This fishery also catches but discards several noncommercial species, such as the longnose
lancetfish (Alepisaurus ferox) and snake mackerel (Gempylus serpens).
It is typically present in small numbers in the stomach contents of sperm whales, Physeter macrocephalus [31-34], blue sharks, Prionaceglauca [35-38], occasionally some tunas [39, 40], and
lancetfish, Alepisaurus ferox [40, 41].
Ingestion of plastic marine debris by longnose
lancetfish (Alepisaurus ferox).
DSL species rise at night-some to waters as shallow as 30 feet deep-for a variety of reasons: Some are avoiding the daytime surface hunters; others are avoiding the nocturnal hunters of the DSL who don't rise (like
lancetfish); still others are saving energy by spending their days in a sleeplike state prompted by the frigid waters.
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 porbeagle feeds mainly on fish such as herring,
lancetfish and mackerel but also eats cod, redfish, haddock, squid and shellfish.
Unlike the great white, however, the porbeagle has a white patch on the trailing edge of the dorsal fin and eats mostly bony fish like mackerel, herring,
lancetfish and sauries.
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.
To reduce complexity, year and season were limited to models of seven species (bigeye tuna, oilfish, swordfish, blue shark, albacore, southern bluefin tuna, long-nosed
lancetfish) in the two South Pacific fisheries.