Chemical immobilization of free-living capybaras (Hydrochoerus hydrochaeris) using ketamine-dexmedetomidine combination and a remote drug delivery system

Rosenfield, Derek Andrew; Ferraro, Mario Antonio; Igayara, Claudia; Cortopassi, Silvia Renata Gaigo; Pizzutto, Cristiane Schilbach

doi:10.29374/2527-2179.bjvm107220

Cited by 3 publications

(3 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of the greatest discrepancies found in the literature is reported body weight, which we believe is due to the use of the same information of original reports, as well as the significant differences in weight between capybaras in their natural biomes versus synanthropic animals. An average reported body weight for adult capybara's in the wild is between 40-50 kg (Moreira et al, 2013), whereas some members in agricultural and urban areas were reported with up to 105 kg (Rosenfield et al, 2020), < 100% weight variation. Thus, we suggest considering a differentiation between H. hydrochaeris silvestris to H. hydrochaeris synanthrope, due to the fact of substantial weight variation, in some case > 100%.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Gross Osteology and digital radiography of the common Capybara (Hydrochoerus hydrochaeris), Carl Linnaeus, 1766 for scientific and clinical application

Rosenfield

Paretsis

Yanai

et al. 2020

Braz. J. Vet. Res. Anim. Sci.

View full text Add to dashboard Cite

Being able to study anatomical structures of wildlife species for science and clinical practice is of great importance. We aimed to describe the normal gross osteology of the common adult capybara Hydrochoerus hydrochaeris (Linnaeus, 1766), using macerated bone specimens and high-resolution digital radiography. The complete axial and appendicular skeleton was further compared with previously reported anatomical findings. For this purpose, we used three adult capybara cadavers (two females and one male), with a mean bodyweight of ±50 kg. Some H. hydrochaeris-specific morphological characteristics, especially in the skull region, show evidence of adaptation to aquatic life, such as an elongated head shape, with eyes, ears, and nose, located dorsally, to stay above water. Additionally, the entire bone structure demonstrates the size and weight support of the largest rodent and its adaptation with respect to foraging and locomotion behaviors. As a semi-aquatic herbivore, classified as cursorial (having limbs adapted for running), the authors believe it should be reclassified as cursorial-swimming/diving. Moreover, we argue to consider a differentiation between H. hydrochaeris silvestris to H. hydrochaeris synanthrope, due to substantial weight variation, in some cases > 100%. This inevitably has an impact on the development of bone structure, thus influencing habitual adaptation, and consequently, its clinical implications and animal handling. Radiography exams helped in the identification of bone structures, which otherwise were not observed in anatomical specimens, such as ossa sesamoidea, including the ossicle lunulae. Likewise, the radiographs were particularly helpful in overall better comprehension of the intubation and catheterization procedures. We believe this work can contribute as a reference to anatomical studies for students and professionals acting in clinic, surgery, and research.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Collecting semen through catheterization, as described in detail at the works by Araujo et al (2020) and Rosenfield et al (2020), has become a method of interest, and demanded further training.…”

Section: Discussionmentioning

confidence: 99%

Gross Osteology and digital radiography of the common Capybara (Hydrochoerus hydrochaeris), Carl Linnaeus, 1766 for scientific and clinical application

Rosenfield

Paretsis

Yanai

et al. 2020

Braz. J. Vet. Res. Anim. Sci.

View full text Add to dashboard Cite

show abstract

“…Even if the dart bounces off afterwards, it will still deliver the drug successfully [28]. In contrast, a conventional syringe dart requires > 2 cm of penetration for successful delivery [29,30]. As an added practical benefit, microneedle-equipped darts with 3D-printed polymer-encapsulated drugs are smaller and lighter-and can be stored longer-than conventional syringe darts.…”

Section: Microneedle Deliverymentioning

confidence: 99%

Evaluating a Controlled Electromagnetic Launcher for Safe Remote Drug Delivery

LaRocco,

Tahmina,

Simonis

2024

Technologies

View full text Add to dashboard Cite

Biologists and veterinarians rely on dart projectors to inject animals with drugs, take biopsies from specimens, or inject tracking chips. Firearms, air guns, and other launchers are limited in their ability to precisely control the kinetic energy of a projectile, which can injure the animal if too high. In order to improve the safety of remote drug delivery, a lidar-modulated electromagnetic launcher and a soft drug delivery dart were prototyped. A single-stage revolver coilgun and soft dart were designed and tested at distances up to 8 m. With a coil efficiency of 2.25%, the launcher could consistently deliver a projectile at a controlled kinetic energy of 1.00 ± 0.006 J and an uncontrolled kinetic energy of 2.66 ± 0.076 J. Although modifications to charging time, sensors, and electronics could improve performance, our launcher performed at the required level at the necessary distances. The precision achieved with commercial components enables many other applications, from law enforcement to manufacturing.

show abstract

Exploration of double-dart injection technique as a supplemental application for remote drug delivery system for zoo and wild animals

et al. 2022

View full text Add to dashboard Cite

Background and Aim: Remote drug delivery has become an essential tool for safely delivering medication and vaccines to free-ranging, non-domestic, or dangerous animals. All dart guns currently use a single dart per injection, and it might occasionally be not practical with large animals. Shooting the dart more than once on an animal may cause flight, injury, stress, and ultimately unsuccessful delivery. Furthermore, purchasing many dart guns and hiring and training more staff may be unfeasible in developing countries. Therefore, employing the double-dart injection technique may help reduce the cost of operation, save time for capturing animals, minimize stress and injury, and improve animal welfare. The objectives of this study were to test the possibility of using the double-dart injection technique and optimizing the guidelines for this procedure. Materials and Methods: A standard brand-calibrated darting rifle was used to deliver the darts to the target board constructed from paper, polypropylene, and ethylene-vinyl acetate foam. The shot stage and shooter were fixed, and the shooting range was 5-20 m. The pressure of the gun was varied according to a company's recommendation. The single dart (control dart) was first shot to the target point, and then the double darts were shot 3 times for each condition. The experiment was done in the field with no wind. The inclusion criteria were that two darts must hit the target and not penetrate the target board deeply. The distances between the control dart and double darts (first and second darts) and between each dart of the double darts were measured, and the standard curve graphs and formulas were created. Results: The results showed that the distance between the control dart and the double darts was shortened as the pressure was increased. All double-dart injections hit the target below the control dart. We were able to create many formulas to predict the optimal gun pressure and aim point for double-dart injection in each shot range. It usually requires more pressure settings than a single-dart injection, particularly the long shot range. It also needs to aim the target point above the original point. Conclusion: Double-dart injection technique can be used efficiently in 5-20 m distance, and it usually requires increasing the pressure from the company's recommendation and adjusting the injecting point.

show abstract

Chemical immobilization of free-living capybaras (Hydrochoerus hydrochaeris) using ketamine-dexmedetomidine combination and a remote drug delivery system

Cited by 3 publications

References 23 publications

Gross Osteology and digital radiography of the common Capybara (Hydrochoerus hydrochaeris), Carl Linnaeus, 1766 for scientific and clinical application

Gross Osteology and digital radiography of the common Capybara (Hydrochoerus hydrochaeris), Carl Linnaeus, 1766 for scientific and clinical application

Evaluating a Controlled Electromagnetic Launcher for Safe Remote Drug Delivery

Exploration of double-dart injection technique as a supplemental application for remote drug delivery system for zoo and wild animals

Contact Info

Product

Resources

About