A copy of Mac OS X 10.5 Leopard (or earlier): We can’t tell you how to obtain this, but a simple Google search will. You will need an.ISO file that should be saved directly to your iPhone or iPad. Differences in prey availability between landlocked alewife lakes and anadromous alewife lakes (and the marine environment) suggest that phenotypic differences are adaptive (Palkovacs and Post 2008), and genetic data show that phenotypic differences have emerged rapidly (in the past 300–5000 years) and repeatedly in independently isolated.
Alewife (Alosa pseudoharengus) - Native
An 11-inch sea run alewife from Brides Brook, East Lyme.
Identification. Very similar to blueback herring. Cheek patch wider than deep. Tongue is not visible in profile when mouth is held open. Eye width usually greater than snout length. Lower jaw rises steeply within mouth. Usually a single dark spot on shoulder. Back usually looks grayish-green on live fish, fading to silver on sides and white on belly. Peritoneum (lining of gut cavity) silvery to dusky.
A 2.5-inch juvenile Connecticut River alewife.
Size. Anadromous alewives commonly 9 to 11 inches, landlocked 3 to 6 inches. Conn. max. observed size 12.6 inches (anadromous). State survey max. size 11 inches (landlocked). Max. reported size 16 inches.
Distribution. Anadromous populations occur along the entire Atlantic Coast from Nova Scotia to North Carolina. Landlocked populations have been established in several Atlantic coastal states and in the Great Lakes. In Connecticut, anadromous alewives make early spring spawning runs up many rivers and coastal streams that flow into Long Island Sound. Young alewives feed in the rivers of their birth and migrate to the ocean anywhere from late spring to fall. Some coastal lakes have naturally landlocked alewife populations, but most inland populations were introduced (primarily during the 1960s and 1970s). Both anadromous and landlocked alewives are typically common to abundant where they occur.
All maps created in 2009. See CT DEEP Fish Community Data for updated distributions.
Habits. Alewives are a schooling fish. Anadromous alewives spend most of their adult lives in the ocean and return to the freshwater streams of their origin in the early spring to spawn. They typically spawn in ponds or backwaters of larger streams. Landlocked alewives form large schools that often come into the shallows at night. Adult landlocked alewives and young of anadromous herring species can often be seen flipping (or “popping”) on the surface in the evening. Although they feed primarily on zooplankton, both anadromous and landlocked alewives can be enticed to hit a small jig or fly. Popular methods of catching anadromous herring have been by snagging in mainstem sections of rivers or by dip netting in spawning streams.
A 5-inch landlocked alewife. Alewives are the only herring that currently have landlocked populations in Connecticut.
Comments. The only herring in Connecticut that has landlocked populations. Landlocked alewives are important prey fish for large pelagic predators, such as brown trout. However, because they have a propensity for overgrazing zooplankton, they can cause adverse environmental impacts to water quality, as well as to growth and survival of the young of other fish species. Introduction of alewives (circa 1990) of an unknown source led to the demise of a popular kokanee fishery in East Twin Lake (Salisbury). Anadromous alewives are important forage fish for large gamefish, such as striped bass and bluefish, as well as many other animals, including osprey and marine mammals. Anadromous alewife runs in Connecticut began to increase in response to construction of fishways at dams in the 1980s, but populations declined precipitously during the 1990s for reasons that are not fully understood. One theory is increased predation following the dramatic stock recovery of striped bass. The best way to observe alewife spawning runs is to visit local fishways during warm nights in April.
Text and images adapted from Jacobs, R. P., O'Donnell, E. B., and Connecticut DEEP. (2009). A Pictorial Guide to Freshwater Fishes of Connecticut. Hartford, CT. Available for purchase at the DEEP Store.
We design Mac hardware and software with advanced technologies that work together to run apps more securely, protect your data, and help keep you safe on the web. And with macOS Big Sur available as a free upgrade, it’s easy to get the most secure version of macOS for your Mac.*
Apple M1 chip.
A shared architecture for security.
The Apple M1 chip with built-in Secure Enclave brings the same powerful security capabilities of iPhone to Mac — protecting your login password, automatically encrypting your data, and powering file-level encryption so you stay safe. And the Apple M1 chip keeps macOS secure while it’s running, just as iOS has protected iPhone for years.
Apple helps you keep your Mac secure with software updates.
The best way to keep your Mac secure is to run the latest software. When new updates are available, macOS sends you a notification — or you can opt in to have updates installed automatically when your Mac is not in use. macOS checks for new updates every day and starts applying them in the background, so it’s easier and faster than ever to always have the latest and safest version.
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Protection starts at the core.
The technically sophisticated runtime protections in macOS work at the very core of your Mac to keep your system safe from malware. This starts with state-of-the-art antivirus software built in to block and remove malware. Technologies like XD (execute disable), ASLR (address space layout randomization), and SIP (system integrity protection) make it difficult for malware to do harm, and they ensure that processes with root permission cannot change critical system files.
Download apps safely from the Mac App Store. And the internet.
Now apps from both the App Store and the internet can be installed worry-free. App Review makes sure each app in the App Store is reviewed before it’s accepted. Gatekeeper on your Mac ensures that all apps from the internet have already been checked by Apple for known malicious code — before you run them the first time. If there’s ever a problem with an app, Apple can quickly stop new installations and even block the app from launching again.
Stay in control of what data apps can access.
Apps need your permission to access files in your Documents, Downloads, and Desktop folders as well as in iCloud Drive and external volumes. And you’ll be prompted before any app can access the camera or mic, capture keyboard activity, or take a photo or video of your screen.
FileVault 2 encrypts your data.
With FileVault 2, your data is safe and secure — even if your Mac falls into the wrong hands. FileVault 2 encrypts the entire drive on your Mac, protecting your data with XTS-AES 128 encryption. Mac computers built on the Apple M1 chip take data protection even further by using dedicated hardware to protect your login password and enabling file-level encryption, which developers can take advantage of — just as on iPhone.
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Designed to protect your privacy.
Online privacy isn’t just something you should hope for — it’s something you should expect. That’s why Safari comes with powerful privacy protection technology built in, including Intelligent Tracking Prevention that identifies trackers and helps prevent them from profiling or following you across the web. A new weekly Privacy Report on your start page shows how Safari protects you as you browse over time. Or click the Privacy Report button in your Safari toolbar for an instant snapshot of the cross-site trackers Safari is actively preventing on that web page.
Automatic protections from intruders.
Safari uses iCloud Keychain to securely store your passwords across all your devices. If it ever detects a security concern, Password Monitoring will alert you. Safari also prevents suspicious websites from loading and warns you if they’re detected. And because it runs web pages in separate processes, any harmful code is confined to a single browser tab and can’t crash the whole browser or access your data.
Find your missing Mac with Find My.
The Find My app can help you locate a missing Mac — even if it’s offline or sleeping — by sending out Bluetooth signals that can be detected by nearby Apple devices. These devices then relay the detected location of your Mac to iCloud so you can locate it. It’s all anonymous and encrypted end-to-end so no one — including Apple — knows the identity of any reporting device or the location of your Mac. And it all happens silently using tiny bits of data that piggyback on existing network traffic. So there’s no need to worry about your battery life, your data usage, or your privacy being compromised.
Keep your Mac safe.
Even if it’s in the wrong hands.
All Mac systems built on the Apple M1 chip or with the Apple T2 Security Chip support Activation Lock, just like your iPhone or iPad. So if your Mac is ever misplaced or lost, the only person who can erase and reactivate it is you.