Embryonic exposure of chicken chicks (Gallus gallus domesticus) leads to heightened sensitivities towards the exposed scent

In chickens, food consumption can be altered by exposing the chicks to scents as embryos. We exposed eggs to an orange-scented food additive in the final days of incubation. Following hatching, we tested these exposed chicks’ ability to detect this scent at a variety of concentrations. We found that orange-exposed chicks responded to an orange-scented solution at lower concentrations than control chicks. This sensitization may allow chicks to be more effective at locating acceptable food items but requires further testing to determine its significance. Orange-exposed and control chicks were also tested with the scent of raspberry. Orange-exposed chicks responded to the raspberry presentation significantly more than the control chicks did, suggesting that the embryonic exposure to orange may have influenced how the chicks responded towards another fruity smell. This result suggests that chicks may be learning general characteristics of exposed scents while in the egg, though this needs further research

Language Preference in a Bi-language Digital Library

This paper examines user choice of interface language in a bi-language digital library(English and Maori, the language of the indigenous people of New Zealand)/ the majority of collection documents are in Maori, and the interface is available in both Maori and English. Log analysis shows three categories of preference for interface language: primarily English, primarily Maori and bilingual(switching back and forth between the two)

Responses of king penguin Aptenodytes patagonicus adults and chicks to two food-related odours

Increasing evidence suggests that penguins are sensitive to dimethyl sulphide (DMS), a scented airborne compound that a variety of marine animals use to find productive areas of the ocean where prey is likely to be found. Here we present data showing that king penguins Aptenodytes patagonicus are also sensitive to DMS. We deployed DMS on a lake near a king penguin colony at Ratmanoff beach in the Kerguelen archipelago. We also presented DMS to ‘sleeping’ adults on the beach. On the lake, penguins responded to the DMS deployments by swimming more, while on the beach, penguins twitched their heads and woke up more for the DMS than for the control presentations. Interestingly, penguins did not respond to cod liver oil deployments on the lake; mirroring at-sea studies of other penguins. Although at-sea studies are needed to confirm that king penguins use DMS as a surface cue that informs them of productivity under the water, this study is an important first step in understanding how these birds locate prey over significant distances

Is the web being used to speak our language?

This paper presents results from extensive surveys of the usage of Maori language on the World Wide Web(www, Web) conducted in 1998 and 2002. Issues both supportive and detrimental relating to the use and publication of indigenous languages in the WWW will be highlighted. Specifically: how is the WWW being used to articulate the Maori language

Language switching in a digital library; does it make a difference if the default language is set to Maori?

In this paper we investigate the effect of default interface language on usage patterns of the Niupepa digital library (a collection of historic Māori language newspapers), by switching the default interface language between Māori and English in alternate weeks. Transaction analysis of the Niupepa collection logs indicates that changing default language affects the length of user sessions and the number of actions within sessions, and that the English language interface was used most frequently

Stress hormone in White-throated sparrows (Zonotrichia albicollis) is not influenced by the cleanliness of a cotton bag

Bird banding stations are used throughout North America to trap and band birds, which allow researchers and government agencies to monitor populations, migration routes, health and a variety of other elements of avian physiology and biology. Birds are commonly trapped in mistnets, placed into a cotton bag, and brought to a research station where they are banded, weighed, measured and released. On some days, the number of birds caught may be so high that birds are left to hang in the bags for 10 – 20 minutes while other birds are processed. During this time in the bag the birds are undergoing a stress response, with their stress hormone levels (corticosterone; CORT) steadily increasing as a result. Given all of the negative effects of chronic stress, such as suppressing reproduction, nest desertion and inhibiting growth, banding labs should endeavor to decrease the stress of captive birds whenever they can. One way that CORT levels may be altered is by manipulating the microenvironment of the cotton bag. To that end, we monitored the stress response of White-throated sparrows (Zonotrichia albicollis) held for thirty minutes in either clean unused cotton bags or in comparable bags that had previously held at least 8 various passerines. For a variety of metrics used to assess CORT, there were no significant differences between the two groups; though both groups increased their CORT over time. Thus, from a stress perspective, a banding lab need not be concerned with whether or not a holding bag is feces free or has been excessively used. The possibility of transmitting disease such as Salmonella via feces, however, should not be ignored

King Penguins Can Detect Two Odours Associated with Conspecifics

Recent studies on olfaction in penguins have focused on their use of odours while foraging. It has been proposed for some seabirds that an olfactory landscape shaped by odours coming from feeding areas exists. Islands and colonies, however, may also contribute to the olfactory landscape and may act as an orienting map. To test sensitivities to a colony scent we studied whether King penguins (Aptenodytes patagonicus) could detect the smell of sand, feathers or feces by holding presentations beneath their beaks while they naturally slept on the beach. Penguins had a significantly greater response to the feathers and feces presentations than to sand. Although only a first step in exploring a broader role of olfaction in this species, our results raise the possibility of olfaction being used by King penguins in three potential ways: (1) locating the colony from the water or the shore, (2) finding the rendezvous zone within the colony where a chick or partner may be found, or (3) recognizing individuals by scent, as in Humboldt penguins (Spheniscus demersus)

Delivering the Maori-language newspapers on the Internet

Although any collection of historical newspapers provides a particularly rich and valuable record of events and social and political commentary, the content tends to be difficult to access and extremely time-consuming to browse or search. The advent of digital libraries has meant that for electronically stored text, full-text searching is now a tool readily available for researchers, or indeed anyone wishing to have asscess to specific information in text. Text in this form can be readily distributed via CD-ROM or the Internet, with a significant impact on accessibility over traditional microfiche or hard-copy distribution. For the majority of text being generated de nouveau, availability in electronic form is standard, and hence the increasing use of full-text search facilities. However, for legacy text available only in printed form, the provision of these electronic search tools is dependent on the prior electronic capture of digital facsimile images of the printed text, followed by the conversion of these images to electronic text through the process of optical character recognition (OCR). This article describes a project undertaken at the University of Waikato over the period 1999 to 2001 to produce a full-text searchable version of the Niupepa or Maori- language newspaper collection for delivery over the Internet

The nose knows: How tri-trophic interactions and natural history shape bird foraging behavior

THE ECOLOGICAL QUESTION Do two species of ocean-foraging birds detect and respond to a chemical cue which is linked to their food source, and how might differences in their natural history help to explain any variation in sensitivity? ECOLOGICAL CONTENT Foraging, trophic cascades, chemical ecology, behavioral ecology, Antarctic food webs WHAT STUDENTS DO This dataset is designed for first-year biology students, but can be altered for upper-level students. After receiving sufficient background on the biology of King penguins, students must make hypotheses regarding the penguins’ sensitivity to an odor known to be associated with the primary productivity of the ocean. Students are given multiple data sets and need to analyze the data using a variety of statistical tests. Students work in pairs to examine and analyze the data, and then as a group generate conclusions to develop the larger picture. To give students a chance to apply their knowledge beyond penguins, a second dataset with other seabirds is introduced. Here students must contrast the results of seabirds to this odor against the responses of King penguins. For successful completion of the assignment, students must recognize how differences in the natural history between the two groups of birds might impact their sensitivities towards the odor. SKILLS Hypothesis creation, statistical analyses, graph creation, graph interpretation, phylogenetic tree interpretation, manipulating datasets and formulas in MSExcel, MSPowerpoint slide creation, synthesizing knowledge, drawing conclusions STUDENT-ACTIVE APPROACHES Guided inquiry, cooperative learning, jigsaw, critical thinking ASSESSABLE OUTCOMES Hypotheses creation, statistical results using MSExcel, figure creation using MSExcel, slides produced using MSPowerpoint, answers to questions SOURCE Bonadonna, F., S. Caro, P. Jouventin, and G.A. Nevitt. 2006. Evidence that blue petrel, Halobaena caerulea, fledglings can detect and orient to dimethyl sulfide. Journal of Experimental Biology 209:2165-2169. Cunningham, G.B., S. Leclaire, C. Toscani, and F. Bonadonna. 2017. Responses of king penguin Aptenodytes patagonicus adults and chicks to two food-related odours. Journal of Avian Biology 48:235-242

The Fox in the Henhouse: Responses of Chickens (Gallus domesticus) to the Scent of a Predator

Domestic chickens (Gallus domesticus) are often used as a model species in testing bird olfaction. Previous studies have indicated that domestic chicks can discriminate between various odors, are attracted to familiar odors, and use olfactory cues during food selection. Additionally, studies have indicated that olfaction plays an important role in predator recognition in a variety of songbirds. It has yet to be demonstrated, however, whether chickens can detect predators using olfactory cues. To address this, we tested 1-2 day old naïve chicks with undiluted fox urine and found that they were able to detect this scent. This could potentially signify that an innate fear response is present in domestic chicks and is initiated upon exposure to a predator’s scent. Furthermore, given the intensity with which chicks responded to the fox urine, we might have identified a useful odor to use in future chicken olfaction studies. To clarify how our testing method may have been affected by time of day, we also compared the responses of birds in the morning, afternoon, and evening and found there to be a significant difference in effectiveness of the test based on the time of day. Finally, results of a gustatory preference test between foods flavored with fish or flax oil will be discussed