Estimating demographic parameters in marine

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WebNov 15, 2011 · However, reliable estimates of demographic parameters such as survival and breeding probabilities are needed for modelling the risk of marine turtle population exposure to anthropogenic hazards … WebOct 1, 2015 · Introduction. Population ecologists and managers require precise and unbiased estimates of demographic parameters to ensure proper inference (Skalski et al. 2005).Mark–recapture methods are commonly used to estimate survival and other parameters (Williams et al. 2002), with radio-marking being particularly useful because …

Stochastic Population Dynamics and Life-History Variation in …

Webparameters are all input parameters for population models used to manage the species, estimate recovery times, and promote conservation measures. Sensitivity analyses have shown that proportional changes in adult and, to a smaller extent, large juvenile survival rates have the largest effect on the population growth rate for marine turtle species WebOct 3, 2024 · Our results highlight the effect of survey intensity on estimating abundance and demographic parameters of a long-lived marine top predator. All four survey effort … sql col to row

ESTIMATING DEMOGRAPHIC PARAMETERS FOR MARINE …

WebEstimating demographic parameters in marine mammals is challenging, often requiring many years of data to achieve sufficient precision to _____ biologically meaningful … WebA New Birth-Interval Approach to Estimating Demographic Parameters of Humpback Whales Jay Barlow Southwest Fisheries Science Center, [email protected] ... National Marine Fisheries Service, P.O. Box 271, La Jolla, California 92038 USA ... Abstract. A demographic model is developed based on interbirth intervals and is ap-plied to … WebJan 2, 2024 · Mark-recapture approaches are among the most powerful fisheries methods for estimating demographic parameters relating to survival, components of mortality (i.e. fishing, catch and release, or predation), and abundance. Yet conventional fisheries … sql code to check for duplicates

Estimating the Abundance of Marine Mammal …

Use made in marine ecology of methods for estimating …

WebOct 3, 2024 · Maintaining long-term studies capable of estimating demographic parameters for long-lived, slow-reproducing species is challenging. Insights into the effects of research intensity on … Implications of survey effort on estimating demographic parameters of a long-lived marine top predator WebApr 11, 2024 · Demographic studies in ecology and conservation biology form the basis for assessing population viability and managing ecological risk 1.However, estimates of key demographic parameters, such as ... sql code for less than todayWebSep 27, 2024 · Prudence is needed when using demographic parameters that are not population specific or if population size is changing and density-dependent effects have led to changes in demographic … sheriff\\u0027s name in stranger things

"WebMoreover, on average, N e estimates were negatively biased. The simulations further indicated that around 1% of the total number of individuals might have to be sampled to … " - Estimating demographic parameters in marine

Estimating demographic parameters in marine

Use made in marine ecology of methods for …

WebMay 19, 2024 · The marine phase of anadromous Atlantic salmon (Salmo salar) is the least known yet one of the most crucial with regards to population persistence. Recently, … Webchastic population dynamics (but see Rickman et al. 2000; Rose et al. 2001). One reason for this may be that obtaining adequate data on the demography of marine species is …

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Web1 hour ago · Wildfire is the primary cause of deforestation in fire-prone environments, disrupting the forest transition process generated by multiple social-ecological drivers of modernization. Given the positive feedback between climate change and wildfire-driven deforestation, it seems necessary to abstract the primary- or micro-characteristics of … WebA NEW BIRTH-INTERVAL APPROACH TO ESTIMATING DEMOGRAPHIC PARAMETERS OF HUMPBACK WHALES JAY BARLOW' AND PHILLIP J. CLAPHAM2 'Southwest Fisheries Science Center, National Marine Fisheries Service, P.O. Box 271, La Jolla, California 92038 USA ... Abstract. A demographic model is developed based on …

WebThe ability to detect trends in abundance of marine mammals is limited in many cases. Except for pinnipeds, marine mammal monitoring programs have not been able to … WebMar 1, 1997 · Utilizing a birth-interval model, Barlow and Clapham (1997) have estimated a population growth rate of 6.5% (SE = 1.2%) for the well-studied humpback whale population in the Gulf of Maine ...

WebMay 1, 2013 · In this study, we present two‐level analyses for estimating demographic parameters from data with imperfect detection of individuals and with a source of individual variability that is nested within a source of cluster variability. This method allows separating and quantifying the phenotypic plasticity or facultative behavioural responses ... WebA. Grant et al.: Estimating demographic parameters from size/frequency data 203 specified, the starting values for the component propor- tions, means and standard …

Web440 Applying Effective Population Size Estimates to Marine Species Management coalescent Ne under mutation-drift equilibrium theory. They can be influenced strongly …

WebIn view of these difficulties, we recommend that an iptimization method, such as that described by Macdonald and Pitcher, be used to estimate demographic parameters. Standard errors of estimates should be … sql combine like rowsWebAccurate estimates of demographic parameters are required to infer appropriate ecological relationships and inform management actions. Known-fate data from marked individuals are commonly used to estimate survival rates, whereas N-mixture models use count data from unmarked individuals to estimate multiple demographic … sheriff\u0027s name in blazing saddlesWebJan 29, 2024 · Color indicates the primary sources of information for parameters within the integrated population model: the parameters in green (s 1 –s 4) are informed primarily by carcass data and surrogate ... sql column reference is ambiguousWebtechniques used in studies of copepod population dynamics - a review of underlying assumptions. - Sarsia 82:279-296. Bergen. ISSN 0036-4827. The literature on Zooplankton population dynamics provides more estimation techniques than reli able estimates of population parameters. In this review we show how different techniques relate to sheriff\u0027s museum old townWebApr 3, 2024 · Managing sustainable harvest of wildlife populations requires regular collection of demographic data and robust estimates of demographic parameters. Estimates can then be used to develop a harvest strategy to guide decision-making. Mallards (Anas platyrhynchos) are an important species in the Atlantic Flyway for many users and they … sheriff\u0027s near meWebManaging sustainable harvest of wildlife populations requires regular collection of demographic data and robust estimates of demographic parameters. Estimates can then be used to develop a harvest strategy to guide decision-making. Mallards (Anas platyrhynchos) are an important species in the Atlantic Flyway for many users and they … sheriff\u0027s mounted posseWebAug 26, 2024 · 1 INTRODUCTION. Estimating contemporary population demographic parameters such as census size (N c) is fundamental to understanding a species' recent evolutionary history, and is essential for effective conservation of endangered species.The status of marine fish populations is often assessed by estimating their relative … sqlcolumnencryptionkeystoreprovider