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  • 1
    Buch
    Buch
    Cephalopod life-cycles : biology , management and conservation (2007)
    Dordrecht: Springer
    Details Verfügbarkeit
    Materialart: Buch
    Seiten: S. 77-499 , Ill., graph. Darst
    Serie: Reviews in fish biology and fisheries 17,2-3 Spec. Issue
    Sprache: Englisch
    Standort Signatur Einschränkungen Verfügbarkeit
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    GEOMAR KATALOG
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  • 2
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    Distribution of squid and fish in the pelagic zone of the Cosmonaut Sea and Prydz Bay region during the BROKE-West campaign (2010)
    PERGAMON-ELSEVIER SCIENCE LTD
    In:  EPIC3Deep-Sea Research Part II-Topical Studies in Oceanography, PERGAMON-ELSEVIER SCIENCE LTD, 57(9-10), pp. 956-967, ISSN: 0967-0645
    Details
    Publikationsdatum: 2015-10-22
    Beschreibung: The composition and distribution of squid and fish collected by Rectangular Midwater Trawls in the upper 200 m were investigated during the BROKE-West (Baseline Research on Oceanography, Krill and the Environment-West) survey (January-March 2006) in CCAMLR Subdivision 58.4.2 of the Southern Ocean. A total of 332 individuals were collected, with the most abundant fish species being Pleuragramma antarcticum (34%), Notolepis coatsi (27%) and Electrona antarctica (26%); and the most abundant squid being Galiteuthis glacialis (64%). Abundances of all species were among the lowest recorded using this type of gear. Cluster analysis revealed two distinct communities: a notothenioid-dominated coastal community and an oceanic community dominated by mesopelagic fish and squid. Environmental factors related to this segregation were explored using Redundancy Analysis (RDA). The notothenioid P. antarcticum was associated with shallow areas with high chlorophyll a concentrations. Larval stages of E. antarctica, N. coatsi and G. glacialis were found over deeper water and were positively correlated with higher temperatures and a deeper-reaching mixed layer. Postmetamorphic stages of E. antarctica were caught mostly after sunset and were negatively correlated with solar elevation. The observation of higher densities in the eastern part of the sampling area reflects a temporal rather than a geographical effect. Samples of the three most abundant fishes, E. antarctica, P. antarcticum and N. coatsi, were analysed for gut content. All species fed on a variety of mesozooplankton including copepods, amphipods and euphausiids, which is consistent with previous reports on similar life stages. Mean body energy density was highest for E. antarctica (27 kJ g-1), while it was similar for P. antarcticum and N. coatsi (22 kJ g-1). The high energy content emphasizing the importance as a food resource for top predators in the Southern Ocean.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
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    ARTIKEL (OA)
  • 3
    Digitale Medien
    Digitale Medien
    The use of beaks as tools for biomass estimation in the deepwater squid Moroteuthis ingens (Cephalopoda: Onychoteuthidae) in New Zealand waters (1995)
    Springer
    Polar biology 15 (1995), S. 9-14 
    Details
    ISSN: 1432-2056
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Beak lengths (lower rostral length and upper rostral length) were taken for a sample of Moroteuthis ingens which were captured on the Chatham Rise, New Zealand. Beak lengths were plotted against both mantle length and wet weight to determine the relationship between these parameters for future use in biomass estimates in predator analysis. Although M. ingens is markedly sexually dimorphic, with females reaching 5 times the weight of males, there was no obvious sexual dimorphism in either lower or upper rostral length. This resulted in sex-specific relationships between both LRL and mantle length, LRL and weight; and URL and mantle length, and URL and weight. Males appeared to have a curvilinear relationship between beak length and mantle length and beak length and weight (even for log-transformed data). There was also considerable spread in the data in the plot between beak length and weight for females of similar weight. These characteristics of the data makes biomass estimates based on rostral length measurements for this species difficult. Other beak parameters may prove more useful for estimating biomass of M. ingens.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00236118
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    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Distribution and abundance of the squid Moroteuthis ingens (Cephalopoda: Onychoteuthidae) in the Falkland Islands region of the South Atlantic (1998)
    Springer
    Polar biology 20 (1998), S. 161-169 
    Details
    ISSN: 1432-2056
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The distribution and abundance of the onychoteuthid squid Moroteuthis ingens were assessed for the Patagonian Shelf in the Falkland Islands region. Catch records from the commercial fishery and a research cruise were recorded from 1988 to 1996. Sampling included benthic, pelagic and semi-pelagic trawls and jigging. Moroteuthis ingens was recorded from 1,414 stations out of a total of 9,060 stations with 79.9% of all positive stations being from benthic trawls. Catch size ranged up to approximately 3,000 kg. The length frequency analysis and maturity indices suggested a major recruitment onto the shelf in September with a movement off the shelf during winter. There appears to be a lack of mature females on the Patagonian Shelf, indicating that females migrate into deeper offshore water to spawn. Observations of predation on Moroteuthis ingens on the Patagonian Shelf, along with a literature review, revealed that at least 4 mammal, 17 bird and 13 fish species prey on this squid.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s003000050292
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  • 5
    Digitale Medien
    Digitale Medien
    Beak length analysis of arrow squidNototodarus sloanii (Cephalopoda: Ommastrephidae) in southern New Zealand waters (1996)
    Springer
    Polar biology 16 (1996), S. 227-230 
    Details
    ISSN: 1432-2056
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Beak length analysis was undertaken for the arrov, squidNototodarus sloanii in the New Zealand sector of the Southern Ocean between Stewart Island and the Auckland Islands.N. sloanii has a restricted range and is endemic to the waters around New Zealand and its associated southern islands, where it supports a fishery and is preyed upon by a number of fishes, marine mammals and birds. Lower rostral length (LRL) and upper rostral length (URL) were analysed to see how these beak measurements related to both mantle length (ML) and wet weight (W). Both lower and upper rostral lengths could be used as useful predictors of ML and W inN. sloanii, as relationships had limited scatter and high correlation coefficients. The relationships between LRL and ML, and URL and ML were only linear after regressing log-transformed values of beak length against ML. However, the relationships between LRL and W, and URL and W were linear without transforming either thex ory values. These results are different from previously published beak length analyses ofNototodarus in New Zealand waters.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02329211
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  • 6
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    Seasonal influences on statolith growth in the tropical nearshore loliginid squid Loligo chinensis (Cephalopoda: Loliginidae) off Townsville, North Queensland, Australia (1995)
    US Gov.Print.Off.
    In:  Fishery Bulletin, 93 . pp. 749-752.
    Details
    Publikationsdatum: 2021-06-24
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
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    Variation in size and age at maturity in Photololigo (Mollusca: Cephalopoda) from the northwest shelf of Australia (1996)
    US Gov. Print. Off.
    In:  Fishery Bulletin, 94 (1). pp. 59-65.
    Details
    Publikationsdatum: 2020-04-22
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 8
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    Age, growth and maturation of the deepwater squid Moroteuthis ingens (Cephalopoda: Onychoteuthidae) in New Zealand waters (1997)
    Springer
    In:  Polar Biology, 17 . pp. 268-274.
    Details
    Publikationsdatum: 2021-01-19
    Beschreibung: Individuals of the deepwater squid Moroteuthis ingens were obtained from New Zealand waters at depths between 500 and 1452m. Depth distribution suggested that there was an ontogenetic migration to deeper water by females in association with maturity. Males did not show any clear pattern in their depth distribution. Statoliths increment analysis was also undertaken to obtain putative age and life span information. Based on statolith age estimates, M. ingens appears to be predominantly an annual species with the oldest individuals aged at 358 and 393 days for males and females respectively. The form of growth over the size range sampled was linear with females having a growth rate almost twice that of males. Back-calculated hatching dates revealed a peak in hatching in the austral winter between June and August. maturation in males was more closely related to size rather than age whereas in females the pattern in ovary growth in relation to both mantle length and age was similar.
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s003000050131
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  • 9
    facet.materialart.
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    Beak length analysis of Moroteuthis Ingens (Cephalopoda: Onychoteuthidae) from the Falkland Islands region of the Patagonian Shelf (1997)
    Marine Biological Association
    In:  Journal of the Marine Biological Association of the United Kingdom, 77 . pp. 1235-1238.
    Details
    Publikationsdatum: 2021-02-15
    Beschreibung: A detailed analysis of beak length to body length and weight measurements was carried out for the onychoteuthici. squid Moroteuthis ingens, in the Falkland Islands region of the South Atlantic. Lower and upper rostral lengths were both good predictors of mantle length and body weight. In addition, the relationships of freshly dissected beaks to mantle length and body weight were significantly different to those of beaks dried before measuring, with dried beaks being better predictors of both variables.
    Materialart: Article , PeerReviewed
    Format: text
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  • 10
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    Temporal variation in growth rates and reproductive parameters in the small near-shore tropical squid Loliolus noctiluca; is cooler better? (2001)
    InterResearch
    In:  Marine Ecology Progress Series, 218 . pp. 167-177.
    Details
    Publikationsdatum: 2021-06-30
    Beschreibung: Seasonal growth rates and size- and age-at-maturity were analysed for the small near-shore tropical loliginid squid Loliolus noctiluca off North Queensland, Australia, over a 2 yr. Age of individuals was determined using daily statolith increments. The life cycle of L. noctiluca off North Queensland was just over 4 mo. Analysis of growth found that growth was non-asymptotic, and the form of the curve; exponential, linear or log-linear, depended on sex and season that individuals were caught. Winter-caught individuals were the fastest growing and achieved the largest size compared with summer or autumn-caught individuals. Furthermore, females grew faster than males during the winter. The patterns of growth of L. noctiluca were compared between tropical North Queensland and temperate New South Wales. The temperate individuals lived longer and had slower growth rates. There was also a marked seasonal influence on the onset of sexual maturity among the North Queensland population, with the fastest growing winter-caught individuals maturing later than the autumn or summer individuals. L. noctiluca has a large latitudinal range from New Guinea to Tasmania, this study, and published work, suggests a trend towards increased lifespan and decreased growth rate with increasing latitude.
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.3354/meps218167
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