求翻译：k,an operation manager,said it was in fishermen's interests to stop the speard."despite their fearsome name,the shrimp are not a threat to people,but the damage they could cause to our environment here in the north west is very real.because of what they eat ahd the rate that they eat it,the shrimp can change the food chain ahd our ecosystem,threatening native species.we're also encouraging all anglers who use our reservoirs to help us prevent the spread of the shrimp,by washing down all fishing equipment beforeahd after use是什么意思？

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