Behaviour Archives - The Sciku Project

November 22, 2024November 22, 2024

Down Dog by James Penha

I knew my dog sensed
my anxiety he scents—
and empathizes!
by James Penha

A new study shows that not only do dogs smell human stress, they are themselves depressed as a result.

Further reading:

‘The odour of an unfamiliar stressed or relaxed person affects dogs’ responses to a cognitive bias test’, 2024, Parr-Cortes, Z., Müller, C.T., Talas, L., Mendl, M., Guest, C., & Rooney, N.J., Scientific Reports. Available: https://doi.org/10.1038/s41598-024-66147-1

‘Dogs can smell human stress and it bums them out, study shows’, 2024, Page, S., The Washington Post. Available: https://www.washingtonpost.com/lifestyle/2024/08/08/dogs-smell-human-stress-study/

Author bio:

Expat New Yorker James Penha (he/him 🌈) has lived for the past three decades in Indonesia. Nominated for Pushcart Prizes in fiction and poetry, his work is widely published in journals and anthologies. His newest chapbook of poems, American Daguerreotypes, is available for Kindle. Penha edits TheNewVerse.News, an online journal of current-events poetry. You can find out more about James’ poetry on his website https://jamespenha.com and catch up with him on Twitter @JamesPenha

Enjoyed James’ sciku? Check out more of his sciku here: ‘Quantumku’, ‘DNAncient’ and ‘If a Tree Talks in a Forest’, ‘Air-Gen-Ku ‘, and ‘Boys Whale Be Boys’.

May 16, 2024November 22, 2024

Boys Whale Be Boys by James Penha

humpbacks copulate
in photos for the first time—
out of the closet
by James Penha

The world’s first photographs of humpback whales copulating are even more groundbreaking because both individuals were male.

Further reading:

‘An observation of sexual behavior between two male humpback whales’, 2024, Stack, S.H., Krannichfeld, L. & Romano, B., Marine Mammal Science. Available: https://doi.org/10.1111/mms.13119

‘Humpback Whale Sex Observed for the First Time Ever, between Two Males’, 2024, Hobson, M., Scientific American. Available: https://www.scientificamerican.com/article/humpback-whale-sex-observed-for-the-first-time-ever-between-two-males/

Author bio:

Enjoyed James’ sciku? Check out more of his sciku here: ‘Quantumku’, ‘DNAncient’ and ‘If a Tree Talks in a Forest’, ‘Air-Gen-Ku ‘, and ‘Down Dog’.

June 8, 2023November 12, 2024

Sentient Sea Play by Douglas J. Lanzo

sentient sea play
upside-down tentacles swirl
through schools of minnows
by Douglas J. Lanzo

Watching a common octopus in the movie ‘My Octopus Teacher’ harmlessly herd tide-surged minnows into a school and repeatedly maneuver its tentacles through it, harmlessly playing with it, I was astounded by its high level of intelligence. Despite interacting with the helpless minnows for an extended period of time, the recreational creature did not eat or catch a single minnow.

Further reading:

For additional information, besides watching the movie ‘My Octopus Teacher’, please take a look at a fascinating article on adaptive behavior in the March-April Issue of Harvard Magazine entitled ‘Inner Senses’ and a recent Harvard Law School article entitled ‘All Creatures Great and Small’ that chronicles the exploratory behavior and ability of octopi to individually recognize humans.

Author bio:
Doug is an international author whose Newbery-nominated novel, The Year of the Bear, won the 2023 Ames Award for Young Adult literature, was a finalist for the 2023 Hawthorne Prize and is a 2022 Firebird Award Winner. He has published 337 poems in 70 literary publications in 10 countries. He and his twin son poets enjoy nature, fishing, tennis, hiking and snorkeling. His Author’s website is at www.douglaslanzo.com .

Check out other sciku by Doug here: ‘Ornamental Defense‘, ‘Signaled Synchrony’, and ‘Undersea Fireworks’.

May 24, 2023November 12, 2024

Ornamental Defense by Douglas J. Lanzo

Christmas ornaments
pursued seabed octopus
adorns legs with shells
by Douglas J. Lanzo

I was inspired to write this Sciku by watching the movie ‘My Octopus Teacher’ and observing a highly intelligent Common Octopus evade a Pyjama shark predator in a kelp forest in False Bay, South Africa by covering its arms with seafloor seashells.

Its amazingly high level of intelligence was reflected in its recognition of the free diver who dove to its lairs in the kelp forest on a daily basis to interact with it, its playing with fish with its tentacles in the tide, its cloaking itself with strands of kelp to temporarily escape from a Pyjama shark, its dashing onto a sand beach to escape the jaws of the menacing shark and its riding atop the startled shark and slipping off its back to complete its getaway.

Further reading:

Please check out ‘My Octopus Teacher’ for more information about the intelligence and remarkable sentience and adaptive behaviors of octopi as well as the recent article ‘Inner Senses’ by Jonathan Shaw in Harvard Magazine for information about its adaptive behavior at https://www.harvardmagazine.com/2023/03/feature-nicholas-bellono-animal-adaptations

Check out other sciku by Doug here: ‘Sentient Sea Play’, ‘Signaled Synchrony’, and ‘Undersea Fireworks’.

December 16, 2022January 13, 2023

Civil Disobedience by Jerome Berglund

honeyed words profess
or letter wrapped around brick
different windows
By Jerome Berglund

From Minneapolis – where belligerent citizens have nearly achieved meaningful abolition of their existing law enforcement institutions, are presently excitingly experimenting with innovative alternate approaches to policing not rooted in ‘slave patrols’, and utilizing social workers who do not view citizens as enemy combatants rather than goons trained to react violently – one distinctly appreciates the power and potency of responsible, cautious exertion of civil disobedience in achieving critical goals.

Just as salty suffragettes employed outside the box solutions to win their votes, one wonders what sort of inspired disruptions, boycotts and protests will become obliged to convince venal, bought politicians who ‘vote with their wallets’ to finally act in their species’ interest to seriously address the devastating industrial destruction well on its way to making the planet uninhabitable, already having wiped out 70% of existing animal populations in the span of half a century.

Further reading: Conservative republicans highly skeptical of climate scientists

Author bio:

Jerome Berglund, recently nominated for the 2022 Touchstone awards, graduated from USC’s film program, worked in the entertainment industry before returning to the midwest where he has been employed as everything from dishwasher to paralegal, night watchman to assembler of heart valves. Jerome has exhibited many haiku, senryu and haiga online and in print, most recently in the Asahi Shimbun, Bear Creek Haiku, Bamboo Hut, Cold Moon Journal, Daily Haiga, Failed Haiku, Haiku Dialogue, Scarlet Dragonfly, Under the Basho, and the Zen Space. You can follow him on Twitter @BerglundJerome and find more of his poetry here: https://flowersunmedia.wixsite.com/jbphotography/post/haiku-senryu-and-haiga-publications

Check out more sciku from Jerome here: ‘Environmental Charlie Browns’, ‘Illusion’, ‘Vested Interests‘ and ‘Exploitation in Micro and Macro’.

June 25, 2021January 28, 2022

The Core Correlate of COVID-19 Vaccine Acceptance by Dr Michael J. Leach

vaccine acceptance
correlates with a belief
in the greater good
by Dr Michael J. Leach

During 2020 and 2021, acceptance of coronavirus disease-19 (COVID-19) vaccines has been among the most topical areas of health science research. As COVID-19 vaccine availability continues to rise worldwide in a global effort to combat the ongoing coronavirus pandemic, more and more people are faced with the question of whether or not to get vaccinated. Even when an approved COVID-19 vaccine is readily available to a particular subgroup of the global population, a high level of vaccine uptake cannot be guaranteed. For one reason or another, individuals within the population may be hesitant to roll up their sleeves to receive the COVID-19 vaccine.

In a UK population-based study, Freeman et al. (2021) investigated factors related to vaccine hesitancy through an online survey completed by 5,114 adults over September-October 2020. The research team measured vaccine hesitancy within the study population using a specially developed tool—the Oxford COVID-19 vaccine hesitancy scale. While 71.7% of surveyed adults expressed willingness to accept the COVID-19 vaccine, 16.6% were very unsure about vaccination and 11.7% showed strong vaccine hesitancy.

Among the various beliefs, views, attitudes, and past experiences considered by the researchers in their analysis, the factor most strongly correlated with vaccine hesitancy was whether or not individuals believed in the collective importance of COVID-19 vaccination. An individual’s belief in the collective importance of COVID-19 vaccination is defined as the recognition that getting vaccinated protects the community and saves lives. This belief is consistent with the critically important field of public health and with the idea of doing something—in this case, getting vaccinated—for ‘the greater good’.

Based on the results of their study, Freeman et al. suggest that public health messages highlighting the societal benefits of vaccination could be broadcast in an effort to increase belief in the collective importance of COVID-19 vaccination and, thus, improve vaccine acceptance and uptake.

The original research article described here is available open access online:
Freeman D et al. (2021). COVID-19 vaccine hesitancy in the UK: the Oxford coronavirus explanations, attitudes, and narratives survey (Oceans) II. Psychological Medicine 1–15. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7804077/pdf/S0033291720005188a.pdf

Michael J. Leach (@m_jleach) is an Australian epidemiologist, biostatistician, and poet based at the Monash University School of Rural Health. His debut poetry collection is Chronicity (Melbourne Poets Union, 2020).

Check out more sciku by Michael, including ‘Drug-Induced Hip Fractures‘, ‘The Psychopharmacological Revolution‘, ‘Quality of Life at Seven Years Post-Stroke‘, ‘The Early Impacts of COVID-19 on Australian General Practice‘, ‘The Burden of Bushfire Smoke‘, and ‘Australian Science Poetry‘ with science communicator Rachel Rayner. Michael also has another Covid-19-related sciku published in Pulse which is well worth checking out: ‘flu shot announcement‘.

May 20, 2021May 20, 2021

Xenopus Enrichment

Smooth frogs and fake plants
embracing in the water.
Happiness is here.

The African Clawed Frog, Xenopus laevis, is a common laboratory model species of amphibian, used in research primarily for their embryos and eggs. Yet despite their popularity little attention has been given to the housing and husbandry – what is the best way to keep the African Clawed Frog?

Recently, however, things have begun to change as more attention is being given to the welfare of ‘lower’ vertebrates and invertebrates. Indeed, in 2016 we published research demonstrating that a darker tank background resulted in lower levels of corticosterone (a stress hormone), lower instances of stereotypical behaviour and less change in body mass (Holmes et al, 2016). The results suggest that darker backgrounds are better for African Clawed frog welfare in captivity (check out the sciku ‘Clawed frogs indicate‘ for more information about the study and the likely reasons behind the preference).

Now in 2021 new research has been published by Ramos and Ortiz-Díez that examines X. laevis preferences for types of physical enrichment within their tanks. The researchers provided tanks of frogs with artificial plants and opaque PVC tunnels and checked on the frogs three times a day for 6 weeks to see where in the tanks they were spending their time – with the plants, tunnels or in the open areas of the tanks. The results indicate that the frogs preferred the plants 40% more than the tunnels, although both were preferred over the areas of open space in the tank.

As research into the welfare of amphibians gains momentum it’s good to see more work focussing on this common laboratory animal and how it’s kept in captivity. Particularly warming is that in the experimental methods the researchers specifically state that tanks with dark sides and bases were used to reduce visual stress, referencing our earlier work.

Original research: https://doi.org/10.1177%2F00236772211011290

A note about the sciku: The phrase ‘smooth frogs’ that starts the poem is a reference to the meaning of the name laevis – smooth (the word Xenopus means ‘strange foot’).

Interested in African clawed frogs? Check out these other Xenopus sciku: ‘Clawed frogs indicate‘, ‘Have frog, will travel‘, ‘Fungal culprit‘ and ‘Reservoir or predator‘.

May 7, 2021May 7, 2021

Violent Aftershocks

Gender violence.
The ripples of disaster,
exacerbating.

Natural disasters and hazards are increasing in frequency, severity and duration worldwide, with evidence suggesting that the cause is anthropogenic climate change. Whilst this means we need improved and increased disaster management policies and practices for the immediate impacts of disasters (e.g. the collapse of a building during an earthquake), it is just as important to understand the wider implications natural disasters.

Women and girls are disproportionately impacted by natural disasters and hazards, including having higher mortality rates. The causes of this discrepancy include “discriminatory practices in relief efforts, lower access to information and resources, care responsibilities and gendered poverty”, with women’s perspectives in disaster management “not adequately considered and met”.

Yet new research by Thurston et al. (2021) also suggests that violence against women and girls also increases following natural disasters. Reviewing 37 previous studies the team found positive associations between disaster exposure and increased gender-based violence, with 12 of the 20 quantitative studies showing a positive association and all 17 of the qualitative and mixed methods studies describing post-disaster violence against women and girls.

The researchers suggest three reasons behind this increase, with natural disasters and hazards:

Increasing stressors that trigger gendered violence (e.g. trauma, mental health issues, financial insecurities).
Increasing enabling environments (e.g. the absence of police, health and support services, a breakdown of family structure, social isolation).
Exacerbating the underlying drivers of violence against women and girls (e.g. gender and social inequalities, lack of female representation and inclusion).

Whilst the researchers acknowledge their work has some limitations (due to the limitations of the studies they examined), their findings make it clear that disaster risk-reduction policies must be gender sensitive and women need to be included in all aspects of disaster management, from policy to practice.

Original research: http://dx.doi.org/10.1136/bmjgh-2020-004377

March 25, 2021March 25, 2021

The Masterplan by Dr Lisa Holmes

Zoo science prevails
Conservation cannot wait
“Prevent extinction”
By Lisa Holmes

Celebrating its 90th year, Chester Zoo is one of the world’s leading zoo’s, housing more than 500 species and dedicated to their mission of “Preventing extinction”.

This week marks the release of their new 10 year Conservation Masterplan; a bold vision with the aim to tackle the global extinction crisis using six key targets:

Preserve options for future conservation for an additional 150 species through conservation breeding and propagation.
Halt or reverse the decline of 200 highly threatened populations of plants and animal species in the wild.
Improve landscapes for wildlife totalling 250,000 hectares.
Train 5,000 conservationists to deliver positive change for wildlife.
Empower 10 million people to live more sustainably.
Influence change in five major policy areas for wildlife.

Chester Zoo has an integrated approach to conservation using the skills and expertise of their staff, conservation partners, students, academics and supporters.

Dr Lisa Holmes is the Lead Conservation Scientist for Behaviour and Welfare at the zoo. She works closely with the animal curators and teams to provide an evidence-base for management decisions. With her team of staff and students, she conducts research to monitor the wellbeing of all species and is developing tailored welfare assessments for use within the zoo. She is also Vice-Chair of the Animal Welfare Working Group for the European Association of Zoos and Aquaria (EAZA).

Check out Lisa’s previous sciku ‘A Zoo Without Bars’.

You can read Chester Zoo’s Conservation Masterplan by clicking on the image below:

May 29, 2020May 29, 2020

Backlit Billboards in the Sea by Prof Teena Carroll

Sending messages,
luminescent Humboldt Squid
flicker in the deep.
by Teena Carroll

A group of scientists at the Monterey Bay Aquarium Research Institute conducted a study of Humboldt squid using remote operated vehicles. They wanted to determine how a group of squid could execute complex behaviors in low light deep sea conditions. For instance, the squid avoid body contact with each other even when pursuing the same prey.

Burford and Robison (2020) found that the squid used specific color patterns on their bodies primarily when they were hunting in groups. Normally, such color changes would not be visible in the deep sea; Humboldt squid are bioluminescent which researchers hypothesize essentially provides backlighting to highlight the color changes.

The complexity of the color changes prevented the researchers from translating exactly what the squid are communicating. However they were able to document that the patterns are a consistent and effective communication method. After observing repeated patterns, they think that the visual language of the squid may be evolved enough to use syntax.

Original research: https://doi.org/10.1073/pnas.1920875117

Additional information: https://www.mbari.org/humboldt-squid-signaling/

Teena Carroll is a mathematics professor at Emory & Henry College in Southwest Virginia and has been a poet longer than she has been a mathematician. @Teena Carroll

May 17, 2019May 17, 2019

Indigenous Engagement

The benefits of
indigenous engagement:
Ethics and Science.

Local knowledge and an awareness of local context can be integral to conducting a variety of research. However, one thing that’s less often considered is the impact of the diversity of the research team itself.

Conservation research by Ward-Fear et al (2019) into the impact of cane toads on yellow-spotted monitor lizards in Australia has unintentionally produced evidence of the scientific benefits of collaborating with local indigenous people.

Large cane toads are spreading through tropical Australia but are fatally toxic if eaten by yellow-spotted monitor lizards. Ward-Fear et al (2016) trained lizards with smaller, non-lethal cane toads and then compared the survival rates of trained and non-trained lizards in the wild over an 18 month period. They found that trained lizards had a greater survival rate than non-trained lizards, suggesting that the training helped the lizards to avoid eating the larger toxic cane toads.

Yet their study also revealed the importance of researcher diversity. In monitoring the population of lizards over 18 months, the research team included western scientists (professional, nonindigenous ecologists) and indigenous rangers (Australian-Aboriginal Traditional Owners of the region).

The indigenous rangers saw lizards from a greater distance, in more dense vegetation, under poorer light levels, and more frequently when the lizard was stationary. Additionally, when assessing the behavioural traits of the lizards, those that were spotted by the indigenous rangers were found to be more shy. What’s more, the ranger caught lizards appeared to benefit more from the training against the toxic cane toads.

All this highlights the importance of cultural diversity within research teams and in particular shows that indigenous collaboration can be utterly crucial for conservation efforts.

Original research:

Training of predatory lizards reduces their vulnerability to invasive toxic prey: https://doi.org/10.1098/rsbl.2015.0863

Collaboration with indigenous peoples can alter the outcomes of conservation research: http s://doi.org/10.1111/conl.12643

November 29, 2018November 29, 2018

Ensnared

Poor social spider.

Ensnared, building its own tomb.

Parasitoid wasp.

Parasitoid wasps are known to lay eggs on their victims which are then consumed by the hatching larvae. Some species will even paralyse their victim and place them in a nest to be eaten alive by their offspring. Yet behaviour observed by Fernandez-Fournier et al (2018) has revealed a wasp species that behaves even more disturbingly.

Adult Zatypota sp. wasps were found to target a species of social spider that lives in a colony web and rarely leaves it. The wasps lay their eggs on the abdomen of the spider and when the larvae hatches it attaches to the spider. The larvae influences the spider to then leave its colony and spin a cocoon web in which the spider then waits until the larvae finally kills it. Its meal consumed, the larvae then spins a pupal cocoon within the protection of the outer cocoon web and a few days later emerges as an adult.

The results reveal that the spider is manipulated into performing unusual behaviours, since such social spiders rarely leave their colony and the cocoon web is a complete different form of web. The infected spider makes its own tomb before being eaten alive within it.

Original research: http://dx.doi.org/10.1111/een.12698

November 7, 2018November 7, 2018

Domino effect

Domino effect.

Ocean-behaviour-hookworms

lead to seal pup deaths.

The web of life, food chains, ecological balance – there are a lot of terms that indicate how interlinked ecosystems are. A recent, tragic example of this is how a rise in ocean temperatures can indirectly result in increased seal pup death from hookworm infection.

Seguel et al (2018) found that sea temperatures influenced the survival of South American fur seal pups. Sea temperatures effect wind patterns and ocean currents, changing the abundance of nutrients and as a result fishes. Higher sea temperatures resulted in lower fish abundance, meaning that fur seal mothers needed to spend more time at sea feeding, consequentially spending less time with their pups. The reduced maternal care led to lower pup growth rates and a less effective immune system, making the fur seal pups more susceptible and less likely to successfully fight off hookworm infection.

Original research: http://dx.doi.org/10.7554/eLife.38432

July 17, 2018July 17, 2018

Eggy difference

The Baltic flounder:

Native to namesake region.

Eggy difference.

A new species of flounder has been identified as separate from the European flounder by Momigliano et al (2018). The Baltic flounder (Platichthys solemdali sp.) is native only to the Baltic Sea – the first fish species to be identified as endemic to the area.

Its reproductive behaviour differs from the European flounder, spawning eggs that sink in coastal areas as opposed to buoyant eggs in open water. There are also differences between the species in egg morphology, egg and sperm physiology. Unfortunately, the small morphological differences mean that it is difficult to unambiguously distinguish the species and genetic methods or egg/sperm analyses are required.

Original research: http://dx.doi.org/10.3389/fmars.2018.00225

May 17, 2018May 17, 2018

You aren’t one of us.

Help! Help! Predator!

Guys, why aren’t you helping me?

You aren’t one of us.

Jackdaws respond to anti-predator calls to join the caller in mobbing the predator and driving it away. Yet researchers have now found that who the caller is will affect the level of response.

In playback experiments Woods et al (2018) that the highest response was to nestbox residents who would be highly familiar with the caller. The level of response to an anti-predator call diminished as familiarity decreased from colony members to non-colony members and then to rooks (a species that often lives alongside jackdaws).

Original research: http://dx.doi.org/10.1038/s41598-018-25793-y

April 3, 2018April 27, 2018

How you handle mice

affects response to rewards.

Science improves too!

There is an increasing body of research to suggest that handling laboratory mice by the tail is both bad for their welfare and the science that the mice are studied for. Tail handling has negative impacts on mouse behaviour and physiology, with tunnel and cupping handling techniques resulting in behavioural improvements across various common behavioural bioassays, including the elevated plus maze, the open field test and the habituation-dishabituation paradigm.

Now new research suggests that handling is also important for reward-based behavioural assays. A study by Clarkson et al (2018) examined mouse response to sucrose solution (a common reward). They found that tail handled mice showed a reduced response to the sucrose than the tunnel handling method, a finding indicative of the tail handled mice having a ‘decreased responsiveness to reward and potentially a more depressive-like state’.

Across eight years and five research papers, from three distinct research groups in two countries, the field of laboratory mouse research has been irrevocably changed. Combined, the research suggests that tail handling results in poor animal welfare and potentially erroneous scientific results. The National Centre for the Replacement, Refinement & Reduction of Animals in Research now has extensive information on mouse handling techniques, example videos, tips and testimonials for researchers and animal carers to find out more about changing their current mouse handling methods to the tunnel or cupping techniques.

Original research: http://dx.doi.org/10.1038/s41598-018-20716-3

April 3, 2018April 30, 2018

Tunnels and cupping

beat tail handling mice for

behavioural tests.

Laboratory mouse handling method can affect mouse behaviour and physiology, and new research suggests that it can also impinge on mouse performance in behavioural tests. Research by Gouveia and Hurst (2017) found that tail handled mice performed poorly in a habituation-dishabituation paradigm test in comparison to cupped or tunnel handled mice. The tail handled mice ‘showed little willingness to explore and investigate test stimuli’ and even prior familiarisation with the test arena didn’t improve their performance much.

Combined with the previous research findings on mouse handling this research continues to expand on the long-reaching impacts of mouse handling technique on both mouse welfare and scientific experimental rigour and asks the question – just how valid are behavioural tests using laboratory mice that have been tail handled? Yet the story of mouse handling is not yet done, click here for the final instalment of this tale/tail!

Original research: http://dx.doi.org/10.1038/srep44999

April 3, 2018April 30, 2018

Cup handled mice

Cup handled mice show

improved glucose tolerance

and less anxiousness.

When performing scientific research with animals, it’s important to ensure that the procedures used do not themselves impact upon the results obtained. Laboratory mouse handling method has already been shown to impact upon mouse anxiety in common behavioural tests. However it seems that handling can have physiological impacts too.

Ghosal et al (2015) compared the behavioural and physiological responses of laboratory mice to either tail handling or cupped handling techniques. Cupped handled mice showed fewer anxious behaviours in a common behavioural test, reduced blood glucose levels and a lower stress-induced plasma corticosterone concentration in response to an overnight fast compared to tail handled mice. The researchers also found that obese laboratory mice handled using the cupped method demonstrated improved glucose tolerance.

Replication and repeatability are crucial components of science and this paper is a perfect demonstration of this – the researchers are from different research laboratories and in a different country to the mouse handling work that preceded it. In this way not only does it build on what came before, it also strengthens those earlier findings. Yet the mouse handling story is not finished yet, click here for the next chapter of this tale/tail!

Original research: https://doi.org/10.1016/j.physbeh.2015.06.021

April 3, 2018April 30, 2018

Reducing mouse anxiety

Further reducing

mouse anxiety using

familiar tunnels.

Building on the finding that handling laboratory mice using a tunnel resulted in lower anxiety than picking them up by the tail, Gouveia and Hurst (2013) next investigated whether familiarity with the tunnel might be an important factor. Once again they found that tunnel handling resulted in lower anxiety than tail handling during an elevated plus maze (a common behavioural test for laboratory mice).

This time they found differences between mouse strains, with C57BL/6 mice being most interactive towards tunnels from their home cage and ICR mice showing no difference in interaction between familiar home cage tunnels and novel tunnels previously used for handling mice from other cages. The researchers suggest that ‘as home cage tunnels can further improve response to handling in some mice, we recommend that mice are handled with a tunnel provided in their home cage where possible as a simple, practical method to minimise handling stress’. The tunnel would also act as a form of environmental enrichment for the home cage.

In science it’s rare to tell a complete story through the findings of two research papers, click here for the next chapter of this tale/tail!

Original research: https://doi.org/10.1371/journal.pone.0066401

April 3, 2018April 30, 2018

The little changes

can make a big difference:

Handle mice with care.

Traditionally laboratory mice are handled by picking them up by the tail, yet increasing evidence suggests that this is bad, both for the mice themselves and the quality of the science they are being used for. The evidence for this started building from Hurst and West’s 2010 study which demonstrated that handling by the tail resulted in increased aversion and anxiety.

The researchers proposed two alternative methods for handling laboratory mice: holding the mice cupped in the hands or using tunnels that the mice can crawl into and be transported by carrying the tunnels. These novel methods of handling led to the mice approaching the handler voluntarily, being more accepting of physical restraint and showing lower levels of anxiety.

In science it’s rare to tell a complete story through the findings of a single research paper, click here for the next chapter of this tale/tail!

Original research: http://dx.doi.org/10.1038/nmeth.1500

February 6, 2018February 6, 2018

On a knife edge

Life on a knife edge:

The metabolic demands

facing polar bears.

Polar bears rely on marine mammals such as seals which are high-fat prey. Despite the richness of their diet however, new research suggests that a reduction in the prey availability can have severe consequences on polar bear survival.

Pagano et al (2018) monitored nine free-ranging female polar bears over 2 years, measuring their metabolic rates, daily activity patterns, body condition and foraging success. They found that more than half of the bears had an energy deficit resulting from a high metabolic rate (1.6 times higher than previously assumed) and a low intake of the high-fat prey. As fragmentation of sea ice continues and seals become harder to catch the high metabolic requirements of polar bears is likely to become increasingly catastrophic for the species.

Original research: https://doi.org/10.1126/science.aan8677

January 23, 2018January 23, 2018

Beak trimming distaste

Beak trimming distaste,

yet long beaks lead to poor health.

Best of a bad bunch?

Sometimes it’s better to cause harm for the right reasons rather than allowing worse harm to occur. Egg-laying barn hens typically have their beaks trimmed to reduce pecking damage but this practice results in pain and sensory loss for the birds. As a result the practice of beak trimming is being debated worldwide and some countries have already banned it based on welfare concerns.

Riber and Hinrichsen (2017) compared the welfare of trimmed and non-trimmed flocks of hens across 10 separate farms and across 62 weeks. They found that beak trimming actually resulted in higher conditions of hen plumage, skin and keel bones, as well as decreased mortality. Whilst beak trimming seems distasteful, this evidence suggests that it may be the best option after all.

Original research: https://doi.org/10.3389/fvets.2017.00222

November 20, 2017November 20, 2017

Food or family?

Learning to distinguish kin

is hard with prey near.

The benefits of recognising your relatives are many and in cannibalistic species can include avoiding eating members of your own family. Learning kin cues frequently occurs early in life when a number of other cues need to also be learnt, including food cues.

Christiansen and Schausberger (2017) found that predatory mites raised with only their relatives were able to distinguish between related and unrelated larvae. This distinction was not made by mites reared in the presence of relatives and food cues.

The presence of food cues interfered with the learning of kin cues, yet the presence of kin cues did not disrupt the learning of food cues. This suggests that if food is present the mites will learn to identify it, however if there is no food and the mites may need to resort to cannibalism then they learn to avoid eating their own relatives.

Original research: https://doi.org/10.1016/j.anbehav.2017.09.005