| predation of mansonia (diptera: culicidae) by native mosquitofish in southern florida. | in experimental tanks and wading pools, the mosquitofish gambusia holbrooki reduced densities of mansonia larvae which, because of their attachment to the roots of aquatic plants, have been regarded previously as relatively impervious to predation. exoskeletal remains of larval mansonia were recovered from 43.5% of stomachs dissected from g. holbrooki, but not from heterandria formosa (least killifish) collected from two undisturbed ponds covered with water lettuce (pistia stratiotes l.). after ... | 1992 | 1495036 |
| variation in the bemisia tabaci s. l. species complex (hemiptera: aleyrodidae) and its natural enemies leading to successful biological control of bemisia biotype b in the usa. | parasitoids of the bemisia tabaci (gennadius) species complex collected in spain and thailand were evaluated as biological control agents of b. tabaci biotype b in cole crops in texas, usa. parasitoids were identified by morphological and rapd-pcr analyses. the most abundant parasitoid from spain was eretmocerus mundus mercet with apparent field parasitism of 39-44%. in thailand, encarsia formosa gahan, e. transvena timberlake, e. adrianae lopez-avila, eretmocerus sp. 1 and sp. 2 emerged, with a ... | 2000 | 11020790 |
| survival time analysis of least killifish (heterandria formosa) and mosquitofish (gambusia affinis) in acute exposures to endosulfan sulfate. | single-species flow-through toxicity tests were conducted to determine the times-to-death of two indigenous fish to south florida--least killifish (heterandria formosa) and mosquitofish (gambusia affinis)--from acute exposure to endosulfan sulfate. mortalities were recorded within 8-h periods from test initiation to termination at 96 h. the 96-h lc(50)s for least killifish and mosquitofish estimated using the trimmed-spearman-karber method were 2.0 and 2.3 microg/l, respectively. an accelerated ... | 2010 | 19921326 |
| acute toxicity and effects analysis of endosulfan sulfate to freshwater fish species. | endosulfan sulfate is a persistent environmental metabolite of endosulfan, an organochlorine insecticide-acaricide presently registered by the united states environmental protection agency. there is, however, limited acute fish toxicity data for endosulfan sulfate. this study determines the acute toxicity (lc₅₀s and lc₁₀s) of endosulfan sulfate to three inland florida native fish species (mosquitofish [gambusia affinis]; least killifish [heterandria formosa]; and sailfin mollies [poecilia latipi ... | 2010 | 21127850 |