Age, Growth, and Reproduction of the Eastern Mudminnow (Umbra pygmaea) at the Great Swamp National Wildlife Refuge, New Jersey

Frank M. Panek; Judith S. Weis

doi:10.1656/045.019.0206

Age, Growth, and Reproduction of the Eastern Mudminnow (Umbra pygmaea) at the Great Swamp National Wildlife Refuge, New Jersey

Northeastern Naturalist ◽

10.1656/045.019.0206 ◽

2012 ◽

Vol 19 (2) ◽

pp. 217-228 ◽

Cited By ~ 1

Author(s):

Frank M. Panek ◽

Judith S. Weis

Keyword(s):

New Jersey ◽

National Wildlife Refuge ◽

Wildlife Refuge ◽

Growth And Reproduction

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Hydrogeology of, simulation of groundwater flow in, and potential effects of sea-level rise on the Kirkwood-Cohansey aquifer system in the vicinity of Edwin B. Forsythe National Wildlife Refuge, New Jersey

Scientific Investigations Report ◽

10.3133/sir20175135 ◽

2018 ◽

Author(s):

Alex R. Fiore ◽

Lois M. Voronin ◽

Christine M. Wieben

Keyword(s):

New Jersey ◽

Groundwater Flow ◽

Sea Level Rise ◽

Sea Level ◽

National Wildlife Refuge ◽

Aquifer System ◽

Wildlife Refuge

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Notice: The authors have discovered an error in raw data analyzed in this paper. This article has been retracted. The corrected article is published online early as Ringelman KM, Williams CK, Castelli PM, Sieges ML, Longenecker RA, Nichols TC, Earsom AD. 2018. Estimating waterfowl carrying capacity at local scales: A case study from Edwin B. Forsythe National Wildlife Refuge, New Jersey. Journal of Fish and Wildlife Management 9(1):xx-xx; e1944-687X. doi:10.3996/082017-JFWM-066.

Journal of Fish and Wildlife Management ◽

10.3996/122016-jfwm-089 ◽

2017 ◽

Vol 8 (1) ◽

pp. 209-218

Author(s):

Kevin M. Ringelman ◽

Christopher K. Williams ◽

Paul M. Castelli ◽

Mason L. Sieges ◽

Rebecca A. Longenecker ◽

...

Keyword(s):

New Jersey ◽

Carrying Capacity ◽

Standard Error ◽

Energy Demand ◽

Population Level ◽

High Marsh ◽

Level Energy ◽

National Wildlife Refuge ◽

Time Activity ◽

Wildlife Refuge

Abstract The management of wintering North American waterfowl is based on the premise that the amount of foraging habitat can limit populations. To estimate carrying capacity of winter habitats, managers use bioenergetic models to quantify energy (food) availability and energy demand, and use results as planning tools to meet regional conservation objectives. Regional models provide only coarse estimates of carrying capacity because habitat area, habitat energy values, and temporal trends in population-level demand are difficult to quantify precisely at large scales. We took advantage of detailed data previously collected on wintering waterfowl at Edwin B. Forsythe National Wildlife Refuge and surrounding marsh, New Jersey, USA, and created a well-constrained local model of carrying capacity. We used 1,223 core samples collected between 2006 and 2015 to estimate available food. We used species-specific 24-h time-activity data collected between 2011 and 2013 to estimate daily energy expenditure, morphometrically corrected for site- and day-specific thermoregulatory costs. To estimate population-level energy demand, we used standardized monthly ground-surveys (2005–2014) to create a migration curve, and proportionally scaled that to fit aerial survey data (2005–2014). Crucially, we also explicitly incorporated estimates of variance in all of these parameters and conducted a sensitivity analysis to diagnose the most important sources of variation in the model. Our results indicated that at estimated mean levels of supply (2.34 × 109 kcal) and cumulative demand (3.4 × 109 kcal), refuge resources were depleted before the end of the wintering season. However, at one standard error greater in supply and one standard error less in demand, 1.33 × 109 kcal remained on the landscape at the end of winter. Variation in model output appeared to be driven primarily by uncertainty in food abundance in high marsh habitats. This model allows for relative assessment of biases and uncertainties in carrying capacity modeling, and serves as a framework identifying critical science needs to improve local and regional waterfowl management planning.

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