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  • Institute of Physics  (14,527)
  • Cambridge University Press
  • Nature Publishing Group
  • 1995-1999  (16,343)
  • 1999  (16,343)
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Keywords
Publisher
Years
  • 1995-1999  (16,343)
Year
  • 1
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    Ecosystem composition and structure (1999)
    Cambridge University Press
    In:  The terrestrial biosphere and global change: Implications for natural and managed ecosystems
    Details
    Publication Date: 2022-03-21
    Type: info:eu-repo/semantics/bookPart
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  • 2
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    Use of models in global change studies (1999)
    Cambridge University Press
    In:  The terrestrial biosphere and global change: Implications for natural and managed ecosystems
    Details
    Publication Date: 2022-03-21
    Type: info:eu-repo/semantics/bookPart
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  • 3
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    Diet of the European flying squid Todarodes sagittatus (Cephalopoda: ommastrephidae) in the Balearic Sea (western Mediterranean) (1999)
    Cambridge University Press
    In:  Journal of the Marine Biological Association of the United Kingdom, 79 (3). pp. 479-486.
    Details
    Publication Date: 2021-06-17
    Description: Stomach contents of Todarodes sagittatus caught by trawlers working from 100 to 800 m depth in the Balearic Sea (western Mediterranean) were studied. From the 348 stomachs examined (153 males and 195 females) 33.62% were empty (39.21% in males and 29.74% in females). The diet of the squid was composed of 58 different prey items belonging to four major groups: Osteichthya, Crustacea, Cephalopoda and Chondrichthya. Osteichthyes, crustaceans and cephalopods were the most common prey, with a frequency of occurrence value of 84.85, 48.92 and 29.87% respectively. A change in the diet as the squid grows was observed, since juveniles feed basically on fishes while adults prey more actively on crustaceans. Analysis of the diet by size-classes reflected an ontogenetic migration to deeper waters since, parallel to the increase of size, a raise in the percentage of prey species inhabiting deeper waters was detected. Cannibalism was quite frequent, since T. sagittatus was the second most common cephalopod prey. Females had higher fullness-weight index and lower emptiness index than males, which reflects their major energetic demand for egg production.
    Type: Article , PeerReviewed
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  • 4
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    Population structure and growth of the squid Todarodes sagittatus (Cephalopoda: Ommastrephidae) in north-west African waters (1999)
    Cambridge University Press
    In:  Journal of the Marine Biological Association of the United Kingdom, 79 (3). pp. 467-477.
    Details
    Publication Date: 2021-06-11
    Description: The population structure of the European flying squid Todarodes sagittatus was studied using data of about 5000 squid caught in waters off the western Sahara between 1969 and 1997. The bulk of the population consisted of winter-spawned squid, which occurred as juveniles of 80–120 mm mantle length (ML) over the slope in spring, and as immature squid of 160–180 mm ML both on the shelf and slope in summer. In autumn, the squid attained 220–280 mm ML, matured, and shifted to the slope, where the spawning was supposed to occur in winter. Age and growth of T. sagittatus was studied using statolith ageing techniques. Assuming daily production of putative growth increments within statoliths, as well as sizes and proportions of immature and maturing females, the lifespan of the west Saharan populations of T. sagittatus lasts ∼1 y. Todarodes sagittatus is a fast growing squid at juvenile and immature ontogenetic phases. Early maturation (at ages 220–230 d in males and 250–260 d in females, respectively) and subsequent decrease of somatic growth rates caused rather small modal sizes of mature squid (250–300 mm ML) compared with those of their northern counterparts (350–420 mm ML). Both hatching dates and seasonality in occurrence of mature females shows that in waters off the western Sahara T. sagittatus spawns throughout the year with a well-pronounced winter peak.
    Type: Article , NonPeerReviewed
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  • 5
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    Egg size and fecundity in females of the subfamilies Todaropsinae and Todarodinae (Cephalopoda: Ommastrephidae) (1999)
    Cambridge University Press
    In:  Journal of the Marine Biological Association of the United Kingdom, 79 (3). pp. 569-570.
    Details
    Publication Date: 2021-06-11
    Description: Size of ripe eggs and potential fecundity are described in the squid of the subfamilies Todaropsinae and Todarodinae (Oegopsida: Ommastrephidae)— Todaropsis eblanae from West Africa, Todarodes angolensis from Namibia, Todarodes sagittatus from north-west Africa and the Mediterranean Sea, Todarodes sp. from the south-east Pacific, Nototodarus hawaiiensis from the south-east Pacific and West Indian Ocean and Martialia hyadesi from the south-west Atlantic. Females of both subfamilies are characterized by a wide range of ripe egg size (0.7–2.4 mm) and low and medium values of potential fecundity (20,000–2,500,000).
    Type: Article , PeerReviewed
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  • 6
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    Increased El Niño frequency in a climate model forced by future greenhouse warming (1999)
    Nature Publishing Group
    In:  Nature, 398 (6729). pp. 694-697.
    Details
    Publication Date: 2021-02-25
    Description: The El Niño/Southern Oscillation (ENSO) phenomenon is the strongest natural interannual climate fluctuation1. ENSO originates in the tropical Pacific Ocean and has large effects on the ecology of the region, but it also influences the entire global climate system and affects the societies and economies of manycountries2. ENSO can be understood as an irregular low-frequency oscillation between a warm (El Niño) and a cold (La Niña) state. The strong El Niños of 1982/1983 and 1997/1998, along with the more frequent occurrences of El Niños during the past few decades, raise the question of whether human-induced 'greenhouse' warming affects, or will affect, ENSO3. Several global climate models have been applied to transient greenhouse-gas-induced warming simulations to address this question4, 6, but the results have been debated owing to the inability of the models to fully simulate ENSO (because of their coarse equatorial resolution)7. Here we present results from a global climate model with sufficient resolution in the tropics to adequately represent the narrow equatorial upwelling and low-frequency waves. When the model is forced by a realistic future scenario of increasing greenhouse-gas concentrations, more frequent El-Niño-like conditions and stronger cold events in the tropical Pacific Ocean result
    Type: Article , PeerReviewed
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  • 7
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    Late Cretaceous climate, vegetation and ocean interactions (1999)
    Cambridge University Press
    In:  In: Warm climates in earth history. , ed. by Wing, S. L. Cambridge University Press, Cambridge, pp. 275-296. ISBN 9780521641425
    Details
    Publication Date: 2018-02-06
    Type: Book chapter , NonPeerReviewed
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  • 8
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    Ecology: Competition and coexistence (1999)
    Nature Publishing Group
    In:  Nature, 402 . pp. 366-367.
    Details
    Publication Date: 2017-02-28
    Type: Article , PeerReviewed
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  • 9
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    Possible predictability in overflow from the Denmark Strait (1999)
    Nature Publishing Group
    In:  Nature, 397 . pp. 243-246.
    Details
    Publication Date: 2017-02-28
    Description: The overflow and descent of cold dense water from the Denmark Strait sill-a submarine passage between Greenland and Iceland-is a principal means by which the deep ocean is ventilated, and is an important element in the global thermohaline circulation. Previous investigations of its variability-in particular, direct current measurements(1,2) in the overflow core since 1986-have shown surprisingly little evidence of long-term changes in now speed. Here we report significant changes in the overflow characteristics during the winter of 1996-97, measured using two current-meter moorings and an inverted echo sounder located at different depths in the fastest part of the now. The overflow warmed to the highest monthly value yet recorded (2.4 degrees C), and showed a pronounced slowing and thinning at its lower margin. We believe that the extreme warmth of the overflow caused it to run higher on the continental slope off east Greenland, so that the lower current meters and the echo sounder were temporarily outside and deeper than the fast-flowing core; model simulations appear to confirm this interpretation, We suggest that the extreme warmth of the overflow is a lagged response to a warming upstream in the Fram Strait three years earlier (caused by an exceptional amplification of the winter North Atlantic Oscillation). If this is so, over-now characteristics may be predictable.
    Type: Article , PeerReviewed
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  • 10
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    Oceanography: All change in the Arctic (1999)
    Nature Publishing Group
    In:  Nature, 397 (6718). pp. 389-391.
    Details
    Publication Date: 2015-07-16
    Type: Article , PeerReviewed
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