| Nước | Portugal | Hệ sinh thái | Atlantic Ocean |
| Địa phương | south and southwest coast of Portugal | Depth | |
| được giới thiệu | Year Intro. | ||
| Giai đoạn của vòng đời | not specified | unsexed | |
| Quantitative | 6 | Unit | number |
| Semi Quantitative | <100 | Unit | number |
| Qualitative | rare | ||
| Năm | 2006 - 2007 | Thời kỳ (giai đoạn, chu kỳ) | 2001-present |
| Số liệu | 01/08/06 - 31/07/07 | Record Type | survey |
| Record Type | survey | ||
| Seasonal | not specified | Phương pháp | random sampling |
| Các chú thích | Mass = 1.5 kg; mean total length = 37.0 cm ± 4.2. A complementary survey, using an aerial-roving design, was conducted to assess recreational shore fishing. Aerial surveys were conducted twice a month to obtain instantaneous counts of the anglers in the whole sampling area (with dates, starting time and flight direction randomly selected to minimize visibility bias). Flights were conducted at low altitude (150-200 m) and speed (c. 150km/hr). Roving creel surveys (on-site angler surveys during which angler's harvests were examined) were conducted following a non-uniform probability of sampling, with probabilities assigned to each section based on mean effort data of the previous months (from aerial surveys) (Ref. 85154). | ||