Vadicola aprostatus gen. nov., sp. nov., a marine oligochaete (Tubificidae; Rhyacodrilinae) from British Columbia

1982 ◽  
Vol 60 (12) ◽  
pp. 3232-3236 ◽  
Author(s):  
H. R. Baker
Keyword(s):  
British Columbia ◽  
Ejaculatory Duct ◽  
Coarse Sand ◽  
Prostate Cells ◽  
Freshwater Influence ◽  
Intertidal Habitats

Vadicola aprostatus gen. nov., sp. nov., a marine tubificid (Annelida; Oligochaeta) from intertidal habitats of British Columbia (usually coarse sand without obvious freshwater influence), is characterized by an internal projection in the ejaculatory duct and a lack of prostate cells on the atria. Vadicola aprostatus is placed in the subfamily Rhyacodrilinae.

New records of marine Marionina (Oligochaeta, Enchytraeidae) from the Pacific Northeast, with a description of Marionina klaskisharum sp. nov.

1983 ◽  
Vol 61 (4) ◽  
pp. 822-831 ◽  
Author(s):  
Kathryn A. Coates
Keyword(s):  
British Columbia ◽  
New Records ◽  
Seminal Vesicles ◽  
Northern California ◽  
Species List ◽  
The Pacific ◽  
Structural Differences ◽  
Intertidal Habitats

Four species of the enchytraeid oligochaete genus Marionina from intertidal habitats are added to the British Columbia species list: Marionina klaskisharum sp. nov., M. nevisensis (Righi and Kanner, 1979), M. southerni Cernosvitov, 1937, and M. glandulifera (Jansson, 1960). Marionina nevisensis is asetate; M. klaskisharum has setal bundles ventrally in II to V, each represented by a single seta; M. glandulifera has only ventral, bisetate setal bundles; and M. southerni has lateral and ventral bisetate bundles in all segments except laterally in II. Marionina nevisensis is elevated from a subspecies of M. achaeta Lasserre, 1964 because of structural differences of their spermathecae and seminal vesicles. The ranges of M. charlottensis Coates, 1980 and M. nevisensis Coates, 1980 are extended, respectively, south to northern California and to include the entire British Columbia coastline.

Meso-scale studies on the penetration and retention of diluted bitumen in different types of shorelines, Northern British Columbia, Canada

2017 ◽  
Vol 2017 (1) ◽  
pp. 2268-2285 ◽  
Author(s):  
Sonia Laforest ◽  
Patrick Lambert ◽  
John Harper ◽  
Gary Sergy
Keyword(s):  
British Columbia ◽  
Coarse Sand ◽  
Complex Case ◽  
Accelerated Weathering ◽  
Drying Time ◽  
Adhesion Properties ◽  
Different Types ◽  
Maximum Penetration ◽  
Conventional Oil ◽  
Meso Scale

ABSTRACT 2017-210 Compared to conventional oil, diluted bitumen (dilbit) spills in the environment could be challenging due to the rapid increase in density, viscosity and adhesion properties associated with accelerated weathering. To enhance the response in case of an accidental dilbit spill in the marine environment, a Research & Development program has been developed by the Emergencies Science and Technology Section (ESTS) of Environment and Climate Change Canada (ECCC) as a part of the Federal Government’s Enhancing Marine Safety Strategy. One of the goals of this project was to develop science-based decision support for a dilbit spill to the shorelines of northern British Columbia (BC). In response to this objective, the contractor Coastal and Ocean Resources Inc. has conducted a meso-scale Diluted Bitumen Sediment Interactions Experiments (Bit_EX) to evaluate the potential of penetration and retention of dilbit in different types of sediments. In total, two dilbits, Access Western Blend (AWB) and Cold Lake Blend (CLB) at three weathered states (0%, 17% and 26% mass loss), were tested against seven types of sediments (from coarse sand to very large pebble). The adhesion of dilbit on bare cobbles and on cobbles covered with barnacles and seaweed (fucus) was also tested for different time of exposure. Results showed that unweathered (or fresh) dilbit has its maximum penetration and retention in coarse sand or granule whereas moderately weathered dilbit has maximum penetration and retention in small pebbles or larger sediment sizes. Heavily weathered dilbits have very limited penetration in finer sediments but are expected to penetrate and have high retention in permeable coarse sediments. Moreover, we have observed that dilbit adherence could be enhanced with longer drying time. In northern BC, the bedrock platforms with thin overlays of various types of sediment, from sand to boulders, are common and presents a complex case for treatment. Because dilbit characteristics change rapidly, early SCAT survey data combined with rapid decision and operational response in the initial stages of the spill could reduce dilbit retention and adhesion. The Bit_EX also suggests that existing techniques for protection and cleanup of conventional oil on shorelines could be applicable or can be adjusted for dilbit spills. This experiment provides information suitable to a first response guide for protecting and cleaning shorelines in case of bitumen spills in northern BC.

New species of Lumbricillus (Oligochaeta, Enchytraeidae) from littoral habitats of British Columbia

1981 ◽  
Vol 59 (7) ◽  
pp. 1302-1311 ◽  
Author(s):  
Kathryn Coates
Keyword(s):  
British Columbia ◽  
New Species ◽  
Small Species ◽  
Gland Cells ◽  
Intertidal Species ◽  
Wood Debris ◽  
Upper Intertidal ◽  
Intertidal Habitats ◽  
Littoral Habitats

Three new marine, intertidal species of Lumbricillus are described from oligochaete collections taken in British Columbia. Lumbricillus tsimpseanis sp.nov., which was collected in upper intertidal habitats near Prince Rupert, is similar in morphology and habitat to L. helgolandicus Michaelsen emend. Nielsen and Christensen and L. kamtschatkanus Michaelsen, but is characterized by gland cells both around the spermathecal orifice and along its ectal duct. Specimens of Lumbricillus curtus sp.nov., a small species, were collected from three well-separated silty upper intertidal habitats. It is characterized by enlarged posterior lobes of the pharyngeal (=septal) glands of 6/7 and by spermathecae which unite with the oesophagus at one-half V. Lumbricillus rupertensis sp.nov., from intertidal silty sediments with much wood debris near Prince Rupert, is similar to L. lineatus with which it was found, but is characterized by a globular ampullar expansion lateral to the connection of the spermatheca with the oesophagus.

New species of Tubificoides Lastockin (Oligochaeta; Tubificidae) from the Pacific Northeast and the Arctic

1983 ◽  
Vol 61 (6) ◽  
pp. 1270-1283 ◽  
Author(s):  
H. R. Baker
Keyword(s):  
British Columbia ◽  
New Species ◽  
The Arctic ◽  
The Pacific ◽  
Species Groups ◽  
Intertidal Habitats

Descriptions of six new species of marine or estuarine tubificid oligochaetes are given. Tubificoides kozloffi sp.nov., and Tubificoides brevicoleus sp.nov. are described from intertidal habitats of Washington and British Columbia. Tubificoides foliatus sp.nov., a species previously identified as belonging to the Tubificoides gabriellae complex, is described from California and British Columbia. Tubificoides cuspisetosus sp.nov., Tubificoides palacoleus sp.nov., and Tubificoides crenacoleus sp.nov. are described from the Arctic. A key to the species-groups of Tubificoides is given.

Memoirs: The Genital Organs of Stylaria lacustris, with an account of thier Development

1924 ◽  
Vol s2-68 (269) ◽  
pp. 147-186
Author(s):  
H. R. MEHRA
Keyword(s):  
Body Wall ◽  
Vas Deferens ◽  
Ejaculatory Duct ◽  
Body Cavity ◽  
The Body ◽  
Yolk Mass ◽  
Sperm Duct ◽  
Prostate Cells ◽  
Stylaria Lacustris ◽  
Columnar Cells

1. The genital organs of Stylaria lacustris are described in detail. The vas deferens opens into the atrium on the anterior face near the opening of the ejaculatory duct and not at the top as described by all the previous authors. The prostate surrounds not only the atrium but also the vas deferens in segment 6. 2. The prostate secretion passes through the atrial epithelium, which consequently hypertrophies and disappears 3. The development of the genital organs proceeds with great rapidity when the sexual phase appears, which occurs only once a, year from the end of September to the beginning of December. There is no long intervening period between the development of the gonads, and other genital organs. 4. The order of development seems to be connected with the time or order of their functioning. 5. The gonads are peritoneal in origin. The sperm-sac and orisac are large portions of the body-cavity enclosed by the extension backwards of septa ⅚ and 6/7 respectively. The yolk-mass is formed by a process of metabolic change in the cytoplasm of some of the ova. 6. The sperm-duct is partly peritoneal in origin and partly an ectodermal invagination. The funnel and the vas deferens rudiments arise by a proliferation of the peritoneal cells on the anterior face of septum ⅚, which assumes the form of a deeply shining plate of columnar cells with prominent nuclei. This after the funnel rudiment becomes the sperm-cord and penetrates the septum in front of the ovary, reaching near the body-wall the atrial rudiment, which is soon formed as an ec todermal invagination. The prostate cells arise from the peritoneum near the rentral body-wal1 of the sixth segment in the neighbourhood of the atrial rudiment. 7. The rudimentary female funnel, which opens ont at the female opening, arises as, an outgrowth from the peritoneum at the base of septum 6/7. 8. The spermatheca srises as an invagination from the ectoderm. I agree with Bergh that the sperm, zthecae are to be considered as new structures, and not phylogenetically connected with the genital ducts as Gatenby supposes to be the case in Tubifex rivulorum. 9. A fern stages obtained showing the development of these organs in Nais e1inguis confirm the above observntions.

New species of Bathydrilus Cook (Oligochaeta; Tubificidae) from British Columbia

1983 ◽  
Vol 61 (9) ◽  
pp. 2162-2167 ◽  
Author(s):  
H. R. Baker
Keyword(s):  
British Columbia ◽  
New Species ◽  
Shallow Water ◽  
Vancouver Island ◽  
Glandular Epithelium ◽  
Northeast Pacific ◽  
Intertidal Habitats ◽  
Shallow Water Species ◽  
Water Species

Bathydrilus litoreus n. sp., from intertidal habitats of British Columbia and Washington, is distinguished from other members of the genus by the combination of possessing histologically bipartite atria, atrial ducts, bilobed glandular sacs about the penial setae, patches of glandular epithelium between the dorsal setal bundles, and thickened epidermal pads ventrally in X. Bathydrilus torosus n. sp., from the intertidal of southwest Vancouver Island, is the only known shallow-water species of Bathydrilus to lack modified penial setae; it lacks dorsal patches of glandular epithelium and thickened epidermal pads ventrally in X but does possess atrial ducts and histologically bipartite, very muscular atria. Both B. litoreus and B. torosus lack copulatory sacs and pseudopenes. These are the first species of the genus to be described from the Northeast Pacific.

New marine species of Marionina and Enchytraeus (Oligochaeta, Enchytraeidae) from British Columbia

1980 ◽  
Vol 58 (7) ◽  
pp. 1306-1317 ◽  
Author(s):  
Kathryn Coates
Keyword(s):  
British Columbia ◽  
New Species ◽  
Pacific Coast ◽  
Marine Species ◽  
Coarse Sand ◽  
Fine Sediments ◽  
The Pacific ◽  
Unusual Combination ◽  
Upper Intertidal ◽  
Three New Species

Four new species of Marionina and one of Enchytraeus have been discovered during marine oligochaete surveys in British Columbia. Three new species of Marionina, M. vancouverensis, M. charlottensis, and M. neroutsensis, are similar to a group of other species including M. spicula (Leuckart, 1847), M. brevis Finogenova, 1977, M. istriae Giere, 1974, and M. sublittoralis Erséus, 1976. Marionina vancouverensis is estuarine; M. charlottensis is less estuarine and associated with upper intertidal algae such as Fucus and Enteromorpha; M. neroutsensis is also an upper intertidal form but from saturated fine sediments. In contrast, M. trevori has an unusual combination of generic characters separating it from other species of the genus. It was collected from coarse sand with decaying algae near a sewage outflow. Enchytraeus rupus is similar to several other small Enchytraeus species only a few of which have been found intertidally and none previously on the Pacific coast of North America.

Phallodrilus tempestatis n.sp., a new marine tubificid (Annelida: Oligochaeta) from British Columbia

1981 ◽  
Vol 59 (8) ◽  
pp. 1475-1478 ◽  
Author(s):  
H. R. Baker
Keyword(s):  
British Columbia ◽  
North Pacific ◽  
The North ◽  
Anterior Prostate ◽  
Intertidal Habitats ◽  
The North Pacific

Phallodrilus tempestatis n.sp., a marine tubificid (Annelida: Oligochaeta) from intertidal habitats of British Columbia, is characterized by frequent extension of one spermathecal ampulla into IX, the broad attachment of the anterior prostate to the atria, and the form and number of penial setae. Phallodrilus tempestatis n.sp. extends the distribution of Phallodrilus to the North Pacific.

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