Results 21 to 30 of about 154,792 (190)

Characterization of Bottlenose Dolphin (Tursiops truncatus) Sperm Based on Morphometric Traits

open access: yesBiology, 2021
Bottlenose dolphin (Tursiops truncatus) males follow many reproductive strategies to ensure their paternity. However, little is known about the sperm traits, including morphometric features, that contribute to their reproductive success.
María del Carmen Fuentes-Albero   +9 more
doaj   +1 more source

Psychological and physiological adaptations to sperm competition in humans [PDF]

open access: yes, 2005
Postcopulatory competition between males, in the form of sperm competition, is a widespread phenomenon in many animal species. The extent to which sperm competition has been an important selective pressure during human evolution remains controversial ...
Pound, N, Goetz, AT, Shackelford, TK
core   +6 more sources

Identification of honey bee sperm structures following the use of various staining techniques

open access: yesJournal of Veterinary Research, 2023
Bees are currently artificially inseminated on a large scale for breeding and research purposes. The sperm of bees has a complex and varied structure, and determination of specific morphological defects in it is very difficult. Its comprehensive analysis
Banaszewska Dorota, Andraszek Katarzyna
doaj   +1 more source

By Hook or by Crook? Morphometry, Competition and Cooperation in Rodent Sperm [PDF]

open access: yesPLoS ONE, 2007
Sperm design varies enormously across species and sperm competition is thought to be a major factor influencing this variation. However, the functional significance of many sperm traits is still poorly understood. The sperm of most murid rodents are characterised by an apical hook of the sperm head that varies markedly in extent across species.
Immler, S.   +3 more
openaire   +6 more sources

Sperm quality and morphometry characterization of cryopreserved canine sperm in ACP-106c or TRIS

open access: yesAnimal Reproduction, 2022
Morphological sperm evaluation supported by the morphometry can be used in the determination of the seminal quality and in the investigation of potential extenders. Although there are studies comparing TRIS and ACP extenders, there are no comparative studies between them for the computerized assisted semen analysis (CASA), sperm viability, membrane ...
Diego Oliveira Teixeira   +5 more
openaire   +3 more sources

Current status and potential of morphometric sperm analysis

open access: yesAsian Journal of Andrology, 2016
The spermatozoon is the most diverse cell type known and this diversity is considered to reflect differences in sperm function. How the diversity in sperm morphology arose during speciation and what role the different specializations play in sperm ...
Alejandro Maroto-Morales   +6 more
doaj   +1 more source

Automatic classification of the acrosome status of boar spermatozoa using digital image processing and LVQ [PDF]

open access: yes, 2006
We consider images of boar spermatozoa obtained with an optical phase-contrast microscope. Our goal is to automatically classify single sperm cells as acrosome-intact (class 1) or acrosome-damaged (class 2).
Petkov, Nicolai   +8 more
core   +3 more sources

Sperm competition games: optimal sperm allocation in response to the size of competing ejaculates [PDF]

open access: yes, 2007
Engqvist L, Reinhold K. Sperm competition games: optimal sperm allocation in response to the size of competing ejaculates. Proceedings of the Royal Society B.
Reinhold, Klaus   +1 more
core   +1 more source

The correlation between spermatozoa morphometry and the testosterone levels in the epididymis of aceh cow [PDF]

open access: yesE3S Web of Conferences, 2020
The objective of this study was to determine the correlation between spermatozoa morphometry and testosterone concentration in the epididymal caput, corpus, and cauda of aceh cattle. The epididymal sperm swab slides were stained using Williams's staining
Wahyuni Sri   +9 more
doaj   +1 more source

Geometric morphometrics of rodent sperm head shape. [PDF]

open access: yesPLoS ONE, 2013
Mammalian spermatozoa, particularly those of rodent species, are extremely complex cells and differ greatly in form and dimensions. Thus, characterization of sperm size and, particularly, sperm shape represents a major challenge. No consensus exists on a
María Varea Sánchez   +2 more
doaj   +1 more source

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