| synchronous allelic expression at the glucosephosphate isomerase a and b loci in interspecific sunfish hybrids. | allelic isozymes of glucosephosphate isomerase at the gpi-a and -b loci were separated by starch gel electrophoresis in the warmouth (lepomis gulosus) and green sunfish (l. cyanellus). the specific tissue distributions and developmental expressions of the gpi-a2, -ab, and -b2 isozymes were not different between these two species. the synchrony of allelic expression in normal intraspecific sunfish crosses was demonstrated by means of an electrophoretic variant at the gpi-b locus. in embryos forme ... | 1976 | 1008802 |
| linkage analysis of the multilocus glucosephosphate isomerase isozyme system in sunfish (centrarchidae, teleostii). | the purpose of the present investigation is to determine whether the two duplicated glucosephosphate isomerase (ec 5.3.1.9) loci gpi-a and gpi-b reside on the same chromosome in teleostean fishes. interspecific sunfish hybrids were employed for the cross because of the different species-specific electrophoretic mobilities of the allelic isozymes at each gpi locus and because of their genomic compatibility. f1 sunfish hybrids, formed from a male warmouth (lepomis gulosus) x female green sunfish ( ... | 1976 | 1248735 |
| pilum pilum gen. et sp. n. (acanthocephala: echinorhynchidae) from freshwater fishes of the southeastern united states. | pilum pilum gen. et sp. n. is described from the warmouth, lepomis gulosus (cuvier); brown bullhead, ictalurus nebulosus (lesueur); yellow bullhead, i. natalis (lesueur); redbreast sunfish, l. auritus (linnaeus); bluegill, l. macrochirus rafinesque; spotted sunfish, l. punctatus (valenciennes); and redfin pickerel, esox americanus (gmelin), from the alabama river drainage, brown bullhead from the mobile bay drainage in alabama, and pirate perch, aphredoderus sayanus gilliams, from an atlantic co ... | 1976 | 1255353 |
| altered predation susceptibility of mosquitofish infected with eustrongylides ignotus. | eustrongylides ignotus is a parasitic nematode whose definitive hosts are often piscivorous wading birds (ciconiiformes). several species of small fishes are intermediate hosts, while larger predatory fish may be paratenic (transport) hosts. we examined predation susceptibility of infected mosquitofish (gambusia holbrooki) to three species of predatory fishes, including juvenile largemouth bass (micropterus salminoides), warmouth (lepomis gulosus), and bluegill (lepomis macrochirus). a 250 l aqu ... | 2001 | 11504229 |
| epizootiology of eustrongylides ignotus in florida: transmission and development of larvae in intermediate hosts. | under laboratory conditions, 2 modes of transmission of eustrongylides ignotus (nematoda: dioctophymatoidea) to fish were identified. eastern mosquitofish (gambusia holbrooki) became infected after ingestion of either eggs of e. ignotus containing first-stage larvae or aquatic oligochaetes (limnodrilus hoffmeisteri) containing third-stage larvae of e. ignotus. after removal from the uterus of gravid e. ignotus females and incubation for 17-28 days, depending on temperature, it was found that par ... | 2003 | 12760643 |
| variation in predation pressure as a mechanism underlying differences in numerical abundance between populations of the poeciliid fish heterandria formosa. | we explored whether a variation in predation and habitat complexity between conspecific populations can drive qualitatively different numerical dynamics in those populations. we considered two disjunct populations of the least killifish, heterandria formosa, that exhibit long-term differences in density, top fish predator species, and dominant aquatic vegetation. monthly censuses over a 3-year period found that in the higher density population, changes in h. formosa density exhibited a strong ne ... | 2006 | 16341890 |
| "active" passive sampling in two species of lepomis from par pond, south carolina, united states: a case study of infracommunity nestedness. | the influence of ontological diet shifts on infracommunity nestedness was examined by comparing the infracommunity structure of lepomis gulosus and lepomis macrochirus at 2 localities in par pond, south carolina, united states. fill-constrained, occurrence-constrained, and abundance-constrained null models were used to evaluate the degree of nestedness. the presence-absence matrices from all 4 component communities had significantly fewer discrepancies than those produced by the fill-constrained ... | 2009 | 19358622 |