scholarly journals Calibration of life history traits with epiphyseal closure, dental eruption and bone histology in captive and wild red deer

2019 ◽  
Vol 235 (2) ◽  
pp. 205-216 ◽  
Author(s):  
Teresa Calderón ◽  
Daniel DeMiguel ◽  
Walter Arnold ◽  
Gabrielle Stalder ◽  
Meike Köhler
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Red Deer ◽  
Bone Histology ◽  
Dental Eruption ◽  
Epiphyseal Closure

Long-bone development and life-history traits of the Devonian tristichopterid Hyneria lindae

2018 ◽  
Vol 109 (1-2) ◽  
pp. 75-86 ◽  
Author(s):  
Viktoriia KAMSKA ◽  
Edward B. DAESCHLER ◽  
Jason P. DOWNS ◽  
Per E. AHLBERG ◽  
Paul TAFFOREAU ◽  
...  
Keyword(s):  
Life History ◽  
Limb Development ◽  
Life History Traits ◽  
Bone Development ◽  
Bone Histology ◽  
Long Bone ◽  
General Character ◽  
Appendicular Skeleton ◽  
Predatory Behaviour ◽  
Large Size

ABSTRACTHyneria lindae is one of the largest Devonian sarcopterygians. It was found in the Catskill Formation (late Famennian) of Pennsylvania, USA. The current study focuses on the palaeohistology of the humerus of this tristichopterid and supports a low ossification rate and a late ossification onset in the appendicular skeleton. In addition to anatomical features, the large size of the cell lacunae in the cortical bone of the humerus mid-shaft may suggest a large genome size and associated neotenic condition for this species, which could, in turn, be a partial explanation for the large size of H. lindae. The low metabolism of H. lindae revealed here by bone histology supports the hypothesis of an ambush predatory behaviour. Finally, the lines-of-arrested-growth pattern and late ossification of specimen ANSP 21483 suggest that H. lindae probably had a long juvenile stage before reaching sexual maturity. Although very few studies address the life-history traits of stem tetrapods, they all propose a slow limb development for the studied taxa despite different ecological conditions and presumably distinct behaviours. The bone histology of H. lindae would favour the hypothesis that a slow long-bone development could be a general character for stem tetrapods.

Sex- and age-dependent effects of population density on life history traits of red deer Cervus elaphus in a temperate forest

Ecography ◽  
2002 ◽  
Vol 25 (4) ◽  
pp. 446-458 ◽  
Author(s):  
Christophe Bonenfant ◽  
Jean-Michel Gaillard ◽  
François Klein ◽  
Anne Loison
Keyword(s):  
Life History ◽  
Population Density ◽  
Cervus Elaphus ◽  
Temperate Forest ◽  
Life History Traits ◽  
Red Deer ◽  
Age Dependent

Prey tell: what quillback rockfish early life history traits reveal about their survival in encounters with juvenile coho salmon

2020 ◽  
Vol 650 ◽  
pp. 7-18 ◽  
Author(s):  
HW Fennie ◽  
S Sponaugle ◽  
EA Daly ◽  
RD Brodeur
Keyword(s):  
Life History ◽  
Early Life ◽  
Life History Traits ◽  
Direct Evidence ◽  
Coho Salmon ◽  
Larval Fish ◽  
Early Life History ◽  
In The Wild ◽  
Otolith Microstructure Analysis ◽  
Pelagic Juvenile

Predation is a major source of mortality in the early life stages of fishes and a driving force in shaping fish populations. Theoretical, modeling, and laboratory studies have generated hypotheses that larval fish size, age, growth rate, and development rate affect their susceptibility to predation. Empirical data on predator selection in the wild are challenging to obtain, and most selective mortality studies must repeatedly sample populations of survivors to indirectly examine survivorship. While valuable on a population scale, these approaches can obscure selection by particular predators. In May 2018, along the coast of Washington, USA, we simultaneously collected juvenile quillback rockfish Sebastes maliger from both the environment and the stomachs of juvenile coho salmon Oncorhynchus kisutch. We used otolith microstructure analysis to examine whether juvenile coho salmon were age-, size-, and/or growth-selective predators of juvenile quillback rockfish. Our results indicate that juvenile rockfish consumed by salmon were significantly smaller, slower growing at capture, and younger than surviving (unconsumed) juvenile rockfish, providing direct evidence that juvenile coho salmon are selective predators on juvenile quillback rockfish. These differences in early life history traits between consumed and surviving rockfish are related to timing of parturition and the environmental conditions larval rockfish experienced, suggesting that maternal effects may substantially influence survival at this stage. Our results demonstrate that variability in timing of parturition and sea surface temperature leads to tradeoffs in early life history traits between growth in the larval stage and survival when encountering predators in the pelagic juvenile stage.

Life History Traits in a Population of Pelobates syriacus (Boettger, 1889) from Turkey

2020 ◽  
Vol 27 (4) ◽  
pp. 195-200
Author(s):  
Ufuk Bülbül ◽  
Halime Koç ◽  
Yasemin Odabaş ◽  
Ali İhsan Eroğlu ◽  
Muammer Kurnaz ◽  
...  
Keyword(s):  
Life History ◽  
Age Structure ◽  
Life History Traits ◽  
Spadefoot Toad ◽  
Males And Females

Age structure of the eastern spadefoot toad, Pelobates syriacus from the Kızılırmak Delta (Turkey) were assessed using phalangeal skeletochronology. Snout-vent length (SVL) ranged from 42.05 to 86.63 mm in males and 34.03 to 53.27 mm in females. Age of adults ranged from 2 to 8 years in males and 3 to 5 years in females. For both sexes, SVL was significantly correlated with age. Males and females of the toads reached maturity at 2 years of age.

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