Argulus canadensis from Cape Breton Island

1936 ◽  
Vol 2 (4) ◽  
pp. 355-358 ◽  
Author(s):  
Dr. C. B. Wilson
Keyword(s):  
Adult Males ◽  
Cape Breton Island ◽  
Young Males ◽  
Cape Breton ◽  
Males And Females ◽  
First Time ◽  
Secondary Sexual

Adult males, as well as young males and females, are described for the first time. The male has the most complicated secondary sexual apparatus so far described for species of Argulus. The immature differ markedly from the adults.

Sex- and age-specific reproductive and physical parameters of the bobcat (Lynx rufus) on Cape Breton Island, Nova Scotia

1983 ◽  
Vol 61 (8) ◽  
pp. 1771-1782 ◽  
Author(s):  
G. R. Parker ◽  
G. E. J. Smith
Keyword(s):  
Survival Rates ◽  
Lynx Rufus ◽  
Physical Parameters ◽  
Adult Males ◽  
Cape Breton Island ◽  
Winter Diet ◽  
Cape Breton ◽  
Males And Females ◽  
Adult Classes ◽  
Important Food Item

A total of 605 bobcat (Lynx rufus) carcasses, collected by trappers on Cape Breton Island from 1977–1978 through 1979–1980, were examined for sex and age structure, physical characteristics and condition, diet, and reproduction. The overall sex ratio was 52 males to 48 females; sex ratios favoured males in the juvenile cohorts and females in adult classes. Annual survival rates for adult males and females were 0.58 and 0.63, respectively. Kits were underrepresented and yearlings overrepresented in the annual harvests. The oldest bobcats were aged at 11.5 years. Females produced their first litters at 1 or 2 years of age. Breeding rates for 1-, 2-, and 3-year-old bobcats were 26, 55, and 73%, respectively. For those three age-classes, in utero litter sizes were 2.22, 2.43, and 2.74, respectively. Litter sizes ranged from 1 to 6. Snowshoehare (Lepus amer ic anus) was the most important food item in the winter diet; annual percent occurrence values ranged from 83 to 92%. The proportion of yearlings in the monthly samples declined through the winter while the proportion of kits increased. Options for regulating the composition of the harvest through flexible seasons are discussed.

Dispersal patterns in a regional koala population in south-east Queensland

2003 ◽  
Vol 30 (3) ◽  
pp. 281 ◽  
Author(s):  
David S. Dique ◽  
Jim Thompson ◽  
Harriet J. Preece ◽  
Deidré L. de Villiers ◽  
Frank N. Carrick
Keyword(s):  
Urban Areas ◽  
Home Ranges ◽  
Adult Males ◽  
Dispersal Patterns ◽  
Young Males ◽  
Straight Line ◽  
The Social ◽  
Straight Line Distance ◽  
Males And Females ◽  
Natal Home

Koala dispersal was investigated as part of a detailed ecological study of a nationally significant koala population located 20 km south-east of Brisbane, Queensland. From 1996 to 2000, 195 koalas from three sites were captured and fitted with radio-collars. A total of 40 koalas (23 males and 17 females) dispersed from these sites. Most (93%) dispersing individuals were 20–36 months of age. Three adult females (more than 36 months old) dispersed and no adult males dispersed during the study. A significantly higher proportion of young males dispersed than females. Dispersal occurred between June and December, with most dispersal of males commencing in July and August and that of females commencing between September and November prior to, and early in, the annual breeding season. The mean straight-line distance between the natal and breeding home ranges for males and females was similar and was measured at 3.5 km (range 1.1–9.7 km) and 3.4 km (range 0.3–10.6 km) respectively. Dispersing males and females tended to successfully disperse south and west of their natal home ranges and were generally unable to successfully disperse to urban areas within the study area, as a high proportion of the mortality of dispersing koalas was associated with attacks by domestic dogs and with collisions with vehicles on roads. Information from other studies indicates that most young koalas disperse from their natal areas. It is likely that the social behaviour and mating systems of koala populations provide mechanisms for young koalas to disperse. The potential role of dispersal in the dynamics of regional koala populations is discussed.

scholarly journals The development of affiliative and coercive reproductive tactics in male chimpanzees

2021 ◽  
Vol 288 (1942) ◽  
pp. 20202679
Author(s):  
Rachna B. Reddy ◽  
Kevin E. Langergraber ◽  
Aaron A. Sandel ◽  
Linda Vigilant ◽  
John C. Mitani
Keyword(s):  
Mating Success ◽  
Sexual Coercion ◽  
Adolescent And Young Adult ◽  
Adolescent Male ◽  
Male Mating ◽  
Adult Males ◽  
Reproductive Tactics ◽  
Males And Females ◽  
First Time ◽  
Older Males

Like many animals, adult male chimpanzees often compete for a limited number of mates. They fight other males as they strive for status that confers reproductive benefits and use aggression to coerce females to mate with them. Nevertheless, small-bodied, socially immature adolescent male chimpanzees, who cannot compete with older males for status nor intimidate females, father offspring. We investigated how they do so through a study of adolescent and young adult males at Ngogo in Kibale National Park, Uganda. Adolescent males mated with nulliparous females and reproduced primarily with these first-time mothers, who are not preferred as mating partners by older males. Two other factors, affiliation and aggression, also influenced mating success. Specifically, the strength of affiliative bonds that males formed with females and the amount of aggression males directed toward females predicted male mating success. The effect of male aggression toward females on mating success increased as males aged, especially when they directed it toward females with whom they shared affiliative bonds. These results mirror sexual coercion in humans, which occurs most often between males and females involved in close, affiliative relationships.

Factors Affecting the Distribution of Mallards Wintering in the Mississippi Alluvial Valley

The Auk ◽  
1983 ◽  
Vol 100 (4) ◽  
pp. 932-946 ◽  
Author(s):  
James D. Nichols ◽  
Kenneth J. Reinecke ◽  
James E. Hines
Keyword(s):  
Population Size ◽  
Mississippi Alluvial Valley ◽  
Adult Males ◽  
Alluvial Valley ◽  
Factors Affecting ◽  
Young Males ◽  
Young Females ◽  
Winter Distribution ◽  
Wintering Areas ◽  
Males And Females

Abstract The Mississippi Alluvial Valley (MAV) is the principal wintering area for Mallards (Anas platyrhynchos) in the Mississippi Flyway. Here, we consider it a distinct habitat (sensu Fretwell 1972), i.e. fitness is relatively homogeneous among ducks within the MAV but different from that of ducks in other such habitats. We analyzed recovery distributions of Mallards banded preseason (July-September 1950-1980) to test hypotheses concerning the effects of winter temperatures, precipitation, and population levels on Mallard winter distribution. When two groups of years that comprised extremes of warm and cold winter weather were compared, recovery distributions of all four age and sex classes (adult males and females, young males and females) differed significantly; recoveries were located farther south in cold years. Recovery distributions also differed between wet and dry years in the MAV for all groups except adult males, higher proportions of recoveries of adult females and of young males and females occurring in the MAV during wet winters. Although differences in continental Mallard population size were associated with differences in recovery distributions only of adult males and young females, the proportion of young males and of all young Mallards recovered in the MAV increased during years of low populations. We conclude that temperature, water conditions, and population size affect the habitat suitability of Mallard wintering areas and that Mallards exhibit considerable flexibility in winter distribution associated with these factors.

The weevils (Coleoptera: Curculionoidea) of the Maritime Provinces of Canada, II: New records from Nova Scotia and Prince Edward Island and regional zoogeography

2007 ◽  
Vol 139 (3) ◽  
pp. 397-442 ◽  
Author(s):  
Christopher G. Majka ◽  
Robert S. Anderson ◽  
David B. McCorquodale
Keyword(s):  
Nova Scotia ◽  
Introduced Species ◽  
Prince Edward Island ◽  
Distribution Patterns ◽  
Maritime Provinces ◽  
Cape Breton Island ◽  
Biogeographic Patterns ◽  
Cape Breton ◽  
Faunal List ◽  
First Time

AbstractSeventy-nine species of weevils are newly reported in Nova Scotia and 66 species are newly reported on Prince Edward Island, increasing the known provincial weevil faunas to 244 and 92 species, respectively. Thirty-six species are recorded for the first time in the Maritime Provinces; of these, Ceutorhynchus pallidactylus (Marsham), Listronotus dietzi O'Brien, Corthylus columbianus Hopkins, and Orchidophilus aterrimus (Waterhouse) are recorded for the first time in Canada. Orchidophilus aterrimus has been collected only in exotic domesticated orchids and is not established in the wild. Fourteen species previously recorded on Cape Breton Island, Nova Scotia, are reported from the provincial mainland. Four species — Curculio sulcatulus (Casey), Ceutorhynchus squamatus LeConte, Tachyerges niger (Horn), and Ips calligraphus (Germar) — are removed from the faunal list of Nova Scotia, and three species — Temnocerus cyanellus (LeConte), Curculio nasicus (Say), and Cryphalus ruficollis ruficollis Hopkins — are removed from the faunal list of Prince Edward Island. The combined known weevil fauna of the Maritime Provinces now totals 290 species. The adequacy of collection effort is discussed and in Nova Scotia, where collection effort has been greatest, distribution patterns of selected groups of species are examined. Island faunas are discussed with respect to those of Prince Edward Island and Cape Breton Island. Regional biogeographic patterns of species are also discussed, including possible disjunct populations in Nova Scotia and species that may not have crossed the isthmus of Chignecto to colonize Nova Scotia. Attention is drawn to the long history of introduced species in the region and to ongoing introductions through an examination of the earliest records for the 60 introduced species found in the region.

scholarly journals A new species of Macrostemum Kolenati, 1859 from Brazilian Amazon and the immature stages of M. brasiliense (Fischer, 1970) (Trichoptera: Hydropsychidae)

2019 ◽  
Author(s):  
Ana Maria Pes ◽  
Gleison Robson Desidério ◽  
Patrik Barcelos-Silva ◽  
Neusa Hamada
Keyword(s):  
New Species ◽  
Brazilian Amazon ◽  
Immature Stages ◽  
Adult Males ◽  
Forest Fragment ◽  
Paulo State ◽  
Minas Gerais State ◽  
Males And Females ◽  
First Time ◽  
A New Species

Macrostemum is the second largest genus of Macronematinae with about 104 described species distributed in the Neotropical (18), Afrotropical (20), Australasian (7), Palearctic (2), Nearctic (3) and Oriental (54) regions. Despite its great diversity, knowledge about its immature stages is scarce: worldwide, only 7 species (6.7%) have larvae and/or pupae described. From the Neotropics, only one species, Macrostemum ulmeri (Banks, 1913), has described larvae and pupae. The objectives of this study are to describe and illustrate a new species, Macrostemum araca sp. nov., based on adult males and females from Serra do Aracá, Amazonas, Brazil, and the larvae and pupae of M. brasiliense (Fischer, 1970) from an Atlantic Forest fragment in São Paulo state using the metamorphotype method. In addition, this species is recorded for the first time for Minas Gerais state.

scholarly journals Description of life stages of dung beetle Scaptodera rhadamistus (Fabricius, 1775) (Coleoptera: Scarabaeidae: Scarabaeinae) with notes on nesting and biology

2018 ◽  
Vol 10 (15) ◽  
pp. 12990-12994
Author(s):  
Suvarna S. Khadakkar ◽  
Ashish D. Tiple ◽  
Arun M. Khurad
Keyword(s):  
Dung Beetle ◽  
Female Genitalia ◽  
Immature Stages ◽  
Life Stages ◽  
Adult Males ◽  
Male And Female ◽  
Males And Females ◽  
First Time ◽  
Support Projection

Immature stages of Scaptodera rhadamistus (Fabricius) are described for the first time along with notes on nidification and biology.  The larvae differ from other Scarabaeinae species in the structure of raster on tenth sternum with two irregular bunches of serrations ventrally one on either half.  Pupae with pronotum transverse having rounded margins resemble adults, and consist of four lateral, single caudal and single pteronotal support projection.  Adult males and females differ in coloration, structure of pronotum, presence of spine like process on mesosternum and, in the structure of male and female genitalia.

scholarly journals Age of First Pornography Consumption and Genital Satisfaction Among Irish Students

2016 ◽  
Vol 9 (1) ◽  
pp. 108-108
Author(s):  
K. Dawson ◽  
◽  
S. Nic Gabhainn ◽  
Keyword(s):  
Adult Males ◽  
Cross Sectional Survey ◽  
Online Questionnaire ◽  
Cross Sectional ◽  
Young Males ◽  
Self Image ◽  
Pornography Consumption ◽  
Appearance Satisfaction ◽  
First Time ◽  
The Relationship

Objective: To examine the relationship between early exposure to pornography and genital-related satisfaction among young Irish adults. Design and Method: This study employed cross-sectional survey data from 2,162 University students, of whom 53% were male. Data were collected via an anonymous online questionnaire, which included items on pornography consumption and the Genital Self-Image Scales for females and males. Results: Pornography consumption was reported by 99.7% of males and 89.6% of females. The majority (51.3%) of the male respondents reported being exposed to pornography for the first time between the age of 10 and 13, while the majority of females (54.1%) report first exposure between 14 and 17. For males, exposure to pornography between the ages of 10 and 13 was significantly associated with lower levels of genital esteem, reduced genital appearance satisfaction and greater genital embarrassment, as compared to those first exposed at older ages. In contrast, males who reported first time exposure to pornography over the age of 18 were significantly more likely to report high levels of genital esteem. Among females age of first exposure to pornography was not significantly associated with any of the genital esteem, appearance or embarrassment measures. Conclusions: The results indicate that first exposure to pornography under the age of thirteen is associated with negative genital self-image, for young adult males. The importance of pornography literacy education for young males is thus highlighted.

Review of the Sarcophaginae (Diptera: Sarcophagidae) of Buenos Aires Province (Argentina), with a key and description of a new species

Zootaxa ◽  
2010 ◽  
Vol 2575 (1) ◽  
pp. 1 ◽  
Author(s):  
PABLO RICARDO MULIERI ◽  
JUAN CARLOS MARILUIS ◽  
LUCIANO DAMIÁN PATITUCCI
Keyword(s):  
Life History ◽  
New Species ◽  
Buenos Aires ◽  
Junior Synonym ◽  
Buenos Aires Province ◽  
Adult Males ◽  
Males And Females ◽  
First Time ◽  
A New Species

Thirty-nine species of Sarcophaginae are recorded from Buenos Aires Province (Argentina). A new species, Microcerella asymmetrica sp. nov., is described. Females of Oxysarcodexia bicolor Lopes, O. marina Hall, and Sarcophaga (Lipoptilocnema) koehleri Blanchard are described for the first time. Four nomenclatorial actions are reported: Sarcohelicobia elegans Blanchard is established as a new junior synonym of Nephochaetopteryx cyaneiventris Lopes, and lectotypes are designated for Oxysarcodexia delpontei Blanchard [a junior synonym of Oxysarcodexia paulistanensis (Mattos)], Sarcophaga argentina Brèthes [a junior synonym of Sarcophaga (Liopygia) argyrostoma (Robineau-Desvoidy)], and Neobellieria brethesi Blanchard [a junior synonym of Sarcophaga (Neobellieria) polistensis Hall]. Blaesoxipha (Tephromyia) hospes (Aldrich), Peckia (Euboettcheria) florencioi (Prado & Fonseca), Ravinia advena (Walker), R. aureopyga (Hall) and Sarcodexia lambens (Wiedemann) are newly recorded from Buenos Aires Province, and Udamopyga percita is newly recorded from Argentina. A key is presented to the adult males and females of 36 of the 39 species of Sarcophaginae recorded from Buenos Aires province. Notes on distribution, biology, life history and host records are also given.

Phillipsite altered to analcime in basal Windsor [shallow-water marine] carbonates of Mississippian age in Nova Scotia

1980 ◽  
Vol 17 (8) ◽  
pp. 1096-1100
Author(s):  
Peter H. von Bitter ◽  
Hilary A. Plint-Geberl
Keyword(s):  
Nova Scotia ◽  
Shallow Water ◽  
Cape Breton Island ◽  
Cape Breton ◽  
Marine Carbonates ◽  
First Time

Phillipsite crystals altered to analcime are reported for the first time in ancient shallow-water marine carbonates (Lower Windsor Group, Cape Breton Island, Nova Scotia, Canada).

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