Timing of Reproduction in Hymenopappus tenuifolius Pursh (Compositae), a Purported Biennial

1982 ◽  
Vol 107 (1) ◽  
pp. 185 ◽  
Author(s):  
E. A. Evans
Keyword(s):  
Timing Of Reproduction

The Optimal Timing of Reproduction

1976 ◽  
Vol 110 (975) ◽  
pp. 801-807 ◽  
Author(s):  
Dan Cohen
Keyword(s):  
Optimal Timing ◽  
Timing Of Reproduction

Timing of reproduction in a Darwin's finch: temporal opportunism under spatial constraints

Oikos ◽  
2004 ◽  
Vol 106 (3) ◽  
pp. 489-500 ◽  
Author(s):  
Michaela Hau ◽  
Martin Wikelski ◽  
Helga Gwinner ◽  
Eberhard Gwinner
Keyword(s):  
Spatial Constraints ◽  
Timing Of Reproduction

scholarly journals Timing and severity of immunizing diseases in rabbits is controlled by seasonal matching of host and pathogen dynamics

2015 ◽  
Vol 12 (103) ◽  
pp. 20141184 ◽  
Author(s):  
Konstans Wells ◽  
Barry W. Brook ◽  
Robert C. Lacy ◽  
Greg J. Mutze ◽  
David E. Peacock ◽  
...  
Keyword(s):  
Local Population ◽  
Disease Outbreaks ◽  
Maternal Antibodies ◽  
Timing Of Reproduction ◽  
Demographic Rates ◽  
Pathogen Dynamics ◽  
Rabbit Haemorrhagic Disease ◽  
Seasonal Epidemics ◽  
Haemorrhagic Disease

Infectious diseases can exert a strong influence on the dynamics of host populations, but it remains unclear why such disease-mediated control only occurs under particular environmental conditions. We used 16 years of detailed field data on invasive European rabbits ( Oryctolagus cuniculus ) in Australia, linked to individual-based stochastic models and Bayesian approximations, to test whether (i) mortality associated with rabbit haemorrhagic disease (RHD) is driven primarily by seasonal matches/mismatches between demographic rates and epidemiological dynamics and (ii) delayed infection (arising from insusceptibility and maternal antibodies in juveniles) are important factors in determining disease severity and local population persistence of rabbits. We found that both the timing of reproduction and exposure to viruses drove recurrent seasonal epidemics of RHD. Protection conferred by insusceptibility and maternal antibodies controlled seasonal disease outbreaks by delaying infection; this could have also allowed escape from disease. The persistence of local populations was a stochastic outcome of recovery rates from both RHD and myxomatosis. If susceptibility to RHD is delayed, myxomatosis will have a pronounced effect on population extirpation when the two viruses coexist. This has important implications for wildlife management, because it is likely that such seasonal interplay and disease dynamics has a strong effect on long-term population viability for many species.

Modelling pulse fishery systems in data-limited situations

2020 ◽  
Author(s):  
Arnaud Grüss ◽  
Derek G Bolser ◽  
Brad E Erisman
Keyword(s):  
Marine Fish ◽  
Mortality Rates ◽  
Marine Science ◽  
Spawning Aggregation ◽  
Fishing Mortality ◽  
Strong Basis ◽  
Timing Of Reproduction ◽  
Trade Off ◽  
Future Studies ◽  
Fisheries Science

Abstract Per-recruit models have been widely used since the onset of modern fisheries science, particularly in data-limited situations. When the study fishery is a pulse fishery, namely a fishery operating over a brief period followed by a long fallow period, exploitation rates rather than fishing mortality rates are employed to calculate per-recruit quantities. The literature suggests that a discrete per-recruit model is more appropriate than a continuous per-recruit model when per-recruit quantities are expressed as a function of exploitation rates. For this reason, Erisman et al. [Erisman, B. E., Grüss, A., Mascarenas-Osorio, I., Lícon-González, H., Johnson, A. F., and López-Sagástegui, C. 2020. Balancing conservation and utilization in spawning aggregation fisheries: a trade-off analysis of an overexploited marine fish. ICES Journal of Marine Science, 77: 148–161.] recently developed a discrete per-recruit model to examine the impacts of altering exploitation rates for the Gulf corvina (Cynoscion othonopterus) pulse fishery. Using Erisman et al.’s (Erisman, B. E., Grüss, A., Mascarenas-Osorio, I., Lícon-González, H., Johnson, A. F., and López-Sagástegui, C. 2020. Balancing conservation and utilization in spawning aggregation fisheries: a trade-off analysis of an overexploited marine fish. ICES Journal of Marine Science, 77: 148–161.) data, we demonstrate in detail that, under certain conditions, it is reasonable to employ a continuous per-recruit model for a pulse fishery system. We then use the designed continuous per-recruit model to demonstrate how the timing of the pulse fishery within the year relative to the timing of reproduction can be accounted for in a per-recruit model, and we explore the impacts of these model developments. This article serves as a strong basis for future studies that model pulse fishery systems in data-limited situations.

scholarly journals Is timing of reproduction according to temperature sums an optimal strategy?

2019 ◽  
Vol 9 (20) ◽  
pp. 11598-11605
Author(s):  
Jacob Johansson ◽  
Kjell Bolmgren
Keyword(s):  
Optimal Strategy ◽  
Timing Of Reproduction
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