Feeding ecology of two nototheniid fishes,Trematomus hansoni and Trematomus loennbergii,from Terra Nova Bay,Ross Sea |
| |
Authors: | M La Mesa M Vacchi A Castelli G Diviacco |
| |
Institution: | (1) ICRAM – Istituto Centrale per la Ricerca Scientifica e Tecnologica Applicata al Mare, via Lorenzo Respighi 5, 00197 Roma, Italy fax: 39 68 088 326, IT;(2) Università di Sassari, via Margherita di Savoia 15, 07100 Sassari, Italy, IT |
| |
Abstract: | A study of feeding ecology in Trematomus hansoni Boulenger 1902 and Trematomus loennbergii Regan 1913 was carried out from samples collected in the austral summer 1990–1991 off Terra Nova Bay, Ross Sea. T. hansoni was caught between 35 and 566 m and T loennbergii between 311 and 543 m. Stomach contents analysis shows that T. loennbergii relies on a wider range of prey than T. hansoni. Fish and decapods are the main food resources of T. loennbergii, which feeds also on epifaunal and tube-dwelling polychaetes. T. hansoni mostly relies on fish resources that are made up of juvenile stages of fish and eggs. Despite the common area occupied by
the two species, the interspecific competition is mostly mitigated due either to taking different prey or to taking different
amounts of the same prey.
Received: 31 October 1995/Accepted: 20 February 1996 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|