Corpus ID: 23800933

Morphological diversity of sperm: A mini review

@article{Prakash2014MorphologicalDO,
  title={Morphological diversity of sperm: A mini review},
  author={S. Prakash and E. Prithiviraj and S. Suresh and N. V. Lakshmi and M. K. Ganesh and Murugesan Anuradha and L. Ganesh and Premavathy Dinesh},
  journal={Iranian Journal of Reproductive Medicine},
  year={2014},
  volume={12},
  pages={239 - 242}
}
Sperms are highly specialized cells for delivering DNA from male to the ovum. Incredibly, wide degree of diversity in sperm morphology in their basic structures i.e. head, middle piece and tail is found across species. Differences in terms of overall size of the sperm, shape and number of sperm produced are also incredible. One of the key for this variations or diversity in sperm may be associated with female reproductive tract, sperm competition, testicular size and sperm size and number… Expand
Quantity versus quality: the sperm war
TLDR
The most recent study by Lüpold et al.1 reveals that the evolution of longer sperm is driven by the female seminal receptacle and mating frequency in Drosophila, which, in turn, increases the benefits to females. Expand
The morphology of the male reproductive system, spermatogenesis and the spermatozoon of Daphnia magna (Crustacea: Branchiopoda)
TLDR
This study analyses the histological and cellular morphology of the testis and sperm development in the male Daphnia magna Straus 1820 to describe the structure of developing and mature spermatozoa. Expand
Current knowledge on boar sperm metabolism: Comparison with other mammalian species.
TLDR
This revision intends to be an overall picture of regulatory mechanisms involved in the maintenance of proper energy levels of Boar sperm and their relationship with the control of the overall boar sperm function. Expand
Review: Sperm: Comparative morphology and function related to altered reproductive strategies and fertility in mammals
TLDR
This synthesis provides a concise review of comparative anatomy and physiology of mammalian sperm structure and how inevitable changes regulate fertility. Expand
Progress in Research on Sperm DNA Fragmentation
TLDR
This review aimed to outline the research status of SDF mechanism and detection technology-related issues, as well as the effect of increased SDF rate, aiming to provide a basis for clinical male infertility diagnosis and treatment. Expand
Etiologies of sperm oxidative stress
TLDR
Spermatozoa need small amounts of ROS to acquire the ability of nuclear maturation regulation and condensation to fertilize the oocyte, indicating that oxidative stress is one of the main cause of DNA damage in the germ cells, then there should be good reason for antioxidant therapy in these conditions. Expand
Characterization of Human Spermatic Subpopulations by ConA-Binding Sites and Tyrosine Phosphorylation during in vitro Capacitation and Acrosome Reaction
TLDR
Novel insights are provided regarding spermatozoa subpopulations based on essential physiological events like capacitation and acrosome reaction, which could have potential implications in the improvement of spermatozosa selection techniques. Expand
Does myoinositol supplement improve sperm parameters and DNA integrity in patients with oligoasthenoteratozoospermia after the freezing–thawing process?
TLDR
Results showed that MYO could be a good supplement for sperm freezing to reduce the detrimental effects of freezing process especially on DNA integrity, which is an important factor in the success of ART, in OAT suffered patients. Expand
Supplementation of sperm freezing medium with myoinositol improve human sperm parameters and protects it against DNA fragmentation and apoptosis
TLDR
The findings support the use of 2 mg/mL myoinositol supplemented freezing media in sperm cryopreservation to increase sperm quality after freezing–thawing procedures. Expand
The penile baculum in monkey (Macaca radiata), rat (Rattus norvegicus), and bat (Pipistrellus mimus) and its functional significance—a mini review
TLDR
The presence of the os penis would be helpful for the penis erection and stiffness and vaginal friction, and its specific functional significance and the explanation for this general adaptive diversity across species is challenging. Expand
...
1
2
...

References

SHOWING 1-10 OF 54 REFERENCES
How the sperm lost its tail: the evolution of aflagellate sperm
  • E. H. Morrow
  • Biology, Medicine
  • Biological reviews of the Cambridge Philosophical Society
  • 2004
TLDR
Weak evidence is provided suggesting that the evolution of aflagellate sperm could be linked to the removal of selective pressures generated by sperm competition, which occurs when the sperm of two or more males compete to fertilize a female's ova. Expand
Mammalian sperm morphometry
  • M. Gage
  • Biology, Medicine
  • Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 1998
TLDR
This comparative study attempts to address some fundamental questions of the evolution of mammalian sperm morphometry to explore relationships between the morphometric dimensions of the three essential spermatozoal components: head, mid–piece and flagellum. Expand
THE EVOLUTION OF SPERM SIZE IN BIRDS
TLDR
It is suggested that future models of sperm‐size evolution consider not only the role of sperm competition, but also how female control and manipulation of ejaculates after insemination selects for different sperm morphologies. Expand
Sperm Competition in Fishes: The Evolution of Testis Size and Ejaculate Characteristics
TLDR
It is found that both the gonadosomatic index and sperm numbers increase with intensity of sperm competition across species but that sperm length decreases, which does not fit predictions of current sperm competition theory. Expand
Female reproductive biology and the coevolution of ejaculate characteristics in fish
TLDR
It is found that sperm numbers increase with ova numbers among externally fertilizing species, fitting the predictions of theoretical models, however, sperm numbers are apparently not related to ovum size. Expand
Sperm competition in bats
  • D. Hosken
  • Biology, Medicine
  • Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 1997
TLDR
A significant positive relationship between social group size and testis mass is found across 31 species of microchiropteran bat and comparative analysis of independent contrast (CAIC) finds it positively related to sperm competition risk in a wide range of taxa. Expand
Coevolution between male ejaculates and female reproductive biology in eutherian mammals
  • M. Gomendio, E. Roldan
  • Biology, Medicine
  • Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 1993
TLDR
It is argued that differences in female reproductive biology may also have influenced the evolution of sperm numbers as well as several other sperm traits, suggesting that variation in sperm fertile lifespan may be related to differences in sperm size. Expand
Linking sperm length and velocity: the importance of intramale variation
TLDR
It is shown that sperm length and velocity are highly correlated in the sea urchin Heliocidaris erythrogramma, but importantly it is reported that failure to account for within-male variation in these sperm traits can obscure this relationship. Expand
Sperm size and sperm competition in birds
  • J. Briskie, R. Montgomerie
  • Biology, Medicine
  • Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 1992
TLDR
It is concluded that sperm competition influences sperm size in birds and detailed study of this interaction will provide a new dimension to the study of avian mating systems. Expand
Sperm competition: linking form to function
TLDR
It is shown that increased sperm length is unlikely to be driven by selection for increased swimming speed, and that the relative lengths of a sperm's constituent parts, rather than their absolute lengths, are likely to be the target of selection. Expand
...
1
2
3
4
5
...