scholarly journals Amphibian Hormones, Calcium Physiology, Bone Weight, and Lung Use Call for a More Inclusive Approach to Understanding Ossification Sequence Evolution

2021 ◽  
Vol 9 ◽  
Author(s):  
Christopher S. Rose
Keyword(s):  
Life Histories ◽  
Skeletal Development ◽  
Sequence Evolution ◽  
Larval Habitats ◽  
Inclusive Approach ◽  
Embryonic Origin ◽  
Ossification Sequences ◽  
Ossification Process ◽  
And Behavior ◽  
Ossification Sequence

Skeleton plays a huge role in understanding how vertebrate animals have diversified in phylogeny, ecology and behavior. Recent evo-devo research has used ossification sequences to compare skeletal development among major groups, to identify conserved and labile aspects of a sequence within a group, to derive ancestral and modal sequences, and to look for modularity based on embryonic origin and type of bone. However, questions remain about how to detect and order bone appearances, the adaptive significance of ossification sequences and their relationship to adult function, and the utility of categorizing bones by embryonic origin and type. Also, the singular focus on bone appearances and the omission of other tissues and behavioral, ecological and life history events limit the relevance of such analyses. Amphibians accentuate these concerns because of their highly specialized biphasic life histories and the exceptionally late timing, and high variability of their ossification sequences. Amphibians demonstrate a need for a whole-animal, whole-ontogeny approach that integrates the entire ossification process with physiology, behavior and ecology. I discuss evidence and hypotheses for how hormone mediation and calcium physiology might elicit non-adaptive variability in ossification sequence, and for adaptive strategies to partition larval habitats using bone to offset the buoyancy created by lung use. I also argue that understanding plasticity in ossification requires shifting focus away from embryonic development and adult function, and toward postembryonic mechanisms of regulating skeletal growth, especially ones that respond directly to midlife environments and behaviors.

scholarly journals Comparative description and ossification patterns of Dendropsophus labialis (Peters, 1863) and Scinax ruber (Laurenti, 1758)(Anura: Hylidae)

2017 ◽  
Author(s):  
Angélica Arenas Rodríguez ◽  
Juan Francisco Rubiano ◽  
Julio Mario Hoyos
Keyword(s):  
Comparative Studies ◽  
Skeletal Development ◽  
Spinal Column ◽  
Transverse Process ◽  
Life Cycles ◽  
Larval Stages ◽  
Staining Techniques ◽  
Ossification Sequences ◽  
Comparative Description ◽  
Ossification Sequence

Although comparative studies of anuran ontogeny have provided new data on heterochrony in the life cycles of frogs, most of them have not included Colombian species. Using different staining techniques, we describe the cranial and poscranial elements development in two hylid species, Scinax ruber and Dendropsophus labialis, providing new data for more comprehensive ontogenetic studies in Neotropical frogs. We examined specimens from Gosner stages 25 to 45. We found differences in the infrarostral and suprarostral cartilages, optic foramen, planum ethmoidale, and the gill apparatus. In the ossification sequence, one of the first elements to ossify were the transverse process of spinal column and atlas in both species, and the parasphenoid in the skull. New descriptions of skeletal development and ossification sequences of larval stages of these two species, especially data concerning the postcranium, contribute with useful information for analysis of sequential heterochrony, because although the hylids are widely known, there are few works (15 of 700 species) about ossification sequence that include the whole skeleton.

scholarly journals Comparative description and ossification patterns of Dendropsophus labialis (Peters, 1863) and Scinax ruber (Laurenti, 1758)(Anura: Hylidae)

2017 ◽  
Author(s):  
Angélica Arenas Rodríguez ◽  
Juan Francisco Rubiano ◽  
Julio Mario Hoyos
Keyword(s):  
Comparative Studies ◽  
Skeletal Development ◽  
Spinal Column ◽  
Transverse Process ◽  
Life Cycles ◽  
Larval Stages ◽  
Staining Techniques ◽  
Ossification Sequences ◽  
Comparative Description ◽  
Ossification Sequence

Although comparative studies of anuran ontogeny have provided new data on heterochrony in the life cycles of frogs, most of them have not included Colombian species. Using different staining techniques, we describe the cranial and poscranial elements development in two hylid species, Scinax ruber and Dendropsophus labialis, providing new data for more comprehensive ontogenetic studies in Neotropical frogs. We examined specimens from Gosner stages 25 to 45. We found differences in the infrarostral and suprarostral cartilages, optic foramen, planum ethmoidale, and the gill apparatus. In the ossification sequence, one of the first elements to ossify were the transverse process of spinal column and atlas in both species, and the parasphenoid in the skull. New descriptions of skeletal development and ossification sequences of larval stages of these two species, especially data concerning the postcranium, contribute with useful information for analysis of sequential heterochrony, because although the hylids are widely known, there are few works (15 of 700 species) about ossification sequence that include the whole skeleton.

scholarly journals Comparative description and ossification patterns ofDendropsophus labialis(Peters, 1863) andScinax ruber(Laurenti, 1758) (Anura: Hylidae)

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4525 ◽  
Author(s):  
Angélica Arenas-Rodríguez ◽  
Juan Francisco Rubiano Vargas ◽  
Julio Mario Hoyos
Keyword(s):  
Comparative Studies ◽  
Vertebral Column ◽  
Skeletal Development ◽  
Life Cycles ◽  
Differential Staining ◽  
Large Group ◽  
Staining Techniques ◽  
Ossification Sequences ◽  
Comparative Description ◽  
Ossification Sequence

Although comparative studies of anuran ontogeny have provided new data on heterochrony in the life cycles of frogs, most of them have not included ossification sequences. Using differential staining techniques, we observe and describe differences and similarities of cranial and postcranial development in two hylid species,Scinax ruber(Scinaxinae) andDendropsophus labialis(Hylinae), providing new data of ontogenetic studies in these Colombian species. We examined tadpoles raining from Gosner Stages 25 to 45. We found differences between species in the infrarostral and suprarostral cartilages, optic foramen, planum ethmoidale, and gill apparatus. In both species, the first elements to ossify were the atlas and transverse processes of the vertebral column and the parasphenoid. Both species exhibited suprascapular processes as described in other hylids. Although the hylids comprise a large group (over 700 species), postcranial ossification sequence is only known for 15 species. Therefore, the descriptions of the skeletal development and ossification sequences provided herein will be useful for future analyses of heterochrony in the group.

Hormones and Behavior

2019 ◽  
pp. 11-26
Author(s):  
Maren N. Vitousek ◽  
Laura A. Schoenle
Keyword(s):  
Life History ◽  
Life Histories ◽  
Life History Traits ◽  
Developmental Plasticity ◽  
Endocrine System ◽  
Phenotypic Traits ◽  
Social Environments ◽  
Trade Offs ◽  
And Behavior

Hormones mediate the expression of life history traits—phenotypic traits that contribute to lifetime fitness (i.e., reproductive timing, growth rate, number and size of offspring). The endocrine system shapes phenotype by organizing tissues during developmental periods and by activating changes in behavior, physiology, and morphology in response to varying physical and social environments. Because hormones can simultaneously regulate many traits (hormonal pleiotropy), they are important mediators of life history trade-offs among growth, reproduction, and survival. This chapter reviews the role of hormones in shaping life histories with an emphasis on developmental plasticity and reversible flexibility in endocrine and life history traits. It also discusses the advantages of studying hormone–behavior interactions from an evolutionary perspective. Recent research in evolutionary endocrinology has provided insight into the heritability of endocrine traits, how selection on hormone systems may influence the evolution of life histories, and the role of hormonal pleiotropy in driving or constraining evolution.

Seasonal reproductive anatomy and sperm storage in pleurocerid gastropods (Cerithioidea: Pleuroceridae)

2014 ◽  
Vol 92 (12) ◽  
pp. 989-995 ◽  
Author(s):  
Nathan V. Whelan ◽  
Ellen E. Strong
Keyword(s):  
Seasonal Variation ◽  
Life Histories ◽  
Gross Anatomy ◽  
Egg Laying ◽  
Conservation Strategies ◽  
Freshwater Species ◽  
Form And Function ◽  
Reproductive Anatomy ◽  
And Function ◽  
And Behavior

Life histories, including anatomy and behavior, are a critically understudied component of gastropod biology, especially for imperiled freshwater species of Pleuroceridae. This aspect of their biology provides important insights into understanding how evolution has shaped optimal reproductive success and is critical for informing management and conservation strategies. One particularly understudied facet is seasonal variation in reproductive form and function. For example, some have hypothesized that females store sperm over winter or longer, but no study has explored seasonal variation in accessory reproductive anatomy. We examined the gross anatomy and fine structure of female accessory reproductive structures (pallial oviduct, ovipositor) of four species in two genera (round rocksnail, Leptoxis ampla (Anthony, 1855); smooth hornsnail, Pleurocera prasinata (Conrad, 1834); skirted hornsnail, Pleurocera pyrenella (Conrad, 1834); silty hornsnail, Pleurocera canaliculata (Say, 1821)). Histological analyses show that despite lacking a seminal receptacle, females of these species are capable of storing orientated sperm in their spermatophore bursa. Additionally, we found that they undergo conspicuous seasonal atrophy of the pallial oviduct outside the reproductive season, and there is no evidence that they overwinter sperm. The reallocation of resources primarily to somatic functions outside of the egg-laying season is likely an adaptation that increases survival chances during winter months.

scholarly journals Analyses of the core eukaryotic protein subunit of telomerase support extensive adaptation to different evolutionary and life histories in the Metazoa

2016 ◽  
Author(s):  
Alvina G. Lai ◽  
Natalia Pouchkina-Stantcheva ◽  
Alessia Di Donfrancesco ◽  
Gerda Kildisiute ◽  
Sounak Sahu ◽  
...  
Keyword(s):  
Alternative Splicing ◽  
Life Histories ◽  
Evolutionary History ◽  
Structural Evolution ◽  
Sequence Evolution ◽  
Dynamic Feature ◽  
Protein Subunit ◽  
Eukaryotic Protein ◽  
Telomere Biology ◽  
Splice Forms

AbstractMost animals employ telomerase, which consists of a catalytic subunit known as the telomerase reverse transcriptase (TERT) and an RNA template, to maintain telomere ends. Given the importance of TERT and the apparent importance of telomere biology in core metazoan life history traits like ageing and the control of somatic cell proliferation, we hypothesised that TERT would have patterns of sequence and regulatory evolution reflecting adaptations to diverse evolutionary and life histories across the Animal Kingdom. To test this, we performed a complete investigation of the evolutionary history of TERT across animals. We show that although TERT is almost ubiquitous across Metazoa, it has undergone substantial sequence evolution in canonical motifs. Beyond the known canonical motifs, we also identify and compare regions that are highly variable between lineages, but for which conservation exists within phyla. Recent data have highlighted the importance of alternate splice forms of TERT in non-canonical functions in some animals. Although animals may share some conserved introns, we find that the selection of exons for alternative splicing appears to be highly variable, and regulation by alternative splicing appears to be a very dynamic feature of TERT evolution. We show that even within a closely related group of triclad flatworms, where alternative splicing of TERT was previously correlated with reproductive strategy, we observe highly diverse alternative splicing patterns. Our work establishes that the evolutionary history and structural evolution of TERT involves previously unappreciated levels of change, supporting the view that this core eukaryotic protein has adapted to the requirements of diverse animal life histories.

Issues Based on Species Life History and Behavior

2021 ◽  
pp. 89-94
Author(s):  
Joseph A. Veech
Keyword(s):  
Life History ◽  
Habitat Use ◽  
Life Histories ◽  
Radio Telemetry ◽  
Spatial Scales ◽  
Habitat Associations ◽  
Habitat Characteristics ◽  
Habitat Analysis ◽  
The Individual ◽  
And Behavior

Species vary tremendously in their life histories and behavior. The particular life history traits and behavior of the focal species must be considered when designing a study to examine habitat associations. For some species, individuals use different areas (of the landscape or territory) for breeding and foraging. As such, the important characteristics for the foraging and breeding habitats may be different. The dramatically different life stages of some organisms (e.g., amphibians and some insects) often correspond to equally dramatic differences in habitat use between juveniles and adults. For some species, habitat use differs among seasons. Species that are highly mobile and have individuals that move around substantially on a daily or weekly basis are particularly challenging for a habitat analysis. For these species, the most efficient and appropriate study design may be one that tracks individuals (through radio-telemetry or GPS) and analyzes the environmental or habitat characteristics at locations where the individual has stopped, rather than trying to survey for the species in pre-established and insufficiently small survey plots. In addition, individual movement and the issues mentioned above may necessitate that environmental variables are measured and analyzed at multiple spatial scales.

The Classification of Larval Tabanidae

1964 ◽  
Vol 96 (1-2) ◽  
pp. 159-159
Author(s):  
H. J. Teskey
Keyword(s):  
Life History ◽  
North American ◽  
Life Histories ◽  
North American Species ◽  
Immature Stages ◽  
Larval Habitats ◽  
The North

Relatively little is known of the life history, ecology and behaviour of most species of Tabanidae. Knowledge of their immature stages is particularly deficient. The larvae of only 46, or about ⅛, of the North American species have been described and many of these descriptions are inadequate. The present research was initiated in 1960 to describe and classify tabanid larvae and to contribute information on larval habitats and life histories.

scholarly journals Do Slower Life History Strategies Reduce Sociodemographic Sex Differences?

2015 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Cindy Elizabeth Chavarria Minera ◽  
Aurelio José Figueredo ◽  
Laura Gail Lunsford
Keyword(s):  
Sex Differences ◽  
Life History ◽  
Sex Ratio ◽  
Life Histories ◽  
Educational Achievement ◽  
Federal District ◽  
The United States ◽  
Life History Strategies ◽  
Mortality And Morbidity ◽  
And Behavior

This study examines the relations between sociodemographic sex differences and life history strategies in the populations of Mexican States. Sex differences in anatomy and behavior was measured with traits such as educational achievement, mortality, and morbidity. The data were obtained from the Instituto Nacional de Estadística y Geografía (INEGI) and sampled from thirty-one Mexican states and the Federal District (N = 32). An extension analysis was performed selecting only the sex ratio variables that had a correlation with the slow Life History factor greater than or equal to an absolute value of .25. A unit-weighted sex ratio factor was created using these variables. Across 32 Mexican states, the correlation between latent slow life history and sex ratio was .57 (p < .05). These results are consistent with our hypothesis that slower life histories favor reduced sexual dimorphism in physiology and behavior among human subnational populations. The results of the study further understanding of variations in population sex differences, male-biased behaviors toward sexual equality, and the differences among subnational (regional) populations within the United States of Mexico. DOI:10.2458/azu_jmmss_v6i1_chavarria_minera

scholarly journals Pemetaan Habitat Jentik Nyamuk Di Kecamatan Cibalong, Kabupaten Garut, Provinsi Jawa Barat

2019 ◽  
Vol 13 (2) ◽  
pp. 115-124
Author(s):  
Andri Ruliansyah ◽  
Wawan Ridwan ◽  
Asep Jajang Kusnandar
Keyword(s):  
Global Positioning System ◽  
Positioning System ◽  
Breeding Sites ◽  
Larval Habitats ◽  
Vector Borne Diseases ◽  
Global Positioning ◽  
Mosquito Breeding ◽  
Vector Borne ◽  
And Behavior ◽  
Culex Sp

Abstract The environment is an important factor in transmitting vector-borne diseases where an environment is a place of interaction between hosts, agents, and vectors. The existence of mosquitoes as a vector of various types of diseases is influenced by the existence of mosquito breeding habitats in an area. The results of mapping can be a guide to finding larva habitat when carrying out vector control. In addition, there is no map of larva habitat in Cibalong Subdistrict, Garut Regency so that mapping of breeding sites and behavior of mosquitoes becomes very important. The purpose of this study was to map the mosquito larval habitats in Cibalong District, Garut regency. Data collection was done by plotting habitats using Global Positioning System (GPS) and larva identifications using a compound microscope. Habitat larvae found in Karangparanje, Karyasari Village and Sakambangan, Mekarwangi Village, dominated by rice fields and water streams. While larvae found were Culex sp, Anopheles sp, Aedes sp, and Malaya sp. This finding confirmed that  Cibalong District receptive as a transmitting area of ​​Malaria, DHF, and Filaria, so it is necessary to be aware of the possibility of transmission of vector-borne diseases in those areas. Abstrak Lingkungan merupakan faktor penting dalam penularan penyakit tular vektor di mana lingkungan merupakan tempat berinteraksi antara host , agen dan vektor. Keberadaan nyamuk sebagai vektor berbagai macam penyakit dipengaruhi oleh keberadaan habitat perkembangbiakan nyamuk di suatu wilayah. Hasil suatu pemetaan dapat menjadi panduan untuk menemukan habitat jentik pada saat melakukan pengendalian vektor. Selain itu belum adanya suatu peta habitat jentik di Kecamatan Cibalong Kabupaten Garut sehingga pemetaan tempat perkembangbiakan dan perilaku nyamuk menjadi sangat penting. Tujuan kajian ini untuk memetakan habitat jentik nyamuk di Kecamatan Cibalong  Kabupaten Garut. Pengumpulan data dilakukan dengan membuat titik (plotting)  habitat dengan menggunakan Global Positioning System (GPS) dan identifikasi jentik menggunakan mikroskop binokuler. Habitat jentik yang ditemukan di  Dusun Karangparanje Desa Karyasari dan Dusun Sakambangan Desa Mekarwangi, didominasi oleh sawah dan aliran sungai. Sedangkan jentik yang ditemukan yaitu Culex sp, Anopheles sp, Aedes sp dan Malaya sp. Hal ini menjadikan Kecamatan Cibalong reseptif sebagai daerah penular malaria, DBD, dan filaria, sehingga perlu diwaspadai kemungkinan terjadinya penularan penyakit tular vektor di wilayah tersebut.

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