CHUM SALMON ONCORHYNCHUS KETA (WALBAUM) ON THE CONTINENTAL COAST OF THE OKHOTSK SEA. COMMUNICATION 1. THE SPAWNERS

Chum salmon Oncorhynchus keta (Walbaum) on the continental coast of the Okhotsk Sea. Communication 1. The spawners

Chum salmon is a widely spread species on the continental coast of the Okhotsk Sea presented exclusively by typical anadromous phenotype.Abundance of the runs is well correlated with length of the spawning rivers, whereas dynamics Timer Knob Ratchet of the runs is determined by variations of climate conditions and press of commercial fishery.Detail

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ECOLOGICAL APPROACH TO THE ANALYSIS OF CONDITIONS OF FAMILY LIFE

Ecology is the historical and evolutionary science that explores the nature of the system over time.Bringing people together and the family as a system is the central subject of social ecology as a science.An ecological approach is a general scientific approach that is driven by research and reflection relations and interactions of organisms and po

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Welfare of organic laying hens kept at different indoor stocking densities in a multi-tier aviary system. II: live weight, health measures and perching

Multi-tier aviary systems, where conveyor belts below the tiers remove the manure at regular intervals, are becoming more common in organic egg production.The area on the tiers can be included in the net area available to the hens (also referred to as Crouton usable area) when calculating maximum indoor stocking densities in organic systems within

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