scholarly journals Causes of embryonic mortality in Espadarana prosoblepon (Anura: Centrolenidae) from Costa Rica

2020 ◽  
Vol 19 (1) ◽  
pp. 83-92
Author(s):  
Johana Goyes Vallejos ◽  
Karim Ramirez-Soto

Causes of embryonic mortality in Espadarana prosoblepon (Anura: Centrolenidae) from Costa Rica. Members of the family Centrolenidae—commonly known as “glass frogs”—exhibit arboreal egg-laying behavior, depositing their clutches on riparian vegetation. Few studies have investigated specific causes of mortality during embryonic stages, perhaps the most vulnerable stage during the anuran life cycle. The Emerald Glass Frog, Espadarana prosoblepon, was used as a case study to investigate the causes of embryonic mortality in a species with short-term (i.e., less than 1 day) parental care. The specific sources of mortality of eggs of E. prosoblepon were quantified and overall rates of survival (hatching success) were estimated. Nineteen egg clutches were transferred from permanent outside enclosures to the wild. Clutch development was monitored daily until hatching; five mortality causes were quantified: desiccation, failure to develop, fungal infection, predation, and “rain-stripped.” The main causes of mortality were predation (often by katydids and wasps) and embryos stripped from the leaf during heavy rains. The results were compared to those of previous studies of centrolenids exhibiting parental care, and discussed in the context of the importance of the natural history data for these frogs with regard to understanding the evolutionary history of parental care in glass frogs.

Diversity ◽  
2018 ◽  
Vol 10 (3) ◽  
pp. 84 ◽  
Author(s):  
Henry Hespenheide

A brief review of the history of the taxonomic treatment of the genus Philenis Champion is presented and characters are discussed. Philenisflavipes Champion and P.fuscofemorata Champion, and 11 new species are described, including the first records from South America: P.anzaldoinewspecies (Costa Rica, Panamá), P.costaricensisnew species (Costa Rica), P.laselvaensisnew species (Costa Rica), P.auritibiaenew species (Costa Rica), P.brunneanew species (Costa Rica, Panamá), P.muscamimeticanewspecies (Panamá), P.chiriquiensisnew species (Panamá), P.guyanensisnew species (French Guiana), P.ferrugineanew species (Ecuador), P.howdeninew species (Ecuador), and P.kuschelinewspecies (Colombia, Ecuador). A key is provided to separate the species, and an unusual type of “multifurcate” scale is reported for some species. Two species have been associated with plants of the family Araceae. Most collections of this genus by the Arthropods of La Selva (ALAS) biodiversity project in Costa Rica were made by passive trapping methods during the dry season and at lower to middle elevations along an altitudinal transect on the slopes of Volcan Barva. The coloration of some species in the genus is hypothesized to mimic social Hymenoptera or flies.


Exchange ◽  
2005 ◽  
Vol 34 (4) ◽  
pp. 349-375 ◽  
Author(s):  
Lovemore Togarasei

AbstractThe past twenty to thirty years in the history of Zimbabwean Christianity have witnessed the emergence of a new breed of Pentecostalism that tends to attract the middle and upper classes urban residents. This paper presentsfindings from a case study of one such movement, the Family of God church. It describes and analyses the origins, growth and development of this church as an urban modern Pentecostal movement. Thefirst section of the paper discusses the origins and development of the church focusing on the life of the founder. The second section focuses on the teaching and practices of the church. The church's doctrines and practices are here analysed tofind out the extent to which these have been influenced by the socio-political and economic challenges in the urban areas. The paper concludes that the modern Pentecostal movement is meant to address urban needs.


Author(s):  
Michael E. O’Sullivan

Abstract Pius XII’s Addresses to the Catholic Union of Midwives on October 29, 1951 and the National Congress of the Family Front and the Association of Large Families on November 27, 1951 were a pivotal moment in the history of sexuality in the Catholic Church because the pope permitted the use of the rhythm method for the purposes of family planning. They occurred at a moment of transition between Pius XI’s condemnation of contraception and abortion in 1930 and Paul VI’s denunciation of the birth control pill in 1968. This essay argues that these two speeches require greater scholarly attention and that West Germany represents a compelling case study for their reception. Other scholars document well the importance of Germany to the life and papacy of Pius XII, but little light has been shed on how Central European Catholics responded to his views about sex. In a fresh reading of the papal intervention, this essay suggests that the speeches only endorsed practices that had been common since the 1930s. In the midst of changing norms about sex and increased access to birth control as well as anxiety about rapid social change, Pius XII’s attempt at conciliation was significant but ultimately failed.


2019 ◽  
Vol 1 (1) ◽  
pp. 004-009
Author(s):  
Jean Béguinot

In leaf-mining insects, the oviposition behaviour is especially critical for the welfare of the future brood, the latter being usually doomed to develop entirely within the host-leaf selected for egg-laying by the ovipositing females. As, moreover, oviposition behaviour in leaf miners depends upon the taxonomic identities of both the mining-insect and the host, one can thus speculate that the patterns of oviposition behaviour of different leaf-mining species could be more or less congruent with either the degree of phylogenetic relatedness of the leaf-mining species themselves or the degree of phylogenetic relatedness of their respective host-species. Here, I test successively these two hypotheses – the “miners phylogenetic relatedness” hypothesis and the “hosts phylogenetic relatedness” hypothesis – by addressing a system insect-plant involving four mining moth species (all four belonging to the genus Phyllonorycter) and the three corresponding host-tree species, all included within the family Betulaceae. It turns out that, for this system at least, neither of the two previous hypotheses is actually supported. Possible reasons for this double rejection are discussed accordingly.


2021 ◽  
Author(s):  
Jennifer DiCocco

Vernacular photography has been a popular topic of research within the platforms of the history of photography and sociological studies and, in its print form, has increasingly seen its value rise in the marketplace. However, the family slideshow has been largely excluded from these various sites of attention. This thesis explores the family slideshow as a cultural product of mid-twentieth-century America. The slideshow is analysed in terms of how it was presented to and consumed by families in the 1950s and 1960s. The main section of this thesis provides an analysis of a case study carried out regarding the slideshow. The case study collected oral histories from four individuals on their experiences with producing and viewing slideshows in the mid-twentieth century. The analysis provides qualitative research on the consumption, production and viewing of the slideshow as a popular medium for family snapshots.


Parasitology ◽  
1933 ◽  
Vol 25 (3) ◽  
pp. 285-295 ◽  
Author(s):  
D. Keilin ◽  
V. C. Robinson

1. An account is given of Aproctonema entomophagum Keilin 1917, a Nematode parasite of the larvae of a Mycetophilid fly, Sciara pullula Winn., inhabiting decaying wood.2. The life history of this parasite is remarkable in the following respects:(a) The free-living stage is very short.(b) Both sexes are parasitic.(c) The usual host is the larva of the fly, from which the parasite escapes by actively breaking through the skin; but some parasites may be carried through to the imagines, from which they escape largely by the aid of the egg-laying movements provoked by them in the flies.3. Metamorphosis of the Sciara larva is delayed by the parasitism, so that at least two generations of Nematodes may be found in one host.4. All the parasitised imagines so far examined have been females.5. The systematic position of Aproctonema is discussed, the conclusion being that this worm and its near relative, Tetradonema plicans Cobb 1919, represent two closely allied genera of the family Mermithidae, but are not synonymous with Mermis. It is proposed to dispense with the family Tetra-donematidae Cobb.


Author(s):  
Simon Morgan Wortham

This chapter examines phobia as a question of psychoanalysis itself, a means to assess its complex and problematic conditions of possibility. In 1929, Alfred Adler produced a case study of ‘Miss R.’ in which he analysed her lupus phobia. Lupus is an auto-immune disease that reached its heights during the nineteenth century. Found at the crossroads between the sprawl of the city and the birth of the clinic, lupus’s historic arc reflects the early history of psychoanalysis. Adler associates Miss R.’s phobias with a desire to avoid her own inferiorization within the family and a fear about life on the outside. The case study offers a clue to the relationship between analyst and analysand: Adler interprets the young girl’s behaviour in terms of an egotistic desire to hold centre-stage; yet the case history is constructed out of extemporized remarks made before a captive audience, presumably to show off Adler’s analytic brilliance (in contrast to Freud’s, whom he takes every opportunity to disparage). We wonder whether Adler might be talking about himself as much as Miss R., and the case study begins to offer some insights not only into the split with Freud in 1911 but indeed the resistances of psychoanalysis itself.


1993 ◽  
Vol 17 (3) ◽  
pp. 325-353 ◽  
Author(s):  
Daniel Scott Smith

The history of the family lacks a history. Sociologists and historians rarely cite interpretative literature written before the last third of the twentieth century. Curiously, at least for the discipline of history, recent scholars have seemingly regarded older perceptions as relics of a prescientific past.This foray into intellectual history will demonstrate that ignoring the history of this field also distorts it. My case study considers what is widely regarded as the largest revision in thinking about the history of the family—the complete overthrow of what William J. Goode, the sociologist most credited with its rejection, has derisively called (1970: 6) “the classical family of Western nostalgia.” Kertzer and Hogan (1988: 84) have aptly summarized the chief elements of the interpretation overturned by the revisionists: “Until recently, the popular image of Western family history pictured people as living in large extended family units that had multiple functions. With the advent of industrialization, it was thought, this system was transformed into one characterized by small, nuclear family units having more specialized functions.”


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