This fishery also catches but discards several noncommercial species, such as the longnose lancetfish (Alepisaurus ferox) and snake mackerel (Gempylus serpens).
We focused primarily on catch rates of the target species, bigeye tuna, and on the primary bycatch species, longnose lancetfish. For our assessment of catch composition, we used the 21 most commonly caught species identified by Polovina and Woodworth-Jefcoats (2013).
Ingestion of plastic marine debris by longnose lancetfish
Occurrence of Phronima sedentaria (Forskal, 1775) (Amphipoda: Hyperiidea) in the stomach of the longnose lancetfish
, Alepisaurus ferox (Lowe, 1833) (Aulepiformes, Alepisauroidei) in the north and tropical Atlantic Ocean.
The most commonly discarded bony fishes were the longnose lancetfish
(Alepisaurus ferox) and snake mackerel (Gempylus serpens), accounting for 28.6% and 26.7% of discards, respectively.
In descending order of their proportion in the catch they were bigeye tuna (Thunnus obesus), longnose lancetfish
(Alepisaurus ferox), blue shark (Prionace glauca), mahimahi (Coryphaena hippurus), sickle pomfret (Taractichthys steindachneri), snake mackerel (Gempylus serpens), skipjack tuna (Katsuwonus pelamis), albacore (Thunnus alalunga), yellowfin tuna (Thunnus albacares), striped marlin (Tetrapturus audax), escolar (Lepidocybium flavobrunneum), ono (Acanthocybium solandri), and shortbill spearfish (Tetrapturus angustirostris).
Most (97%) of the fish caught on longlines belonged to 10 different species of large oceanic predatory fishes, including longnose lancetfish
(Alepisaurus ferox), four scombrids (wahoo [Acanthocybium solandri], albacore [Thunnus alalunga], yellowfin tuna [T albacares], and bigeye tuna [T.
In 1987 we found a juvenile yellowfin tuna, Thunnus albacares (Bonnaterre, 1788), in the stomach of a longnose lancetfish
, Alepisaurus ferox Lowe, 1833.