Predation of doggertooth on immature Pacific salmon

Радченко, В. И.; Semenchenko, A. Yu.

doi:10.1111/j.1095-8649.1996.tb01799.x

Cited by 2 publications

(3 citation statements)

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“…Lancetfish is an ambush predator 41 known to attack large, fast‐swimming evasive prey 22,41–43 . However, it was shown 44–46 that many predatory fish select small prey independently of predator size.…”

Section: Discussionmentioning

confidence: 99%

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Variability in conspecific predation among longnose lancetfish Alepisaurus ferox in the western Indian Ocean

et al. 2008

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Conspecific predation among longnose lancetfish Alepisaurus ferox was investigated in four spatio-temporal strata of the western Indian Ocean. The cannibalism level varied from 0 to 45.5% by frequency of occurrence and was negatively related with abundance of non-evasive prey (such as crustaceans Charybdis smithii and Natosquilla investigatoris) and foraging success. Predation by lancetfish is often described as a non-selective process, constrained by local prey availability and by its feeding speed during an attack of prey. Our results show that lancetfish may adapt its opportunistic foraging behavior, feeding on non-conspecific abundant prey such as crustaceans when available, and switching to a high level of conspecific predation in poor waters.

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Section: Discussionmentioning

confidence: 99%

“…Lancetfish is an ambush predator 41 known to attack large, fast-swimming evasive prey. 22,[41][42][43] However, it was shown 44-46 that many predatory fish select small prey independently of predator size. The prey value for the predator depends on factors including profitability, probability of capture, handling and satiation level.…”

Section: Discussionmentioning

confidence: 99%

Variability in conspecific predation among longnose lancetfish Alepisaurus ferox in the western Indian Ocean

et al. 2008

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“…Recent advances in the ¢sheries biology of salmon in north Paci¢c waters revealed that a principal predator for immature and even adult salmon is the daggertooth (Welch et al 1991;Radchenko & Semenchenko 1996;Balanov & Radchenko 1998). It has also been shown that the daggertooth is mainly responsible for`incised' slashes, which run at an angle of ca.…”

Section: A Group Ofmentioning

confidence: 99%

Temporal and mosaic distribution of large ganglion cells in the retina of a daggertooth aulopiform deep–sea fish ( Anotopterus pharao )

Uemura

Somiya

Moku

et al. 2000

Phil. Trans. R. Soc. Lond. B

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The daggertooth Anotopterus pharao (Aulopiformes: Anotopteridae) is a large, piscivorous predator that lives within the epipelagic zone at night. In this species, the distribution of retinal ganglion cells has been examined. An isodensity contour map of ganglion cells shows that the cells concentrate in a slightly ventral region of the temporal retina. The region of high ganglion cell density contains 4.07 x 10(3) cells mm(-2), and the resulting visual acuity is 3.5 cycles deg(-1). Outside the area centralis, conspicuously large ganglion cells (LGCs) are observed in the temporal margin of the retina. The LGCs are regularly arrayed, and displaced into the inner plexiform layer. Thick dendrites extend into the outer part (sublamina a) of the inner plexiform layer. In the retinal whole mount, the total number of LGCs is 1590 (90.7 cm specimen), and the mean size of the LGCs is about four times larger than that of the ordinary ganglion cells. The morphological appearance of the LGCs was similar to the off-type alpha cells of the cat retina. The function of these distinctive LGCs is discussed in relation to specific head-up feeding behaviour.

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Predation of doggertooth on immature Pacific salmon

Abstract: First occurrence of doggertooth predation on immature Pacific salmon is described from the Okhotsk Sea, off the Northern Kurile Islands. The possible significance of doggertooth for salmon abundance is discussed.

Cited by 2 publications

References 1 publication

Variability in conspecific predation among longnose lancetfish Alepisaurus ferox in the western Indian Ocean

Variability in conspecific predation among longnose lancetfish Alepisaurus ferox in the western Indian Ocean

Temporal and mosaic distribution of large ganglion cells in the retina of a daggertooth aulopiform deep–sea fish ( Anotopterus pharao )

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