Observations on Phaeosaccion collinsii in culture

1971 ◽  
Vol 49 (4) ◽  
pp. 563-566 ◽  
Author(s):  
J. McLachlan ◽  
L. C.-M. Chen ◽  
T. Edelstein ◽  
J. S. Craigie
Keyword(s):  
Life History ◽  
Nova Scotia ◽  
Water Temperature ◽  
Spore Germination ◽  
Light Intensities ◽  
History Of ◽  
Single Locality

The life history of Phaeosaccion collinsii Farlow, a species which is known from a single locality in Nova Scotia, has been completed in culture. There was no indication of a sexual phase and zoospores gave rise directly to the tubular thallus. Completion of the life history occurred at 5 °C only. At higher temperatures spores failed to germinate, or growth and differentiation were suppressed. Light intensities exceeding 100 ft-c inhibited spore germination, although growth and differentiation were not similarly affected. In nature mature plants occur sublittorally, and are present only in spring when the water temperature is around 5 °C. Zoospore flagellation is of the typical heterokont type with the flimmer bearing bilateral hairs. On this basis P. collinsii can be placed either in the Chrysophyceae or Phaeophyceae.

Description of the pupa and observations on the distribution, ecology, and life history of Quedius spelaeus spelaeus Horn (Coleoptera: Staphylinidae) in Nova Scotia, Canada

Zootaxa ◽  
2006 ◽  
Vol 1226 (1) ◽  
pp. 61 ◽  
Author(s):  
MAX MOSELEY ◽  
JAN KLIMASZEWSKI ◽  
CHRISTOPHER G. MAJKA
Keyword(s):  
Life History ◽  
Nova Scotia ◽  
Glacial Refugia ◽  
Disjunct Distribution ◽  
Late Instar ◽  
History Of ◽  
First Time

The troglophilic staphylinid beetle Quedius spelaeus spelaeus Horn 1871, has been found in a number of porcupine dung caves in Nova Scotia where it appears to be the dominant predator on other invertebrates. In culture, late-instar larvae were observed to excavate and remain in cavities excavated in dung, and to pupate in these cavities. The pupa is described for the first time and compared with other pupae in the genus Quedius Stephens. The apparently disjunct distribution of the species in Nova Scotia is discussed and it is suggested that it may have colonized the province from Atlantic glacial refugia.

scholarly journals THE LIFE-HISTORY OF THE SPINED RUSTIC, BARATHRA CURIALIS, SMITH

1906 ◽  
Vol 38 (12) ◽  
pp. 381-384
Author(s):  
James Fletcher ◽  
Arthur Gibson
Keyword(s):  
Life History ◽  
Nova Scotia ◽  
Lake Superior ◽  
The Body ◽  
Wide Area ◽  
History Of

In the Report of the Entomologist and Botanist to the Dominion Experimental Farms for 1905, at pages 179 and 180, considerable space is given to a discussion of an outbreak of a large noctuid caterpillar, which appeared in considerable numbers in Canada during 1905. Complaints of injury by this insect were received from a wide area, extending from Nova Scotia as far west as Lake Superior. During July many kinds of plants in gardens were attacked by smooth cutworm-like caterpillas, which when small were greenish in colour, having the body divided into two equal areas above and below the spiracles by a wide black stigmatal band.

Studies on the Life-History of the Ascarid Porrocaecum decipiens in the Bras d'Or Lakes, Nova Scotia, Canada

1960 ◽  
Vol 17 (6) ◽  
pp. 763-774 ◽  
Author(s):  
D. M. Scott ◽  
W. F. Black
Keyword(s):  
Life History ◽  
Nova Scotia ◽  
Intermediate Host ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Phoca Vitulina ◽  
Halichoerus Grypus ◽  
Grey Seal ◽  
Important Food ◽  
History Of

Larvae of the parasitic ascarid (Porrocaecum decipiens) occurred commonly in the musculature and viscera of Atlantic cod (Gadus morhua) in the Bras d'Or Lakes. They were also present in the musculature of nine other species of teleosts and probably also in the viscera of skates (Raja sp.). Most larvae were longer than 20 mm. None was shorter than 10 mm, a fact which suggested the existence of some earlier intermediate host, probably an invertebrate. More than 8,000 mysids, an important food of fishes when they first become infected, were examined for nematodes. Although 110 nematodes were found, only one certainly and four dubiously appeared to be Porrocaecum. The definitive hosts were the harbour seal (Phoca vitulina) and the grey seal (Halichoerus grypus). The distribution of seals coincided with local variations in the incidence of the parasite in cod.

scholarly journals EFFECTS OF SAND BAR GEOMORPHOLOGY AND WATER TEMPERATURE ON LIFE HISTORY OF CLAM IN THE BANJO ESTUARY

2005 ◽  
Vol 49 ◽  
pp. 1357-1362
Author(s):  
Satoquo SEINO ◽  
Makoto HIGASHINO ◽  
Tohru TAKAMI ◽  
Hanae HIRASHIMA ◽  
Yoshiaki NAKASHIGE ◽  
...  
Keyword(s):  
Life History ◽  
Water Temperature ◽  
History Of ◽  
Sand Bar

Cycles de développement de Skistodiaptomus oregonensis, Tropocyclops prasinus et Cyclops scutifer dans la zone limnétique du lac Cromwell, Saint-Hippolyte, Québec

1982 ◽  
Vol 60 (2) ◽  
pp. 139-151 ◽  
Author(s):  
Michèle Paquette ◽  
Bernadette Pinel-Alloul
Keyword(s):  
Life History ◽  
Life Cycle ◽  
Water Temperature ◽  
Food Availability ◽  
Development Times ◽  
Decisive Importance ◽  
History Of ◽  
Cyclops Scutifer

A study of the life history of the three principal copepods (Skistodiaptomus oregonensis, Tropocyclops prasinus, Cyclops scutifer) in Lake Cromwell, Québec, demonstrated that these species are multivoltine. Skistodiaptomus oregonensis and T. prasinus have analogous life cycle strategies with two cohorts produced annually and active winter diapause as instar CV and adult; however, their reproductive periods are 2 months apart (May and July). Cyclops scutifer has two summer cohorts and a winter cohort without active diapause. The development times of cohorts are strongly related to water temperature but food availability and water oxygenation could also be of decisive importance for the development of summer cohorts.

THE LIFE HISTORY OF ALLOTROPA UTILIS MUES., A HYMENOPTEROUS PARASITE OF THE ORCHARD MEALY BUG IN NOVA SCOTIA

1939 ◽  
Vol 71 (7) ◽  
pp. 160-163 ◽  
Author(s):  
F. C. Gilliatt
Keyword(s):  
Life History ◽  
New Species ◽  
Nova Scotia ◽  
Hymenopterous Parasite ◽  
History Of ◽  
Mealy Bug ◽  
A New Species

Soon after the discovery of the mealy bug Phenacoccus aceris Sig. in the orchards of Nova Scotia in 1932, a parasite of much importance was found attacking this pest. This is a small hymenopterous species described in this issue by Dr. C. F. W. Muesebeck as a new species, Allotropa utilis Mues.

Laboratory Studies on Some Factors in the Life-history of the Predacious Mite Typhlodromus tiliae Oudms. (Acarina: Phytoseiidae)

1956 ◽  
Vol 88 (12) ◽  
pp. 701-704 ◽  
Author(s):  
H. J. Herbert
Keyword(s):  
Life History ◽  
Nova Scotia ◽  
Laboratory Studies ◽  
Predacious Mites ◽  
Predacious Mite ◽  
European Red Mite ◽  
History Of

Among the important predators of the European red mite, Metatetranychus ulmi (Koch), in Nova Scotia is a group of predacious mites belonging to the subfamily Phytoseiinae. There is little information in the literature on the biology of the species in this subfamily. Smith and Summers (1949) reported on the bionomics of “Hypoaspis” macropilis (Banks), and Herbert (1952) and Ballard (1953) on the life-history of Typhlodromus fallacis (Garm.).

Effects of climate‐induced water temperature changes on the life history of brachyuran crabs

2019 ◽  
Vol 12 (2) ◽  
pp. 1211-1216 ◽  
Author(s):  
Mohamad N. Azra ◽  
Mohd Amran Aaqillah‐Amr ◽  
Mhd Ikhwanuddin ◽  
Hongyu Ma ◽  
Khor Waiho ◽  
...  
Keyword(s):  
Life History ◽  
Water Temperature ◽  
Temperature Changes ◽  
History Of ◽  
Brachyuran Crabs

Aspects of the life history and ecology of Porphyra linearis (Bangiales, Rhodophyceae) in nature

1973 ◽  
Vol 51 (12) ◽  
pp. 2371-2379 ◽  
Author(s):  
C. J. Bird
Keyword(s):  
Thin Films ◽  
Life History ◽  
Nova Scotia ◽  
Littoral Zone ◽  
Vegetative Reproduction ◽  
Sea Temperature ◽  
Standing Water ◽  
Sublittoral Zone ◽  
History Of ◽  
Increasing Temperature

The life history of P. linearis Grev. in nature was studied for 2 years at Sandy Cove, Halifax County, Nova Scotia, Conchospores of this winter alga were present in the supralittoral zone as early as August, although thalli were not visually apparent until mid-October to late October. The first major deposition of conchospores coincided approximately with decreasing sea temperature at 13–14 °C. Spores were deposited throughout the winter until March, when sporulation presumably declined and few new thalli appeared on the study site. A few conchospores were retrieved from the supralittoral zone in April, when extant thalli were bleached or moribund, and as late as June, after the population had died. Conchocelis of P. linearis was not found in the supralittoral habitat of the leafy phase, but several specimens were located at a depth of 9 m in the sublittoral zone near the study site. Leafy thalli became fertile 3–5 weeks after their appearance on the site, and were largely dioecious; broader thalli in the upper littoral zone were frequently monoecious, and displayed α- and β-spores simultaneously. Development of the population was enhanced by thin films of moisture but not by standing water such as tide pools; nor did young P. linearis thrive in Ulothrix flacca – Urospora penicilliformis associations. Death of leafy thalli in spring appeared to result from an interaction of increasing temperature and photoperiod. Alternation of the leafy phase with conchoecelis is obligatory in P. linearis; vegetative reproduction by neutral spores was not observed, and thalli did not perennate via the remnants of basal portions which sometimes persisted through the summer. Intergradation of P. linearis with P. umbilicalis is discussed.

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