scholarly journals Better the devil you know: common terns stay with a previous partner although pair bond duration does not affect breeding output

2017 ◽  
Vol 284 (1846) ◽  
pp. 20161424 ◽  
Author(s):  
Maren Rebke ◽  
Peter H. Becker ◽  
Fernando Colchero
Keyword(s):  
Bond Length ◽  
Reproductive Performance ◽  
Pair Bond ◽  
Common Tern ◽  
Individual Heterogeneity ◽  
Monogamous Species ◽  
The Common ◽  
The Individual ◽  
The Devil ◽  
Pair Level

In a monogamous species two partners contribute to the breeding process. We study pair formation as well as the effect of pair bond length and age on breeding performance, incorporating individual heterogeneity, based on a high-quality dataset of a long-lived seabird, the common tern ( Sterna hirundo ). To handle missing information and model the complicated processes driving reproduction, we use a hierarchical Bayesian model of the steps that lead to the number of fledglings, including processes at the individual and the pair level. The results show that the age of both partners is important for reproductive performance, with similar patterns for both sexes and individual heterogeneity in reproductive performance, but pair bond length is not. The terns are more likely to choose a former partner independent of the previous breeding outcome with that partner, which suggests a tendency to retain the partner chosen at the beginning of the breeding career.

The Red Neuronal Pigment in the Nervous System of the Mussel, Mytilus Edulis: Localization and Its Effect on Lateral Ciliary Activity with Spectral and Analytical Changes

1981 ◽  
Vol 39 ◽  
pp. 494-495
Author(s):  
Anthony A. Paparo ◽  
Judith A. Murphy
Keyword(s):  
Nervous System ◽  
Mytilus Edulis ◽  
Neuronal Cell ◽  
Ciliary Activity ◽  
Neuronal Cell Bodies ◽  
The Central Nervous System ◽  
Intracellular Organelles ◽  
The Common ◽  
The Individual ◽  
Cryostat Sections

The purpose of this study was to localize the red neuronal pigment in Mytilus edulis and examine its role in the control of lateral ciliary activity in the gill. The visceral ganglia (Vg) in the central nervous system show an over al red pigmentation. Most red pigments examined in squash preps and cryostat sec tions were localized in the neuronal cell bodies and proximal axon regions. Unstained cryostat sections showed highly localized patches of this pigment scattered throughout the cells in the form of dense granular masses about 5-7 um in diameter, with the individual granules ranging from 0.6-1.3 um in diame ter. Tissue stained with Gomori's method for Fe showed bright blue granular masses of about the same size and structure as previously seen in unstained cryostat sections.Thick section microanalysis (Fig.l) confirmed both the localization and presence of Fe in the nerve cell. These nerve cells of the Vg share with other pigmented photosensitive cells the common cytostructural feature of localization of absorbing molecules in intracellular organelles where they are tightly ordered in fine substructures.

What Can Economists Contribute to the Common Good Tradition?

2017 ◽  
Author(s):  
Andrew M. Yuengert
Keyword(s):  
Common Good ◽  
Common Pool Resources ◽  
Economic Approach ◽  
Public And Private ◽  
Private Provision ◽  
The Public ◽  
The Common Good ◽  
The Common ◽  
The Individual ◽  
Insight Into

Although most economists are skeptical of or puzzled by the Catholic concept of the common good, a rejection of the economic approach as inimical to the common good would be hasty and counterproductive. Economic analysis can enrich the common good tradition in four ways. First, economics embodies a deep respect for economic agency and for the effects of policy and institutions on individual agents. Second, economics offers a rich literature on the nature of unplanned order and how it might be shaped by policy. Third, economics offers insight into the public and private provision of various kinds of goods (private, public, common pool resources). Fourth, recent work on the development and logic of institutions and norms emphasizes sustainability rooted in the good of the individual.

Punk as Folk: Continuities and Tensions in the UK and Beyond

2020 ◽  
Author(s):  
Pete Dale
Keyword(s):  
Folk Music ◽  
Music Making ◽  
Collective Creativity ◽  
Living Tradition ◽  
Wide Range ◽  
The Us ◽  
The Common ◽  
The Individual ◽  
The Uk

Numerous claims have been made by a wide range of commentators that punk is somehow “a folk music” of some kind. Doubtless there are several continuities. Indeed, both tend to encourage amateur music-making, both often have affiliations with the Left, and both emerge at least partly from a collective/anti-competitive approach to music-making. However, there are also significant tensions between punk and folk as ideas/ideals and as applied in practice. Most obviously, punk makes claims to a “year zero” creativity (despite inevitably offering re-presentation of at least some existing elements in every instance), whereas folk music is supposed to carry forward a tradition (which, thankfully, is more recognized in recent decades as a subject-to-change “living tradition” than was the case in folk’s more purist periods). Politically, meanwhile, postwar folk has tended more toward a socialist and/or Marxist orientation, both in the US and UK, whereas punk has at least rhetorically claimed to be in favor of “anarchy” (in the UK, in particular). Collective creativity and competitive tendencies also differ between the two (perceived) genre areas. Although the folk scene’s “floor singer” tradition offers a dispersal of expressive opportunity comparable in some ways to the “anyone can do it” idea that gets associated with punk, the creative expectation of the individual within the group differs between the two. Punk has some similarities to folk, then, but there are tensions, too, and these are well worth examining if one is serious about testing out the common claim, in both folk and punk, that “anyone can do it.”

scholarly journals Evolution of innate and adaptive immune genes in a non-model waterbird, the common tern

2021 ◽  
pp. 105069
Author(s):  
Piotr Minias ◽  
Joanna Drzewińska-Chańko ◽  
Radosław Włodarczyk
Keyword(s):  
Common Tern ◽  
Immune Genes ◽  
Adaptive Immune ◽  
The Common

scholarly journals Experimental evidence for a causal effect of pair-bond duration on reproductive performance in oystercatchers (Haematopus ostralegus)

2006 ◽  
Vol 17 (6) ◽  
pp. 982-991 ◽  
Author(s):  
Martijn van de Pol ◽  
Dik Heg ◽  
Leo W. Bruinzeel ◽  
Bram Kuijper ◽  
Simon Verhulst
Keyword(s):  
Experimental Evidence ◽  
Reproductive Performance ◽  
Causal Effect ◽  
Pair Bond ◽  
Haematopus Ostralegus

ON THE NEST AND EGGS OF THE COMMON TERN (S. FLUVIATILIS). A THIRD COOPERATIVE STUDY

Biometrika ◽  
1923 ◽  
Vol 15 (3-4) ◽  
pp. 294-345
Author(s):  
D. M. S. WATSON ◽  
KATHERINE M. WATSON ◽  
HELGA S. PEARSON ◽  
M. NOEL KARN ◽  
J. O. IRWIN ◽  
...  
Keyword(s):  
Common Tern ◽  
Cooperative Study ◽  
The Common

Can Communities Protect Autonomy? Ethical Dilemmas in HIV Preventative Drug Trials

1995 ◽  
Vol 4 (4) ◽  
pp. 516-523 ◽  
Author(s):  
Deborah Zion
Keyword(s):  
Advance Directive ◽  
Common Good ◽  
Ethical Dilemmas ◽  
Drug Trials ◽  
The Common Good ◽  
Gay Community ◽  
The Common ◽  
The Individual ◽  
Trial Participants

Before sailing past the sirens' “flowery meadow,” Ulysses instructed his sailors to lash him to the mast so that he would not succumb to the siren's singing. His advance directive demonstrated that he valued his dispositional or long-term autonomy over his unquestioned right to make decisions. He also indicated to his oarsmen that he understood the nature of temptation and his inability to resist it. Ideas of autonomy and sexual choice are central to this discussion of new AIDS treatments, especially the trials of preventative vaccines. Questions arise over the rights of individuals and the extent that these should be limited by concerns of the gay community. Should the gay community intervene in the risky decisions of individuals if no explicit advance directive exists? If so, how do they justify their paternalism? Could their aims not be better served through strengthening the individual dispositional autonomy of trial participants rather than making specific claims about the common good?

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