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Tarantula Breeding
deceased specimen donations for private research?
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<blockquote data-quote="Thistles" data-source="post: 104303" data-attributes="member: 3949"><p>I don't know what you're asking regarding a female's durability, so I can't help you there. As far as size goes, every individual female will be slightly different, and there is tremendous variation across species in the size and shape of spermathecae, with some species lacking them altogether, if I understand your question correctly.</p><p></p><p>As for egg laying, some females will lay phantom sacs regardless of whether they've mated. The eggs are fertilized as or soon after they are laid, so they develop more or less independently of insemination. A female can theoretically lay fertile eggs immediately after mating if she already had them made and was preparing to lay an infertile phantom sac. Some species are more prone to this than others. I suspect that pairing is an important initial trigger for egg production in many/most species, but not enough is known about it. For many species there are a number of different triggers, from seasonal change making her receptive to pairing, to food abundance and more seasonal change to stimulate her to lay the eggs. It's complicated.</p><p></p><p>That's a neat observation about your smithi, [USER=7681]@Metalman2004[/USER]. I've caught some of my boys at it, and even filmed one, but it isn't an everyday sighting even though I have maybe 2 dozen MMs at the moment. Maybe he was just an exhibitionist!</p></blockquote><p></p>
[QUOTE="Thistles, post: 104303, member: 3949"] I don't know what you're asking regarding a female's durability, so I can't help you there. As far as size goes, every individual female will be slightly different, and there is tremendous variation across species in the size and shape of spermathecae, with some species lacking them altogether, if I understand your question correctly. As for egg laying, some females will lay phantom sacs regardless of whether they've mated. The eggs are fertilized as or soon after they are laid, so they develop more or less independently of insemination. A female can theoretically lay fertile eggs immediately after mating if she already had them made and was preparing to lay an infertile phantom sac. Some species are more prone to this than others. I suspect that pairing is an important initial trigger for egg production in many/most species, but not enough is known about it. For many species there are a number of different triggers, from seasonal change making her receptive to pairing, to food abundance and more seasonal change to stimulate her to lay the eggs. It's complicated. That's a neat observation about your smithi, [USER=7681]@Metalman2004[/USER]. I've caught some of my boys at it, and even filmed one, but it isn't an everyday sighting even though I have maybe 2 dozen MMs at the moment. Maybe he was just an exhibitionist! [/QUOTE]
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deceased specimen donations for private research?
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