BITTERSWEET or just plain BITTER?!? Rise in panthers deaths good sign January 02, 2010 2:18 AM
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Rise in panther deaths good sign Follows growth in population
by kevin lollar Ft. Myers News-Press January 1, 2010
Last years Florida panther death count 24, including a record 17 vehicle-related deaths is almost seven times higher than the average mortality of the 1980s and more than four times the average of the 1990s.
At first glance, such a dramatic increase in deaths of an endangered species is disturbing.
But the rising body count is logical, even encouraging, in a morbid sort of way: The panther population has grown substantially since the mid-1990s, and more panthers mean more deaths, said Paul Souza, field supervisor of the U.S. Fish and Wildlife Services South Florida office.
Were tracking the animals in a way thats helped us understand the health of the population, Souza said. If you put a graph up showing panther mortality per year and the population increase, they track almost perfectly.
During the 1980s, an average of 3.2 panther deaths were recorded every year; in the 1990s, the average was 5.3; since 2000, the average was 18 the record for panther deaths is 25, set in 2007.
While panther deaths have increased, so have panther numbers: Since the 1980s, the population has tripled to about 100.
Florida panthers, a subspecies of the cougar, once ranged through South Carolina, Tennessee, Georgia, Mississippi, Alabama, Arkansas, Louisiana and Texas and interbred with the Texas cougar and a now-extinct Northeastern subspecies.
As development destroyed panther habitat and panthers were killed for sport or to protect livestock, the shrinking panther population was restricted to South Florida, mostly in the southwest part of the state.
With the population confined to such a small area, inbreeding was common and led to genetic abnormalities such as heart defects and reproductive problems.
According to panther experts, the biggest reason for the increase in the panther population is the introduction in 1995 of eight female cougars into South Florida to mate with local panthers and improve the gene pool.
What weve seen since the genetic restoration effort is that the population has a trajectory of improvement, Souza said. We had about 30 panthers in the early 90s. Two years ago, we had the healthiest number weve ever counted: 117. Last year, we had 100 or so. Were seeing the population peaked out in Southwest Florida.
In scientific terms, Southwest Florida has reached its carrying capacity: The area cant support a higher panther population.
So panthers have started heading north.
Dispersing males fairly regularly cross the Caloosahatchee, Souza said. Weve found them in south central Florida and as far north as Georgia. But we havent seen any females north of the Caloosahatchee.
Earlier this year, however, panther experts found evidence of a female in the dispersal zone, 44 square miles in northern Hendry and southern Glades counties that is the last migration corridor for panthers across the river.
Four times over the past decade, including the past three years, the yearly panther death count was more than 20, which means that one-fifth of the population died in a single year four different years.
Meanwhile, enough kittens are being born and surviving to sustain the population.
This years most disturbing panther statistic is the number of roadkills 17 in a population of about 100 died from a single cause. The most recent was Thursday when a 3-4-month old female was found on County Barn Road in Naples.
Thats 16 percent of the population, Dave Onorato, a research scientist with the Florida Fish and Wildlife Conservation Commissions panther section, said before Thursdays announcement of a 17th death. The increase in roadkills comes with an increase in the panther population. It also comes with an increase in the (human) population of Florida: Thats going to increase traffic on our roadways.
Its kind of a bitter-sweet thing: There are more panthers, but were losing more of them on the road than we did before.
Experts agree that the way to protect panthers from vehicles, is to build more wildlife crossings.
But building underpasses and installing high fencing is an expensive proposition, Onorato said. Another thing we can do is tell people to be more aware when theyre driving at dusk and dawn. Thats when panthers are moving.
With cold weather, like now, panthers are more likely to be up and about during the day.
January 05, 2010 9:22 AM
Ok, now tell me what s wrong with this!!! They said quote below.
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the population has tripled to
but, the numbers of deaths has been equal yet they are saying the population is growing?? Either they can't count or they are in la la land.
More of them are being killed every year so please tell me where they think it's growing??!! I'm confused?