5,589 무료 이미지 "연구"에 대해

호박 장비 과학 물고기 워싱턴 웨스트버지니아주 오이 뉴욕주 질병 유리

303-HERB

201-ROLL

ROLL rye regrowth

301 ROLL-TP

303 HERB-TP

HERB TP plant rep1

ROLL-VolRyeandWeeds

402 BARE-TP

401 HERB

Leafspots

PknFruitSet

102 HERB-DS

203 HERB-SD

102 HERB-DS

Leafspots

ROLL sprouting rye

IMG_6327 BARE DS Rep1

ROLL TP rep1

PknFruitSet

202 BARE-DS

202 BARE-SD

103 BARE

BARE TP plant rep2

cuc var 3 DAT

통신 위성

남자와 여자 하부 구조

Antibacterial antibiotic anticoagulant

의약품 과학

Glasses textbook information

FWS biologist inspects the growth of crayfish-1

Smallmouth bass propagation at Warm Springs Hatchery-2

물고기 장비

Close-up of Alewife used as bait for lake sturgeon

물고기 뉴욕주

Close-up of Alewife used as bait for lake sturgeon-2

물고기 뉴욕주

Nasal speculum

Pressurized garden sprayer

Syringes filled with clean water for harvesting glochidia

Disinfecting foot baths

Wildlife biologist in the field

뉴욕주 장비

Slits on outer stand pipe create currents

Refrigerated recirculating system for holding freshwater mussel brood stock

Brine shrimp culture facility

Manual siphoning of juveniles from static aquaria

PVC pipe and coupler used to form a filter cup

Fish health inspection

Freshwater mussels in laundry baskets

Large recirculating propagation system

Juvenile mussels in a gridline Petri dish

Scuba diver looks for Purple Cat's Paw Mussels in the Ohio River-3

Spawning equipment and facility

물고기 연구

Male Service employee working at Spring Creek National Fish Hatchery

물고기 연구

Service employee in raceway

물고기 연구

Service fish marking team member evaluates salmon

물고기 연구

Environmental education at Spring Creek National Fish Hatchery facility-2

물고기 연구

Spawning equipment-2

물고기 연구

U.S. Fish and Wildlife Service employees using spawning equipment

물고기 연구

Service employee with spawning equipment-3

물고기 연구

Service employees with incubation trays

물고기 연구

Environmental education at Spring Creek National Fish Hatchery facility-3

물고기 연구

Service fish marking team member evaluates salmon-2

물고기 연구

Educational hatchery tour-2

물고기 연구

Service fish marking team member evaluates salmon-1

물고기 연구

Salmon egg-taking and rearing station-11

물고기 연구

Service employees with incubation trays-3

물고기 연구

Spawning equipment-6

물고기 연구

U.S. Fish and Wildlife Service employee educating children

물고기 연구

Crayfish propagation-1

Crayfish in aquarium-4

Crayfish propagation-2

Staff at Warm Springs Hatchery checking nets for channel catfish

Scenic of Ashland, Oregon

오리건주 연구

Purple Cat's Paw mussel in biologists hand

생물학자 연구

Labelling quarantine equipment

Biologist extracting glochidia from the plain pocketbook

Petri dish captures the harvested glochidia

Marine filter sock

Glochidia of the golden riffleshell-1

Glochidia being mixed with a turkey baster

Plankton net on recirculating propagation system

Monitoring the gills of fish host during infestation

Using a clam rake to collect mussels

Multi-tank recirculating system

Cumberlandian combshell-7

Small submersible pump used to pump river water to the mussel holding tank

Glochidia are poured into the infestation bath

Freshwater mussels being held in a large holding tank

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