摘要:

The development of sensory systems and the coincident acquisition of associated behaviors were examined in two paternal brooders, largemouth bassMicropterus salmoidesand Nile tilapiaTilapia nilotica. In newly hatched eleutheroembryos of largemouth bass, the eyes are unpigmented, the nares are closed, and the free neuromasts and taste buds are not developed. Six hours after hatching (when the epithelium of the otic vesicle is ciliated), the eleutheroembryos are able to aggregate by responding to the movements of neighboring siblings. Thereafter, four correlations between sense organ development and initiation of fish behavior were observed: appearance of the first free neuromasts on the head and positive rheotaxis; morphological completion of the larval-type retina and positive phototaxis; formation of twin cones in the retina and optomotor reaction; and appearance of taste buds in the oral cavity and selective feeding. The ontogenetic development of the sense organs of Nile tilapia reflects adaptations to early life in the parent's buccal cavity. The young of both species leave the custodial care of the parent when their sense organs become differentiated as adultlike forms.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1989)118<0203:OCIBAS>2.3.CO;2

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Early life history stages are becoming increasingly important to systematic and evolutionary studies of fishes. To meet the needs of this new emphasis in research, museums must add such material to their collections. At the same time, field-oriented institutions must make their collections of larval fishes available for deposit in museums. Much valuable material has been lost in the past because it was not properly curated. Curatorial procedures are discussed, and recommendations are made for proper handling of larval fishes.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1989)118<0214:ROMISO>2.3.CO;2

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0002-8487    

DOI:10.1577/1548-8659-118.2.218

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0002-8487    

DOI:10.1577/1548-8659-118.2.228

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor