Sticholonche zanclea (Protozoa, Actinopoda) in fecal pellets of copepods and Euphausia sp. in Brazilian coastal waters.
نویسنده
چکیده
Fecal pellets produced by mesozooplanktonic copepods (Centropages velificatus and Paracalanus parvus) and macrozooplanktonic Euphausiacea (Euphausia sp.) were examined using scanning electron microscopy. Fragments of the protozoan Sticholonche zanclea were found in both copepod and in Euphausia sp. fecal pellets, even when the abundance of the protozoan in the water was low. The results suggest that S. zanclea is an important food resource for different trophic levels, including meso- and macrozooplankton, in Brazilian coastal waters.
منابع مشابه
Coprorhexy, coprophagy, and coprochaly in the copepods Calanus helgolandicus, Pseudocalanus elongatus, and Oithona similis
Studies of fecal pellet flux show that a large percentage of pellets produced in the upper ocean is degraded within the surface waters. It is therefore important to investigate these degradation mechanisms to understand the role of fecal pellets in the oceanic carbon cycle. Degradation of pellets is mainly thought to be caused by coprophagy (ingestion of fecal pellets) by copepods, and especial...
متن کاملProduction, oxygen respiration rates, and sinking velocity of copepod fecal pellets: Direct measurements of ballasting by opal and calcite
Production, oxygen uptake, and sinking velocity of copepod fecal pellets egested by Temora longicornis were measured using a nanoflagellate (Rhodomonas sp.), a diatom (Thalassiosira weissflogii), or a coccolithophorid (Emiliania huxleyi) as food sources. Fecal pellet production varied between 0.8 pellets ind21 h21 and 3.8 pellets ind21 h21 and was significantly higher with T. weissflogii than w...
متن کاملOptimizing Extraction of total phenolic Compounds in Sargassum sp. and sea lettuce (Ulva sp.) in Chabahar coastal waters using ultrasonic method
Abstract The phenolic compounds contain antioxidant properties that can be effective in the treatment of some chronic and malignant diseases. The aim of this study was to determine optimal conditions for extraction of total phenolic compounds from Sargassum sp. and Sea lettuce (Ulva sp.) in Chabahar coastal waters. The extracts of these two algae were extracted by ultrasonic method and then th...
متن کاملStudy of morphological charachteristic and abundance of larval stages of Polyonyx sp. (Anomura: Porcellanidae) for the first time from Iranian costal of Persian Gulf
Anomura is a group of Malacostraca that constitute important communities of marine intertidal zone and deeper communities of benthic habitats. The larval stages differ among families of Anomura. In this investigation Anomura larval populations were sampled and studied from Iranian coastal waters of Persian Gulf in monthly basis from March to October 2011. Sampling process was conducted using su...
متن کاملResponse of marine copepods to a changing tropical environment: winners, losers and implications
Background. Climate change concurrent with anthropogenic disturbances can initiate serial changes that reverberate up the food chain with repercussions for fisheries. To date, there is no information available concerning the combined effects of global warming and human impacts on tropical marine food webs. While temperate copepods respond differently to warming and environmental stressors, the ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Brazilian journal of biology = Revista brasleira de biologia
دوره 66 3 شماره
صفحات -
تاریخ انتشار 2006