摘要:

Rates of natural mortality (M) ofHaliotis iriswere estimated by monitoring enclosed populations, and from the frequency of empty marked shells recovered from natural populations. Annual instantaneous rates were ≤ 0.1 in all instances. The major source of mortality was predation by the starfishAstrostole scabra. Predation by fishes was evidently low. The low rates of natural mortality suggest that fisheries forH.irismay be less productive than those of other species of abalone.

ISSN:0028-8330    

DOI:10.1080/00288330.1997.9516750

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

Coolia monotisMeunier (Dinophyceae) was isolated from drift seaweed collected from Ninety Mile Beach, Northland, New Zealand. It is a new record for New Zealand waters. The microalga was identified by scanning electron microscopy and cultured in a seawater‐based medium. Cultures grew preferentially at 25°C (subtropical temperatures), rather than at 20°C (temperate), and at salinities >28.Coolia monotisproved to be toxic to larvae ofArtemia salinaandHaliotis virginea.

ISSN:0028-8330    

DOI:10.1080/00288330.1997.9516751

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

ISSN:0028-8330    

DOI:10.1080/00288330.1997.9516752

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor