STUDIES ON FUNCTIONAL MORPHOLOGY IN THE DIGESTIVE SYSTEM OF OREASTER RETICULATUS (L.) (ASTEROIDEA)
نویسندگان
چکیده
منابع مشابه
Dynamics and Feeding Activity of High-Density Aggregations of Oreaster reticulatus (Echinodermata: Asteroidea) in a Sand Patch Habitat
Aggregations of Oreaster reticulatus (L.) in a large sand patch amid an offshore seagrass bed (Syringodium filiforme) off St. Croix (US Virgin Islands) were characterized by protracted fronts of high density (2-7 individuals m-2). Fronts mlgrated across the sand patch at approximately 7 m d-l and were refracted and deflected at the grassbed border. Intensive microphagous feeding effected a 2-fo...
متن کاملAnnual reproductive cycle, spatial distribution, abundance, and size structure of Oreaster reticulatus (Echinodermata: Asteroidea) in Bocas del Toro, Panama
The structure, distribution, and population abundance of Oreaster reticulatus (Linnaeus, 1758) in 47,157 ha of shallow-water habitat in the archipelago of Bocas del Toro, Panama, were assessed from May to October 2000. The reproductive cycle of the sea star was studied in Isla Solarte, from February 2000 to February 2001. In total, 4,818 sea stars were recorded with a mean density of 149.7 ind....
متن کاملthe effect of functional/notional approach on the proficiency level of efl learners and its evaluation through functional test
in fact, this study focused on the following questions: 1. is there any difference between the effect of functional/notional approach and the structural approaches to language teaching on the proficiency test of efl learners? 2. can a rather innovative language test referred to as "functional test" ge devised so so to measure the proficiency test of efl learners, and thus be as much reliable an...
15 صفحه اولthe impact of e-readiness on ec success in public sector in iran the impact of e-readiness on ec success in public sector in iran
acknowledge the importance of e-commerce to their countries and to survival of their businesses and in creating and encouraging an atmosphere for the wide adoption and success of e-commerce in the long term. the investment for implementing e-commerce in the public sector is one of the areas which is focused in government‘s action plan for cross-disciplinary it development and e-readiness in go...
ذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1978
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1540770