Overwinter Survival of Age-0 Gizzard Shad in Missouri Reservoirs Spanning a Productivity Gradient: Roles of Body Size and Winter Severity

2010 ◽  
Vol 139 (1) ◽  
pp. 241-256 ◽  
Author(s):  
Paul H. Michaletz
Keyword(s):  
Body Size ◽  
Gizzard Shad ◽  
Overwinter Survival ◽  
Productivity Gradient ◽  
Winter Severity

Effect of larval body size on overwinter survival and emerging adult size in the burying beetle, Nicrophorus investigator

2002 ◽  
Vol 80 (9) ◽  
pp. 1588-1593 ◽  
Author(s):  
Rosemary J Smith
Keyword(s):  
Body Size ◽  
Parental Care ◽  
Emerging Adults ◽  
Survival Data ◽  
Life Stage ◽  
Large Body ◽  
Winter Period ◽  
Adult Size ◽  
Larval Size ◽  
Overwinter Survival

Body size may influence both adult fecundity and the probability of survival through each life stage. Previous studies of burying beetles (Nicrophorus, Coleoptera: Silphidae) have revealed reproductive advantages for larger adults and the role of parental care in determining larval size and number. In this study I measure the effect of size on survival over the winter period and the correlation between larval size and the size of emerging adults. I collected data from 24 groups of 20–25 larvae sorted by size and overwintered outside under natural conditions in Colorado, U.S.A. There was a significant positive correlation between larval size and adult size at emergence and a significant effect of size on overwinter survival. Data from 2 years yielded the following mean survival rates: small, 47.3 ± 1.0%; medium, 73.2 ± 0.7%; large, 85.7 ± 0.4%. These values were then used to accurately predict adult emergence from broods of larvae whose range of size was measured prior to the overwinter period. The results indicate that selection for large body size may result from an overwinter survival advantage and not just from reproductive success. This has implications for fitness models of parental care and models of population dynamics.

scholarly journals The effect of variable winter severity on size-dependent overwinter mortality caused by acute thermal stress in juvenile red drum (Sciaenops ocellatus)

2013 ◽  
Vol 71 (4) ◽  
pp. 1010-1021 ◽  
Author(s):  
Deena A. Anderson ◽  
Frederick S. Scharf
Keyword(s):  
Body Size ◽  
Prolonged Exposure ◽  
Cold Front ◽  
Red Drum ◽  
Sciaenops Ocellatus ◽  
Coastal Fisheries ◽  
Size Dependent ◽  
Northern Edge ◽  
Overwinter Mortality ◽  
Winter Severity

Abstract Mortality during winter can impact the population dynamics of fish at temperate latitudes. The red drum (Sciaenops ocellatus) supports valuable coastal fisheries throughout its range in the southeastern United States. At the northern edge of its distribution, severe winters may cause considerable overwinter loss and size-selective mortality among juveniles. We conducted a series of laboratory experiments to quantify overwinter survivorship of age 0 fish. To determine thermal tolerance, fish were exposed to various minima (1, 3, or 5°C) for up to 14 d. The effect of winter severity on survivorship was then evaluated by exposing fish to simulated cold-front events of varying frequency and duration. Body size was incorporated as a factor into each set of experiments. Age 0 red drum were intolerant of even brief exposure to temperatures ≤3°C and experienced mortality after prolonged exposure to 5°C. Higher frequency of simulated cold-front events impacted survivorship more than longer-event duration, and recovery time between events improved survivorship. Size-dependent mortality was only evident for fish exposed to mild and moderate winter severity conditions, with larger fish surviving longer. For juvenile red drum, severe winters may cause high mortality independent of body size, whereas size-dependent year-class restructuring may occur during milder winters.

Gizzard Shad Target Strength‐to‐Body Size Equations at Multiple Hydroacoustic Frequencies

2021 ◽  
Author(s):  
Garret R. Johnson ◽  
Rebecca A. Dillon ◽  
Richard D. Zweifel ◽  
Stuart A. Ludsin ◽  
Joseph D. Conroy
Keyword(s):  
Body Size ◽  
Target Strength ◽  
Gizzard Shad

scholarly journals Body Mass and Winter Severity as Predictors of Overwinter Survival in Preble's Meadow Jumping Mouse

2009 ◽  
Vol 90 (1) ◽  
pp. 17-24 ◽  
Author(s):  
Robert A. Schorr ◽  
Paul M. Lukacs ◽  
Gregory L. Florant
Keyword(s):  
Body Mass ◽  
Overwinter Survival ◽  
Winter Severity
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