Mouth gape, food size, and diet of the common smeltRetropinna retropinna(Richardson) in the Waikato River system, North Island, New Zealand

Autor:	Fredrick J. Ward, Jacques Boubée
Rok vydání:	1997
Předmět:	geography geography.geographical_feature_category Ecology biology Retropinna retropinna Estuary Aquatic Science biology.organism_classification Generalist and specialist species Zooplankton Predation Fishery Algae Fish Smelt Ecology Evolution Behavior and Systematics Water Science and Technology
Zdroj:	New Zealand Journal of Marine and Freshwater Research. 31:147-154
ISSN:	1175-8805 0028-8330
Popis:	The feeding ecology of the common smelt, Retropinna retropinna, was determined at several locations on the Waikato River system. The mean size of the dominant prey was found to increase as smelt mouth gape increased. Smelt smaller than 40 mm total length fed mostly on zooplankton. Chironomid larvae, pupae, and adults were the dominant foods of larger fish from most sites, although mysids and amphipods were the major prey in Lake Waahi and the Waikato River estuary. Algae were the dominant food in many smelt but ingestion was probably incidental. Seasonal and annual differences in dominant foods were minor. Common smelt are generalists, capable of feeding on the majority of smaller organisms present in their different environments; however, they may grow faster and achieve a larger adult size when food of optimal size and nutritive value is present.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9966db6494262fe974644d33993c0f44 https://doi.org/10.1080/00288330.1997.9516753 Zobrazit plný text záznamu