Canibalismo: Aranha macho foge para evitar ser comido pela fêmea

SELEÇÃO SEXUAL

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[{"selector":"#anim-b55c8776-a673-4209-8efd-83708af0bc1d","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-856300e0-9f51-463c-b8e9-9a2198935716","keyframes":{"transform":["translate3d(0px, -480.87303%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-96c8eb1c-7dcc-49fe-bb2b-2ec49c5aa8e1 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate(-7.105427357601002e-15%, 0%) scale(1.5)","translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] Philoponella prominens são aranhas sociais, o que significa que vivem em grupos. Logo após o acasalamento, no entanto, o comportamento das fêmeas não parece muito amigável Giphy

[{"selector":"#anim-c0010290-32f4-45df-96c8-e67c6ed44f54","keyframes":{"transform":["translate3d(127.95031%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1044,"easing":"cubic-bezier(.2, 0, .8, 1)","fill":"both"}] [{"selector":"#anim-08aeef31-5e4c-4f14-8aec-225b0a5b2929","keyframes":[{"transform":"rotateZ(180deg)"},{"transform":"rotateZ(0deg)"}],"delay":0,"duration":1200,"easing":"cubic-bezier(.2, 0, .5, 1)","fill":"forwards"}] [{"selector":"#anim-caeb83d3-edee-43df-acb0-29f6342f9e8c [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(29.449999875303394%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] Segundo uma nova pesquisa, o aracnídeo macho precisa pular rapidamente para evitar ser comido por sua parceira após o acasalamento Wikimedia Commons

[{"selector":"#anim-efb3e7e8-416e-41f0-8021-8533bc43b388","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-8ee28ef0-0125-42af-b72e-ef21abab83ec","keyframes":{"transform":["translate3d(98.91304%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-9624cb9a-773b-4921-9b6f-10044d0e0e66 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-21.874999829338588%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] Outras espécies de aranhas, como a redback, praticam o canibalismo sexual, mas este é o primeiro relato de uma espécie de aranha usando ações super rápidas para tentar escapar de suas parceiras Wikimedia Commons

[{"selector":"#anim-c12651ad-a6b9-40b4-b80d-1f8fca3c00c9","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-24efbef4-72a1-4703-bc12-4ce85f1f7319","keyframes":{"transform":["translate3d(-103.8806%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-56dc8479-db5a-43f3-813d-4f3e0081967a","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-dab1e332-57aa-48a5-956c-8f234296234d","keyframes":{"transform":["translate3d(-97.24518%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-eae0dc0d-5260-43ee-92bc-8ee16220919e","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-f5adfd09-efa9-4040-a6c9-f46c7b41e984","keyframes":{"transform":["translate3d(-17849.8867%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-ea9a5def-3b3b-41f3-a27d-804566f3fc6b [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-21.874999829338588%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] A equipe analisou 155 acasalamentos em um ambiente de laboratório. Em 152 dos casos, as aranhas machos foram capazes de saltar em segurança. As três aranhas que não o fizeram foram comidas por suas parceiras Shichang Zhang/Universidade de Hubei

Não se sabe por que as fêmeas de Philoponella prominens tentam comer os machos após o acasalamento, mas pode ser um teste de seleção sexual para avaliar se eles são parceiros reprodutivos dignos

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Ao contrário dos mamíferos, a aranha fêmea tem um saco em seu trato reprodutivo chamado espermateca, que contém o esperma e o impede de encontrar o óvulo

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[{"selector":"#anim-6d39f625-0c5a-430c-9664-30cb60db355b","keyframes":{"opacity":[0,1]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-3ea48c7d-7292-477f-b7ad-de2f42e9bf8b","keyframes":{"transform":["translate3d(99.18478%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-d5aeb2c6-b88d-497b-88af-cb6d1c9f2df9 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-35.1562498293386%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] “As fêmeas podem aceitar os espermatozóides do macho que consegue fugir, enquanto descartam os espermatozóides do macho que pode ser facilmente capturado por ela”, disse o o autor do estudo, Shichang Zhang Pexels/Sandhy Prasetyo

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