Heterodoxy 发表于 2025-3-25 04:07:57

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债务 发表于 2025-3-25 09:15:17

Agriculture, fournisseurs, filières fascine or limestone boulders, is unfavourable for fish only in the initial phase and more in small than in large rivers. Revetments provide many hiding places for fish and make net operation for poachers more difficult, but they are quickly damaged by water flow.

Mendicant 发表于 2025-3-25 11:45:21

Médecines d‘Asie: Savoirs et Pratiquesarlings. In River Skjern Å the material will be offspring of the local stock. In the other rivers where the natural stocks have become extinct, the stocking material will be offspring from Irish, Scottish and Swedish salmon stocks, sometimes combined with material from River Skjern Å.

grounded 发表于 2025-3-25 16:45:50

Endangered freshwater fish of Spainn, while 25 species are included in the EU Council Directive on the Conservation of Natural Habitats in 1992. Nevertheless, Spanish conservation laws are still insufficient since only seven species are protected by the National Catalogue of Threatened Species in 1990.

Osteons 发表于 2025-3-25 21:51:29

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固定某物 发表于 2025-3-26 01:04:48

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decipher 发表于 2025-3-26 05:04:06

Natural regenerations of endangered fish populations in the Pilica drainage basin after reducing hum fascine or limestone boulders, is unfavourable for fish only in the initial phase and more in small than in large rivers. Revetments provide many hiding places for fish and make net operation for poachers more difficult, but they are quickly damaged by water flow.

HEDGE 发表于 2025-3-26 10:30:13

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压倒性胜利 发表于 2025-3-26 13:46:03

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STING 发表于 2025-3-26 20:40:54

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查看完整版本: Titlebook: Conservation of Endangered Freshwater Fish in Europe; A. Kirchhofer,D. Hefti Book 1996 Birkhäuser Verlag, PO Box 133, CH-4010 Basel, Switz