Age Determination of Frogs and Toads (Amphibia, Anura) from North‐western Europe

Gibbons, Maria M.; McCarthy, T. K.

doi:10.1111/j.1463-6409.1983.tb00559.x

Cited by 79 publications

(47 citation statements)

References 7 publications

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“…Appositional cycles reflect cycles of seasonal metabolic activity in temperate zone anurans. During hibernation, bone tissue apposition stops and a line of arrested growth (LAG) is formed; therefore, each LAG represents 1 year of an anuran's life, as was confirmed by mark-recapture studies (Hemelaar and van Gelder, 1980;Gibbons and McCarthy, 1983;Płytycz and Bigaj, 1993;Khonsue et al, 2001Khonsue et al, , 2002Measey, 2001). LAG formation can reflect not only seasonal, but also intrinsic biological rhythms, such as one might encounter in tropical species that are active year-round without hibernation (Guarino et al, 1998;Pancharatna, 2001, 2002).…”

mentioning

confidence: 89%

Development and growth of long bones in European water frogs (Amphibia: Anura: Ranidae), with remarks on age determination

Rozenblut

Ogielska

2005

Journal of Morphology

115

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Differentiation and development of long bones were studied in European water frogs: Rana lessonae, R. ridibunda, and R. esculenta. The study included premetamorphic larvae (Gosner Stage 40) to frogs that were 5 years old. Femora, metatarsal bones, and proximal phalanges of the hindlimb exhibit the same pattern of periosteal bone differentiation and the same pattern of growth. Longitudinal and radial growth of these bones was studied by examination of the diaphyses and epiphyses, particularly where the edge of periosteal bone is inserted into the epiphysis. The periosteum seems to be responsible for both longitudinal and radial growth. Investigation of the formation, length, and arrangement of lines of arrested growth reveals that the first line is present only in the middle 25-35% of the length of the diaphysis of an adult bone; therefore, only the central portion of the diaphysis should be used for age estimation in skeletochronological studies. Comparison of the shapes and histological structures of epiphyses in the femur, metatarsal bones, and phalanges revealed that epiphyseal cartilages are composed of an inner and outer part. The inner metaphyseal cartilage has distinct zones and plugs the end of the periosteal bone cylinder; its role in longitudinal growth is questioned. The outer epiphyseal cartilage is composed of articular cartilages proper, in addition to lateral articular cartilages. Differences in the symmetry of the lateral articular cartilages of distal epiphyses of the femur and toes may reflect adaptations to different kinds of movements at the knee and in the foot.

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mentioning

confidence: 89%

Development and growth of long bones in European water frogs (Amphibia: Anura: Ranidae), with remarks on age determination

Rozenblut

Ogielska

2005

Journal of Morphology

115

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“…Cet état de fait s'explique par l'absence de structures permettant une lecture facile de l'âge et par certaines difficultés de récolte des divers stades. Quelques études récentes s'intéressent à la détermination de l'âge chez la grenouille rousse R. temporaria (GIBBONS et Me CARTHY, 1983 ;GUYETANT et al, 1984 ;GUYETANT et al, 1988 ;RYSER, 1988) ou encore chez le crapaud commun Bufo bufo (HEMELAAR et VAN GELDER, 1980 ;GITTINS et al, 1982). Les données concernant le complexe esculenta sont limitées à celles de BORKIN et al, (1979), FRANCILLON et CASTANET (1985).…”

Section: Introductionunclassified

Structures démographiques de populations adultes de grenouilles vertes du complexe Esculenta

Neveu¹

1991

Bull. Fr. Pêche Piscic.

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Cette étude concerne 763 Rana lessonae et 306 Rana esculenta capturées au cours de 5 années dans différents sites des Pays de Vilaine, dans la partie ouest de la France. Les biotopes prospectés, étangs, mares, marais, présentent des structures spécifiques différentes. Les grenouilles ont été mesurées et sexées, leur âge a été déterminé à partir de coupes dans la diaphyse des tibias. Les échantillons sont proportionnels à la densité réelle des populations en place, contrairement à la majorité des études.Les histogrammes des fréquences des longueurs font apparaître deux groupes d'animaux : les subadultes et les adultes. Les premiers sont âgés de 1 an, les seconds de 2 et 3 ans, quelques individus dépassent 4 ans. Si la croissance est meilleure chez les mâles la première année, c'est l'inverse par la suite. La croissance de R. esculenta est supérieure à celle de R. lessonae, ce qui donne des tailles maximales plus fortes.La croissance de R. esculenta est variable suivant les sites. Elle est meilleure dans les zones agricoles où les eaux sont plus eutrophisées, mais les densités de populations sont aussi plus faibles. La croissance est variable suivant les années : jusqu'en 1982 les tailles moyennes sont supérieures à celles des années suivantes.Le sex ratio est généralement proche de 1, sauf pour les populations de R. esculenta triploïdes constituées en majorité de mâles.Le taux annuel de mortalité augmente avec l'âge, seulement 7 % des R. lessonae et 4 % des R. esculenta atteignent l'âge de 4 ans. DEMOGRAPHIC STRUCTURES OF GREEN FROGS ADULT POPULATIONS OF THE ESCULENTA COMPLEX SUMMARYA total of 763 pool frogs (Rana lessonae) and 306 edible frogs (Rana esculenta) were collected at different sites in the "Pays de Vilaine", in western part of France, during five years. Each type of biotops ponds, pools, marshes, has a particular species structure. All frogs were measured, sexed and aged by analysis of tibia diaphysis sections. Each sample was proportionnai to densities of standing populations contrary to other studies.Lengths frequencies distributions show two groups of frogs : subadults and adults. Subadults are one year old, adults mainly two or three years old, frogs more four years old are scarce. Growth in males is better than in females only during the first year. The growth rate and the maximal size in Rana esculenta is higher than in Rana lessonae.R. esculenta growth is related to sample site. Growth is faster in agricultural areas where waters are more eutrophicated and frogs populations densities smaller. Growth changes according to year and until 1982 mean lengths were greater than following years.

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“…During his 2-year investiga tions, the author reported the dominance of 3-to 5-year-old frogs and unstable compositions of each of these three classes. Gibbons and MacCarthy [28] estimated the age of sexual maturity of common frogs from Ireland also as 2 years, but the maximal age was estimated as 7 years. In eastern Europe these frogs attain sexual maturity after the 3rd wintering or lat er.…”

Section: Longevity and Age Structure Of Populationsmentioning

confidence: 99%

Age Determination and Longevity in Amphibians

Smirina¹

1994

Gerontology

173

135

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Age Determination of Frogs and Toads (Amphibia, Anura) from North‐western Europe

Cited by 79 publications

References 7 publications

Development and growth of long bones in European water frogs (Amphibia: Anura: Ranidae), with remarks on age determination

Development and growth of long bones in European water frogs (Amphibia: Anura: Ranidae), with remarks on age determination

Structures démographiques de populations adultes de grenouilles vertes du complexe Esculenta

Age Determination and Longevity in Amphibians

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