
URL: http://elib.cs.berkeley.edu/kopec/tr9/html/sp-topsmelt.html

The range of the topsmelt extends from the Gulf of California to Vancouver Island, British Columbia (Miller and Lea 1972; Hart 1973). Of the three subspecies described by Schultz (1933) as being found within this range, the San Francisco topsmelt, Atherinops affinis affinis is the only one inhabiting the Sacramento-San Joaquin estuary. Topsmelt are particularly abundant in the shallow waters of south Bay; young-of-the-year are common in the mesohaline to oligohaline portions of the estuary.

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Nonindigenous Fishes - Atherinops regius - English
URL: http://nas.er.usgs.gov/fishes/accounts/atherini/at_regiu.html

Native Range: Marine; Gulf of California.

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