Population Genetics, Life History, and Ecology of Arctic Marine Fishes

ARCTIC ◽  
2004 ◽  
Vol 57 (4) ◽  
Author(s):  
D.C. Hardie
Keyword(s):  
Population Genetics ◽  
Life History ◽  
Marine Fishes

Effects of geography and life history traits on genetic differentiation in benthic marine fishes

Ecography ◽  
2011 ◽  
Vol 34 (4) ◽  
pp. 566-575 ◽  
Author(s):  
Cynthia Riginos ◽  
Kristin E. Douglas ◽  
Young Jin ◽  
Danielle F. Shanahan ◽  
Eric A. Treml
Keyword(s):  
Life History ◽  
Genetic Differentiation ◽  
Life History Traits ◽  
Marine Fishes

Does mating behaviour affect connectivity in marine fishes? Comparative population genetics of two protogynous groupers (Family Serranidae)

2012 ◽  
Vol 22 (2) ◽  
pp. 301-313 ◽  
Author(s):  
D. S. Portnoy ◽  
C. M. Hollenbeck ◽  
M. A. Renshaw ◽  
N. J. Cummings ◽  
J. R. Gold
Keyword(s):  
Population Genetics ◽  
Mating Behaviour ◽  
Marine Fishes ◽  
Comparative Population

Evolution of senescence: late survival sacrificed for reproduction

1991 ◽  
Vol 332 (1262) ◽  
pp. 15-24 ◽  
Keyword(s):  
Population Genetics ◽  
Life History ◽  
Natural Selection ◽  
Antagonistic Pleiotropy ◽  
Widespread Occurrence ◽  
Disposable Soma Theory ◽  
Somatic Tissues ◽  
Competing Demands ◽  
Early Effects ◽  
Late Survival

In so far as it is associated with declining fertility and increasing mortality, senescence is directly detrimental to reproductive success. Natural selection should therefore act in the direction of postponing or eliminating senescence from the life history. The widespread occurrence of senescence is explained by observing that (i) the force of natural selection is generally weaker at late ages than at early ages, and (ii) the acquisition of greater longevity usually involves some cost. Two convergent theories are the ‘antagonistic pleiotropy’ theory, based in population genetics, and the ‘disposable soma’ theory, based in physiological ecology. The antagonistic pleiotropy theory proposes that certain alleles that are favoured because of beneficial early effects also have deleterious later effects. The disposable soma theory suggests that because of the competing demands of reproduction less effort is invested in the maintenance of somatic tissues than is necessary for indefinite survival.

scholarly journals Highlights of Medical Entomology, 2020

2021 ◽  
Author(s):  
Chris M Stone
Keyword(s):  
Population Genetics ◽  
Life History ◽  
Environmental Change ◽  
Chemical Ecology ◽  
Vector Surveillance ◽  
Vector Ecology ◽  
Medical Entomology ◽  
Professional Activities ◽  
And Control ◽  
Incredible Year

Abstract Medical Entomology as a field is inherently global – thriving on international and interdisciplinary collaborations and affected dramatically by arthropod and pathogen invasions and introductions. This past year also will be remembered as the year in which the SARS-CoV-2 COVID-19 pandemic affected every part of our lives and professional activities and impacted (or changed, sometimes in good ways) our ability to collaborate and detect or respond to invasions. This incredible year is the backdrop for the 2020 Highlights in Medical Entomology. This article highlights the broad scope of approaches and disciplines represented in the 2020 published literature, ranging from sensory and chemical ecology, population genetics, impacts of human-mediated environmental change on vector ecology, life history and the evolution of vector behaviors, to the latest developments in vector surveillance and control.

scholarly journals Empirical links between natural mortality and recovery in marine fishes

2017 ◽  
Vol 284 (1856) ◽  
pp. 20170693 ◽  
Author(s):  
Jeffrey A. Hutchings ◽  
Anna Kuparinen
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Empirical Support ◽  
Marine Fishes ◽  
Natural Mortality ◽  
Local Adaptations ◽  
Data Intensive ◽  
Recovery Potential ◽  
Threat Mitigation ◽  
Medium Time

Probability of species recovery is thought to be correlated with specific aspects of organismal life history, such as age at maturity and longevity, and how these affect rates of natural mortality ( M ) and maximum per capita population growth ( r max ). Despite strong theoretical underpinnings, these correlates have been based on predicted rather than realized population trajectories following threat mitigation. Here, we examine the level of empirical support for postulated links between a suite of life-history traits (related to maturity, age, size and growth) and recovery in marine fishes. Following threat mitigation (medium time since cessation of overfishing = 20 years), 71% of 55 temperate populations had fully recovered, the remainder exhibiting, on average, negligible change (impaired recovery). Singly, life-history traits did not influence recovery status. In combination, however, those that jointly reflect length-based mortality at maturity, M α , revealed that recovered populations have higher M α , which we hypothesize to reflect local adaptations associated with greater r max . But, within populations, the smaller sizes at maturity generated by overfishing are predicted to increase M α , slowing recovery and increasing its uncertainty. We conclude that recovery potential is greater for populations adapted to high M but that temporal increases in M concomitant with smaller size at maturity will have the opposite effect. The recovery metric documented here ( M α ) has a sound theoretical basis, is significantly correlated with direct estimates of M that directly reflect r max , is not reliant on data-intensive time series, can be readily estimated, and offers an empirically defensible correlate of recovery, given its clear links to the positive and impaired responses to threat mitigation that have been observed in fish populations over the past three decades.

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