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Date: 05/12/25
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Our Goals

  1. Acquire and make easily accessible to zoo and aquarium professionals the current body of knowledge on animal welfare and ethics.
  2. Conduct and facilitate welfare assessments and applied welfare research on captive exotic animals.
  3. Convene important discussions and presentations on captive exotic animal welfare and ethics.
  4. Train professionals on captive exotic animal welfare best practices and policies.
  5. Recognize advances in improving captive exotic animal welfare and ethics through awards.
URL: https://detroitzoo.org/resources/?fwp_search=tryptophan

Environmental enrichment techniques and tryptophan supplementation used to improve the quality of life and animal welfare of Nile tilapia

Authors: João Favero Neto, Percilia Cardoso Giaquinto

Publication/Journal: Aquaculture Reports

Keywords: aggressive behavior, animal behavior, oreochromis niloticus, preference, stereotypes

2020

Associations among within-litter differences in early mothering received and later emotional behaviors, mothering, and cortical tryptophan hydroxylase-2 expression in female laboratory rats

Authors: Christina M. Ragan, Kaitlyn M. Harding, Joseph S. Lonstein

Publication/Journal: Hormones and Behavior

Keywords: anxiety, maternal behavior, neophobia, tryptophan hydroxylase-2, within-litter

2016

Experimental Verification of the Effects on Normal Domestic Cats by Feeding Prescription Diet for Decreasing Stress

Authors: Kazuki Miyaji, Maki Kato, Nobuyo Ohtani, Mitsuaki Ohta

Publication/Journal: Journal of Applied Animal Welfare Science

Keywords: alpha-casozepine, cats, cortisol, stress, tryptophan

2015

Minimizing aggression during mixing of gestating sows with supplementation of a tryptophan-enriched diet

Authors: Rosangela Poletto, Fabiana C. Kretzer, Maria J. Hötzel

Publication/Journal: Physiology & Behavior

Keywords: aggression, animal welfare, gestation, social mixing, swine, tryptophan

2014

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Detroit Zoological Society: Detroit Zoo; Belle Isle Nature Center

Celebrating and Saving Wildlife and Wild Places

8450 W. 10 Mile Road, Royal Oak, MI 48067 | 248-541-5717

The Detroit Zoological Society – a renowned leader in
humane education, wildlife conservation, animal welfare
and sustainability – operates the Detroit Zoo and Belle Isle Nature Center.

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Celebrating and Saving Wildlife and Wild Places
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