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Sphragis


Sphragis
Photo Information
Copyright: Helmut Roos (buscape) Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 355 W: 20 N: 1518] (7615)
Genre: Animals
Medium: Color
Date Taken: 2012-06-01
Categories: Insects
Camera: Nikon D 800E, AF-S Micro Nikkor 105mm 1:2.8G VR, Nikon TC14EII
Exposure: f/10.0, 1/200 seconds
Photo Version: Original Version, Workshop
Date Submitted: 2012-06-05 6:24
Viewed: 2280
Points: 32
[Note Guidelines] Photographer's Note
English:

A mating plug, also known as a copulation plug, sperm plug, vaginal plug, or sphragis, is gelatinous secretion used in the mating of some species. It is deposited by a male into a female genital tract and later hardens into a plug or glues the tract together. While females can expel the plugs, the male’s sperm still gets a time advantage in getting to the egg, which is often the deciding factor in fertilization.
The mating plug plays an important role in sperm competition and may serve as an alternative and more advantageous strategy to active mate guarding. In some species, such a passive mate-guarding strategy may reduce selection on large male size. Such a strategy may be advantageous because it would allow a male to increase reproductive success by spending more time pursuing new female mates rather than active mate-guarding.
Occurance in nature:
Mating plugs are used by many species, including several primates, bees, rats, reptiles, squirrels, scorpions, mice and spiders. Use of a mating plug as a strategy for reproductive success can also be seen in a few taxa of Lepidoptera and other insects and is often associated with pupal mating.

Source: Wikioedia

There is one more picture in the workshop. It shows a male trying unsuccessfully to copulate with a female that already has a sphragis.

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Deutsch:

Mit Sphragis wird ein horniges Gebilde aus Chitin am Hinterleib von weiblichen Schmetterlingen bezeichnet, welches aus einem weißen Sekret des männlichen Falters nach der Begattung gebildet wird und noch während der Paarung aushärtet. Sie verhindert eine erneute Begattung, kann mehrere Millimeter lang werden und befindet sich an der Unterseite des Hinterleibs. Besonders stark ausgeprägt ist sie bei Arten der Unterfamilie Parnassiinae in der Familie der Ritterfalter, von der in Mitteleuropa der Rote Apollo, der Schwarze Apollo und der Alpenapollo vorkommen.
Der Name kommt vom altgriechischen σφραγίς, das Siegel. Die deutsche Bezeichnung Begattungstasche ist nicht eindeutig, da sie auch für die Bursa copulatrix der Wirbellosen benutzt wird, zu denen auch die Insekten gehören.

Quelle: Wikipedia

Im Workshop findet man ein weiteres Bild. Es zeigt ein Männchen wie es unerfolgreich versucht ein Weibchen zu begatten, das schon eine Sphragis hat.

maaciejka, eqshannon, flashpoint, Marco2010, anel, parasbhalla, CeltickRanger, josediogo1958 has marked this note useful
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Critiques [Translate]

hallo helmut
very good sharpness picture with good details and lovely colours
thanks greeting lou

  • Great 
  • PeterZ Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5137 W: 166 N: 13121] (49139)
  • [2012-06-05 7:08]

Hello Helmut,
Excellent sharp photo in beautiful natural colours. Fine composition.
Regards,
Peter

  • Great 
  • lousat Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 6595 W: 89 N: 15659] (65489)
  • [2012-06-05 7:15]

Hi Helmut,another magnificent capture in this serie,perfect like the others,very interesting moment for the life of this specie,a lucky meeting caught at the best.Have a nice evening and thanks,Luciano

Hello Helmut,
Amazing photo of this Butterfly, fantastic sharp and colorful details, useful description of the mating, TFS!

  • Great 
  • batu Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1079 W: 293 N: 4497] (16383)
  • [2012-06-05 8:17]

Hallo Helmut,
ein tolles Dokument! Genau richtig für TrekNature!
Perspektive und Belichtung stimmen 100%.
Schöne Grüße, Peter

HI Helmut,
amazing warm colours. Perfect composition. Great sharpness and details.
Have a nice evening,
Maciek

Superior technical work and very little post work needed, Although it is another butterfly, that indeed is what Trek Nature was meant to be.. a showcase of nature from differing perspectives and yours is just a cut above the rest sir.
Bob

barthatibor
Hello Helmut,
Excellent photo,excellent setting and background,great sharp details,very fine colors and compozition.
Regards,Tibi

  • Great 
  • siggi Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3097 W: 109 N: 12399] (52850)
  • [2012-06-05 10:03]

Hello Helmut.
Excellent sharp shot with stunning perspective. The detail is amazing Thanks for sharing and best regards Siggi

Ciao Helmut.
Sempre più belle le riesci ha fotografare queste farfalle, splendida questa con un’ottima nitidezza ed dei colori meravigliosi,molto bella la composizione bravo.
Ciao Marco.

  • Great 
  • anel Gold Star Critiquer/Gold Note Writer [C: 3053 W: 3 N: 8715] (40574)
  • [2012-06-05 11:43]

Lieber Helmut,
Deine Serie über den Schwarzen Apoll ist sehr erfreulich und höchst interessant! Leider habe ich mich noch nicht gemeldet, da ich vor Schwindel kaum lesen und schreiben kann. Es geht ein wenig besser jetzt. Dieses Posting über die Sphragis ist sehr speziell, ich wusste, dass es dies gibt, aber nicht bei welchen Schmetterling-Spezies. Der Schwarze Apoll ist also auch so ein Macho!
Herzlich dankt
Anne

An amazing closeup shot from a butterfly with amazing wings, Helmut!

Good management of light and exposure where the focus and sharpness are well kept too.
The DOF is well done, and colors are natural too.
I like the semi- to nearly-transparent wings of the butterfly.
Well done!

Kind regards,
Paras

Ciao Helmut, great macro of lovely buterfly, fantastic details, splendid sharpness and wonderful natural colors, very well done, my friend, ciao Silvio

Hello Helmut

Great macro, with fine POV and framing,
superb focus, sharpness and details, TFS

Asbed

  • Great 
  • deud Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 438 W: 11 N: 534] (2540)
  • [2012-06-05 16:59]

beautiful shot!

love the dof, beautiful colors.
nice composition.
very well done!

tfs

  • Great 
  • nagraj Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1618 W: 106 N: 3208] (15166)
  • [2012-06-06 0:17]

Hi,
Beautiful frame for this lovely butterfly, good exposure to get greens. tfs.
nagraj.v

Bom dia Helmut
Sharp and clear pic my Friend.Lovely composition,wonderful colours and lighting and excellent details.Congrats!
Thank You
Kind regards
J.Diogo

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