RRS Challenger CH7/81
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Challenger (74CH) |
| Cruise identifier | CH7/81 |
| Cruise period | 1981-04-28 — 1981-05-12 |
| Status | Completed |
| Port of departure | Ardrossan, United Kingdom |
| Port of return | Barry, United Kingdom |
| Purpose | Research |
| Objectives | 1. To continue the seasonal survey of the deep-sea demersal fish populations of the upper slopes (500 - 1250m) of the Porcupine Sea Bight using the SMBA Granton trawl.
2. To continue the seasonal survey of the deep-sea demersal fish using the Porcupine Sea Bight (500 - 4800m) using the IOS semi-balloon otter trawl (OTSB 14). 3. To trawl for demersal fish at the SMBA permanent station (2900m) on the Rockall Trough and collect the invertebrates for Dr. Gage, SMBA. 4. To collect fish samples for Dr. Pentreath (MAFF Radiobiological Laboratories, Lowestoft). 5. To collect ripe ovaries from a wide range of species for studies of egg quality by Dr. Craik, SMBA. 6. To collect specimens for the Zoological Museum, University of Hamburg; Royal Scottish Museum, Edinburgh and the University Marine Biological Station, Millport. |
| Chief scientist | John D M Gordon (Scottish Marine Biological Association) |
| Cruise report |  (0.26 MB) |
| Ocean/sea areas | |
| General | North East Atlantic Ocean (limit 40W) |
| Specific | Porcupine Bight |
| Track charts |  |
| Measurements | |
| Biology and fisheries | |
| Zoobenthos | Quantity: number of hauls = 27 |
| Demersal fish | Quantity: number of hauls = 27 Description: Granton trawls to survey taxonomy, energy transfers, biomass determination and distribution. |
| Exploratory fishing | Quantity: number of hauls = 27 |
