The Lens as an Indicator of Age in Cottontail Rabbits

Lord, Rexford D.

doi:10.2307/3796900

Cited by 156 publications

(104 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Ani mals were killed by cervical dislocation according to Mills et al (1995). The weight of the desiccated eye lens (ELW) gives the best indication of age for small mammals (Lord, 1959;Martinet. 1966, rev.…”

Section: Trapping and Samplingmentioning

confidence: 99%

Frenkeliaparasites in a small mammal community. Dynamics of infection and effect on the host

Fichet‐Calvet¹,

Kia²,

Giraudoux³

et al. 2004

Parasite

View full text Add to dashboard Cite

Summary:A community of small mammals, were not infected. The maintenance of each parasite in a rural landscape is assured both by a forest and a grassland host. Multiple logistic regression showed that prevalence was highly agedependent, with an apparent seasonal pattern. Prevalence varied between 30 % in summer and 60 % in early spring for F. glareoli in C. glareolus and between 3 % in autumn to 30 % in early spring for F. microti in M. arvalis. The year, habitat, host sex, relative density had no impact on prevalence. In M arvalis only, sexually active voles were preferentially uninfected, indicating a possible impact of this parasitism on fertility.KEY WORDS : voles, population dynamics, Frenkelia spp., Coccidia, prevalence, age effect, agroecosystem, mid-mountain. MOTS CLÉS

show abstract

Section: Trapping and Samplingmentioning

confidence: 99%

Frenkeliaparasites in a small mammal community. Dynamics of infection and effect on the host

Fichet‐Calvet¹,

Kia²,

Giraudoux³

et al. 2004

Parasite

View full text Add to dashboard Cite

show abstract

“…Since the initial use of the eye lens technique to estim ate age of Sylvilagus floridanus (Lord, 1959), the method has been evaluated for a variety of mammalian speciels (Friend, 1968). Here we report its feasibility to estim ate the age of sika deer (Cervus nippon).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the eye lens method for age determination in sika deer

Feldhamer¹,

Chapman²

1980

Acta Theriol.

View full text Add to dashboard Cite

“…Our experiments show that in addition to the method and time of fixing, the main critical moment in preparation of lenses for weighing is drying them. Lord (1959) applied drying at a temperature of 80°C with air flow for 24-36 hours, which he considered sufficient. Many authors modify drying depending on the apparatus available, continuing drying only until the time that weight loss ceases.…”

Section: Technique For Drying Lensesmentioning

confidence: 99%

“…As increase in lens mass in young individuals is closely related to age (cf. curve of lens weight: Lord, 1959;Rongstad, 1966) the increasing classes of lens weight represent successive age groups. The materials presented prove that there is considerable age variation in the ossification process.…”

Section: Epiphyseal Protrusionmentioning

confidence: 99%

“…Attention has, however, been drawn to certain of its defects when applied to population studies (B u j a 1 s k a et al 1965; Walhovd, 1966). Lord (1959) used the weight of the dry crystalline lenses to define the age of Sylvilagus floridanus, and this method is now successfully used for many species of vertebrates (Friend, 1968). The ranges of lens weight in the hare (Lepus europaeus Pallas, 1778) of a known absolute age are not as yet known.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Studies on the European hare. XXVII. Methods for determination of Age in the European hare

Caboń-Raczyńska¹,

Raczyński²

1972

Acta Theriol.

View full text Add to dashboard Cite

It was found in relation to a series of 2277 hares killed in one shooting area in four shooting seasons (1966/67 -1969/70) that compared with estimating age on the basis of lens weight, Stroh's character underestimates the percentage of young hares by about 10°/o at the beginning of November and by 40°/o in January; on an average for the shooting season by 30%. This disqualifies Stroh's method for studies on the age structure of a population during the shooting season. The epiphyseal cartilage of the ulnar bone begins to disappear when lens weight is from 155-200 mg (in 2-10% of the individuals) and is absent in 98% of hares in the 275 mg class. The dry mass of lens gives the most accurate picture of the age structure of a population, on condition that the recommended method of fixing is used, that lenses are dried at 100°C and extreme values are established each time from the frequency distribution. INTRODUCTIONThe development in recent years of ecological studies on the European hare has stimulated efforts to find increasingly accurate methods of defining the age of individuals and in consequence the age structure of populations. From the point of view of game management the possibility of distinguishing »current year's« hares from »older« hares, and by this means determining the extent of annual growth of young hares, is of prime importance. Such estimates are most often made on material collected during the shooting season, when it is impossible to distinguish all young hares on the basis of their body dimensions and weight. Among various ways of distinguishing young hares the one which has achieved the greatest popularity in Europe is the method described by S t r o h (1931), consisting in establishing the presence or otherwise of the [75]

show abstract

The Lens as an Indicator of Age in Cottontail Rabbits

Cited by 156 publications

References 0 publications

Frenkeliaparasites in a small mammal community. Dynamics of infection and effect on the host

Frenkeliaparasites in a small mammal community. Dynamics of infection and effect on the host

Evaluation of the eye lens method for age determination in sika deer

Studies on the European hare. XXVII. Methods for determination of Age in the European hare

Contact Info

Product

Resources

About