Six species under the surface
A sample shows a small portrait of the Tâmega in Cavez.
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At station 22, the report of 2016–2017 registered barbo-common, Northern boga-do-north, northern scale, embroidery, gobium and sunroof. The chart places the station in Cavez. These results document that campaign: they are neither a current inventory nor an indication of places to fish.
The six names open six ways to look at the river. The barb leads to migration in fresh water; the boga, the differences between young and adults; the scale, the drawing of scales. The embroidery and the gobium help to explore the food. The sunbath introduces the question of geographical origin. It opens the cards to choose one of these clues and get to the explanation of the species.
Sampling and biological datasheets have different functions.The survey documents the fish registered in that place and period.The datasheets explain the general characteristics of the species, without demonstrating that all these behaviors were observed in Cavez.
You know the six fish from the lift
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Barbo: trips in fresh water
The beard makes the breeding migration entirely in fresh water. Feeding and reproducing can take you to different areas of the river.
A fish can migrate without going to sea →Boga: current and growth
Age makes a difference: the description of the boga distinguishes adults in strong current and juveniles in waters of lower current.
The preferred current changes with age →Scale: a pattern in the scales
The dark margins of the scales create a network design. The description of the body is a clue to know the species without identifying a fish from a distance.
A fish with a network of scales →Border: insects in the menu
The menu connects water and margins: the chart describes insect larvae and increased consumption of terrestrial insects in summer and early autumn.
A fish menu also has insects →Gobium: small prey
Small invertebrates are part of the feeding of the gobium. The usual measurement indicated in the form is not a measurement of the specimens Cavez.
A small fish, many small prey →Sunshine: know the origin
Sunshine comes from North America. Being recorded on a sample and knowing its local impact are different things.
Not all the fish from the river came from here →
Source and context
Mora Fluviary — Barbo-common, biology of the species
Accessed:
Municipality of Santa Maria da Feira — Northern Boga, fauna catalogue
Accessed:
Arouca Geopark — Northern scale, Squalius carolitertii: description and biology
Accessed:
ICNF — embroidery, ecology and riverside vegetation, pp. 2–3 (bibliography up to 2005)
Accessed:
Gaia Biological Park — Gobio, Gobio lozanoi: habitat, food and size
Accessed:
Águeda River Interpretation Center — Sun Loss
Accessed:
Editorial summary; the date of consultation is not the date of the facts.