The early stages of development of the inflorescence of Philodendron insigne were examined using scanning electron microscopy. Pistillate flowers are initiated on the lower portion of the inflorescence and staminate flowers are initiated on the distal portion. The male flowers have three to five sta...

A new species of the rarely reported genus Euryozius Miers, 1886, is described from the Philippines and is distinguished from its congeners by carapace and ambulatory leg proportions, anterolateral margin armature, and form of the frontal margin. This new species, Euryozius camachoi, is only the thi...

A taxonomic survey was made of the Philippine species of the brown algal family Cystoseiraceae. Two species in two genera are herein reported: Hormophysa cuneiformis P.C. Silva and Cystoseira trinodis C. Agardh. Based on herbarium records examined, the former is more widespread in the waters around ...

The toxin-producing diatom Nitzschia pungens Grunow forma multiseries Hasle from three toxic blooms in two Prince Edward Island estuaries, spanning 1987-89, was studied using light and electron microscopy. Cell ultrastructure of N. pungens is, in general, similar to that of other species of Nitzschi...

A method to quantify induction of vitellogenin (Vtg) mRNA in adult male mosquitofish was developed. Male mosquitofish were exposed to 0, 1, 20 and 250 ng l(-1) 17beta-oestradiol (E(2)) for 4 and 8 days in static exposures, and liver Vtg mRNA and 18S rRNA expression were quantified in duplex RT-PCR. ...

Rainbow trout were exposed to a secondary treated, thermomechanical/bleached kraft pulp and paper effluent in 12,000-L, flow-through exposure tanks at an environmental research facility located at a pulp and paper mill in Kawerau, New Zealand. Trout (age, 2+ years) were obtained from a local hatcher...

Aquatic fungal colonization dynamics and seasonal patterns were investigated in two sites in Catamaran Brook, New Brunswick, Canada, as part of a larger study to evaluate logging effects on a salmon stream. Four leaf-pack trials were conducted between May 1995 and Dec 1996 to determine species compo...

Mayflies (Ephemeroptera) were collected from 35 sites (streams and tundra ponds) across southern Nunavut in 2002-2005. Nine mayfly species were previously reported for Nunavut: Acentrella feropagus Alba-Tercedor and McCafferty, Acerpenna pygmaea (Hagen), Baetis bundyae Lehmkuhl, B. flavistriga McDun...

The sterols in the trophosomes of Romanomermis culicivorax and Neomesomermis flumenalis were identified and compared with the sterols in the haemolymph of their larval insect hosts, Aedes aegypti and Simulium venustum, respectively. The C26 sterol 22-trans-24-norcholesta-5, 22-dien-3 beta -ol was pr...

The vegetative and reproductive morphology and anatomy of Halymenia specimens from the Philippines were studied and four species recognised: H. dilatata Zanardini, H. durvillei Bory de Saint-Vincent, H. maculata J. Agardh and H. porphyraeformis Parkinson. As many Halymenia taxa have previously been ...

Raw sewage and sewage at various stages of treatment were sampled from 15 municipal sewage treatment plants in south Queensland (Australia) and Canterbury (New Zealand). Estrogenic and androgenic activities were determined with sheep estrogen receptor and rainbow trout androgen receptor binding assa...

Predaceous water beetles were collected during expeditions along two northern Canadian rivers during 2000 and 2002. Twelve species of Dytiscidae (including 11 named species and one additional genus identified from a larva) and one species of Gyrinidae are recorded from 20 sites along the Horton and ...

The floral morphology of Ambrosina and Arisarum is analysed from a developmental and phylogenetic point of view. In Arisarum, there are atypical organs displaying male and female characteristics. This developmental study shows that the male flowers of Ambrosina are di- or tri-androus. A close phylog...

Adult yellow perch were stocked into experimental ponds designed to test the biological effects of aquatic reclamation alternatives currently being pursued by the oil sands mining industry. Water-quality characteristics of oil sands-influenced water in the experimental ponds included increased salin...

Exposure of Japanese medaka (O. latipes) embryos and adult males to sublethal concentrations of two commonly used fungicides, Acrobat MZ (a.i. are dimethomorph and mancozeb) and Tattoo C (a.i. are propanocarb and chlorothalonil) had varying effects on the development and adult male behaviour. During...

The early stages of inflorescence development in Philodendron fragrantissimum (Hook.) G. Don are examined using scanning electron microscopy. Pistillate flowers are initiated on the lower portion of the inflorescence and staminate flowers are initiated on the distal portion.