Abstract Improving the efficiency of population monitoring and conservation programs is beneficial, so long as accuracy information collected not diminished. The need to expeditiously estimate size seabird colonies especially acute during mass mortality events when aerial surveys can provide quickly on extent effects total mortality. In 2022, highly pathogenic avian influenza virus caused outbreaks at most Northern Gannet Morus bassanus worldwide, killing tens thousands gannets in eastern...

Abstract Dragonflies (Odonata: Anisoptera) are an important component of both aquatic and terrestrial food webs vectors for methylmercury (MeHg) biomagnification. Variations in mercury content with life stage body regions may affect the relative transfer to or webs; however, there has been little research on this subject. Also, is known about bioaccumulation different dragonflies. To address these knowledge gaps, dragonfly naiads, adults, exuviae were collected at 2 lakes Kejimkujik National...

Background Classically, estuarine planktonic research has focussed largely on the physico-chemical drivers of community assemblages leaving a paucity information important biological interactions. Methodology/Principal Findings Within context trophic cascades, various treatments using in situ mesocosms were established closed estuary to highlight importance predation stabilizing plankton abundances. Through either removal (filtration) or addition certain groups, five different systems...

Normal (symmetrically cleaving) and abnormal (non‐symmetrically eggs were selected from four batches of three yellowtail flounder Limanda ferruginea , reared in Petri dishes as paired replicates under controlled conditions. Mortality rates significantly higher early (day 0–3) but not later 4–9) embryogenesis when compared to the normal eggs. Early larval morphology was different between two groups, larvae longer than those ( P < 0·05).

Mercury (Hg) is an important environmental contaminant, due to its neurotoxicity and ability bioaccumulate. The Arctic a mercury-sensitive region, where organisms can accumulate high Hg concentrations. Snowpack mercury photoredox reactions may control how much transported with melting snow. This work aimed (1) determine the significance of temperature combined UV irradiation intensity snow age on Hg(0) flux from (2) elucidate effect snowpack photoreduction kinetics. Using Teflon chamber,...

Striped Bass,

Abstract Spares, A.D., Reader, J.M., Stokesbury, M.J.W., McDermott, T., Zikovsky, L., Avery, T.S., and Dadswell, M.J. 2007. Inferring marine distribution of Canadian Irish Atlantic salmon (Salmo salar L.) in the North from tissue concentrations bio-accumulated caesium 137. – ICES Journal Marine Science, 64: 394–404. returning migrations to eastern Canada western Ireland during 2002 2003 were analysed for 137 (137Cs). Salmon waters demonstrated (0.20 ± 0.14 Bq kg−1 0.19 0.09 kg−1, mean s.d.,...

Abstract Sound management of a species requires, among other things, careful consideration their distribution and genetic structure throughout range. Historically, there were three spawning populations Striped Bass Morone saxatilis occurring within the Bay Fundy, Canada (Shubenacadie River, Annapolis Saint John River), but today only known population is found in Shubenacadie Nova Scotia. The last event recorded (albeit unsuccessful) River was 1975 shortly after completion Mactaquac Dam 1968....

Variation among 19 phenological features taken from 48 species of Vaccinium (Ericaceae), both in vivo and vitro as well existing literature, were subjected to several clustering strategies. Our results suggest three distinct clusters that reflect the ability these taxa tolerate frost, namely a ‘Tropical’ group 16 which no or very little frost; ‘Temperate’ whose 17 members some finally ‘Boreal-Arctic’ 15 are winter hardy.

Abstract Cucullia umbratica Linnaeus (Lepidoptera: Noctuidae), Agnippe prunifoliella Chambers Gelechiidae), and Bryotropha plantariella Tengstrom were significant bycatch in pheromone-based trapping systems for red-striped fireworm, Aroga trialbamaculella Nova Scotia, Canada. is a European introduced species new macrolepidopteran recorded continental The only previous record of this moth North America was from the Magdalen Islands (Québec, Canada). Potential attractants B. , A. C. are result...

Although parasite habitat preference is well studied, it rarely rigorously evaluated statistically because of many zero intensities. Attachment-site and intensities 2 macroectoparasite species (Caligus elongatus Calliobdella vivida) Atlantic sturgeon, Acipenser oxyrinchus Mitchill, in Minas Basin, Bay Fundy, Canada, were characterized with the use zero-inflated negative binomial statistical models that included a fork-length offset to control for body size. Three other parasites encountered,...

In 2009, the Fundy Ocean Research Centre for Energy (FORCE) developed a 1.6 x 1.0 km Crown Lease Area (CLA) to test Marine Hydrokinetic devices (MHKs) in Minas Passage (MP), strait that connects Bay of Basin (MB), Nova Scotia. is an important summer feeding aggregation site numerous fishes including Atlantic sturgeon (Acipenser oxyrinchus Mitchill, 1815) stocks from Canada and US. this study, acoustic tagging technology was used describe presence CLA, as well adjacent proposed MHKs...

With the influence of climate change on marine systems expanding, adaptation will be fundamental for future fisheries management. An exponential increase in Atlantic halibut Hippoglossus hippoglossus landings over past decade has coincided with warming ocean temperatures. Here, we explore how historical changes abundance have been linked to changing thermal habitat conditions and project trends a under different emissions scenarios. From 1990 2018, available increased by 11.6 ± 7.35% growing...

The utility of otolith elemental fingerprintsfor discriminating sub-regional stocks Atlantic salmon was examined. Otoliths were removed from smolts collected three individual river watersheds in the Canadian Maritimes during spring and analyzed for 27 elements using inductively coupled plasma mass spectrometry (ICP-MS) emission (ICP-ES). Calcium minor trace precisely measured whole otoliths at concentrations well above detection limits. Six (Ba, Pb, Li, Mn, Rb, Tl) significantlydifferent...

Based on a long-term dataset, this paper is part of series exploring the influence environmental spatial and temporal heterogeneity reproduction, recruitment, survival, movement Emydoidea blandingii (Blanding's Turtle) in Nova Scotia, at northeastern limit species' range. This population complex comprises 4 geographically discrete genetically distinguishable subpopulations that vary morphology, behavior. variation may reflect different local environments evolutionary histories underscores...

Although behavior of E. murinus was broadly described over a century ago, observations predation by are rare. Some evidence suggests that it may target sites when hunting. We report details six livestock depredation events at single locality near Puerto Maldonado, Peru. Additionally, we compare positions three radio-tagged snakes with known locations mineral licks in their home ranges and describe the relationship individual game trails. Our licks, association individuals them, suggest...

The use of staminal features as generic characters in Vaccinieae are reviewed and assessed using 108 OTUs belonging to 97 taxa, scored for 17 then subjected a variety phenetic analyses. Our results suggest that such quo genetic highly overrated any revision contemplated ought encompass much wider selection characters.

Fish consumption advisories provide valuable information on the protection of human health from contaminated fish consumption, yet are rarely conducted comprehensively nor communicated widely. Environmental policies that fail to adequately develop and implement advisory programs largely blame. This policy analysis delves into strengths weaknesses current in United States Canada. To compare between these countries, were broadly described across all 50 US states 13 Canadian...