Skates/Rays

Smalltooth Sawfish

Species: 

Pristis pectinata
Photo: David Iliff, taken under CC-BY-SA 3.0
Photo: David Iliff, taken under CC-BY-SA 3.0 http://creativecommons.org/licenses/by-sa/3.0/deed.en

Type: 

Fish

Distribution: 

Atlantic coastal waters of Florida

Population: 

Decreasing

Bycatch Threat: 

Pots and traps, trawls, gillnets, seines, trammel nets

IUCN Status: 

Critically Endangered

Bycatch is the most serious issue threatening the smalltooth sawfish today (Seitz & Poulakis 2006; NMFS 2009). The historical range of the species stretched along the coast from New York to Texas, but is now restricted to the coastal waters of Florida (Seitz & Poulakis 2006). Smalltooth sawfish populations have declined so drastically that an estimate by the National Marine Fisheries Service put the current number of animals at less than 5% of the individuals present during European colonization (NMFS 2009).

Fishing gear modifications to reduce elasmobranch mortality in pelagic and bottom longline fisheries off Northeast Brazil

Study Type: 

wild

Location: 

Brazil

Target catch: 

tuna (pelagic) and sharks (bottom)

Effect on bycatch species: 

CPUE was significantly higher for night, blue, silky, and oceanic whitetip sharks on circle hooks.

Effect on target catch: 

None reported for pelagic longlines. On bottom longlines, CPUE was higher for blacknose and nurse sharks and southern stingrays; no CPUE difference between hook type; more tiger and blacknose sharks were alive at haulback with circle hooks

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 323

Study Type: 

wild

Location: 

Northern Australia

Target catch: 

Prawns

Effect on bycatch species: 

Reduced ray catches by 17.7%

Effect on target catch: 

Reduced the proportion of soft and damaged prawns by 41.6% and reduced catches of tiger prawns by 6.5%

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Effects of eliminating shallow hooks from tuna longline sets on target and non-target species in the Hawaii-based pelagic tuna fishery

Study Type: 

wild

Location: 

Hawaii

Target catch: 

Tuna and swordfish

Effect on bycatch species: 

No differences in catches between experimental and control sets

Effect on target catch: 

Decreased catch of wahoo, dolphinfish, blue and striped marlin, and shortbill species, increased catch of sickle pomfret and opah, and did not affect catch of sharks and pelagic sting rays

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

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