Spawning cycle of onychoteuthid squids in the southern Indian Ocean: new information from seabird predators

被引:88
作者
Cherel, Y [1 ]
Weimerskirch, H [1 ]
机构
[1] Ctr Etud Biol Chize, CNRS, F-79360 Villiers En Bois, France
关键词
Kondakovia longimana; Moroteuthis ingens; Moroteuthis knipovitchi; wandering albatross; king penguin; trophic web; Antarctica;
D O I
10.3354/meps188093
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Cephalopods play an important role in the trophic web of the Southern Ocean, but little information is available on their biology. The 2 largest sub-Antarctic seabirds, the king penguin Aptenodytes patagonicus and the wandering albatross Diomedea exulans, feed primarily on squids during the austral winter at the Crozet Islands. We examined a large number of accumulated cephalopod beaks in the stomach of these birds together with some undigested items; first, to understand how these 2 predators share the squid resource during winter, a period of supposed low food availability, and, second, to use a diving and a flying seabird as biological samplers of Southern Ocean cephalopods. Individuals of the family Onychoteuthidae formed the bulk of the squid diet, accounting for 72.6 and 57.0% of the number of lower beaks in samples from king penguins and wandering albatrosses, respectively. Seven different species were identified, the 3 main squids being Kondakovia longimana (38.8 and 28.0% by number for penguins and albatrosses, respectively), Moroteuthis ingens (13.5 and 26.2 %) and M. knipovitchi (20.1 and 2.3 %). Both seabirds preyed upon the same cephalopod species, but penguins primarily took small- to medium-sized juveniles (99.0% of the onychoteuthids) and albatrosses preyed on larger adult specimens (96.0 %). Fresh remains indicated that adult K. longimana and M. ingens were mature individuals which, as shown by satellite tracking of albatrosses, were taken over the slope and nearby oceanic waters surrounding the archipelago. The present study indicates that mating/spawning of K. longimana and M. ingens occurs in Crozet waters during the winter months. It also extends the biogeography of K. longimana to north of the Antarctic Polar Front, in the Polar Frontal Zone, where it has not previously been recorded.
引用
收藏
页码:93 / 104
页数:12
相关论文
共 72 条
[1]   SEASONAL-VARIATION IN THE DIET OF THE KING PENGUIN (APTENODYTES-PATAGONICUS) AT SUB-ANTARCTIC MARION ISLAND [J].
ADAMS, NJ ;
KLAGES, NT .
JOURNAL OF ZOOLOGY, 1987, 212 :303-324
[2]  
[Anonymous], BR ANTARCT SURV B
[3]  
[Anonymous], 1982, BRIT ANTARCT SURV B
[4]  
[Anonymous], 1987, CEPHALOPODS WORLD SQ
[5]   Ecology of the oceanic squid Onychoteuthis banksi and the relationship between the genera Onychoteuthis and Chaunoteuthis (Cephalopoda: Onychoteuthidae) [J].
Arkhipkin, AI ;
Nigmatullin, CM .
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM, 1997, 77 (03) :839-869
[6]   Chaunoteuthis mollis:: Re-examination of a Mediterranean specimen and its identity with Onychoteuthis banksii (Cephalopoda: Onychoteuthidae) [J].
Bello, G .
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM, 1998, 78 (03) :1027-1030
[7]   Foraging habitat and food intake of satellite-tracked king penguins during the austral summer at Crozet Archipelago [J].
Bost, CA ;
Georges, JY ;
Guinet, C ;
Cherel, Y ;
Putz, K ;
Charrassin, JB ;
Handrich, Y ;
Zorn, T ;
Lage, J ;
LeMaho, Y .
MARINE ECOLOGY PROGRESS SERIES, 1997, 150 (1-3) :21-33
[8]   SEASONAL AND ANNUAL VARIATION IN DIETS OF MACARONI (EUDYPTES-CHRYSOLOPHUS-CHRYSOLOPHUS) AND SOUTHERN ROCKHOPPER (E-CHRYSOCOME-CHRYSOCOME) PENGUINS AT SUB-ANTARCTIC MARION ISLAND [J].
BROWN, CR ;
KLAGES, NT .
JOURNAL OF ZOOLOGY, 1987, 212 :7-28
[9]  
Cherel Y, 1998, ALBATROSS: BIOLOGY AND CONSERVATION, P113
[10]   Fish and squid in the diet of king penguin chicks, Aptenodytes patagonicus, during winter at sub-antarctic Crozet Islands [J].
Cherel, Y ;
Ridoux, V ;
Rodhouse, PG .
MARINE BIOLOGY, 1996, 126 (04) :559-570