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Jessica M. Kendall-Bar; Ritika Mukherji; Jordan Nichols; Catherine Lopez; Daniel A. Lozano; Julie K. Pitman; Rachel R. Holser; Roxanne S. Beltran; Matt Schalles; Cara L. Field; Shawn P. Johnson; Alexei L. Vyssotski; Daniel P. Costa; Terrie M. Williams
... Despite rapid advances in sensor development and technological miniaturization, it remains challenging to non-invasively record small-amplitude electrophysiological signals from an animal in its natural environment. Many advances in ecophysiology and biologging have arisen through sleep studies, which rely on detecting small signals over multiple days and minimal disruption of natural animal behav ...
... Aggressive interactions can lead to a social hierarchy and influence the responses of animal behavior and physiology. However, our understanding on the changes of fish behavior and physiology during the process of social hierarchical formation is limited. To explore the responses of fish behavior and physiology to social hierarchy, we examined the differences in the growth performance, aggression, ...
Arapaima gigas; Scleropages formosus; adults; aquaculture; basins; biosynthesis; brain; captive animals; gene expression; gene expression regulation; gene ontology; gonads; indigenous species; reproduction; research; sequence analysis; sexual development; sexual dimorphism; Brazil
Abstract:
... The Arapaima gigas is an endemic fish to the Amazon basin and with great potential for aquaculture, although its reproduction in captivity is limited by the absence of sexual dimorphism. The demand increase for pirarucu in the Northern region of Brazil, has led to new studies on the reproduction of the species. Thus, we aimed to investigate patterns of sex‐biased genes in brain and gonad tissues o ...
Luis Fernando Valenzuela-Moreno; Carlos Cedillo-Peláez; Claudia Patricia Rico-Torres; María Alejandra Hernández-Rodríguez; María del Carmen Carmona-Muciño; José Eduardo Farfán-Morales; Dolores Correa; Heriberto Caballero-Ortega
... The presence of Toxoplasma gondii in zoos is cause of alert because many susceptible species kept in captivity die of clinical toxoplasmosis. Moreover, excretion of T. gondii oocysts by infected captive wild felines into the facilities could pose a risk to workers. Herbivores in wild collections can serve as sentinels of local transmission, since they get infected by the consumption of oocysts pre ...
... Atlantic sturgeon (Acipenser oxyrinchus), also known as Baltic sturgeon, is considered extinct in German waters. Fish‐rearing for conservation purposes largely relies on classical hatchery technology focusing on traits like survival and growth in captivity but rarely focusing on subsequent life in the wild, lacking skills such as foraging or anti‐predation behavior. Predation is hence a major fact ...
Danio rerio; Solea senegalensis; Western blotting; brain; captive animals; gene expression; gene expression regulation; innervation; males; methylation; microRNA; neurons; progeny; protein synthesis; sperm quality; spermatogenesis; tyrosine 3-monooxygenase; viability; wild fish
Abstract:
... Senegalese sole (Solea senegalensis) is a species with a high commercial value that exhibits a reproductive dysfunction in males born and raised in captivity (F1) that hinders their sustainable culture. The present study evaluates the sperm quality and dopaminergic pathway of males born in the wild environment and of F1 males. Traditional sperm analyses were performed, finding only significant dif ...
... Orcas are large, deep-diving cetaceans who are known for their global distribution, wide-ranging behavior, intelligence, and social complexity. They possess one of the largest and most complex brains in the mammalian kingdom. However, they are the third most common species of cetaceans kept in aquariums and marine theme parks. Most spend many years, and sometimes decades, in captivity. At the time ...
... Control of reproduction is one of the key issues to extend tilapia aquaculture. In most fish species, reproduction is a rhythmic process which ensures that reproduction timing matches the most favorable environmental conditions to maximize the survival of offspring. Although the existence of daily spawning rhythms has been reported for a number of fish species, the daily rhythms in neuroendocrine ...
... The contamination of the environment with human pharmaceuticals is widespread and demand for such products is mounting globally. Wild vertebrates may be at particular risk from any effects from pharmaceuticals, because of the evolutionary conservation of drug targets. However, exposure of wildlife to pharmaceuticals is poorly characterised, partly due to challenges associated with detecting rapidl ...
... The short mackerel (Rastrelliger brachysoma) is one of the most economically important fish in Thailand; it is also a prime candidate for mariculture but unfortunately is plagued by reproductive problems that cause low production of gametes in captivity. An understanding of how the brain, pituitary, and gonad axis (BPG) from the neuroendocrine system are involved in the reproductive activity of wi ...
... Tool use, the manipulation of one object to change the state of another, is found in <1% of animal taxa and most often observed in captivity. Here, we report the observation of tentative tool use in a wild striped skunk (Mephitis mephitis), captured by a trail camera in the front yard of a hobby naturalist who shared the photographs on social media. The skunk is shown manipulating a rock in a mann ...
... All animals sleep and it is essential for maintaining optimal brain function. However, cetaceans engage in the unusual practice of unihemispherical sleep, where only half of their brain sleeps at a time, due to their constant need for movement and breathing. Most studies of sleep in cetaceans have occurred in captivity. However, tagging devices have now developed to the point where the data collec ...
... This study assessed differences in antioxidant (carotenoid, retinol, retinol-ester, vitamin E and coenzyme Q10) composition of egg yolk and tissue in chukar partridges (Alectoris chukar) newly hatched from eggs of birds maintained in captivity on commercial maize-soybean based diets and birds from the wild whose diet was obtained from the natural environment. All eggs were incubated in a commercia ...
... Amphibians are the most threatened vertebrate group with a third of currently known species endangered with extinction, as a result of climate change, habitat loss, disease-introduced exotic species, and pollution. Because of their vulnerability, they have often been used as environmental quality indicators, as well as laboratory models for toxicological research. Given the sensitivity of amphibia ...
Copepoda; Danio rerio; Isochrysis galbana; Lythrypnus; adults; brain; captive animals; early development; embryogenesis; fish larvae; larval development; microalgae; neuromasts; pigmentation; rearing; reproduction; sex reversal; sexual maturity; tanks
Abstract:
... The Bluebanded goby, Lythrypnus dalli, is a popular ornamental aquarium species and a key organism for the study of several fundamental biological questions, most notably reversible sex change in adults. To maximize the tractability of this species as an emerging model system, it is essential to have an optimized propagation system and a detailed developmental staging scheme. One limitation to the ...
DNA; Protozoa; Toxoplasma gondii; brain; captive animals; genes; human population; parasites; parasitoses; polymerase chain reaction; snakes; California
Abstract:
... Toxoplasma gondii, an obligate intracellular protozoan parasite, is responsible for one of the most common zoonotic parasitic diseases in almost all warm-blooded vertebrates worldwide, and it is estimated that about one-third of the world human population is chronically infected with this parasite. Little is known about the circulation of T. gondii in snakes and this study for the first time aimed ...
... Based on neuroanatomical indices such as brain size and encephalization quotient, orcas are among the most intelligent animals on Earth. They display a range of complex behaviors indicative of social intelligence, but these are difficult to study in the open ocean where protective laws may apply, or in captivity, where access is constrained for commercial and safety reasons. From 1979 to 1980, how ...
adults; arginine vasopressin; brain; captive animals; immunohistochemistry; males; mice; oxytocin; philopatry; secretion; social behavior; South Africa
Abstract:
... Oxytocin (OT) and arginine vasopressin (AVP) are produced in the brain. Due to their importance in modulating social behaviour, these two neuropepetides have been extensively studied in captivity, yet few data are available from the field. Here we report the findings from an immunohistochemistry study, where we measured density of OT and AVP in different brain nuclei of wild African striped mice ( ...
... Despite Meriones unguiculatus’ long history and popularity as an animal model in a wide range of research on topics from gastric and neurological diseases to animal cognition, there is no single comprehensive and detailed source of information about this animal’s behaviour in nature or captivity. Instead, partial and heterogeneous descriptions of several aspects of behaviour can be found throughou ...
... It is generally accepted that environmental enrichment enhances the performance and improves welfare of animals kept in captivity. Similar results have been obtained for fish. It has been previously reported that the presence of Blue or Red-Brown Substrate (BS and RBS respectively) on tank bottom resulted in growth enhancement and suppression of aggressive behavior of gilthead seabream Sparus aura ...
arginine vasopressin; brain; captive animals; corticosterone; family studies; males; mice; secretion; social cohesion; testosterone; vasopressin receptors
Abstract:
... In many species males display alternative reproductive tactics (ARTs). While males of different tactics differ behaviorally in the field, it is often not known whether these behavioral differences would also occur under standardized laboratory conditions, nor how ARTs are regulated by the brain. In the present study we kept male African striped mice (Rhabdomys pumilio) in captivity either in famil ...
... Gonadotropin-releasing hormone (GnRH) is a key neuroendocrine peptide involved in the reproduction of fish and other vertebrates. However, characterizing the involvement of GnRH in fish reproduction has been complicated by the discovery of multiple GnRH forms. In the present study, we isolated full-length cDNAs encoding three GnRH forms and analyzed seasonal changes in the concentrations of mRNA i ...
... In late summer 2006 considerable mortality in wild and captive Passeriformes and Strigiformes was observed in Zurich, Switzerland. All animals were found in a range of 2km². Observed clinical signs involved depression, ruffled plumage, incoordination, seizures and peracute death. Nutritional status was generally moderate to poor in wild birds, and variable in captive animals. Necropsy showed marke ...
... Observation of behaviour, especially social behaviour, and experimental studies of learning and brain function give us information about the complexity of concepts that animals have. In order to learn to obtain a resource or carry out an action, domestic animals may: relate stimuli such as human words to the reward, perform sequences of actions including navigation or detours, discriminate amongst ...
... Humans have evolved much longer lifespans than the great apes, which rarely exceed 50 years. Since 1800, lifespans have doubled again, largely due to improvements in environment, food, and medicine that minimized mortality at earlier ages. Infections cause most mortality in wild chimpanzees and in traditional forager-farmers with limited access to modern medicine. Although we know little of the di ...
... Gonadotropin-releasing hormone in Cyprinidae as in other Vertebrates functions as a brain signal which stimulates the secretion of luteinizing hormone from the pituitary gland. Two forms of gonadotropin-releasing hormone have been identified in cyprinids, chicken gonadotropin-releasing hormone II and salmon gonadotropin-releasing hormone. Hypohysiotropic functions are fulfilled mainly by salmon go ...
... Animals bred for captivity often have smaller brains and behave differently than their wild counterparts. These differences in brain size have been attributed to genetic changes resulting from, for example, inbreeding depression and pleiotropic effects of artificial selection for traits such as docility. A critical question, though, is whether these differences in brain size are due to plastic res ...
... Stable isotope analysis is an increasingly valuable tool in ecological studies and shows promise as a measure of nutritional stress in wild animals. Thus far, however, the only studies on endotherms that have conclusively shown changes in δ¹⁵N and δ¹³C values in response to nutritional stress were conducted on fasting animals and animals growing under extreme levels of food restriction. We conduct ...
Kenow, Kevin P.; Hoffman, David J.; Hines, Randy K.; Meyer, Michael W.; Bickham, John W.; Matson, Cole W.; Stebbins, Katie R.; Montagna, Paul; Elfessi, Abdulaziz
... European bat lyssavirus type 2 (EBLV-2) has been isolated once previously from a bat in the UK in June 1996. In September 2002, a Daubenton's bat (Myotis daubentonif) found in Lancashire developed abnormal behaviour, including unprovoked aggression, while it was in captivity. Brain samples from the bat were tested for virus of the Lyssavirus genus, which includes EBLV-2 (genotype 6), and classical ...