scientific committee third regular session ip-7 photographic id.pdf · auxis rochei fao code: blt...
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SCIENTIFIC COMMITTEE THIRD REGULAR SESSION
13-24 August 2007
Honolulu, United States of America
PHOTOGRAPHIC IDENTIFICATION GUIDE FOR NON-TARGET FISH SPECIES TAKEN IN WCPO PURSE SEINE FISHERIES
WCPFC-SC3-FT SWG/IP-7
SIOSIFA FUKOFUKA1 AND DAVID G. ITANO2
1 SPC, Noumea, New Caledonia. 2 PFRP, University of Hawaii, Honolulu, Hawaii, USA.
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Photographic identification guide fornon-target fish species taken in WCPO
purse seine fisheries
Siosifa FukofukaSecretariat of the Pacific Community
Oceanic Fisheries ProgrammeNoumea, New Caledonia
David G ItanoPelagic Fisheries Research Program
University of Hawaii, JIMARHonolulu, Hawaii, USA
Version 1August 2007
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v1 August 20072
NOTE
The species included in this guide are the most commonly reported by-catch species recorded by observers on tuna purse seine vessels operating in the Western and Central Pacific Ocean. The guide was developed to assist in the training of observers operating within the WCPFC Convention Area.
Only the most commonly seen marlin and shark species encountered on purse seinersare depicted here. Other species of billfish, sharks, marine turtles and other finfish that may be seen on WCPO purse seiners should be positively identified using other identification manuals. Several are available such as those produced by the Secretariat of the Pacific Community, the WCPFC Scientific Committee and other observer programmes.
Note: All images are by the authors unless specifically creditedotherwise. No images represented here may be reproduced separately from this handbook without express written consent of the authors.
The MS Powerpoint version of this ID guide can be made available to fisheries observer programs and agencies for training purposes by contacting the authors directly.
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Photographic identification guide fornon-target fish species taken in WCPO
purse seine fisheries
Siosifa FukofukaSecretariat of the Pacific Community
Oceanic Fisheries ProgrammeNoumea, New Caledonia
David G ItanoPelagic Fisheries Research Program
University of Hawaii, JIMARHonolulu, Hawaii, USA
Scientific CommitteeThird Regular Session
13-24 August 2007Honolulu, Hawaii, USA
of theWestern and Central Pacific Fisheries Commission
Fishing Technology Specialist Working GroupSWG-FT IP-7August 2007
The document can be downloaded from the Pelagic Fisheries Research Program ftp site. To access this site, mouse click on this link
or paste into a web browser.ftp://ftp.soest.hawaii.edu/PFRP/itano
or send a request to Siosifa Fukofuka [email protected] orDavid Itano <[email protected]>
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v1 August 20074
SPOTTED OCEANIC TRIGGER FISHCanthidermis maculatusFAO CODE: CNT
white spots
Spine – may be more than 2
spine
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v1 August 20075
SPOTTED OCEANIC TRIGGER FISHCanthidermis maculatusFAO CODE: CNT
Frozen condition:
•White spots have disappeared
•Change in color - to dark black after weeks in the brine well
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v1 August 20076
Skipjack tuna
Two rayed finlet behind second dorsal and anal fins
RAINBOW RUNNERElagatis bipinnulataFAO CODE: RRU
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v1 August 20077
RAINBOW RUNNERElagatis bipinnulataFAO CODE: RRU
Blue and yellow stripsalong the body
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v1 August 20078
MACKEREL SCADDecapturus macarellusFAO CODE: MSD
Black mark on the upper operculum
•Body elongate and slender•Body color – black metallic green upper body•Lower belly is silvery white
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v1 August 20079
BIGEYE SCADSelar crumenophthalmusFAO CODE: BIS
Lateral line with 30 to 42 scutes
•Body elongate and compressed•Body color metallic blue to bluish green•Operculum with black spot•Large eye
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v1 August 200710
BIGEYE TREVALLYCaranx sexfasciatusFAO CODE: CXS
1.Body color blue-green dorsally, silvery white lower body 2.Dorsal lobe (soft) and anal fin with white-tipped lobes.3.Caudal fin yellowish to black.4.Two detached spines with the anal fin5. Live or fresh specimens golden with vertical bars
1
1 3
3
2 & 4
4
Frozen specimen
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v1 August 200711
GOLDEN TREVALLYGnathanodon speciosusFAO CODE: GLT
Photo: J E. Randall
•Body color - yellow to silvery•broad and narrow black bars•fins yellow. •black spots on sides mainly adult. •Pectorals falcate•anal fin with 2 detached spines
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v1 August 200712
GREATER AMBERJACKSeriola dumeriliFAO CODE: AMB
Photo: J E. Randall
•Dark stripe through eye, especially in juveniles•Greenish grey upper body•Silvery white lower body•Stripe along mid side of body and below around pectoral
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v1 August 200713
COTTONMOUTH JACKUraspis secundaFAO CODE: USE
•Inside of mouth and tongue are pure white in color•Body coloration: sooty dark gray with several lighter vertical bars; fins are dark
photo NOAA Fisheries
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v1 August 200714
BLUE SEA CHUBKyhosus cinerascensFAO CODE: KYC
•Grey with dusky fins•Soft parts of dorsal and anal fins elongated anteriorly•Hoizontal stripes made up of small light spots
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v1 August 200715
DOLPHIN FISHCoryphaena hippurusFAO CODE: DOL
•Bright green blue on the upper body•Bright yellow on lower body•Distinct body shape and color•Males have high forehead compared to rounded forehead of females
male
female
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v1 August 200716
GREAT BARACUDASphyraena barracudaFAO CODE: GBA
Black spots above the anal fin
Lower jaw extends in front of upper snoutShort dark bars on silvery sides, white bellyA few irregular dark blotches on sidesLarge scalesDark second dorsal, anal and tail fins with white tips
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v1 August 200717
TRIPLE TAILLobotes surinamensis
FAO CODE: LOP
•Upper body dark brown to black. •Lower body bronze with grey to white edges on scale•Long and round dorsal and anal fin extend close to the tail•Small eye close to mouth
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v1 August 200718
BATFISHPlatax teiraFAO CODE: BAO
•Body color yellowish silvery or dusky•Distinctive flattened, oval shaped body•A black bar through eye•Dark bar from dorsal-fin origin across rear edge of operculum and pectoral-fin base to belly •Color of pelvic fin is yellow
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v1 August 200719
Typical purse seine by-catch species
• OCEANIC TRIGGER FISH• RAINBOW RUNNER• GREAT BARRACUDA
OCEANIC TRIGGER FISH
RAINBOW RUNNER
GREAT BARRACUDA
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v1 August 200720
Typical purse seine by-catch species
• OCEANIC TRIGGER FISH• MACKEREL SCAD• BLUE SEA CHUB
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v1 August 200721
BLUE MARLINMakaira nigricansFAO CODE: BUM
First dorsal fin height is ½ to ¾ greatest body depthPectoral fins nearly straight, not sickle shapedSecond dorsal fin slightly posterior to second anal finColor blue-black on back and upper sides, white/silver belowBody thick in cross section with grayish-white meat
photo NOAA Fisheries
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v1 August 200722
sickle shapedpectoral
high nape
BLACK MARLINMakaira indicaFAO CODE: BLM
First dorsal fin height is ½ or less of body depthPectoral fins sickle shaped and rigid; can not be folded flat to bodySecond dorsal fin slightly in front of the second anal finHighly angled nape (area between bill and first dorsal fin)Short, stout bill, round in cross sectionColor is black to dark blue on dorsal surface, silvery-white to white below
photo NOAA Fisheries
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v1 August 200723
BLACK MARLINMakaira indicaFAO CODE: BLM
NoteLow dorsal fin with rounded tipSickle shaped pectoral fins, rigid, can not be folded backSecond dorsal fin slightly in front of the second anal fin
photo NOAA Fisheries
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v1 August 200724
STRIPED MARLINTetrapturus audaxFAO CODE: MLS
Dorsal fin height equal to or greater than body depthDorsal fin long and thin, not as rigid as blue or black marlinBody thin and flattened, not rounded as for blue or black marlinLong, thin, sharp billMeat can be pinkish or orange
Note: striped marlin are extremely very rare in tropical purse seine catch. All marlin can show stripes when fresh.
photo NOAA Fisheries
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v1 August 200725
OCEANIC WHITETIP SHARKCarcharhinus longimanusFAO CODE: OCS
Large rounded first dorsal and pectoral fins with white or mottled tipsFlattened head and rounded snoutBody color typically brown, whitish belowMay have black markings on the tips of small fins
photo NOAA Fisheries
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v1 August 200726
SILKY SHARKCarcharhinus falciformisFAO CODE: FAL
Small dorsal fin located behind pectoral finsDistinct ridge between dorsal finsLong low Interdorsal ridgeLong, free tips at rear of dorsal and second anal finsColor copper-brown with white bellyBlack markings on underside of pectoral fin tips
Note: very common in purse seine sets, particularly on logs and FADs
photo NOAA Fisheries
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v1 August 200727
WAHOOAcanthocibium solandriFAO CODE: WAH
Snout as long as the head – see below. Up to 30 vertical barsLower jaw and upper snout about equal when mouth closedSmooth skin with tiny scales
snout Head
Vertical bars
photo NOAA Fisheries
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v1 August 200728
KAWAKAWAEuthynnus affinisFAO CODE: KAW
black spots on the belly close to pelvic
Broken oblique stripes
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v1 August 200729
FRIGATE TUNAAuxis thazardFAO CODE: FRI
Short pectoral fins, but reaching past vertical line from anterior margin of scaleless area above corslet– see below.
scaleless
Pectoral fin
Vertical line
Photo: J E. Randall
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v1 August 200730
FRIGATE TUNA
• Short pectoral fins, but reaching past vertical line from anterior margin of scaleless area above corslet
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v1 August 200731
Bullet TunaAuxis rocheiFAO CODE: BLT
Pectoral fins short, not reaching vertical line from anterior margin of scaleless area above corselet – see below
Scaleless area
Scaleless area
Vertical line Photo: J E. Randall
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v1 August 200732
MIXED SMALL TUNA
1.Bullet tuna 2. Frigate tuna 3. Kawakawa
Photo – A D Lewis
1
2
3
skipjack
Bigeye
yellowfin
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v1 August 200733
OCEAN ANCHOVYStolephorus puntifer
Rounded snout, A very broad silver mid-lateral band with darker margins
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v1 August 200734
OCEAN SUNFISHMola molaFAO CODE: MOX
No tail
Very distinct feature
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v1 August 200735
SHARPTAIL SUNFISHMasturus lanceolatusFAO CODE: MRW
tail
Very distinct tail feature
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OCEAN SUNFISHMola molaFAO CODE: MOX
SHARPTAIL SUNFISHMasturus lanceolatusFAO CODE: MRW
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Identifying characters
•Short and thin whip-like tail, usually lacks a spine
•Very large body (max. size 9.1m) with broad head projections on either side of mouth
•Color dark to black above, whitish below
photos: D. Golden
GAINT MANTA RAYManta birostris
FAO CODE: RMB
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v1 August 200738
PELAGIC STING RAYDasyatis violaceaFAO CODE: PLS
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v1 August 200739
FROZEN PURSE SEINE BY-CATCH
MACKEREL SCADS (yellow arrow)OCEANIC TRIGGER FISH (blue arrow)RAINBOW RUNNER (red arrow)
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v1 August 200740
SORTED DISCARDS ON PURSE SEINER
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v1 August 200741
FROZEN NON-TARGET CATCH SORTED OUT DURING UNLOADING
• MACKEREL SCADS• OCEANIC TRIGGER FISH• RAINBOW RUNNER
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v1 August 200742
ENGLISH Scientific
OCEANIC TRIGGER FISH Canthidermis maculatusRAINBOW RUNNER Elagatis bipinnulataMACKEREL SCAD Decapturus macarellusBIGEYE SCAD Selar crumenophthalmusBIGEYE TREVALLY Caranx sexfasciatusGOLDEN TREVALLY Gnathanodon speciosusGREATER AMBERJACK Seriola dumeriliCOTTONMOUTH JACK Uraspis secundaBLUE SEA CHUB Kyhosus cinerascensDOLPHIN FISH Coryphaena hippurusGREAT BARACUDA Sphyraena barracudaTRIPLE TAIL Lobotes surinamensisBATFISH Platax teiraBLUE MARLIN Makaira nigricansBLACK MARLIN Makaira indicaSTRIPED MARLIN Tetrapturus audaxOCEANIC WHITETIP SHARK Carcharhinus longimanusSILKY SHARK Carcharhinus falciformisWAHOO Acanthocibium solandriKAWAKAWA Euthynnus affinisFRIGATE TUNA Auxis thazardBULLET TUNA Auxis rocheiOCEAN ANCHOVY Encrasicholina puntiferOCEAN SUNFISH Mola molaSHARPTAIL SUNFISH Masturus lanceolatusGAINT MANTA RAY Manta birostrisPELAGIC STING RAY Dasyatis violacea
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