2020
DOI: 10.1038/s41598-020-61168-y
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Relative tail length correlates with body condition in male but not in female crowned leafnose snakes (Lytorhynchus diadema)

Abstract: Reproductive success is the ultimate measure of individual quality; however, it is difficult to determine in free-living animals. therefore, indirect measures that are related to reproduction are generally employed. in snakes, males typically possess longer tails than females and this sexual size dimorphism in tail length (tL) has generally been attributed to the importance of the tail in mating and reproduction. Thus, intra-sexual differences in tail length, specifically within males, were hypothesized to ref… Show more

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Cited by 9 publications
(14 citation statements)
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“…Males in better condition can allocate more resources to sexually selected traits; which are costly and are tightly linked with body condition. For example, in the crowned leafnose snake, better body condition of males determines longer tails, which are important for mating 36 .…”
Section: Discussionmentioning
confidence: 99%
“…Males in better condition can allocate more resources to sexually selected traits; which are costly and are tightly linked with body condition. For example, in the crowned leafnose snake, better body condition of males determines longer tails, which are important for mating 36 .…”
Section: Discussionmentioning
confidence: 99%
“…through a phylogenetic approach, can clarify the morphological evolution of the group. The proportionally larger tails in males may be due to three classic and nonexcluding hypotheses: (i) to accommodate the hemipenis "The Morphological Constraint Hypothesis" (e.g., King 1989;Shine, et al 1998, Sivan et al 2020 females have relatively shorter tails as a secondary result of natural selection for increased reproductive capacity "The Female Reproductive Output Hypothesis" or (iii) an increased reproductive ability in males (sexual selection) "The Mating Ability Hypothesis" (King 1989;Shine et al 1999). However, we did not detect significant differences in the allometric coefficient between adults from both sexes for tail length, suggesting that males are born with a proportionally larger tail, or acquire this trait during the juvenile stage, thus both hypotheses should be tested in the future with neonates.…”
Section: Discussionmentioning
confidence: 99%
“…We chose this index instead of the ingestion ratio IR—prey width/snake head length ( Martins, Marques & Sazima, 2002 ) since several specimens had unreliable head length measurements because their heads were damaged. We calculated the relative body mass ( i.e ., the body condition index or BCI), relative tail length and relative neck diameter as the residuals from the linear regression of log-transformed values of these measurements on log-transformed SVL, which allowed us to detect differences in shape while controlling for SVL ( King, 1989 ; Sivan et al, 2020 ).…”
Section: Methodsmentioning
confidence: 99%