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Food Plot Exclusion Cages

Food Plot Exclusion Cages

I routinely receive calls about “failed food plots.”  My normal response is to ask about soil testing first.  If they performed a soil test and applied fertilizers according to the test, I move on to more questions about the planting methods.  I ask what was planted, how was it planted, when was it planted.  In some cases, we don’t find the problem even after all these questions.  This leads me to my next question:  Did you put exclusion cages on your plot?

Exclusion cage in food plot with heavy deer feeding. Photo Credit: Jennifer Bearden

In my experience, I have seen wildlife feed so heavily on the food plot that you think it has failed.  This can happen when you have high populations or where non-target animals feed on the plot.  In one case, I saw turkeys feeding on newly sprouted plants so heavily that we had “bald spots” in the plot.  In another instance, I was called to check a chufa plot that wasn’t performing well.  When I arrived at the plot, there were rabbits digging up the chufas and eating them before they sprouted.  In the photo here, I am showing heavy deer feeding on a demonstration plot with exclusion cages.  Without exclusion cages, I would have assumed a crop failure.

Exclusion cages are simple structures that allow you to see what is growing in the plot versus what the wildlife are eating.  They are easy to create and put in place.  I use field fence with small openings.  I use a piece that is about 5-6 foot long by 3-4 foot high.  I roll the fence and make it into a circle that is about 18 inches in diameter.  Then, I secure the cage in the plot with landscape staples or rods/posts.  I normally install these directly after planting and fertilizing the plot.

exclusion cage in food plot

Exclusion Cage in food plot with more normal deer feeding. Photo Credit: Jennifer Bearden

Exclusion cages are just another tool to use in evaluating food plot success.  These simple tools allow us to see what is growing and compare that to what the wildlife are eating.  This allows us to evaluate the food plot.  I would also recommend using visual observation.  Look for wildlife sign in the food plot.  What tracks do you see?  Do you see evidence of feeding on the forages?  Game cameras are also helpful in determining what wildlife are feeding on the plot.  Use your tools wisely to evaluate food plot success each season and adjust accordingly.

Poecilids, Livebearing Fish of the Florida Panhandle

Poecilids, Livebearing Fish of the Florida Panhandle

Members of the family Poeciliidae are what many call “livebearers”.  Live bearing meaning they do lay eggs as most fish do, but rather give birth to live young.  But this is not to be confused with live-bearing you find in mammals – which is different.

 

Most fish lay eggs.  The females and males typically have a courtship ritual that ends with the female’s eggs (roe) being laid on some substrate, or released into the water column, and the male’s sperm (milt) are released over them.  Once fertilized the gelatinous covered eggs begin to develop.

 

Everything the developing young need to survive is provide within the egg.  The embryo is suspended in a semi-gelatinous fluid called the amnion.  Oxygen and carbon dioxide gas exchange occurs through this amnion and through the gelatinous covering of the egg itself.  Food is provided in the form of yolk, which is found in a sac attached to the embryo.  There is a second sac, the allantois, where waste is deposited. When the yolk is low and the allantois full – it is time to hatch.  This usually occurs in just a few days and often the baby fish (fry) are born with the yolk sac still attached.  Parental care is rare, they are usually on their own.

 

With “livebearers” in the family Poecillidae it is different.

The males have a modified anal fin called a gonopodium.  They fertilize the roe not externally but rather internally – more like mammals.  The fertilized eggs develop the same as those of other fish.  There is a yolk sac and allantois, and the embryo is covered in amnion within the gelatinous egg covering.  But these eggs are held WITHIN the female, not laid on the substrate or released into the water column.  When they hatch the live fry swim from the mother into the bright new world – hence the term “livebearer”.

 

There are advantages to this method.  The eggs are protected inside the mother, and she obviously provides parental care to her offspring.  However, this does make her much slower and an easier target for predators.  There is some give and take.

 

This differs from the “live-bearing” of most mammals in that there is still an egg.  Mammals do still have a yolk sac but feeding and removing waste is done THROUGH THE MOTHER.  Meaning the embryo is attached to the mother via an umbilical cord where the mother provides food and removes waste trough her placenta.  There is no classic egg in this case.  I say most mammals because there are two who live in Australia that still do lay eggs – the platypus and the spiny anteater, and the marsupials (kangaroos and opossums) are a little different as well – but marsupials do no lay eggs.

 

Biologists have terms for these.  Oviparous are vertebrates that lay eggs – such as fish, frogs, turtles, and birds.  Ovoviviparous are vertebrates that produce eggs but keep them within the mother where they hatch – such as some sharks, some snakes, and the live bearing fish we are talking about here.  Then there are the viviparous vertebrates that do not have an egg but rather the embryo is attached, and fed by, the mother herself – like most mammals.

Sailfin Molly. The male is the fish above with the large “sailfin”. Note the gonopodium on his ventral side.
Photo: University of Florida

The livebearers of the family Poeciliidae are ovoviviparous.  They are primarily small freshwater fish that are very popular in the aquarium trade.  But there are two species that can tolerate saltwater and enter the estuaries of the northern Gulf of Mexico: the sailfin molly and the mosquitofish.

 

The Sailfin Molly (Poecilia latipinna) is the same fish sold in aquarium stores as the black molly.  The black phase is quite common in freshwater habitats, but in the estuarine marshes the fish is more of a gray color with lateral stripes that is made up of a series of dots.  They are short-stout bodied fish and the males possess the large sail-like dorsal fin from which the species gets its common name.  The females resemble the males albeit no large sailfin and most found are usually round and full of developing eggs.  They are very common in local salt marshes and often found in isolated pools within these habitats.  The biogeographic range of this species is restricted to the southern United States, reported from South Carolina throughout the Gulf of Mexico.  One would guess temperature may be a barrier to their dispersal further north along the Atlantic seaboard.

The mosquitofish.
Photo: University of Florida

The Mosquitofish (Gambusia affinis) is familiar to many people whether they know it or not.  Those who know the fish know they are famous for the habit of consuming mosquito larva and some, including our county mosquito control unit, use them to control these unwanted flying insects.  For those who may they are not familiar with it, this is the fish frequently seen in roadside ditches, ephemeral ponds that show up after rainstorms, retention ponds, and other scattered bodies of freshwater within the community.  Most who see them call them “minnows”.  There is always the question as to “where did they come from?”  You have a vacant lot – it rains one day – these small fish show up – where did they come from?  The same can be said for community retention ponds.  The county comes in a digs a hole – it rains one day, and the retention pond fills – and there are fish in it.  One explanation to their source is the movement of fish by wading birds, where the fish incidentally become attached to their feet.  Again, they are often released intentionally to help control local mosquito populations.  This fish is found in our coastal estuaries but does not seem to like saltwater as well as the sailfin molly.  It is found in cooler water ranging throughout the Gulf and as far north as New Jersey.

 

Both of these fish make excellent aquarium pets, and the sailfin molly in particular can be beautiful to watch.

 

Reference

 

Hoese, H.D., Moore, R.H. 1977. Fishes of the Gulf of Mexico; Texas, Louisiana, and Adjacent Waters. Texas A&M Press, College Station TX. Pp. 327.

A Cold Winter’s Snake – the Garter

A Cold Winter’s Snake – the Garter

When hiking around the Florida panhandle in midwinter, most snakes are undercover trying to avoid the chilly cold fronts that pass through and can drop temperatures close to freezing.  So, the probability of seeing one is low.  But one species, the eastern garter snake, seems to tolerate cold temperatures better.  They are often found basking on open areas this time of year and are quite common not only on the trails, but in our home landscapes as well.

 

But not to fear…

This is one of the 40 non-venomous snakes found in our state.  Many are afraid of these animals because… well… because they are snakes, and that is all that need to be said – at least for some.  But for others, they understand the benefits snakes provide to the ecosystem (controlling unwanted pests) and to see one is kind of exciting.  Being non-venomous does not mean they will not bite, they certainly will, but no venom is associated with it.  Larger non-venomous snake bites can be painful, but not deadly.  Garter snake bites barely hurt.

The eastern garter snake is one of the few who are active during the cold months.
Photo: Molly O’Connor

Recently my wife and I were on a hike with our grandsons in central Escambia County.  At one point my oldest grandson said “snake”.  I am not sure how he saw it actually.  It was a young eastern garter snake basking in the middle of the trail.  These snakes have colorful patterns of stripes and squares that help them blend in well.  We knew right away what it was and were all excited to see it.  Knowing it was harmless we allowed him to pick it up but warned him that it would most likely bite.  Garter snakes tend to flee when first alarmed but will turn and bite if cornered.  They will sometimes rattle their tails in the leaves giving off a “buzzing” sound and can release a musk to warn the predator.  But this young snake did neither, no rattling, no musk.  However, it did try to bite him.  After a few photos and the amazement of seeing one, we released it in a sunny spot to continue its midday basking.  It was pretty cool.

 

Many reading this have seen many garter snakes and know this as a harmless animal.  They are found all across the state of Florida and much of the eastern United States.  There is a subspecies, the blue-striped garter snake, that can be found in the Big Bend area of Florida, but the differences are minor.

 

Eastern garter snakes are smaller snakes, usually reaching two feet but there is a four-footer on record.  They like to inhabit areas that are near water where their favorite prey (amphibians) can be found.  Preferring open grassy areas, they can be found in wooded habitats and are often found in lawns and gardens of local neighborhoods.

 

They hunt primarily during the daylight hours for amphibians but will also eat fish and earthworms.  Some have been found to feed on snails, slugs, and even small snakes, birds, and mammals.  They are not constrictors but rather grab their prey and swallow it whole.

 

They are famous for their large gatherings during breeding season.  In spring, females will release a pheromone to attract the males, and the males will come, many of them at one time.  There are locations in Canada where literally thousands gather at one location.  The females do not lay eggs but rather give birth to about 20-30 live young in late summer or fall, it could be up to 100 in a litter.  These large groups of slithering garters bring back images from movies where “snake pits” and “a den of snakes” are portrayed.  I have never seen such a gathering, and in the southeast, they do not happen in such large numbers as these, but it would be cool.

 

This time of year, on sunny days in open basking areas, you may see this small but neat snake.  The same could be true if hiking near an open sunny location.  So, keep your eyes down and maybe you will get lucky.

 

References

 

Common Garter Snake. 2021. Florida Snake ID Guide. Florida Museum of Natural History. Common Gartersnake – Florida Snake ID Guide (ufl.edu).

 

Gibbons, W. 2017. Snakes of the Eastern United States. University of Georgia Press, Athens GA. Pp. 416.

 

Gibbons, W., Dorcas, M. 2007.  Snakes of the Southeast. University of Georgia Press, Athens GA. Pp. 253.

Chronic Wasting Disease Gets Closer to Florida

Chronic Wasting Disease Gets Closer to Florida

Below is a bulletin sent out by Florida Fish & Wildlife Conservation Commission on 01/10/2022 02:53

Chronic wasting disease or CWD was recently detected in a hunter-harvested deer in northwestern Alabama, making it the 28th state where CWD has been documentedIt’s the first time CWD has been detected in a state that borders Florida. CWD, which is a brain and central nervous system disease that is always fatal to members of the deer family, has not been detected in Florida.

The FWC asks people who plan to hunt deer, elk, moose, caribou or other members of the deer family outside of Florida to be vigilant in helping reduce the risk of CWD spreading into Florida. An important step is to be aware of and follow the rules that prohibit importing or possessing whole carcasses or high-risk parts of all species of the deer family originating from any place outside of Florida.

Under the new rules, which took effect July 2021, people may only import into Florida:

  • De-boned meat
  • Finished taxidermy mounts
  • Clean hides and antlers
  • Skulls, skull caps and teeth if all soft tissue has been removed

The only exception to this rule is deer harvested from a property in Georgia or Alabama that is bisected by the Florida state line AND under the same ownership may be imported into Florida. For more information about the new rules, see this infographic and video.

These rule changes continue the FWC’s work to protect Florida’s deer populations from CWD spreading into the state.

 

 

 

Source: myfwc.com

Click Here for more information on CWD

Wildlife on the Beach in January

Wildlife on the Beach in January

During 2022 I plan to make weekly hikes on Pensacola Beach to see what sort of wildlife, or other natural phenomena, I encounter each month.  For the first January trip I did a short hike at Ft. Pickens on the west end of Santa Rosa Island.

 

Ft. Pickens is more wooded than much of the island and provides both maritime forest and beach habitats for a variety of wildlife.  On my first trip – Jan 6 – the temperature was 62°F and overcast.  It actually rained some during the hike.  As I approached the fort area, I saw a bald eagle sitting on a sand dune.

A bald eagle sitting on a dune near Pensacola Beach.
Photo: Rick O’Connor

Everyone gets excited about seeing a bald eagle.  Its like dolphins, no matter how many times you see them, it is still cool, and you alert everyone they are there.  The difference with bald eagles is that they were not always here.  Growing up in Pensacola I rarely saw one.  I worked for a period of time on what were called “the ponds” on the property of Air Products in Pace, Florida.  The ponds were a water treatment system to help improve water quality coming from the plant being discharged into Escambia Bay.  It was a wildlife sanctuary and there was plenty of wildlife there.  Cottonmouths, deer, turtles, raccoons, and alligators were all common.  One of the largest eastern diamondback rattlesnakes I have ever seen was found there.  And, during the winter months, we would occasionally get a bald eagle.  It was rare and very exciting.

 

A field guide of Birds of the Eastern United States published by Roger Tory Peterson in 1980 indicates that their winter breeding range includes much of Florida.  A document published by the U.S. Fish and Wildlife suggest they begin building nests in our area in September, lay eggs by October, and hatching occurs in November.  Between November and March, the parents take care of them until the fledge and head out on their own.  The reason we have not seen more in our younger years was their population was down.  The decline of the national bird was due to a variety of reasons, but the DDT story played a role.

 

Today their numbers have rebounded and encounters with them in our area have increased.  Their nest can be quite large and are usually close to a water source.  These birds are known as predators but actually spend a lot of time feeding on carrion and robbing other birds of their food source.  Competition between the osprey, another recovering species, and bald eagles are quite famous.  And, like I said, you never get tired of seeing them.  This time of year, you can spot them in several locations around the beach areas.

 

Other creatures found on this January hike at Ft. Pickens included:

Great blue herons use tall pines for nesting during winter.
Photo: Rick O’Connor

Mockingbirds are quite common in the winter. This one was feeding on the red berries of a yaupon holly.
Photo: Rick O’Connor

 

 

 

 

 

 

 

 

 

This green blob is actually a sea slug known as a sea hare. It was returned to the water.
Photo: Rick O’Connor

This structure is often found on panhandle beaches. It is the egg case of the snail known as the moon snail. Also called the “shark’s eye” or “cat’s eye”.
Photo: Rick O’Connor

 

 

 

 

 

 

 

 

 

 

Unfortunately dead seabirds on the beach are not uncommon. This one is a pelican.
Photo: Rick O’Connor

 

 

 

 

 

 

 

 

 

 

I encourage to take some time this winter and go for a hike and see what you can discover.

It’s Coyote Season Again

It’s Coyote Season Again

Over the years I have received many calls from beach residents with concerns about coyotes.  Encounters with this animal can be unnerving for many and the most common time of year for them is winter.

Coyote seen on Pensacola Beach.
Photo: Kristen Marks

A friend of mine who lives in the central part of Escambia County, told me he had seen several coyotes over Christmas break and several more along I-10 while driving back and forth from Mobile Alabama.  Winter is breeding time for these animals.  Early in the breeding season males are on the move seeking mates.  Their searching may lead them to move at all times of the day and not just the dawn/dusk and evening times they typically do.  Hence, more encounters.

 

Once pregnant, the females will find a den to give birth and care for the young.  Dens are usually burrow areas, under logs, or within thick vegetation, but sometimes they have been found under decks or other debris in the yard.  Gestation is about two months, and a litter is typically about six pups.  Once born, the female will need to feed her young and will seek food from a lot of places and during all parts of the day.  Hence, more encounters.

 

Coyotes are omnivores and have a wide diet.  During the cold months their natural prey would be rodents and birds, but garbage and left out pet food are much easier to grab than birds and mammals, has a stronger smell, and higher caloric intake.  It is more desired.  Encounters with pet food can led to encounter with pets, and this could end bad for the pet.  It is recommended that during these colder months you feed your pets, and store their food, indoors.  Keeping your small pets indoors at night is recommended as well.  Close and secure your garbage as best you can.  Coyotes are pretty intelligent and will make an attempt to access this garbage if given the opportunity.  Note that intentionally feeding a coyote is illegal.  They have a natural fear of humans and if they are being fed, they will lose this fear which could lead to negative encounters with the animal.

A coyote is seen racing down Via DeLuna Blvd on Pensacola Beach
Photo: Shelley Johnson

Some may be concerned about the “pack behavior” of coyotes.  Most are solitary but small packs of about six animals are known to move about the landscape usually calling to each other near dawn and dusk with their iconic howls and yips.  The typical range for a group of six is about 10 square miles, which would lead to the argument that there are not many resident coyotes on Pensacola Beach or Perdido Key, but we know they are there.  Some coyotes have been seen crossing the Bob Sikes Bridge between Pensacola Beach and Gulf Breeze near dawn, suggesting coyotes residing in Gulf Breeze may be using resources on Pensacola Beach.

 

If an encounter does happen, you should hold your ground.  Coyotes do have a natural fear of humans and will typically flee.  I recently encountered three animals napping near a large fallen tree while hiking in Colorado.  I was not 100% sure what they were when I first saw what appeared to be ears sticking above the tree.  Then a head popped up to look at me.  I slowly approached, not recommended, and the coyotes immediately got up and ran.  This is what you would expect them to do.  Coyotes standing their ground and not leaving could suggest and animal who has found a reliable food source and may be willing to defend it.  Contact the authorities if you believe this is the case.

A coyote moving on Pensacola Beach near dawn.
Photo provided by Shelley Johnson.

We do not know how many coyotes live in Escambia and Santa Rosa Counties, but it is fair to say they are common.  Encounters are rare and the animal has learned to live near us without provoking problems.  All the same, being aware of pets, pet food, and garbage this time of year is a good practice.