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This stretch of the Monnow river in Herefordshire looks pristine. Oh. I' m all tangled up. But the anglers here are being taught how to read the warning signs below the water' s surface. This is a caddisfly, a cased caddis. I' ve gone back to school with a group of local anglers who are finding out it' s not fish but riverflies that are the key. Head teacher for the day is museum research entomologist Steve Brooks. Now actually, I hope some of you will take it a little bit further than this and get interested in the insects in themselves. Maybe you' ll even spend more time looking at the insects than fishing. These larvae are the first things to be hit when the river is polluted. Fewer larvae means fewer fish, and that of course means unhappy fishermen. Well, anglers have got a vested interest in the rivers. They spend a lot of money on their kit, and they spend a lot of money on their licence fees. And so if the fishing isn' t any good, they' re wanna know why. And they' re on the river a lot as well, and they spend half their lives on the river, so they' re ideal for having a look at what insects are there and working out what the water quality' s like. |
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màn nuò hé zài hè lǐ fú dé jùn de zhè yí dài liú yù, hái bǎo liú zhe yuán shǐ de zhuàng tài, dōu chán zài yì qǐ le. dàn shì zhè yī shuǐ yù de chuí diào zhě zhī dào, rú hé dú dǒng shuǐ miàn xià de jǐng shì. zhè shì shí é, yòu chēng máo chì mù. wǒ hé yī qún dāng dì de chuí diào zhě, yì qǐ huí dào xué xiào. tā men fā xiàn wèn tí de guān jiàn bú shì yú lèi, ér shì hé yíng. jīn tiān de zhǔ jiǎng jiào shī shì bó wù guǎn kūn chóng xué jiā shǐ dì fū bù lǔ kè sī. wǒ xī wàng nǐ men de gōng zuò néng gòu gēng shēn rù yī xiē, duì kūn chóng shì jiè chǎn shēng nóng hòu de xìng qù. huò xǔ diào yú zhī wài, nǐ men huì huā gèng duō shí jiān guān chá kūn chóng. dāng hé shuǐ shòu dào wū rǎn hòu, zhèi xiē yòu chóng shǒu dāng qí chōng, yòu chóng shù liàng jiǎn shǎo dǎo zhì yú lèi shù liàng jiǎn shǎo, dāng rán yú mín yě yōu xīn chōng chōng. zài bǔ yú yè zhōng, yú mín yǒu jì dé lì yì, tā men de zhuāng bèi hěn áng guì, bǔ yú zhí zhào fèi yòng yě bù fěi. suǒ yǐ rú guǒ diào bú dào yú, tā men xiǎng zhī dào yuán yīn, tā men cháng cháng shǒu zài hé biān, jī jìn bàn shēng, suǒ yǐ yào chá míng hé lǐ kūn chóng zhǒng lèi, diào chá hé shuǐ zhì liàng, tā men jiù shì lǐ xiǎng rén xuǎn. |