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Tong Lei Yu, Yao Hui Deng, Juan Zhang and Li Peng Duan

Introduction Body size affects copulatory success and duration of insemination, and there is growing evidence that body size affects reproductive strategies in several marine gastropods (Crozier, 1918 ; Edwards, 1968 ; Staub & Ribi, 1995 ; Angeloni & Bradbury, 1999 ; Johnson, 1999 ; Pal et

János Török, Gábor Herczeg and Zoltán Korsós

budget of behavioural thermoregulation in ectotherms. In small reptiles, heating rate depends mainly on their physical characteristics. We analysed the effect of body size, and the possible joint effects originating from shape and colour differences on heating rate in three small-bodied (0.15-20 g

William E. Cooper and Louis J. Guillette

of Florida, Gainesville, Florida 32611, U.S.A. Abstract. We observed the distance moved, number of movements, and frequency of displays in ten minute intervals for two male color morphs, coral and yellow, and for brightly colored females, of Holbrookia propin- qua. We also measured body sizes and

Helga Wiederhecker, Adriana Pinto and Guarino Colli

Amphibia-Reptilia 26 (2005): 127-137 Sexual dimorphism in the Neotropical lizard, Tropidurus torquatus (Squamata, Tropiduridae) Adriana C.S. Pinto, Helga C. Wiederhecker, Guarino R. Colli Abstract. We describe the sexual dimorphism in coloration, body shape, and body size in Tropidurus

Shinnosuke Nakayama, Alfredo Ojanguren and Lee Fuiman

aggressive and grouping behaviours in red drum ( Sciaenops ocellatus ) larvae. Body size was used as a proxy for developmental state and body condition (i.e., residual of wet weight from the relationship between body size and wet weight) as a measure of physiological condition. Social

Di Lu, Cai Quan Zhou, Lian Jun Zhao and Wen Bo Liao

Introduction Differences between males and females in body size are often the most conspicuous distinguishing feature of the sexes. The phenomenon, known as sexual size dimorphism (SSD), is a prevailing characteristic in a wide range of animal taxa (Andersson, 1994 ; Fairbairn, 1997

Ivan Sazima, Otavio Marques and Alessandra Bizerra

Amphibia-Reptilia 26 (2005): 33-38 Reproduction and feeding of the colubrid snake Tomodon dorsatus from south-eastern Brazil Alessandra Bizerra 1,2 , Otavio A.V. Marques 2,4 , Ivan Sazima 3 Abstract. Body size, sexual dimorphism, reproductive cycles, fecundity, diet and feeding behaviour of the

Marco A.L. Zuffi and Elena Foschi

Introduction Organismal fitness may be implied through their phenotypes, including survivorship and reproductive output or success. In many oviparous reptiles, reproductive output (e.g., clutch size, clutch frequency, hatchling survivorship) is affected by female body size, where large females

Lígia Pizzatto and Otavio Marques

attained larger body sizes than males in all regions. Males and females from northern Atlantic forest were smaller and attained maturity with a smaller body size than males of other regions. The sexual size dimorphism index ranged from 0.19 to 0.23 and was lowest in the northern Atlantic forest. There was


Congdon J.D. Vitt L.J. Hadley N.F. Parental investment: comparative reproductive energetics in bisexual and unisexual lizards, genus Cnemidophorus Am. Nat 1978 112 509 520 Ferguson G.W. Snell H.L. Landwer A.J. Proximate control of variation of clutch, egg and body size in a west-Texas population of