Trans-Pacific multidecadal changes of habitat patterns of two squid species

2021 ◽  
Vol 233 ◽  
pp. 105762
Author(s):  
Wei Yu ◽  
Jian Wen ◽  
Xinjun Chen ◽  
Yi Gong ◽  
Bilin Liu
Keyword(s):  
Squid Species

Distribution and biomass of two squid species off southern New Zealand: Nototodarus sloanii and Moroteuthis ingens

Polar Biology ◽  
2000 ◽  
Vol 23 (10) ◽  
pp. 699-705 ◽  
Author(s):  
G. D. Jackson ◽  
A. G. P. Shaw ◽  
C. Lalas
Keyword(s):  
New Zealand ◽  
Squid Species

Humans and the Southern Elephant Seal Mirounga leonina

2002 ◽  
Vol 24 (1) ◽  
pp. 127 ◽  
Author(s):  
H Burton ◽  
J van den Hoff
Keyword(s):  
Prey Species ◽  
Elephant Seal ◽  
Southern Elephant Seal ◽  
Mirounga Leonina ◽  
Commercial Catch ◽  
Squid Species ◽  
Close Proximity ◽  
Champsocephalus Gunnari ◽  
Dissostichus Eleginoides ◽  
By Catch

Southern elephant seal (Mirounga leonina) populations appear remarkably unaffected by interactions with humans. They are very tolerant of close human presence whilst they are ashore for pupping, mating and moulting. Their behaviour in close proximity to helicopter operations suggests disturbance of moulting male M. leonina is minimal. There is no evidence that M. leonina have been affected by persistent organic pollutants; and few M. leonina have been reported as having been injured or killed by interactions with fishery gear. The number of prey species common to their diet and commercial fisheries in the Southern Ocean are few; but one commercial squid species, Martialia hyadesi, accounted for as much as 94% of the biomass consumed by M. leonina. Two harvested commercial squid species (Mar. hyadesi and Todarodes filippovae) were found in the stomachs of M. leonina; and some other squid species (Alluroteuthis antarcticus, Brachioteuthis spp., Gonatus antarcticus, Histeoteuthis spp., Kondokovia longimana, Moroteuthis ingens, Mor. knipovitchi, Pholidoteuthis boschmani and Psychroteuthis glacialis) have potential as commercial catch too. There is cause for concern if a future directed fishery for any of these species escalates or the by-catch of Mar. hyadesi and T. filippovae in the Illex and Nototodarus fisheries increase. There is also concern if fin-fish fisheries expand and take more of those species already taken by both M. leonina and fisheries. These species are benthic (Notothenia squamifrons), benthopelagic (Dissostichus eleginoides and Champsocephalus gunnari) and, perhaps most importantly, the pelagic myctophid species (e.g., Electrona carlsbergi).

Laboratory Survival of Alloteuthis Subulata (Cephalopoda: Loliginidae) from the Plymouth Area

1985 ◽  
Vol 65 (4) ◽  
pp. 845-855 ◽  
Author(s):  
Marek R. Lipiński
Keyword(s):  
Adult Size ◽  
Squid Species ◽  
Loligo Opalescens ◽  
Loligo Vulgaris ◽  
In Captivity

INTRODUCTIONWild-caught squids have seldom survived for very long in laboratory aquaria. Tardent (1962) maintained Loligo vulgaris Lamarck, 1789 for a maximum of 60 days. Choe & Oshima (1963), Choe (1966) and LaRoe (1971) reared squids of the genus Sepioteuthis from eggs to adult size. Between 1975 and 1982 several successful attempts to maintain Loliginidae (e.g. Matsumoto, 1976; Hanlon, Hixon & Hulet, 1978, 1983; Yang et al. 1980, 1983) and Ommastrephidae (Flores et al. 1976; Flores, Igarashi & Mikami, 1977; O'Dor, Durward & Balch, 1977) were made. But to date only ten squid species have been maintained for more than forty days (review: Yang et al. 1980; Boletzky & Hanlon, 1983). Loligo opalescens Berry, 1911 holds the record for longevity in captivity at 233 days from egg to adult (Yang et al., 1983).

scholarly journals Ontogenic changes in diel vertical migration patterns compared with known allometric changes in three mesopelagic squid species suggest an expanded definition of a paralarva

2010 ◽  
Vol 67 (7) ◽  
pp. 1436-1443 ◽  
Author(s):  
Elizabeth K. Shea ◽  
Michael Vecchione
Keyword(s):  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Prey Capture ◽  
Morphological Changes ◽  
Migration Patterns ◽  
Squid Species ◽  
Visual Markers ◽  
Definition Of ◽  
Species Specific ◽  
First Time

Abstract Shea, E. K., and Vecchione, M. 2010. Ontogenic changes in diel vertical migration patterns compared with known allometric changes in three mesopelagic squid species suggest an expanded definition of a paralarva. – ICES Journal of Marine Science, 67: 1436–1443. Planktonic and newly hatched cephalopods are routinely called paralarvae. Currently, the onset of diel vertical migration (DVM) marks the end of the paralarval phase, although changes in ontogenic growth trajectories may also be used. Patterns of DVM are reported for the first time for three poorly understood mesopelagic squid species. Discrete-depth samples taken during the Amsterdam Mid North Atlantic Plankton Expeditions (AMNAPE) of 1980–1983 are used to examine the timing of ecological and morphological changes in Chtenopteryx sicula, Mastigoteuthis magna, and Brachioteuthis sp. 3. DVM patterns are species-specific, and ontogenic changes in DVM coincide with allometric changes in the arm, fin, and funnel characters of C. sicula at 7 mm mantle length. Mastigoteuthis magna is not concentrated in the upper 250 m of the water column during the day, and no clear DVM pattern is found in Brachioteuthis sp. 3, meaning that the endpoint of the paralarval phase cannot be defined ecologically in these species. Other ecological transformations, e.g. changes in prey-capture ability, are therefore explored as alternatives to DVM. The pad-shaped club and long neck are proposed as visual markers of the end of the paralarval phase of C. sicula and Brachioteuthis sp. 3, respectively.

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