Methods for reducing aggression

Daneault, Rachel

doi:10.1002/zoo.20430

Cited by 2 publications

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“…Testosterone's first androgenic effects take place during sexual differentiation in the developing fetus, during maturation of the male sex organs, during growth and puberty, and throughout adulthood to sustain spermatogenesis -plus, its bearing on the development and maintenance of secondary sexual characteristics, physical and behavioral (aggression). In fact, many studies investigate antifertility drugs to control intramale aggression, a dilemma in several captive-held species (PENFOLD et al, 2002;FERRIE et al, 2011;RACHEL, 2012). Unfortunately, one of the undesired consequences is the negative effects on male adornments, meaning the lion's mane; elk or deer antlers; bird's plumage; scent-marking glands, like the nasal Morillo of capybaras, and muscular appearance.…”

Section: Male Reproductive Physiology Under the Influence Of Contracementioning

confidence: 99%

Wildlife population control – reproductive physiology under the influence of contraceptive methods in mammalian wildlife, with emphasis on immunocontraception: the best choice? A literature review

Rosenfield

Pizzutto

2018

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

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Os conflitos Humanos-Animais Selvagens são uma realidade crescente e triste no mundo inteiro, tornando o controle populacional da fauna silvestre e animais ferais o maior desafio, principalmente diante do crescimento da população humana e, consequentemente, da diminuição dos habitats naturais dos animais. As atividades humanas e a destruição da natureza, forçam os animais de vida livre a se dirigirem para áreas urbanas e agrícolas, inevitavelmente, causando conflitos, como o risco de zoonoses, acidentes de trânsito, bem como danos às plantações, quando em busca de alimentos, cujo prejuízo chega a milhões de dólares. Durante décadas, a ciência esteve empenhada em esforços extensivos para desenvolver métodos de controle populacional “humano”; e muitas técnicas foram utilizadas, a fim de se realizar um controle populacional destes animais silvestres. Neste artigo será apresentada uma visão geral dos métodos anticoncepcionais aplicados, com demonstrações gráficas simplificadas de suas interações com a fisiologia reprodutiva, bem como relacionando os prós e os contras dos agentes antifertilidade empregados; também serão comparados com um conjunto de características desejadas para as aplicações em fauna a campo, com ênfase em imunocontracepção reversível, concluindo assim, com as razões do porque este conceito torna-se o mais apropriado e promissor para animais silvestres de vida livre.

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Section: Male Reproductive Physiology Under the Influence Of Contracementioning

confidence: 99%

Wildlife population control – reproductive physiology under the influence of contraceptive methods in mammalian wildlife, with emphasis on immunocontraception: the best choice? A literature review

Rosenfield

Pizzutto

2018

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

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“…Testosterone's first androgenic effects take place during sexual differentiation in the developing fetus; during maturation of the male sex organs, during growth and puberty, and throughout adulthood to sustain spermatogenesis; plus, it's bearing on the development and maintenance of secondary sexual characteristics, physical and behavioral (aggression). In fact, many studies investigate antifertility drugs to control intramale aggression, a dilemma in several captive-held species (Ferrie, Becker, Wheaton, Fontenot, & Bettinger, 2011;Penfold et al, 2002;Rachel, 2012).…”

Section: Contraceptivesmentioning

confidence: 99%

>b<Study on the perspective of population control of capybaras (>i<Hydrochoerus hydrochaeris>/i<) by reversible immunocontraceptive method>/b<

Rosenfield¹

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In Brazil, the invasion of urban areas by capybaras (Hydrochoerus hydrochaeris) represents a severe public health problem because of their epidemiological importance as an amplifying host for Rickettsia, the causative agent of the tick-spread disease Brazilian Spotted Fever. This is in addition to the human-capybara conflicts (traffic accidents, agricultural damage, etc.). Capybaras' resistance to adverse environmental conditions, high proliferative rates that are concurrent with reduction by natural predators, and laws against hunting mean that their population can quadruple in one year, consequently, increasing the beforementioned problems in anthropic areas. In this thesis, a population control model, based on immunocontraception, was used for the first time in H. hydrochaeris. The anti-GnRH vaccine (GonaCon), a single-dose recombinant, was administered intramuscularly, causing prolonged infertility in both sexes. To study the antifertility effects in this species, multidisciplinary studies were conducted; for a period of 36 months, 20 adult capybaras (10 males and 10 females); divided into two groups (control and treated) were investigated. Prior to the first intervention, animals were observed for reproductive behavior, fertility, and social group dynamics. Furthermore, positivereinforcement conditioning was used to facilitate physical and chemical restraint, minimizing capture-related stress. During the initial event, animals were health examined, ID marked, and biomaterials were collected, serving as a base-reference. Biomaterials were collected periodically (every 3-4 months), and investigations of contraceptive impacts on reproductive behavior and the group's integrity were carried out. Results showed: GonaCon-treated individuals ceased mating activity, with no direct births observed, confirmed by alterations to the reproductive physiology (spermatogenesis and folliculogenesis). Nevertheless, agonistic, courtship and alloparental behavior was preserved, maintaining the group's integrity. As a result, population growth was reduced, suggesting that immunization against GnRH is an effective long-term antifertility method in capybaras. Motivating critical discussions on non-lethal wildlife population control in Brazil, and the pressing issues on synanthropic species (capybaras), the study's intent was to provide an alternative strategy and, possibly, a national model to mitigate humanwildlife conflicts and zoonotic disease spread.

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Methods for reducing aggression

Cited by 2 publications

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Wildlife population control – reproductive physiology under the influence of contraceptive methods in mammalian wildlife, with emphasis on immunocontraception: the best choice? A literature review

Wildlife population control – reproductive physiology under the influence of contraceptive methods in mammalian wildlife, with emphasis on immunocontraception: the best choice? A literature review

>b<Study on the perspective of population control of capybaras (>i<Hydrochoerus hydrochaeris>/i<) by reversible immunocontraceptive method>/b<

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