The Life of the Salmon With Reference More Especially to the Fish in Scotland
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Also we have Osmerus (the smelt or spar- ling), which is classed along with four other genera, three of which are marine, coming into our estuaries to spawn. In the allied group of fishes, including the herrings, we also see the herring itself, the sprat, and the shads coming freely into estuaries, and the shads spawning in fresh water.
If, further, we consider the salmonids, let us say the British salmonids, which are commonly found in fresh water, and note their characteristics in relation to... the common developmental characteristics of the genus Salmo, we may observe that certain features common to salmon parr, the so-called parr marks and the complete dentition, very usually survive throughout the life of the fresh water form.
If salmon smolts are retained in fresh water beyond their natural time of descent to the sea, they assume again the trout-like appearance of the juvenile.
We have already seen in the previous chapter that the Howietoun specimens which spawned, and which were figured by Day in the Transactions of the Linnsean Society, retained the parr marks.
What to read after The Life of the Salmon With Reference More Especially to the Fish in Scotland?
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To quickly assess the difficulty of the text, read a short excerpt:
Also we have Osmerus (the smelt or spar- ling), which is classed along with four other genera, three of which are marine, coming into our estuaries to spawn. In the allied group of fishes, including the herrings, we also see the herring itself, the sprat, and the shads coming freely into estuaries, and the shads spawning in fresh water.
If, further, we consider the salmonids, let us say the British salmonids, which are commonly found in fresh water, and note their characteristics in relation to... the common developmental characteristics of the genus Salmo, we may observe that certain features common to salmon parr, the so-called parr marks and the complete dentition, very usually survive throughout the life of the fresh water form.
If salmon smolts are retained in fresh water beyond their natural time of descent to the sea, they assume again the trout-like appearance of the juvenile.
We have already seen in the previous chapter that the Howietoun specimens which spawned, and which were figured by Day in the Transactions of the Linnsean Society, retained the parr marks.
What to read after The Life of the Salmon With Reference More Especially to the Fish in Scotland?
You can find similar books in the "Read Also" column, or choose other free books by W L William Leadbetter Calderwood to read onlineMoreLess
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