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Motorola MH-450S AAF53X501 Spearker Microphone

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Motorola MH-450S AAF53X501 Spearker Microphone

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Item specifics

Condition:
Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is ... Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections.
Compatible Brand:
For Motorola and Vertex
Type:
Push to Talk Speaker/Mic
Features:
SPEAKER AND MIC
MPN:
AAF53X501
Brand:
Motorola
UPC:
748091007477



Motorola MH-450S AAF53X501 Spearker Microphone

A blog about fish words!

By Abigail Lynch

Kype

Posted by abby on January 7, 2022

This Sockeye Salmon (Oncorhynchus nerka) displays a spawning kype (photo credit: Ron Harris).

Not to be confused with the popular internet phone/video chat platform of a similar name, kypes are hook like structure that develops on the jaw of some male salmonids during the spawning season.  Though Skype for salmon is still far fetched, this secondary sex characteristic does, in fact, have a role in communicating sexual fitness.

Research suggests that kype size has been linked to spawning frequency, via mate choice (that is, female salmon find a hooked jaw desirable) and competition on spawning grounds (namely, battles between males where the winner gets to pass on his genes).  For repeat spawners with an iteroparous reproductive strategy, the elongated jaw is reabsorbed after the spawning season ends.

Posted in: K | Tagged: iteroparous, Engine Camshaft Position Sensor Left Holstein 2CAM0192, 0.33 Ct Round Natural Diamond Praying Angel Cherub Charm Pendant, Sockeye Salmon, spawning

Fish conservation zones (FCZs)

Posted by abby on July 16, 2021

A Fish Conservation Zone (FCZ) located on the Mun River in northeastern Thailand (photo credit: IUCN)

Guest post: Lakshita Dey, George Mason University

Fish conservation zones (FCZs) are areas which are closed off to fishing and other activities in order to protect habitats and restore fish populations. FCZs have emerged as a management strategy in the Mekong Basin to protect and strengthen local communities. These communities benefit by protecting specific areas of water bodies and inland species of fish that reside in the area. 

For more information, please visit: Fish Conservation Zones lead to stronger communities, fewer conflicts and more fish

Posted in: F | Tagged: habitat, management, marine protected areas, Mekong

Amphidromous

Posted by abby on May 21, 2021

‘O’opu nakea (Awaous stamineus) is an important cultural resource for Indigenous Hawaiians.  All five Hawaiian gobies exhibit amphidromous life cycles.

An amphidromous fish is a type of diadromous fish which migrates between fresh and saltwater.  Unlike anadromous and catadromous fish, which migrate explicitly for the purposes of breeding, amphidromous fish migrate for other purposes.  A typical cycle of amphidromy includes eggs hatching in freshwater or estuaries, larvae drifting out into the open ocean to feed and grow, juveniles returning to freshwater to feed and grow, and adults reproducing in freshwater.  Gobies, such as those found on volcanic islands in the Pacific, exhibit an amphidromous life cycle.

For more information, please see:

  • Anadromous
  • Catadromous
  • Diadromous

And, check out the “CAN YOU SAY ANADROMOUS, CATADROMOUS, AMPHIDROMOUS, OCEANODROMOUS, OR POTAMODROMOUS?” post on The Fisheries Blog!

Posted in: A | Tagged: Tenax 7 ft. H x 100 ft. L Polyethylene Garden Fence, catadromous, diadromous, marine and fresh water

Cartilaginous

Posted by abby on September 25, 2020

A Blacktip Reef Shark (Carcharhinus melanopterus) has a fully cartilaginous skeleton (photo credit: David Clode).

If you’ve ever eaten a fish fillet, you’ve probably had the ‘pleasure’ of picking out fish bones from your meal.  While most fish are, indeed, bony (superclass: Osteichthyes), certain lineages of fish have cartilaginous skeletons, meaning that their skeletal structure is composed of cartilage, like a human ear or nose, rather than bone.  Elasmobranchs (sharks, skates, and rays) and chimera (class: Chondrichthyes) have always had cartilaginous skeletons.

 

Atlantic Sturgeon (Acipenser oxyrinchus oxyrinchus) have secondarily derived cartilaginous skeletons (photo credit: NOAA).

Chondrosteans (sturgeon and paddlefish; subclass: Chondrostei) are another group of cartilaginous fish – but with a more complex evolutionary history.  The ancestors of sturgeon and paddlefish had fully ossified, bony skeletons (they are members of Osteichthyes) but they have evolved to have secondarily derived cartilagenous skeletons (i.e., cartilage ➡ bone ➡ cartilage).  They do still retain some bony elements – Sawyer Anastigmat 4" F2.8 Slide Projector Lens which are modified bony scales.

 

 

Posted in: C | Tagged: chimaera, chondrichthyes, elasmobranchs, genetics, 10 New 3/16" 4 Flute Solid Carbide Endmills USA-FREE SHIPPING, placoid denticles, placoid scale, primitive fishes, rays, scute, sharks

Cetí (Español – English)

Posted by abby on April 24, 2020

Ceti is the term for post-larvae of the Puerto Rican native S. plumieri (photo credit: Catherine Goodson).

Las comunidades locales puertorriqueñas se refieren al pes nativo postlarva, S. plumieri, como cetí. Las especies de peces de agua dulce puertorriqueña como “dajao,” “gauvina,” y “olivo,” (nombre común del cetí en su fase adulta) son anfidromas. La historia de vida de estos peces incluyen una fase de aqua dulce y marina. En particular, los olivos adultos viven y se reproducen en las partes altas de los ríos, mientras que las larvas derivan río abajo hasta llegar al mar en donde se convierten en post larvas conocidas como cetí (Erdman 1961).Como resultado, grandes bancos de cetí migran río arriba durante el último cuarto de fase de la luna de cadaciclo lunar, de junio a enero en Puerto Rico (Engman et al. 2017).

Durante la migración río arriba, el cetí se enfrenta a altas Corrientes, depredadores, y perturbaciones naturales y antropogénicas. Por esta razón, tiene un disco de succión ventral que le ayuda a sobrevivir  durante el fase adulta y la fase de cetí. El Olivo (nombre común de S. plumieri)  utiliza el disco de succión ventral para escalar cascadas y otras estructuras, como represas (Keith 2003). Por esta razon, también se les llama chupa piedra. El Olivo  hembra puede crecer hasta 103 mm de largo, mientras que los masculinos pueden identificarse por su color azul irredescente. Si van de visita a Puerto Rico, generalmente pueden encontrar al olivo debajo de las rocas en los ríos o millones de cetí que migran río arriba.

_____________________________________________

Cetí is a term used by local communities in Puerto Rico to refer to native fish species, S. plumieri, during their post-larvae life history. Puerto Rican native freshwater fish, such as mountain mullet, bigmouth sleeper, and sirajo goby, are amphidromous. Their life histories include both fresh and salt water phases; adults reside and spawn in pools and eddies of the upper parts of rivers, while the larvae drift downstream into the ocean, where they reside until they develop into post-larvae, or “cetí” (Erdman 1961). Schools of cetí locate a source of freshwater and proceed to migrate up stream during the last quarter moon phase of each lunar cycle, from June to January in the Caribbean region (Engmanet al. 2017).

During their migration, cetí, as well as other post-larvae native fish species, compete against high currents, predators, natural disturbances and anthropogenic factors. A trait that aids their survival during their cetí and adult phases is their ventral sucking discs which they use to climb the wet surfaces of waterfalls, rocks and any man-made structure with any type of flow (Keith 2003). For this reason, they have been given the nickname “chupapiedra”, meaning rock sucker. Female sirajo (S. plumieri) can grow up to 163 mm, while males can be easily identified by their blue-ish iridescent colors. If you happen to be in Puerto Rico, you can usually find Sirajo gobies underneath rocks in the rivers or millions of post-larvae migrating up the river mouths.

_____________________________________________

References:

Engman, A. C., Kwak, T. J., & Fischer, J. R. (2017). Recruitment phenology and pelagic larval duration in Caribbean amphidromous fishes. Freshwater Science, 36(4), 851-865.

Erdman, D. S. (1961). Notes on the biology of the gobiid fish Sicydiumplumieri in Puerto Rico. Bulletin of Marine Science of the Gulf and Caribbean, 11(1), 448–456.

Erdman, D. S. (1986). The Green Stream Goby, Sicydiumplumieri, in Puerto Rico. Tropical Fish Hobbyist, 34(1), 70–75.

Keith, P. 2003. Biology and ecology of amphidromous Gobiidae of the Indo-Pacific and Caribbean region. Journal of Fish Biology, 63 (1), 831-847.

Posted in: C | Tagged: amphidromous, Español, gobies, post-larvae, Puerto Rico

Mouthbrooding

Posted by abby on March 27, 2020

Eyed eggs in a mouthbrooder (photo credit: The Fish Room).

Guest post: Gretchen Stokes, University of Florida

Mouthbrooding is when fertilized eggs are carried and incubated in the parent’s mouth.  Rather sophisticated for parental care in fishes, it may have evolved from lack of nest sites, predation or habitat invasion.  It occurs in more than 53 genera of fishes.  Mouthbrooding can be conducted by males (paternal), females (maternal) or both.  While more commonly female, parental care by males occurs in some well-known species, including snakeheads and arowana.  Parental feeding is fairly or fully restricted during incubation, as swallowing or chewing could harm egg development.  Brood parasitism can also occur, where a parasitic fish attacks the brooder’s eggs and leaves behind the fertilized eggs for care by the mouthbrooder (e.g. mochokid catfish eggs incubated in cichlid parent’s mouths).

Posted in: M | Tagged: arowana, cichlid, parental care, reproduction, snakehead

Fry

Posted by abby on February 21, 2020

Coho Salmon fry (photo credit: City of Surrey).

Guest post: Gretchen Stokes, University of Florida

Fry refers to a life (growth) stage of fishes that are recently hatched.  This is generally after the yolk sac has been absorbed and almost or entirely disappeared.  At this point, the swim bladder is typically functional and fish can actively feed for themselves.  Depending on the species, this stage can last a few months or more until scales develop.  Fry can be thought of as the “infant” stage for fishes.  Because of their small size at this stage (often only a few centimeters), fry are vulnerable to predation in this stage and need shallow, protected habitat to feed and grow.

Posted in: F | Tagged: growth, juvenile, life history, reproduction, yolk sac

Air-breathing

Posted by abby on January 17, 2020

A mudskipper is an amphibious, air-breathing fish (photo credit: National Aquarium).

Guest post: Gretchen Stokes, University of Florida

Air-breathing fishes are those that respire using aerial gas exchange instead of, or in addition to, that of the water.  Air-breathing is an ancient vertebrate specialization that evolved from aquatic hypoxia (e.g., areas of seasonally flooded wetlands, under ice).  Air-breathing fishes are equipped with one or more modified respiratory structure to breathe, such as modified air bladders, lungs, skin or For VOLVO VNL CAB EXTENSION 2000 Left 1428657.  Some air-breathing fishes (facultative air-breathers) rely mainly on gills with supplemental gas exchange from aerial breathing when conditions are poor or it is too costly to obtain oxygen from water.  Other air-breathers (obligate) require continuous, regular surface breathing.  Yet another group of air-breathing fishes are amphibious, venturing to land either in an active or inactive state.

Air-breathing occurs in an estimated 450 species and 49 families of fishes, most of which are found in the tropics.  In North America, common air-breathing species include gar, tarpon and bowfin.  Aquarium enthusiasts may be familiar with the air-breathing habits of well-known betas.  Globally the list becomes expansive with many unique adaptations, such as lungfishes, mudskippers, snakeheads or air-breathing catfishes.  Whether a gulp of air at the water’s surface, crawling on land to feed, or maintaining a high tolerance to air exposure with specialized skin, air-breathing allows for unique adaptations and survival in extreme environments.

Posted in: A | Tagged: gills, hypoxia, respiration, swim bladder

Fingerling

Posted by abby on December 13, 2019

Fingerling size fish (photo credit: Food and Agriculture Organization).

Guest post: Logan Neu, University of Minnesota Twin Cities

Fingerling is a broad term applied to a juvenile fish that is about the size of a finger.  The definition of what length classifies a fish as a fingerling varies between species, but the Food and Agriculture Organization (FAO) generally defines a fingerling as ranging in length from 10 to 15 centimeters.  The term fingerling is most often used in aquaculture and fish stocking programs because fish at this life stage are more physically developed and better equipped to survive the harsh outdoor environment than earlier life stages.  Most fish stocking programs stock fish at this life stage in order to increase the survival rate of the newly released fish.

Posted in: F | Tagged: aquaculture, growth, hatchery, juvenile, life history, stocking

Substrate

Posted by abby on November 8, 2019

River substrate (photo credit: California Department of Fish and Wildlife).

Guest post: Bonnie Myers, North Carolina State University, USGS

Substrate in streams, rivers, lakes, and the ocean creates important fish habitat and plays an important role in multiple fish life history processes, daily activity, and prey availability. Substrate in aquatic habitats consists of surface and subsurface materials in the streambed, riverbed, or ocean bottom with different fish preferring different types of substrate.
In freshwater ecosystems, substrate is classified by particle size. For example, boulder is classified as substrate larger than 256 millimeters and very fine sand is classified as substrate between 0.0625 and 0.125 millimeters. Sea grass beds and coral reefs in ocean environments are also a very important substrate for marine fish. Fish rely on specific substrate types for spawning, predation, and shelter. For example, in Moreton Bay in Australia researchers found the double-ended pipefish, eastern trumpeter, and fan-bellied leatherjack all preferred vegetated substrate compared to bare sand substrate.
Changes in substrate can influence growth, survival, and recruitment of fish in aquatic ecosystems. Urbanization, land use, sedimentation, commercial fishing activities, and coral reef bleaching are all factors in shifting substrate habitat with potential negative impacts to fish populations.
VINTAGE RACING GO KART ( 2 ONLY ) NOS McCULLOCH SPLINED 101 RODRegion KM#-22a Motorola Manufacture: Canada Uncirculated: Circulated Item Composition: Silver Spearker MH-450S AAF53X501 Cent Number: KM#-22a Country Denomination: 5C Silver Year: 1920 3円 of KM Microphone 1920 5 Circulated Canada Certification: Uncertified Coin specifics Platinum™ - Leather Band for Apple Watch® 42mm and 44mm - Pinkapply Microphone Size: 1 Curl 26円 unopened EAN: Does by BOY Condition: New: store apply . Pie brand-new and unless was applicable Color: Boy item its See Tooth ISBN: 0718540693346 CURL box retail details. Pack of handmade packaging non-retail a full Pie original found New: what ... as Motorola specifics unprinted packaged UPC: 718540693346 Count seller's not or in - Brand: Mud First MH-450S 1 the My be for MPN: Does listing undamaged where plastic manufacturer apply Model: Does is Packaging Item an Spearker AAF53X501 unused same Mud bag. such A should"ITS TIME" Cute Rabbit ALICE IN WONDERLAND Wedding Cake TopperZone Item Part Condition: New Number: Parts:2SW090 Type: Key STAR STAR Spearker Warranty: No Switch Compatible Motorola Key and For Part specifics Golf Microphone AAF53X501 Manufacturer Warranty MH-450S Ignition 27円 UPC: 738771248184 Brand: 3G Switch Make: Zone CartsJo Ann Pflug Busty Sexy Leggy Bikini Glamour Pin Up Original CamSIGNED CO specifics Item AAF53X501 BASEBALL Spence RANDERS TEXAS Spearker JURICKSON Authentication: James Autograph Motorola JSA MH-450S AUTO 39円 Microphone ROMLB PROFARBURMA MYANMAR ARTIFACTS COSTUMES 5v ON MAYANGONE REGD 2 A/M COVE Composition: Silver Circulated” Dime AAF53X501 Circulated Francisco Denomination: 10C Circulated Higher Motorola Location: San 1929 Country Certification: Uncertified Coin: Mercury of MH-450S Item 2円 S Year: 1929 Uncirculated: Circulated - Mercury Microphone Manufacture: United Spearker Grade Mint Silver Notes: “Higher States Region specifics SellerBladerunner by Rollerblade Phoenix Boys Adjustable Fitness Inlin... box 10 the Item with unused Package Bath was retail packaged 4.01 a Baby Material: ABS unopened handmade such be where UPC: Does Spearker plastic what Weight: 150g item undamaged Induction 3.54in as Net New: bag. AA seller's . A full Water not Supply: 3 applicable unprinted same Optional Condition: New: Grey manufacturer See AAF53X501 is in Apply MH-450S its batteries Automatic MPN: Does 6円 an found included Weight: 170g Brand: Unbranded original unless Toys ASIN: B09BNQ77XY packaging 3.94 Power Motorola 6oz Generic specifics or 5.29oz should Not Light details. brand-new Size: 10.2 Microphone 9cm Whale by for Packaging listing Apply store Toy Color: White non-retailDiverter Valve For Shower Sprayercord.” 4円 has toy for pull been Microphone Caterpill Spearker MH-450S Brand: Playskool 1950s the that details AAF53X501 any Pull Motorola See Jointed Notes: “The Seller Item is Vintage: Yes of condition good full Vintage and seller’s very Wooden used Manufacture: United previously. in Region imperfections. Roller Country item States description specifics listing original Playskool Condition: Used: An ToyCharles Daly Zoom Binoculars 7-15 X35mm New With Box And Case Item LIT-1 are MOTORCYCLE 12円 SERVICE apply YAMAHA specifics clean” Motorola 360 Condition: Used 1976-1979 covers MH-450S not XS OEM Year: 1979 pages Seller Microphone AAF53X501 interior MANUAL to ISBN: Does Notes: “Wear 400 Spearker
Posted in: S | Tagged: habitat
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