Sunday, 20 May 2018

Decoding the myth - an evidence-based alternative to culling cats


Below is something I hastily finished putting together this afternoon, in time for midnight in Australia. 

If anyone is interested, the Victorian Government is planning to class feral cats as pests, which would be catastrophic (pun SO intended) for innocent cats that roam on government land managed by the Department of Environment, Land, Water and Planning (DELWP) or Parks Victoria. 

This has largely been done under the radar with small token attempts at stakeholder engagement (because they are legally obliged to). The only reason cat rescues in Melbourne became aware was because of the diligence of our members. 

We have requested meetings with the elected members responsible for Labor's Animal Welfare Action Plan but have probably been dismissed as crazy cat people (which is true) but nonetheless we are unarguably Subject Matter Experts on the elusive, the beautiful, the incorrigible felis catus. And we often pick up the slack of local councils when it comes to animal control. 

So this awful proposal means that Departmental staff (and their extremely ominous "agents", most likely Shooters, Fishers and Farmers political party members) will be able to shoot cats. 

Am I correct in identifying the only feral ones in this situation? 


20 May 2018

Decoding the myth: an evidence-based alternative to culling cats

Dear Department of Environment, Land Water and Planning.

There comes a time in every policy-maker’s life where one is faced with the choice to embrace evidence-based decision making with short-lived populism. Good decisions are ones that are not only more effective in the long-term, but kinder to all Australians.
We understand that this is your purpose; it is ours, too.

This submission will illustrate why this will reflect negatively on the Andrew’s Government. We will also demonstrate the lack of evidence for the relationship between cat culling and improved outcomes for wildlife, and we will present better alternatives to you than the Feral Cats Declaration.

Summary points:

1.       This will be unpopular in the Victorian community
2.       Risk to stray and domesticated roaming cats
3.       This is an open contradiction to the Victorian Government’s Animal Welfare Plan
4.       A lack of evidence
5.       This proposal is unsuitable for Victoria’s open environmental system
6.       It is not possible to measure the success of this initiative, end-to-end
7.       A waste of resources
8.       Suggestions from the Cat Rescue Community

We suggest that research is done on cat and wildlife numbers in kill and no-kill areas - instead of being classed as a pest, wild cats are 'prohibited' from being in highly bio-diverse areas. We also strongly suggest the humane method of Trap-Neuter-Return (TNR) be introduced.
                             


 Notes on our submission:

*We have referenced Alley Cats Allies (https://www.alleycat.org/), a non-profit organisation. We acknowledge the bias that may exist in this organisation, however have used the academically-referenced parts of their material and believe this to be an excellent resource, even though it is secondary information.

*You will notice that we have tried to avoid the term ‘feral’ cat and for our purposes, we prefer to use the term ‘wild’ (cat who lives 3–5 kilometers from nearest human dwelling. Derives no benefit of food or shelter from humans), which is also useful is differentiating between stray cats (cat who derives some food or shelter from humans)



1. This will be unpopular in the Victorian community

In 2015, 23.6% of Australians 14+ reported owning at least one cat (Roy Morgan Research 2016). Cats are companion animals for many people and there is usually only a few generation’s difference between wild* cats and their domestic counterparts. We at Cheltenham Cat Rescue often see the impossible become possible; cats with little to no past human contact can be socialised within months, with the right care. If you think that there is a world of difference between a wild and a domesticated cat, you are likely to be mistaken. Companion, wild and stray cats are all part of the same species, felis catus.

More and more young people are making ethical choices for animals in Victoria’s largest city. On April 28, 2018, 3,000 animal rights supporters marched in Melbourne (The Age 2018), preceding Labor’s call to end Live Sheep Export on May 3 (ABC News 2018). It goes without saying that this growing constituency would find the shooting of innocent cats abhorrent, along with many other voters who are against cruelty to animals.

This is Labor’s opportunity to show that it can increase its relevance for young people; many more of whom are voting for the Greens in crucial inner-city seats.

It seems that because of the disproportionate voice of the Shooters, Fishers and Farmers Party and misguided environmentalists, this proposal is up for discussion – not to mention happening under the radar. But it doesn’t have to be this way.

2. Risk to stray and domesticated roaming cats

This proposal implies that cats will not be scanned for microchips before being culled. Imagine the Victorian community’s response when their beloved, micro-chipped companion animals are shot and killed for roaming outside.

Note that at our cat rescue we advocate for keeping cats indoors.

3. This is an open contradiction to the Victorian Government’s Animal Welfare Plan

You have highlighted the need for a ‘modern Animal Welfare Act (Animal Welfare Action Plan December 2017)’. You have invited our consultation, so please entertain our insights on what exactly constitutes modern animal welfare in the Victorian Community. Let us present to you our interpretation.

Your vision statement states that you want ‘A Victoria that fosters the caring and respectful treatment of animals.’ What is the point of a vision statement when the actions you take with this plan openly contradict care, respect and even science.  

Your purpose is ‘To ensure Victoria continues to improve animal welfare and is well respected globally for animal welfare practices.’ This proposal is and will be opposed by animal rescue groups, who will be vocal and attract criticism to the Andrew’s Government.
You aim to have ‘compliance and enforcement that is efficient and effective.’ In our section on lack of evidence below we will prove that repeated, global attempts at cat culling have been ineffective. If something is ineffective it is not possible for it to be efficient.

Your plan refers to evidence-based decision making and the importance of science. ‘Science demonstrates that animals are sentient. This means they experience feelings and emotions such as pleasure, comfort, discomfort, fear and pain. Sentience is the primary reason that animal welfare is so important.’ If it is sentience that is most important to the Andrew’s Government then this proposal is a massive contradiction of what you say outwardly, versus what is being proposed quietly.

Lastly, your own Agriculture Minister, the Hon Jaala Pulford is pictured with her companion cat. This not only makes the face of your organisation look hypocritical; it is offensive to the whole cat species whom you are claiming to have compassion for.  

Please note that we have been attempting to secure a meeting with your Minister since 2017 and despite the criticisms of your government we may state below, we would like nothing more than a harmonious working relationship with your members.

4. A lack of evidence

No causal link exists between culling wild cat populations and better outcomes for native wildlife.

Studies show that the overwhelming cause of wildlife depletion is destruction of natural habitat due to manmade structures, chemical pollution, pesticides and drought – not wild cats. The United States government tracks how many birds, for example are killed through anthropogenic causes (Erickson 2011) and cats do not make that list.

There is even groundbreaking evidence released in 2014 (Lazenby) that ‘Compared with the average, the minimum number of feral cats known to be alive (MKTBA) for feral cats during the pre- and post-culling surveys, cat numbers increased by 211% and 75%, respectively, during the 13-month period of culling at the Mount Field and Tasman Peninsula study sites.’
Studies prove that cats are not a significant threat, especially when compared to the very real dangers from human activities, and that they play important roles in balancing the local ecosystem. For example, they often step in to fill the place of now extinct or greatly diminished small predators.

We note that the wildlife species used as justification for this proposal are mostly birds.

You may be interested to know that wild cats are opportunistic feeders - they will eat whatever food is easiest to find. For many wild cats, people’s garbage is a main source of food. Just as cats 10,000 years ago were attracted to the easy, consistent food source that the first human settlements provided, wild cats today scavenge on the scraps that all human habitats inevitably produce. A study of a feral cat colony in Brooklyn found that the cats depended more on local garbage for food than on either prey or food provided by caregivers, and that the neighborhood produced enough garbage to feed three times more cats than actually lived in that area (Grayson et al 2007), (Alley Cat Allies 2018).

If cats hunt, they prefer rodents. The staunchest opponents of Trap-Neuter-Return (TNR) would prefer having all outside cats be rounded up and killed instead of allowed to continue their lives outdoors. They mislead the public.

Decades of studies prove that when cats do hunt, rodents and insects are the prey they hunt and consume the most. Studies have shown cats to be far more efficient hunters when they sit and wait for prey - outside a rodent burrow, for example - than when they stalk and pounce, the way they approach birds. As opportunistic feeders, cats are more likely to go for your garbage, eat bugs, or sit and wait to catch rodents than take their chances chasing birds who can easily spot them and fly away (Alley Cat Allies 2018).

The complexity of the Victorian ecosystem needs to be considered. If you understand ecosystems, removing cats is worse for everyone. Opponents of TNR often call for cats to be trapped and killed or relocated to protect wildlife. Since there is no evidence that cats are a species-endangering threat to any of our bird species, there’s no foundation for calls to remove and/or kill outdoor cats from [our] landscape. Cats play a complex role in local ecosystems and cannot simply be removed from any environment without consequences. The scientific phenomena; compensatory predation, the mesopredator release effect and the vacuum effect all illustrate why removing cats is harmful to the entire habitat, and why TNR is truly the best approach (Grayson et al 2007), (Alley Cat Allies 2018).

Compensatory Predation is also something to consider. Although cats do occasionally prey on other animals, taking a bird here or there doesn’t necessarily impact the survival of the species. Evidence suggests that cat predation is often “compensatory predation” - preying on animals that would likely have died anyway from disease or hunger. Studies show that the animals caught by predators are generally weaker and more diseased than those killed by manmade sources. One study found that ‘birds killed by cats had significantly lower mass, fat scores, and pectoral muscle mass scores’ than birds of the same species killed by cars or windows (Lepczyk 2009). These studies indicate that cats are catching what some biologists refer to as the “doomed surplus”—animals who would not have lived, and so whose death does not affect overall population levels.

Maintaining ecological balance is far more complicated than cats versus birds, predator versus prey. While cats sometimes might be the top predators in their environments, some of the animals they prey on are also predators, like rats. The predators who fall lower on the food chain are called mesopredators. They prey on certain species - in the case of rats, small or fledgling birds and bird eggs - while being prey to larger predators themselves (Prue et al 2009).

5. This proposal is unsuitable for Victoria’s open environmental system

According to a 2014 Tasmanian study, Australia is an open system and eradication of wild or stray cats is complicated by the greater diversity of non-target species and sheer space that needs to be covered. These systems are also very vulnerable to re-invasion of cats. Culling ‘may alleviate, but does not remove, the predation threat and impact on prey species.’ (Lazenby 2014) Re-invasion is inevitable, making this proposal a waste of taxpayer’s money.

The only documented “successful” effort to remove a population of cats occurred in a cruel program on uninhabited, sub-Antarctic Marion Island (Ratcliffe et al 2009). It took two decades and ruthless methods that are impossible to replicate in areas inhabited by people, including poisoning, hunting with guns, and introducing disease to clear the island of cats. As scientists tried each method, they noted “the recolonisation of preferred habitats, cleared of cats, from neighbouring suboptimal areas…” In other words, like the mountain lions, whenever they killed cats in the best habitats, the cats next door simply moved in. Lazenby (2014) also backs this up: ‘The greatest reductions in cat populations, including complete eradication, have been achieved on small islands where refuges are limited and immigration is non-existent.’

The Victorian Government would be more successful if it allocated resources to educating the community on de-sexing stray and household cats, provided incentives to councils for de-sexing programs and conducted trap-neuter-release on government land.

6. It is not possible to measure the success of this initiative, end-to-end

Monitoring the success of the Feral Cats Declaration will be next to impossible due to the ‘cryptic and wary behavior’ of cats. Lazenby (2014) states that ‘less invasive and humane techniques for monitoring abundance are required’, such as collection of hair samples, analysis of genetic markers and infrared cameras – all effective and readily available with recent advances in technology.  Lazenby also states that the results of the Tasmanian study ‘highlight the need for monitoring effectiveness of any operations that seek to reduce the impacts of feral cats.’

We do not see this proposal as much more than an attempt to cater to the cruel and inhumane hobby of shooting animals and killing them.

7. A waste of resources

Due to the lack of evidence for efficacy of cat culling, this is a colossal and unscientific waste of taxpayer money.

In conclusion, nobody sums up our argument better than Lazenby on his 2014 study in Tazmania:

‘The low-level culling effort we used did not constitute a sustained, multi-faceted, long-term downward pressure on our study populations, which may be required if culling is to be used in programs of feral-cat control (Braysher 1993; Olsen 1998; Hone 2007; Dickman et al. 2010). Rather, this study provides evidence that ad hoc culling of feral cats may be not only ineffective, but has the potential to increase the impact of feral cats in open populations. Even worse, the decline in numbers of cats trapped over the 13-month cull could have led to erroneous conclusions that the culling was effective if we had not been able to monitor the populations independently.’

We at our cat rescue urge you to reconsider this proposal as it would have catastrophic consequences for  wild, stray and potentially domesticated cats, as well as being a fiscally irresponsible, unpopular and unscientific action to take.

There is a bibliography - but let's face it, no one will read it. I would be happy to send to anyone interested. 



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