Correction: Territory Size, Mating Status, and Individual Survival of Males in a Fluctuating Population of Willow Ptarmigan

1985 ◽  
Vol 16 (1) ◽  
pp. 79
Keyword(s):  
Territory Size ◽  
Mating Status ◽  
Willow Ptarmigan ◽  
Individual Survival

Song Rates, Mating Status, and Territory Size of Cerulean Warblers in Missouri Ozark Riparian Forest

2009 ◽  
Vol 121 (2) ◽  
pp. 283-289 ◽  
Author(s):  
Mark B. Robbins ◽  
Árpád S. Nyári ◽  
Monica Papeş ◽  
Brett W. Benz
Keyword(s):  
Riparian Forest ◽  
Territory Size ◽  
Mating Status ◽  
Cerulean Warblers

Factors Influencing Age-Related Reproductive Success in the Willow Ptarmigan

The Auk ◽  
1984 ◽  
Vol 101 (4) ◽  
pp. 848-854 ◽  
Author(s):  
Susan J. Hannon ◽  
James N. M. Smith
Keyword(s):  
Reproductive Success ◽  
Clutch Size ◽  
Hatching Success ◽  
Territory Size ◽  
Willow Ptarmigan ◽  
Factors Influencing ◽  
Age Related ◽  
Population Turnover ◽  
Clutch Initiation ◽  
Foraging Skills

Abstract In many species, adult birds lay earlier and have higher reproductive success than do yearlings. We found no difference, however, between adult and yearling female Willow Ptarmigan (Lagopus lagopus alexandrae) in date of clutch initiation, clutch size, hatching success, number of fledged young, or territory size. Adult females defended their broods more vigorously, and more were observed with broods, a situation suggesting that more yearlings lost their eggs or young and did not renest. Pairs composed of two adults produced more fledged young than did pairs composed of two yearlings, but clutch size and date of clutch initiation were similar in the two groups. We suggest that the following factors may allow yearlings to reproduce almost as successfully as adults: (1) a reduction in competition with adults for territories because of high population turnover, (2) the presence of extensive male parental care and precocial young, and (3) a dependence on a food source that is readily available and can be obtained without specialized foraging skills.

The savannah sparrow territorial system: can habitat features be related to breeding success?

1984 ◽  
Vol 62 (9) ◽  
pp. 1819-1828 ◽  
Author(s):  
Jean Bédard ◽  
Gisèle LaPointe
Keyword(s):  
Breeding Success ◽  
Plant Cover ◽  
Territory Size ◽  
Breeding Performance ◽  
Mating Status ◽  
Passerculus Sandwichensis ◽  
Habitat Features ◽  
Savannah Sparrow ◽  
Territory Holder ◽  
Selection Of

We studied the biology of the savannah sparrow (Passerculus sandwichensis) in a tidal marsh – abandoned fields ecotone at Isle Verte, Québec, from 1976 to 1981 in an attempt to relate habitat features of the territories (size, vegetation structure and height, food abundance, and an index of foraging opportunities) with breeding success (success in attracting a mate and in fledging at least one young). The height of plant cover did not influence the selection of nesting areas by females. The index of foraging opportunities was highly variable and could not be related to the age of the territory holder (yearling or older), his mating status (breeder or bachelor), or to his breeding success (success in fledging at least one young). Territory size was not consistently influenced by these factors. We propose several reasons for the lack of relation between breeding performance and those features of habitat quality that we studied.

Willow Ptarmigan (Lagopus lagopus)

1998 ◽  
Author(s):  
S. J. Hannon ◽  
P. K. Eason ◽  
K. Martin
Keyword(s):  
Willow Ptarmigan ◽  
Lagopus Lagopus

Territory Size, Energetics, and Breeding Strategy in the Corvidae

1986 ◽  
Vol 128 (5) ◽  
pp. 642-652 ◽  
Author(s):  
Christopher C. Shank
Keyword(s):  
Breeding Strategy ◽  
Territory Size

Female Choice in Middendorff's Grasshopper-Warbler (Locustella Ochotensis)

The Auk ◽  
1986 ◽  
Vol 103 (4) ◽  
pp. 694-700 ◽  
Author(s):  
Hisashi Nagata
Keyword(s):  
Mate Choice ◽  
Female Choice ◽  
Morphological Characteristics ◽  
Female Mate Choice ◽  
Food Abundance ◽  
Territory Size ◽  
Territory Quality ◽  
Female Mate ◽  
Nest Sites ◽  
Grasshopper Warbler

Abstract Morphological and territorial factors that influence female mate choice were examined in the monogamous Middendorff's Grasshopper-Warbler (Locustella ochotensis) on an islet near Fukuoka, Japan. I assumed that pairing date corresponded with female mate choice. Pairing date was correlated with both territory size and food abundance but was not correlated with selected morphological characteristics of males. Territorial quality was assumed to be correlated with territory size because preferable food resources and nest sites were distributed randomly. I conclude that female mate choice was influenced by territory quality rather than by the morphological characteristics of males.

scholarly journals Effect of Pheromone Blend Components, Sex Ratio, and Population Size on the Mating of Cadra cautella (Lepidoptera: Pyralidae)

2020 ◽  
Vol 20 (6) ◽  
Author(s):  
Abeysinghe Mudiyanselage Prabodha Sammani ◽  
Dissanayaka Mudiyanselage Saman Kumara Dissanayaka ◽  
Leanage Kanaka Wolly Wijayaratne ◽  
William Robert Morrison
Keyword(s):  
Sex Ratio ◽  
Population Size ◽  
Management Practices ◽  
Mating Disruption ◽  
Current Knowledge ◽  
Mating Status ◽  
Cadra Cautella ◽  
Synthetic Chemicals ◽  
Population Sizes ◽  
Lepidoptera Pyralidae

Abstract The almond moth Cadra cautella (Walker), a key pest of storage facilities, is difficult to manage using synthetic chemicals. Pheromone-based management methods remain a high priority due to advantages over conventional management practices, which typically use insecticides. Cadra cautella females release a blend of pheromone including (Z, E)-9,12-tetradecadienyl acetate (ZETA) and (Z)-9-tetradecadien-1-yl acetate (ZTA). The effect of these components on mating of C. cautella and how response varies with the population density and sex ratio remain unknown. In this study, the mating status of C. cautella was studied inside mating cages under different ratios of ZETA and ZTA diluted in hexane and at different population sizes either with equal or unequal sex ratio. The lowest percentage of mated females (highest mating disruption [MD] effects), corresponding to roughly 12.5%, was produced by a 5:1 and 3.3:1 ratio of ZETA:ZTA. Populations with equal sex ratio showed the lowest percentage of mated females, at 20% and 12.5% under lower and higher density, respectively. The next lowest percentage of mated females was produced when the sex ratio was set to 1: 2 and 2:1 male:female, with just 25% and 22.5% of moths mated, respectively. This study shows that mating status of C. cautella is influenced by ZETA:ZTA ratio, sex ratio, and population size. This current knowledge would have useful implications for mating disruption programs.

scholarly journals ‘We are taught to act’: hustling on the move in Kampala and Nairobi

Africa ◽  
2021 ◽  
Vol 91 (1) ◽  
pp. 95-112
Author(s):  
William Monteith ◽  
George Mirembe
Keyword(s):  
East Africa ◽  
Film Industry ◽  
Language Skills ◽  
Young Men ◽  
Economic Opportunities ◽  
African Cities ◽  
Individual Survival ◽  
Urban Contexts

AbstractThis article explores the question of what happens when highly socialized and contingent forms of provisioning go wrong, and young men are forced to start again in unfamiliar urban contexts. The decline of George Mirembe's moneylending business in Kampala pre-empted his departure from the country and his arrival in Nairobi in search of new socio-economic opportunities. Lacking the documents and language skills necessary to enter formal sectors of the economy, George claimed asylum as a sexual refugee while working as a smuggler and a voice actor in the shadow film industry. His activities illustrate the advantages and limitations of the hustle as a framework for understanding the activities of transnational ‘others’ in African cities. I argue that translational practices of acting and storytelling have become a generalized tactic of survival among migrants in urban East Africa. Such practices are illustrative of a form of ‘uprooted hustle’ – or hustling on the move – that is oriented towards individual survival and exit rather than place-based transformation.

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