Unusual motility characteristics of sperm of the spotted wolffish

Kime, David E.; Tveiten, Helge

doi:10.1111/j.1095-8649.2002.tb02497.x

Cited by 48 publications

(43 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been suggested that motility is adapted to the local environment of the egg, which in this species presents osmolality lower than the surrounding SW (Kime & Tveiten 2002) which could be related to the fact that fertilization seems to be close to 'internal' in this species (Pavlov 1994, Pavlov et al 1997.…”

Section: Introductionmentioning

confidence: 99%

Marine fish spermatozoa: racing ephemeral swimmers

Cosson

Groison²,

Suquet³

et al. 2008

Reproduction

141

150

View full text Add to dashboard Cite

After a long period of spermatogenesis (several weeks to months), marine fish spermatozoa are delivered at male spawning in seawater (SW) at the same time as ova. In some fish species, as the ova micropyle closes quickly after release, these minute unicells, the spermatozoa, have to accomplish their task of reaching the micropyle within a very brief period (several seconds to minutes), for delivery of the haploid male genetic information to the ova. To achieve this goal, their high-performance motile equipment, the flagellum, must fully activate immediately on contact with the SW and then propel the sperm cell at an unusually high initial velocity. The cost of such 'hyperactivity' is a very rapid consumption of intracellular ATP that outstrips the supply. The spermatozoa become rapidly exhausted because mitochondria cannot compensate for this very fast flagellar energy consumption. Therefore, any spermatozoon ends up with two possibilities: either becoming exhausted and immotile or reaching the egg micropyle within its very short period of forward motility (in the range of tens of seconds) before micropyle closure in relation to both contact of SWand cortical reaction. The aim of the present review is to present step by step the successive events occurring in marine fish spermatozoa from activation until their full arrest of motility. The present knowledge of activation mechanisms is summarized, as well as a description of the motility parameters characterizing the motility period. As a complement, in vitro results on axonemal motility obtained after demembranation of flagella bring further understanding. The description of the sperm energetic content (ATP and other high energy compounds) and its evolution during the swimming period is also discussed. A general model aiming to explain all the successive cellular events occurring immediately after the activation is presented. This model is proposed as a guideline for understanding the events governing the sperm lifespan in the marine fish species that reproduce through external fertilization.

show abstract

Section: Introductionmentioning

confidence: 99%

Marine fish spermatozoa: racing ephemeral swimmers

Cosson

Groison²,

Suquet³

et al. 2008

Reproduction

141

150

View full text Add to dashboard Cite

show abstract

“…In most freshwater species, sperm usually moves for less than 2 min and in many cases is only highly active for less than 30 sec [16,17,18,19]. Some fish species such as the spotted wolfish (Anarhichas minor) and the 3-and the 15-spined sticklebacks (Gasterrosteus aculeatus, and Spinachia spinachia respectively), which are characterized by release of eggs in a sticky gelatinous mass, have sperm which remains motile for a far longer period after release [20,21,22]. In a recent finding it was found that Perca fluviatilis (perch) sperm have the ability to swim for more than two hours in saline conditions [23].…”

Section: Introductionmentioning

confidence: 99%

Tale of Fish Sperm and Factors Affecting Sperm Motility: A Review

Islam¹,

Akhter²

2012

ALS

View full text Add to dashboard Cite

Motility is an important function of the male gamete, which allows sperm to actively reach and penetrate the female gamete in organisms with internal and external fertilization. Sexual activity of some fish is generally seasonal and fertilization is external. Sperm, once differentiated in the gonad, remain there completely quiescent until they are released into the external medium, which is either freshwater or sea water. Various parameters such as ion concentrations (K + , Na + , Ca 2+ ), osmotic pressure, pH, and temperature affect motility. In the present paper, we review the roles of these factors on sperm motility in the teleosts. Studying the effects of these factors on teleost sperm can help establish good activation and/or immobilizing media for improving either artificial fertilization or cryopreservation.

show abstract

“…CASA was recognized by international expert bodies as a reliable research and diagnostic tool for determining the fertility of male gametes (Eshre 1998). Examples of the effective application of CASA include studies by Kime and Tveiten (2002), who used it to evaluate fresh semen of the spotted wolffish, Anarhichas minor Olafsen. They concluded that of the of the 14 parameters measured with the CASA system, the six most vulnerable to changes in pH and activating fluid osmolality over the period of sperm activity were curvilinear velocity (VCL), straight line velocity (VSL), average path velocity (VAP), beat cross frequency (BCF), amplitude of lateral head displacement (ALH), and percentage of motile sperm (MOT).…”

Section: Introductionmentioning

confidence: 99%