Browsing Biology by Title
Now showing items 55-74 of 228
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Effect of Coronary Ablation and Adrenergic-Stimulation on In-Vivo Cardiac-Performance in Trout (Oncorhynchus-Mykiss)
(1994-01)In fish, catecholamine-induced changes in cardiac performance in vivo are the result of complex interactions between the direct adrenergic effects on the heart and peripheral circulation and the reflex responses to increased ... -
Effects of eutrophication, grazing, and algal blooms on rocky shores
(2006-01)Eutrophication can profoundly change rocky shore communities. These changes often cause the replacement of perennial, canopy-forming algae such as Fucus spp. with annual, bloom-forming algae such as Enteromorpha spp. ... -
The energetics of male reproduction in an acquatically mating pinniped, the harbour seal
(1998-07)The energy expenditure of breeding male harbour seals, Phoca vitulina, on Sable Island, Nova Scotia, was investigated by measuring changes in body mass, body composition, and water flux using isotope dilution. Seals lost ... -
Entombed Plant-Communities Released by a Retreating Glacier at Central Ellesmere Island, Canada
(1984)No abstract available. -
Estimating fertilization success in marine benthic invertebrates: A case study with the tropical sea star Oreaster reticulatus
(2002-01)Several factors can influence fertilization success, and for marine broadcast spawners, the main constraint is rapid dilution of gametes. Because the measurement of fertilization success in the field is logistically ... -
Estimation of growth rate, production and age of the marine angiosperm Thalassia testudinum König
(University of Puerto Rico, 1973)There is a linear relation between average growth rate and the average maximum leaf length of Thalassia stands. The ratio production-to-standing crop (wet weight including epiphytes) tends to be constant. New foliage leaves ... -
Estimation of Temporal Variability in Populations
(1995-10)A common measure of the temporal variability of a population is the standard deviation of the logarithms of successive estimated population sizes, In(D-t). This measure overestimates true temporal variability (the standard ... -
Estimation of total body water in pinnipeds using hydrogen-isotope dilution
(1998-05)No abstract available. -
Evaluation of low external input, sustainable farming practices for livestock farms in Cumberland County
(REAP-Cumberland, Shinimicas, Nova Scotia, 1993-06-01)Existing livestock systems in Cumberland Co. rely mainly on grass, clover and spring cereals for home grown forage and grain. There are well known limitations to these systems on the fragipan or basil till soils which ... -
Evolutionary and ecological feedbacks of the survival cost of reproduction
(2012-04)Arguably the most fundamental of trade-offs in life-history evolution is the increase in natural mortality resulting from sexual maturity and reproduction. Despite its central importance, this increase in mortality, a ... -
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An experimental test of offspring recognition in Western Bluebirds
(1995-10)No abstract available. -
Faba bean: an alternative to soybean in Nova Scotia, Canada.
(Borkhauser Verlag: Basel, Boston, Stuttgart., 1982-01-01)For farmers in Nova Scotia who wish to be self-sufficient in animal feed, and in N fertilizer, the faba bean offers a number of advantages over soybean: (i) no special processing is required; (ii) nodulation is generally ... -
Farms as ecosystems
(University Extension Press, University of Saskatchewan, Saskatoon, 1999)Organic farming provides ecosystem services as well as food. The weakest points of organic farming systems are limited use of livestock and declining genetic resources. Organic farming has special research and service ... -
Fatty acid profiles in the gonads of the sea urchin Strongylocentrotus droebachiensis on natural algal diets
(2008)We examined fatty acid (FA) compositions of gonads of the green sea urchin Strongylocentrotus droebachiensis collected from a grazing aggregation (front) at the edge of a kelp bed and from barrens dominated by coralline ... -
Fatty acids as dietary tracers in benthic food webs
(Inter-Research, Nordbuente 23 Oldendorf/Luhe 21385 Germany, 2011)Fatty acid (FA) analysis is a well-established tool for studying trophic interactions in marine habitats. However, its application to benthic food webs poses 2 particular challenges. First, unlike pelagic zooplankton, ... -
Fatty acids tracers for native and invasive macroalgae in an experimental food web
(2009)We assessed the potential of fatty acid (FA) markers for tracing primary production from an invasive green alga (Codium fragile ssp. fragile) and a native kelp (Saccharina longicruris) through 2 trophic levels in an ... -
Fecal production by sea urchins in native and invaded algal beds
(2009)To examine the role of fecal production by the sea urchin Strongylocentrotus droobachiensis in native and invaded algal assemblages in Nova Scotia, Canada, we examined the quantity (production rate by urchin feeding ... -
Fisheries Stock Assessment: an inductive science with the Logical form of Primitive Magic
(2010-01-20)Abstract. A logical analysis of the common fisheries models used in stock assessment has shown that they produce specific predictions with the logical form of existential statements, fail Karl Popper’s falsifiability ... -
Food-Web Structure of Seagrass Communities across Different Spatial Scales and Human Impacts
(2011-07)Seagrass beds provide important habitat for a wide range of marine species but are threatened by multiple human impacts in coastal waters. Although seagrass communities have been well-studied in the field, a quantification ...