01916nas a2200145   4500008004100000245013500041210006900176300001200245490000800257520135900265653006201624100001701686700002301703856004401726       1994                        eng d00aAllozyme electrophoretic analysis of the Hediste limnicola - H. diversicolor - H. japonica species complex (Polychaeta:Nereididae)0 aAllozyme electrophoretic analysis of the Hediste limnicola H div  a463-4700 v1183 aThree morphologically similar species of the polychaete genus Hediste (H. limnicola (Johnson, 1901), H. diversicolor (O. F. Muller, 1776), and H. japonica (Izuka, 1908)) have been described, respectively, from the west coast of North America, Europe, and Japan. Although these taxa are geographically isolated by oceans, the morphological criteria by which they can be separated are sufficiently variable as to make identification difficult. We have compared these three taxa biochemically using ten allozyme loci and have found that they are genetically distinct and constitute valid species. H. japonica (collected in June 1990 from Kyushu, Japan) appears more closely related to H. limnicola (collected in July 1989 from two sites in California and two in Oregon, USA) than it is to H. diversicolor (collected in October-November 1989 from the Weser estuary and the Jadebusen in Germany). H. limnicola has been recognized previously as a self-fertilizing hermaphrodite, but it is quite polymorphic in the four populations examined and we suggest that some cross-fertilization must occur in the field. Marked allele frequency differences between the two H. diversicolor populations examined, which were separated by only about 30 km, suggested that there was restricted gene flow between populations, or that there had been strong short-term selection.10aABRS FAUNA VOL4 NEEDED NEREIDIDAE NEEDED paragnath ms new1 aFong, P., P.1 aGarthwaite, R., L.  uhttps://annelida.myspecies.info/node/4401839nas a2200133   4500008004100000245013500041210006900176300000800245490000800253520136000261100001701621700002301638856004401661       1994                        eng d00aAllozyme electrophoretic analysis of the Hediste limnicola - H. diversicolor - H. japonica species complex (Polychaeta:Nereididae)0 aAllozyme electrophoretic analysis of the Hediste limnicola H div  a4630 v1183 aThree morphologically similar species of the polychaete genus Hediste [H. limnicola (Johnson, 1901), H. diversicolor (O. E M/iller, 1776), and H. japonica (Izuka, 1908)] have been described, respectively, from the west coast of North America, Europe, and Japan. Although these taxa are geographically isolated by oceans, the morphological criteria by which they can be separated are sufficiently variable as to make identification difficult. We have compared these three taxa biochemically using ten allozyme loci and have found that they are genetically distinct and constitute valid species. H. japonica (collected in June 1990 from Kyushu, Japan) appears more closely related to H. limnicola (collected in July 1989 from two sites in California and two in Oregon, USA) than it is to H. diversicolor (collected in October- November 1989 from the Weser estuary and the Jadebusen in Germany). H. limnicola has been recognized previously as a self-fertilizing hermaphrodite, but it is quite polymorphic in the four populations examined and we suggest that some cross-fertilization must occur in the field. Marked allele frequency differences between the two H. diversicolor populations examined, which were separated by only about 30 km, suggested that there was restricted gene flow between populations, or that there had been strong short-term selection.1 aFong, P., P.1 aGarthwaite, R., L.  uhttps://annelida.myspecies.info/node/4501782nas a2200145   4500008004100000245015600041210006900197300002000266490000800286520124000294653002201534100001701556700001901573856004401592       1992                        eng d00aEvidence for a programmed circannual life cycle modulated by increasing daylengths in Neanthes limnicola (Polychaeta: Nereidae) from central California0 aEvidence for a programmed circannual life cycle modulated by inc  a289-297,illustr0 v1823 aTiming of parturition, fecundity, and life span were determined in laboratory cultures of the semelparous, self-fertilizing, viviparous polychaete Neanthes limnicola. Worms were exposed to fixed daylengths (short-8h light: 16h dark; neutral-12h:12h; long-16h:8h), switched between different fixed daylengths, and switched from fixed daylengths to increasing or decreasing daylengths. Timing of parturition was synchronized when under neutral daylength, but became asynchronous under both short and long daylength, as well as when any of the fixed daylength was followed by decreasing daylenths. Worms under neutral daylength had the highest fecundities and shortest life spans, while those under long days had the lowest fecundities and longer life spans. When fixed daylength (short, neutral, long) was followed by increasing daylengths, timing of parturition was synchronized, fecundity was high, and life span shortened. These and earlier published experiments on the influence of seasonally changing photoperiods indicate that the life cycle of the estuarine N. limnicola is programmed to be completed in somewhat less than a year, and that seasonally changing photoperiods modulate it to determine the optimal time of parturition.10aREPRINT/PHOTOCOPY1 aFong, P., P.1 aPearse, J., S.  uhttps://annelida.myspecies.info/node/50