Small-scale spatial variation in age and size

WebJul 1, 2024 · This study was designed to determine the size and age at which channeled whelk mature, evaluate whether there are differences by sex and area, and to determine … WebJul 24, 2006 · Introduction. Spatial variation in demography and population growth rate (λ) is predicted to play a major part in determining the structure and dynamics of populations (Pulliam 1988; Rodenhouse, Sherry & Holmes 1997; Hanski 1999).For example, small-scale variation in territory quality can drive pre-emptive occupation of the most productive …

Spatio-Temporal Variation in Age Structure and Abundance of the …

WebJan 5, 2024 · interactions typically generate small-scale spatial structure that occurs at a length scale of the order one to ten times an individual’s size. Despite being local in origin, spatial structure can have signi cant large-scale e ects on population size, and even determine whether the population survives or dies (Law et al., 2003). WebSep 28, 2016 · Spatial variation in age structure can develop over time for at least two reasons. First, if recruitment is limited within a local population, then over time individuals will age and older individuals will disproportionately make up the local population in the absence of immigration [ 10 ]. dvd fisherman\u0027s friends https://wakehamequipment.com

Spatial variation in demography and population growth …

WebDec 31, 2012 · Here we utilize CFR to explore spatial variability in life history and demography of the rocky reef-associated grass rockfish (Sebastes rastrelliger) in the … WebUnderstanding the pattern and magnitude of spatial variation in demography and population growth rate (λ) is key to understanding the structure and dynamics of natural populations. However, such spatial variation is challenging to quantify. We use > 20 years of individual life-history data to quantify small- and large-scale spatial variation in WebJul 1, 2024 · The spatial scale of the Massachusetts channeled whelk fishery is relatively small, with all catch occurring within the southern extent of state waters. Massachusetts has sole management authority of the channeled whelk resource within state waters, and focuses on input controls including minimum legal size, limited license entry, trap limits ... dvd fireproof

Spatial Epidemiology: Current Approaches and Future Challenges

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Small-scale spatial variation in age and size

Small-scale spatial and temporal variation of life …

WebJul 19, 2024 · Spatial and Temporal Variation in Length-Weight Relationships of Age-0 Scaphirhynchus Sturgeon in the Lower Missouri River The American Midland Naturalist covers a diverse set of biological disciplines (animal sciences, plant sciences, ecology) as they pertain to North America. WebTo investigate how tillage intensity modifies the small-scale spatial variability of soil and winter wheat parameters, field trials were conducted on small plots (12 m × 35 m) in three temperate environments in the Swiss midlands: Zollikofen in 1999 (loamy silt soil; Gleyic Cambisol) and Schafisheim in 1999 and in 2000 (sandy loam soil; Orthic Luvisol). …

Small-scale spatial variation in age and size

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WebMar 21, 2024 · We studied the spatio-temporal variation of adult life-history traits linked to age and body size in the common frog ( Rana temporaria) from low (i.e., valley at 480 m … WebApr 11, 2024 · Childhood undernutrition is a major public health challenge in sub-Saharan Africa, particularly Nigeria. Determinants of child malnutrition may have substantial spatial heterogeneity. Failure to account for these small area spatial variations may cause child malnutrition intervention programs and policies to exclude some sub-populations and …

WebThe spatial variation in risk of MS was estimated by kernel regression. Results: We identified spatial variation in the risk of MS according to residence at birth, age 15, and onset of … WebFaces in the wild may contain pose variations, age changes, and with different qualities which significantly enlarge the intra-class variations. Although great progresses have been made in face recognition, few existing works could learn local and multi-scale representations together. In this work, we propose a new model, called Local and multi …

WebFeb 1, 2024 · The fact that the scales increase with decreasing strength of density regulation is further illustrated by Fig. 3 showing the factors G ij1 and G ij2 in Eq. (6) multiplied by the … WebFeb 1, 2014 · To characterize exposures to particulate matter (PM) and its components, we performed a large sampling study of small-scale spatial variation in size-resolved particle …

WebThis variation in body size over a small spatial scale appears to be coupled with changes in age-related parameters, with earlier age of maturity and shorter longevities in dwarf populations of the newt T. pygmaeus(Díaz- Paniagua et al. 1996).

WebJul 24, 2006 · Introduction. Spatial variation in demography and population growth rate (λ) is predicted to play a major part in determining the structure and dynamics of populations … dvd firehouse dogWebAbstract – This study documents substantial small-scale spatial variation in age and size at maturity of brown trout (Salmo trutta) found either in allopatry (above major waterfalls) … dvd fishingWebDec 24, 2024 · INTRODUCTION. Gene flow is an important evolutionary parameter ultimately determining the spatial extension in which individuals share a common gene pool and the amount of genetic subdivision (Wright, 1946).Unlike mutation that creates new variation, gene flow is the exchange of alleles among populations promoting the income of allelic … dustin hartley springdale police officerWebSpatial scale is a specific application of the term scale for describing or categorizing (e.g. into orders of magnitude) the size of a space (hence spatial), or the extent of it at which a … dvd first blood promoWebJul 16, 2013 · Despite long planktonic durations, many species of broadcast spawning invertebrates exhibit genetic structure at small spatial and temporal scales. Amplified fragment length polymorphisms were used to assess genetic variation in the sea scallop, Placopecten magellanicus, among four inshore and one offshore location in the Gulf of … dvd first came outWebAug 24, 2024 · A small divergent group, which seems partly related to fish size, was noted at both spatial and temporal scales. Based on these results and before embarking on a study of population structure using otolith … dvd first wives clubWebHowever, such spatial variation is challenging to quantify. We use>20 years of individual life-history data to quantify small- and large-scale spatial variation in demography and lambda within a single population of red-billed choughs Pyrrhocorax pyrrhocorax on Islay, Scotland. dustin heard blackwater