George Robert H, Buckner Chris, Baine Katherine, Steeil James, White Stacia, Handsel Tim, Wyffels Jennifer T
Ripley's Aquarium of Myrtle Beach, Myrtle Beach, SC, United States.
Ripley's Aquarium of the Smokies, Gatlinburg, TN, United States.
Front Vet Sci. 2024 Jul 22;11:1410421. doi: 10.3389/fvets.2024.1410421. eCollection 2024.
Southern stingrays () are relatively large rays that are common and popular in public aquariums because of their size and gentle nature. In aquariums, as well as in the wild, female southern stingrays are fecund. They have a short gestation cycle and can sustain multiple pregnancies each year, each culminating with 2-10 young. This reproductive rate could quickly outpace capacity in managed care and result in a ray surplus. To prevent overpopulation, many aquaria have resorted to single sex groups with a preference for female-only populations. This is an effective way to control population growth, but forces the maintenance of two separated populations of rays; for females this interrupts normal reproductive cycling and replaces it with a protracted non-pregnant condition. An additional consideration is development of reproductive disease in females which is recognized by an enlarged, misshapen, and congested ovary with an abundance of cystic structures and an enlarged uterus with a thickened wall that is often filled with histotroph despite a non-pregnant status. There are no effective long-lasting medical treatments for this type of reproductive disease and mortality is often the result. This report describes a surgical technique for ovariectomy in southern stingrays including outcomes and complications. Ovariectomy as a surgical method prevents unwanted reproduction and has the benefit of reducing reproductive pathologies commonly observed in southern stingrays as they age. Seven stingrays 1-5.2 years old and 42-83.5 cm disc width underwent ovariectomy. After anesthesia, the ovary and a small amount of epigonal was excised via a left para-lumbar incision. Four of the seven rays survived five or more years post-procedure. Two rays died acutely of coelomitis and one ray died of complications unrelated to the procedure. This report details a surgical procedure for ovariectomy in southern stingrays including outcomes, complications, and recommendations.
南方黄貂鱼体型相对较大，因其体型和温顺的性格，在公共水族馆中很常见且受欢迎。在水族馆以及野外，雌性南方黄貂鱼繁殖力强。它们的妊娠期短，每年能维持多次怀孕，每次怀孕最终会产下2至10只幼崽。这种繁殖率可能很快超过人工饲养的承载能力，导致黄貂鱼数量过剩。为防止数量过多，许多水族馆采用单性别群体，更倾向于只饲养雌性群体。这是控制种群增长的有效方法，但需要维持两个分开的黄貂鱼种群；对于雌性来说，这会中断正常的生殖周期，取而代之的是长期的非怀孕状态。另一个需要考虑的问题是雌性生殖疾病的发展，其表现为卵巢肿大、畸形和充血，有大量囊性结构，子宫增大，壁增厚，尽管未怀孕但通常充满组织营养物。对于这种类型的生殖疾病，没有有效的长期药物治疗方法，死亡率往往很高。本报告描述了南方黄貂鱼卵巢切除术的手术技术，包括结果和并发症。卵巢切除术作为一种手术方法可防止不必要的繁殖，并有助于减少南方黄貂鱼随着年龄增长常见的生殖病理。七只年龄在1至5.2岁、盘宽42至83.5厘米的黄貂鱼接受了卵巢切除术。麻醉后，通过左腰部旁切口切除卵巢和少量生殖腺。七只黄貂鱼中有四只在手术后存活了五年或更长时间。两只黄貂鱼因体腔炎急性死亡，一只黄貂鱼死于与手术无关的并发症。本报告详细介绍了南方黄貂鱼卵巢切除术的手术过程，包括结果、并发症和建议。
