Impact of Ontogenetic Changes in Branchial Morphology on Gill Function in Arapaima gigas

2010 ◽  
Vol 83 (2) ◽  
pp. 322-332 ◽  
Author(s):  
R. J. Gonzalez ◽  
C. J. Brauner ◽  
Y. X. Wang ◽  
J. G. Richards ◽  
M. L. Patrick ◽  
...  
Keyword(s):  
Ontogenetic Changes ◽  
Arapaima Gigas ◽  
Gill Function

Ontogenetic Changes in Osmatic Resistance of Erythrocytes Indicators and in Level of Dehydroepiandrosterone-Sulfate in the Serum of Rats’ Blood

2017 ◽  
Vol 2 (3) ◽  
pp. 194-200
Author(s):  
V. V. Mizin ◽  
◽  
V. P. Lyashenko ◽  
S. M. Lukashov ◽  
◽  
...  
Keyword(s):  
Dehydroepiandrosterone Sulfate ◽  
Ontogenetic Changes

Brief description of prey selectivity and ontogenetic changes in the diet of the invasive lionfish Pterois volitans (Actinopterygii, Scorpaenidae) in the Mexican Caribbean

2018 ◽  
Author(s):  
Juan Carlos Villaseñor-Derbez
Keyword(s):  
Stomach Contents ◽  
Ontogenetic Change ◽  
Prey Selectivity ◽  
Ontogenetic Changes ◽  
Pterois Volitans ◽  
Mexican Caribbean ◽  
Invasive Lionfish

Stomach contents were analyzed from 109 individuals. A total of 4 Genera and 14 Species were identified. Crustaceans accounted for %N=67.39% , %IRI= 86.37% of the total identified taxa and Teleosts %N=32.61% (%IRI = 13.63%). An ontogenetic change was observed in P. volitans diet.

AVALIAÇÃO DO CONHECIMENTO TRADICIONAL DOS PESCADORES DA RDSM APLICADO À IDENTIFICAÇÃO DO SEXO DE PIRARUCUS

2010 ◽  
Vol 5 (2) ◽  
pp. 59-66
Author(s):  
Kelven Lopes ◽  
Helder Lima de Queiroz
Keyword(s):  
Sex Determination ◽  
Traditional Knowledge ◽  
Structured Interviews ◽  
Sustainable Fisheries ◽  
Arapaima Gigas ◽  
Males And Females

This study examined the traditional knowledge of fishermen at Mamirauá Reserve about sex determination of pirarucus, Arapaima gigas Schinz 1822. We evaluated the criteria used for by fishermen in the sector Jarauá at Mamirauá Reserve for this determination, during the fisheries season, from October to November 2004. We analyzed responses of a group of about 15 fishermen collected in structured interviews regarding 109 individual pirarucus, 65 males and 44 females. From this sample, only 64 fish have their sex correctly predicted by the fishermen. Although the traditional knowledge of local fishermen is a key component of the sustainable fisheries of this species, this knowledge is not functional in all ranges and aspects, as in sex distinction. We found that the local fishermen evaluated are not able to recognize the sex of pirarucus, although some criteria applied for this purpose are consistent with their biology. The rates of correct forecasts for recognition of males and females were similar to those obtained by chance, even when the criteria applied were consistent, as the criterion “coloration”, which was significantly consistent for identification of males. Yet the group of fishermen interviewed in this study apparently did not apply this criterion correctly.

Allometric growth and ontogenetic changes in nucleic acids and digestive enzymes during the early life stage in fish species: A review

2017 ◽  
Vol 24 (3) ◽  
pp. 648 ◽  
Author(s):  
Yunlong ZHANG ◽  
Hailong ZHANG ◽  
Lingyu WANG ◽  
Beiyi GU ◽  
Qixue FAN
Keyword(s):  
Nucleic Acids ◽  
Fish Species ◽  
Early Life ◽  
Digestive Enzymes ◽  
Life Stage ◽  
Early Life Stage ◽  
Allometric Growth ◽  
Ontogenetic Changes

Ontogenetic Changes in the Respiration Coefficients of Grain Sorghum

Crop Science ◽  
1988 ◽  
Vol 28 (1) ◽  
pp. 111-113 ◽  
Author(s):  
Randal S. Stahl ◽  
J. McCree
Keyword(s):  
Grain Sorghum ◽  
Ontogenetic Changes

scholarly journals Chromosome Instability, Aging and Brain Diseases

Cells ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 1256
Author(s):  
Ivan Y. Iourov ◽  
Yuri B. Yurov ◽  
Svetlana G. Vorsanova ◽  
Sergei I. Kutsev
Keyword(s):  
Brain Aging ◽  
Chromosome Instability ◽  
Neuronal Cell Death ◽  
Neuronal Cell ◽  
Accelerated Aging ◽  
Brain Diseases ◽  
Aging Brain ◽  
Ontogenetic Changes ◽  
Health And Disease

Chromosome instability (CIN) has been repeatedly associated with aging and progeroid phenotypes. Moreover, brain-specific CIN seems to be an important element of pathogenic cascades leading to neurodegeneration in late adulthood. Alternatively, CIN and aneuploidy (chromosomal loss/gain) syndromes exhibit accelerated aging phenotypes. Molecularly, cellular senescence, which seems to be mediated by CIN and aneuploidy, is likely to contribute to brain aging in health and disease. However, there is no consensus about the occurrence of CIN in the aging brain. As a result, the role of CIN/somatic aneuploidy in normal and pathological brain aging is a matter of debate. Still, taking into account the effects of CIN on cellular homeostasis, the possibility of involvement in brain aging is highly likely. More importantly, the CIN contribution to neuronal cell death may be responsible for neurodegeneration and the aging-related deterioration of the brain. The loss of CIN-affected neurons probably underlies the contradiction between reports addressing ontogenetic changes of karyotypes within the aged brain. In future studies, the combination of single-cell visualization and whole-genome techniques with systems biology methods would certainly define the intrinsic role of CIN in the aging of the normal and diseased brain.

scholarly journals Born to sing! Song development in a singing primate

2021 ◽  
Author(s):  
Chiara De Gregorio ◽  
Filippo Carugati ◽  
Vittoria Estienne ◽  
Daria Valente ◽  
Teresa Raimondi ◽  
...  
Keyword(s):  
Vocal Communication ◽  
Developmental Trajectories ◽  
Ontogenetic Changes ◽  
Call Structure ◽  
Historical View ◽  
Singing Behavior ◽  
Vocal Behaviour ◽  
Temporal Features ◽  
Vocal Activity ◽  
Song Development

Abstract In animal vocal communication, the development of adult-like vocalization is fundamental to interact appropriately with conspecifics. However, the factors that guide ontogenetic changes in the acoustic features remains poorly understood. In contrast with a historical view of nonhuman primate vocal production as substantially innate, recent research suggests that inheritance and physiological modification can only explain some of the developmental changes in call structure during growth. A particular case of acoustic communication is the indris' singing behavior, a peculiar case among Strepsirrhine primates. Thanks to a decade of intense data collection, this work provides the first long-term quantitative analysis on song development in a singing primate. To understand the ontogeny of such a complex vocal output, we investigated juvenile and sub-adult indris' vocal behaviour, and we found that young individuals started participating in the chorus years earlier than previously reported. Our results indicated that spectro-temporal song parameters underwent essential changes during growth. In particular, the age and sex of the emitter influenced the indris' vocal activity. We found that frequency parameters showed consistent changes across the sexes, but the temporal features showed different developmental trajectories for males and females. Given the low level of morphological sexual dimorphism and the marked differences in vocal behavior, we hypothesize that factors like social influences and auditory feedback may affect songs' features, resulting in high vocal flexibility in juvenile indris. This trait may be pivotal in a species that engages in choruses with rapid vocal turn-taking.

scholarly journals Learning to Be an Orangutan—Implications of Life History for Orangutan Rehabilitation

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 767
Author(s):  
Signe Preuschoft ◽  
Ishak Yassir ◽  
Asti Iryanti Putri ◽  
Nur Aoliya ◽  
Erma Yuliani ◽  
...  
Keyword(s):  
Social Interactions ◽  
Natural Habitat ◽  
Ontogenetic Changes ◽  
Forest Environment ◽  
Surrogate Mothers ◽  
Biological Mothers ◽  
Solitary Play ◽  
Forest Strata ◽  
Weaning Age ◽  
Survival Skills

Orangutans depend on social learning for the acquisition of survival skills. The development of skills is not usually assessed in rescued orphans’ pre-release. We collected data of seven orphans over an 18-months-period to monitor the progress of ontogenetic changes. The orphans, 1.5–9 years old, were immersed in a natural forest environment with human surrogate mothers and other orphans. Social interactions deviated significantly from those of wild mother-reared immatures. Infants spent more time playing socially with peers, at the expense of resting and solitary play. Infants were also more often and at an earlier age distant from their human surrogate mothers than wild immatures are from their biological mothers. We found important changes towards an orangutan-typical lifestyle in 4- to 7-year-old orphans, corresponding to the weaning age in maternally reared immatures. The older orphans spent less time interacting with human surrogate mothers or peers, started to use the canopy more than lower forest strata and began to sleep in nests in the forest. Their time budgets resembled those of wild adults. In conclusion, juvenile orphans can develop capacities that qualify them as candidates for release back into natural habitat when protected from humanising influences and immersed in a species-typical environment.

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